ADA4432-1BCPZ-R7 [ADI]
SD Video Filter Amplifiers; 标清视频滤波放大器
| 型号： | ADA4432-1BCPZ-R7 |
| 厂家： | 
ADI |
| 描述： | SD Video Filter Amplifiers |
| 文件： | 总28页 (文件大小：472K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SD Video Filter Amplifiers
with Output Short-to-Battery Protection
ADA4432-1/ADA4433-1
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
STB
Qualified for automotive applications
Output overvoltage (short-to-battery) protection up to 18 V
Short-to-battery output flag for wire diagnostics
Output short-to-ground protection
Fifth-order, low-pass video filter
0.1 dB flatness to 3 MHz
ENA
+V
(LFCSP ONLY)
S
ADA4432-1
IN
OUT
×1
STB
×2
SD
−3 dB bandwidth of 10 MHz
45 dB rejection at 27 MHz
OFFSET
Ultralow power-down current: 13.5 µA typical
Low quiescent current
7.6 mA typical (ADA4432-1)
GND
13.2 mA typical (ADA4433-1)
Figure 1.
Low supply voltage: 2.6 V to 3.6 V
Small packaging
8-lead, 3 mm × 3 mm LFCSP
ENA
+V
STB
2R
S
ADA4433-1
6-lead SOT-23 (ADA4432-1 only)
Wide operating temperature range: −40°C to +125°C
+IN
–IN
×1
SD
R
R
+
–
–OUT
+OUT
STB
APPLICATIONS
STB
2R
Automotive rearview cameras
Automotive video electronic control units (ECUs)
Surveillance video systems
×1
SD
GND
GENERAL DESCRIPTION
Figure 2.
The ADA4432-1 (single-ended output) and ADA4433-1
(differential output) are fully integrated video reconstruction
filters that combine overvoltage protection (short-to-battery [STB]
protection) and short-to-ground (STG) protection on the outputs,
with excellent video specifications and low power consumption.
The combination of STB protection and robust ESD tolerance
allows the ADA4432-1 and the ADA4433-1 to provide superior
protection in the hostile automotive environment.
The short-to-battery protection integrated into the ADA4432-1
and ADA4433-1 protects against both dc and transient
overvoltage events, caused by an accidental short to a battery
voltage up to 18 V. The Analog Devices, Inc., short-to-battery
protection eliminates the need for large output coupling capacitors
and other complicated circuits used to protect standard video
amplifiers, saving space and cost.
The ADA4432-1 and ADA4433-1 feature a high-order filter with
−3 dB cutoff frequency response at 10 MHz and 45 dB of rejection
at 27 MHz. The ADA4432-1 and ADA4433-1 feature an internally
fixed gain of 2 V/V. This makes the ADA4432-1 and ADA4433-1
ideal for SD video applications, including NTSC and PAL.
The ADA4432-1 is a single-ended input/single-ended output
video filter capable of driving long back-terminated cables.
The ADA4433-1 is a fully differential video filter that can be
used as a fully differential input to a differential output or as a
single-ended input to a differential output, allowing it to easily
connect to both differential and single-ended sources. It is
capable of driving twisted pair or coaxial cable with minimal
line attenuation. Differential signal processing reduces the effects
of ground noise, which can plague ground referenced systems.
The ADA4433-1 is ideal for differential signal processing (gain
and filtering) throughout the signal chain, simplifying the
conversion between single-ended and differential components.
The ADA4432-1 and ADA4433-1 operate on single supplies as
low as 2.6 V and as high as 3.6 V while providing the dynamic
range required by the most demanding video systems.
The ADA4432-1 and ADA4433-1 are offered in an 8-lead, 3 mm ×
3 mm LFCSP package. The ADA4432-1 is also available in a
6-lead SOT-23 package. All are rated for operation over the
wide automotive temperature range of −40°C to +125°C.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2012 Analog Devices, Inc. All rights reserved.
ADA4432-1/ADA4433-1
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Overvoltage (Short-to-Battery) Protection ................................ 15
Short-to-Battery Output Flag ................................................... 15
ESD Protection ........................................................................... 16
Enable/Disable Modes (ENA Pin) ........................................... 16
Operating Supply Voltage Range.............................................. 16
Applications Information .............................................................. 17
Methods of Transmission.......................................................... 17
Printed Circuit Board (PCB) Layout ....................................... 17
Configuring the ADA4433-1 for Single-Ended Input Signals... 18
Pin-Compatible ADA4432-1 and ADA4433-1 ...................... 19
Typical Application Circuits ..................................................... 20
Fully DC-Coupled Transmission Line .................................... 22
Low Power Considerations....................................................... 23
Outline Dimensions....................................................................... 24
Ordering Guide .......................................................................... 25
Automotive Products................................................................. 25
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
ADA4432-1 Specifications .......................................................... 3
ADA4433-1 Specifications .......................................................... 4
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
Maximum Power Dissipation ..................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 9
ADA4432-1 Typical Performance Characteristics................... 9
ADA4433-1 Typical Performance Characteristics................. 12
Theory of Operation ...................................................................... 15
Short Circuit (Short-to-Ground) Protection.............................. 15
REVISION HISTORY
5/12—Rev. 0 to Rev. A
Changed Fully Differential Transmission Mode Section to Fully
Differential Mode Section ............................................................. 17
Added Pin Compatible ADA4432-1 and ADA4433-1 Section,
Example Configuration for Package-Compatible PCB Section,
and Figure 48 to Figure 51 ............................................................ 19
Added Figure 52 ............................................................................. 20
Added Figure 54 ............................................................................. 22
Added Low Power Consideration, Figure 56, and Figure 57.... 23
Updated Outline Dimensions....................................................... 24
Changes to Ordering Guide.......................................................... 25
Added ADA4432-1 and 6-Lead SOT-23 .........................Universal
Added Figure 1; Renumbered Sequentially .................................. 1
Added Table 1; Renumbered Sequentially .................................... 3
Changes to Table 2............................................................................ 4
Added Figure 4, Figure 5, Table 5, and Table 6............................. 7
Added Figure 7 to Figure 24............................................................ 9
Changes to Operating Supply Voltage Range Section ............... 16
Added Methods of Transmission Section, Pseudo Differential
Mode (Unbalanced Source Termination) Section, Figure 43,
Pseudo Differential Mode (Balanced Source Impedance)
Section and Figure 44..................................................................... 17
4/12—Revision 0: Initial Version
Rev. A | Page 2 of 28
Data Sheet
ADA4432-1/ADA4433-1
SPECIFICATIONS
ADA4432-1 SPECIFICATIONS
TA = 25°C, +VS = 3.3 V, RL = 150 Ω, unless otherwise specified.
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
−3 dB Large Signal Bandwidth
VOUT = 0.2 V p-p
VOUT = 2 V p-p
ADA4432-1W only: TMIN to TMAX
VOUT = 2 V p-p
ADA4432-1W only: TMIN to TMAX
VOUT = 2 V p-p
f = 27 MHz, VOUT = 2 V p-p
ADA4432-1W only: TMIN to TMAX
Modulated 10-step ramp, sync tip at 0 V
Modulated 10-step ramp, sync tip at 0 V
f = 100 kHz to 5 MHz
10.5
10.5
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
%
Degrees
ns
dB
9.3
8.6
8.3
7.6
1 dB Flatness
9.4
0.1 dB Flatness
Out-of-Band Rejection
3.3
43
37
35
Differential Gain
Differential Phase
Group Delay Variation
Pass Band Gain
0.38
0.69
8
5.80
5.57
6
6.24
6.44
ADA4432-1W only: TMIN to TMAX
dB
NOISE/HARMONIC PERFORMANCE
Signal-to-Noise Ratio
100% white signal, f = 100 kHz to 5 MHz
70
dB
INPUT CHARACTERISTICS
Input Voltage Range
Limited by the output voltage range
ADA4432-1W only: TMIN to TMAX
0 to 1.34 0 to 1.4
0 to 1.45
0 to 1.47
V
V
GΩ
pF
pA
0 to 1.3
>1.0
8
Input Resistance
Input Capacitance
Input Bias Current
35
OUTPUT CHARACTERISTICS
Output Offset Voltage
VIN = 0 V
ADA4432-1W only: TMIN to TMAX
RL = 150 Ω
192
280
300
+VS − 0.42
+VS − 0.45
mV
mV
V
V
mA
mA
Output Voltage Swing
0.28
0.30
37
ADA4432-1W only: TMIN to TMAX
Linear Output Current
Short-Circuit Output Current
SHORT-TO-BATTERY
50
Overvoltage Protection Range
+VS
+VS
6.3
6.0
18
18
8.1
8.4
V
V
V
V
ns
ns
ADA4432-1W only: TMIN to TMAX
Back termination = 75 Ω
ADA4432-1W only: TMIN to TMAX
After the fault is applied
STB Output Trigger Threshold
7.2
Disconnect Time
Reconnect Time
150
300
After the fault is removed
POWER SUPPLY
Power Supply Range1
Quiescent Current
2.6
3.6
10
13
20
25
V
No input signal, no load
ADA4432-1W only: TMIN to TMAX
ENA = 0 V
7.6
14
mA
mA
µA
µA
mA
mA
dB
Quiescent Current, Disabled
ADA4432-1W only: TMIN to TMAX
Quiescent Current, Short-to-Battery Short-to-battery fault condition: 18 V
Quiescent Current, Short to Ground Short on far end of output termination (75 Ω)
PSRR
4.6
47
−63
Δ+VS RIPPLE
=
0.3 V, f = dc
ENABLE PIN
Input Leakage Current
ENA = high/low
+0.3/−14
µA
Rev. A | Page 3 of 28
ADA4432-1/ADA4433-1
Data Sheet
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
LOGIC OUTPUT/INPUT LEVELS
STB VOH
STB VOL
ENA VIH
ENA VIL
VOUT ≥ 7.2 V (fault condition)
VOUT ≤ 3.1 V (normal operation)
Input voltage to enable device
Input voltage to disable device
3.3
V
mV
V
0.02
≥2.4
≤0.6
V
OPERATING TEMPERATURE RANGE
−40
+125
°C
1 Recommended range for optimal performance. Exceeding this range is not recommended.
ADA4433-1 SPECIFICATIONS
TA = 25°C, +VS = 3.3 V, V−IN = 0.5 V, RL = 150 Ω, unless otherwise specified.
Table 2.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
−3 dB Large Signal Bandwidth
VOUT = 0.2 V p-p
VOUT = 2 V p-p
ADA4433-1W only: TMIN to TMAX
VOUT = 2 V p-p
ADA4433-1W only: TMIN to TMAX
VOUT = 2 V p-p
9.9
9.9
MHz
MHz
MHz
MHz
MHz
MHz
dB
dB
%
Degrees
ns
dB
8.8
8.2
7.7
7.2
1 dB Flatness
8.7
0.1 dB Flatness
Out-of-Band Rejection
3
45
f = 27 MHz
41
39
ADA4433-1W only: TMIN to TMAX
Modulated 10-step ramp, sync tip at 0 V
Modulated 10-step ramp, sync tip at 0 V
f = 100 kHz to 5 MHz
Differential Gain
Differential Phase
Group Delay Variation
Pass Band Gain
0.5
1.7
8
5.89
5.71
6
6.15
6.28
ADA4433-1W only: TMIN to TMAX
dB
NOISE/HARMONIC PERFORMANCE
Signal-to-Noise Ratio
100% white signal, f = 100 kHz to 5 MHz
67
dB
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range
0 to 2.1 0 to 2.2
0 to 2.3
0 to 2.5
V
V
ADA4433-1W only: TMIN to TMAX
Differential
Common mode
0 to 2.0
800
400
1.8
Input Resistance
kΩ
kΩ
pF
pA
dB
Input Capacitance
Input Bias Current
CMRR
Common mode
30
−55
V−IN = V+IN = 0.1 V to 1.1 V
OUTPUT CHARACTERISTICS
Output Offset Voltage
V+IN = V−IN = 0 V
1.65
1.9
V
ADA4433-1W only: TMIN to TMAX
Each single-ended output, RL, dm = 150 Ω
ADA4433-1W only: TMIN to TMAX
1.9
+VS − 0.55
+VS – 0.6
V
V
V
mA
mA
dB
Output Voltage Swing
0.54
0.6
29
Linear Output Current
Short-Circuit Output Current
Output Balance Error
SHORT-TO-BATTERY
60
−50
DC to f = 100 kHz, VIN = 0.5 V p-p
Protection Range
+VS
+VS
5.0
4.9
18
18
5.7
6.0
V
V
V
V
ns
ns
ADA4433-1W only: TMIN to TMAX
Each output back termination = 37.5 Ω
ADA4433-1W only: TMIN to TMAX
After the fault is applied
STB Output Trigger Threshold
5.4
Disconnect Time
Reconnect Time
150
300
After the fault is removed
Rev. A | Page 4 of 28
Data Sheet
ADA4432-1/ADA4433-1
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
POWER SUPPLY
Power Supply Range1
Quiescent Current
2.6
3.6
18
19
22
30
V
No input signal, no load
ADA4433-1W only: TMIN to TMAX
ENA = 0 V
ADA4433-1W only: TMIN to TMAX
Short-to-battery fault condition: 18 V
13.2
13.5
mA
mA
µA
µA
mA
mA
dB
Quiescent Current, Disabled
Quiescent Current, Short-to-Battery
Quiescent Current, Short-to-Ground Short on far end of output termination (37.5 Ω)
PSRR
18
60
−80
Δ+VS RIPPLE
=
0.3 V, f = dc
ENABLE PIN
Input Leakage Current
ENA = high/low
+0.3/−14
µA
LOGIC OUTPUT/INPUT LEVELS
STB VOH
STB VOL
ENA VIH
ENA VIL
VOUT ≥ 5.7 V (fault condition)
VOUT ≤ 3 V (normal operation)
Input voltage to enable device
Input voltage to disable device
3.3
V
V
V
V
0.02
≥2.4
≤0.6
OPERATING TEMPERATURE RANGE
−40
+125
°C
1 Recommended range for optimal performance. Exceeding this range is not recommended.
Rev. A | Page 5 of 28
ADA4432-1/ADA4433-1
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 3.
The power dissipated in the package (PD) is the sum of the
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (VS) times the
quiescent current (IS). The power dissipated due to the load drive
depends on the particular application. For each output, the
power due to load drive is calculated by multiplying the load
current by the associated voltage drop across the device. The
power dissipated due to the loads is equal to the sum of the
power dissipations due to each individual load. RMS voltages
and currents must be used in these calculations.
Parameter
Rating
Supply Voltage
4 V
Output Common-Mode Voltage
Input Differential Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering, 10 sec)
Junction Temperature
22 V
+VS
See Figure 3
−65°C to +125°C
−40°C to +125°C
260°C
150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Airflow increases heat dissipation, effectively reducing θJA.
Figure 3 shows the maximum power dissipation in the package
vs. the ambient temperature for the 6-lead SOT-23 (170°C/W)
and the 8-lead LFCSP (50°C/W) on a JEDEC standard 4-layer
board. θJA values are approximate.
5
T
= 150°C
J
THERMAL RESISTANCE
4
3
2
1
θJA is specified for the device soldered to a high thermal
conductivity 4-layer (2s2p) circuit board, as described in
EIA/JESD 51-7.
LFCSP
Table 4.
Package Type
6-Lead SOT-23
8-Lead LFCSP
θJA
170
50
θJC
Unit
°C/W
°C/W
SOT-23
Not applicable
5
0
–40
MAXIMUM POWER DISSIPATION
–20
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (ºC)
The maximum safe power dissipation in the ADA4432-1 and
ADA4433-1 packages are limited by the associated rise in
junction temperature (TJ) on the die. At approximately 150°C,
which is the glass transition temperature, the plastic changes its
properties. Exceeding a junction temperature of 150°C for an
extended time can result in changes in the silicon devices,
potentially causing failure.
Figure 3. Maximum Power Dissipation vs.
Ambient Temperature for a 4-Layer Board
ESD CAUTION
Rev. A | Page 6 of 28
Data Sheet
ADA4432-1/ADA4433-1
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADA4432-1
ADA4432-1
NC
1
2
3
4
8
7
6
5
IN
IN
GND
NC
1
2
3
6
5
4
+V
S
ENA
GND
NC
STB
TOP VIEW
(Not to
Scale)
TOP VIEW
(Not to Scale)
ENA
OUT
+V
S
OUT
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PAD CAN BE CONNECTED
TO THE GROUND PLANE.
NOTES:
1. NC = NO CONNECT.
Figure 4. ADA4432-1 LFCSP Pin Configuration, Top View
Figure 5. ADA4432-1 SOT-23 Pin Configuration, Top View
Table 5. ADA4432-1 LFCSP Pin Function Descriptions
Table 6. ADA4432-1 SOT-23 Pin Function Descriptions
Pin
Pin
No. Mnemonic Description
No. Mnemonic Description
1
2
NC
STB
No Connect. Do not connect to this pin.
1
2
3
4
5
IN
GND
NC
OUT
ENA
Input.
Short-to-Battery Indicator Output. A logic
high indicates a short-to-battery condition,
and a logic low indicates normal operation.
Positive Power Supply. Bypass with 0.1 µF
capacitor to GND.
Amplifier Output.
No Connect. Do not connect to this pin.
Power Supply Ground Pin.
Power Supply Ground Pin.
No Connect. Do not connect to this pin.
Amplifier Output.
Enable Function. Connect to +VS or float for
normal operation; connect to GND for
device disable.
3
+VS
4
5
6
7
OUT
NC
GND
ENA
6
+VS
Positive Power Supply. Bypass with 0.1 µF
capacitor to GND.
Enable Function. Connect to +VS or float for
normal operation; connect to GND for
device disable.
8
IN
Input.
EPAD
The exposed pad can be connected to the
ground plane.
Rev. A | Page 7 of 28
ADA4432-1/ADA4433-1
Data Sheet
ADA4433-1
–IN
1
2
3
4
8
7
6
5
+IN
ENA
GND
–OUT
STB
TOP VIEW
(Not to
Scale)
+V
S
+OUT
NOTES
1. THE EXPOSED PAD CAN BE CONNECTED
TO THE GROUND PLANE.
Figure 6. ADA4433-1 LFCSP Pin Configuration, Top View
Table 7. ADA4433-1 LFCSP Pin Function Descriptions
Pin No.
Mnemonic Description
1
2
−IN
STB
Inverting Input.
Short-to-Battery Indicator Output. A logic high indicates a short-to-battery condition, and a logic low indicates
normal operation.
3
4
5
6
7
8
+VS
Positive Power Supply. Bypass with a 0.1 µF capacitor to GND.
Noninverting Output.
Inverting Output.
Ground.
Enable Function. Connect to +VS or float for normal operation; connect to GND for device disable.
Noninverting Input.
+OUT
−OUT
GND
ENA
+IN
EPAD
The exposed pad can be connected to the ground plane.
Rev. A | Page 8 of 28
Data Sheet
ADA4432-1/ADA4433-1
TYPICAL PERFORMANCE CHARACTERISTICS
ADA4432-1 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, +VS = 3.3 V, RL = 150 Ω, unless otherwise specified.
12
6
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
V
= 0.2V p-p
OUT
V
= 0.2V p-p
0
–6
OUT
V
= 2.0V p-p
OUT
V
= 2.0V p-p
OUT
–12
–18
–24
–30
–36
–42
–48
–54
–60
–66
0.1
1
10
FREQUENCY (MHz)
100
0.1
1
10
FREQUENCY (MHz)
100
Figure 7. Frequency Response at Various Output Amplitudes
Figure 10. 1 dB Flatness Response at Various Output Amplitudes
12
6
6.5
V
= 2.0V p-p
V
= 2.0V p-p
OUT
OUT
6.0
5.5
5.0
4.5
4.0
3.5
3.0
0
–40°C
–6
+125°C
+25°C
–12
–18
–24
–30
–36
–42
–48
–54
–60
–66
+125°C
–40°C
+25°C
0.1
1
10
FREQUENCY (MHz)
100
0.1
1
10
FREQUENCY (MHz)
100
Figure 8. Large Signal Frequency Response at Various Temperatures
Figure 11. 1 dB Flatness Response at Various Temperatures
7.0
100
V
= 2.0V p-p
OUT
R
= 75Ω
LOAD
90
80
70
60
50
40
30
20
10
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
R
= 100Ω
LOAD
R
= 150Ω
LOAD
0.1
1
10
0.1
1
10
FREQUENCY (MHz)
100
FREQUENCY (MHz)
Figure 9. 1 dB Flatness Response at Various Load Resistances
Figure 12. Group Delay vs. Frequency
Rev. A | Page 9 of 28
ADA4432-1/ADA4433-1
Data Sheet
1.5
1.5
1.0
f = 3.58MHz
f = 3.58MHz
1.0
0.5
0.5
0
0
–0.5
–1.0
–1.5
–0.5
–1.0
–1.5
0
1
2
3
4
5
6
7
8
9
10
11
0
1
2
3
4
5
6
7
8
9
10
11
Figure 13. Differential Gain Plot
Figure 16. Differential Phase Plot
6.05
60
50
40
30
20
10
0
6.04
6.03
6.02
6.01
6.00
5.99
5.98
5.97
5.96
5.95
–40
–20
0
20
40
60
80
100
120
0
0.01
0.02
0.03
0.04
0.05
OUTPUT OFFSET DRIFT (V)
TEMPERATURE (°C)
Figure 14. DC Pass Band Gain Drift (−40°C to +125°C)
Figure 17. Total Output Offset Voltage Drift (−40°C to +125°C)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
12
V
ENA
10
+125°C
+25°C
–40°C
8
V
OUT
6
4
2
0
–0.5
–1.0
–200
0
200 400 600 800 1000 1200 1400 1600 1800
TIME (ns)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
ENABLE VOLTAGE (V)
Figure 18. Supply Current vs. Enable Voltage at Various Temperatures
Figure 15 Enable (ENA)/Disable Time
Rev. A | Page 10 of 28
Data Sheet
ADA4432-1/ADA4433-1
13
12
11
10
9
4
3
2
1
0
STB OUTPUT
RESET POINT
OVER
VOLTAGE
PULSE
8
STB OUTPUT
TRIGGER POINT
7
6
5
4
STB OUTPUT
V
OUT
3
2
1
0
–1
0
200
400
600
800
1000
1200
1400
1600
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
TIME (ns)
SHORT-TO-BATTERY (V)
Figure 19. STB Output Flag Response Time
Figure 22. STB Output Response vs. Short-to-Battery Voltage on Outputs
11
0
REFFERED TO OUTPUT
–10
10
9
SOT-23
–20
LFCSP
–30
8
–40
–50
–60
7
6
–40
–20
0
20
40
60
80
100
120
0.1
1
10
FREQUENCY (MHz)
100
TEMPERATURE (°C)
Figure 20. Supply Current vs. Temperature
Figure 23. Power Supply Rejection Ratio (PSRR) vs. Frequency
3.3
–40
V
= 1.0V p-p
IN
–50
–60
2.7
2.1
LFCSP
SOT-23
–70
–80
1.5
–90
0.9
–100
–110
–120
–130
0.3
–0.3
0
100 200 300 400 500 600 700 800 900 1000
TIME (ns)
0.1
1
10
FREQUENCY (MHz)
100
Figure 21. Output Transient Response
Figure 24. Input-to-Output Off (Disabled) Isolation vs. Frequency
Rev. A | Page 11 of 28
ADA4432-1/ADA4433-1
Data Sheet
ADA4433-1 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, +VS = 3.3 V, V−IN = 0.5 V, RL = 150 Ω, unless otherwise specified.
12
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
V
= 0.2V p-p
OUT
6
0
V
= 0.2V p-p
OUT
V
= 2.0V p-p
OUT
–6
–12
–18
–24
–30
–36
–42
–48
–54
–60
–66
V
= 2.0V p-p
OUT
0.1
1
10
FREQUENCY (MHz)
100
0.1
1
10
100
FREQUENCY (MHz)
Figure 25. Frequency Response at Various Output Amplitudes
Figure 28. 1 dB Flatness Response at Various Output Amplitudes
12
6.5
V
= 2.0V p-p
V
= 2.0V p-p
OUT
OUT
6
0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
–6
–12
–18
–24
–30
–36
–42
–48
–54
–60
–66
+125°C
+25°C
–40°C
–40°C
+25°C
+125°C
0.1
1
10
FREQUENCY (MHz)
100
0.1
1
10
FREQUENCY (MHz)
100
Figure 26. Large Signal Frequency Response at Various Temperatures
Figure 29. 1 dB Flatness Response at Various Temperatures
7.0
100
V
= 2.0V p-p
OUT
R
= 75Ω
LOAD
90
80
70
60
50
40
30
20
10
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
R
= 100Ω
LOAD
R
= 150Ω
LOAD
0.1
1
10
0.1
1
10
FREQUENCY (MHz)
100
FREQUENCY (MHz)
Figure 27. 1 dB Flatness Response at Various Load Resistances
Figure 30. Group Delay vs. Frequency
Rev. A | Page 12 of 28
Data Sheet
ADA4432-1/ADA4433-1
1.5
1.5
1.0
f = 3.58MHz
f = 3.58MHz
1.0
0.5
0.5
0
0
–0.5
–1.0
–1.5
–0.5
–1.0
–1.5
0
1
2
3
4
5
6
7
8
9
10
11
0
1
2
3
4
5
6
7
8
9
10
11
Figure 31. Differential Gain Plot
Figure 34. Differential Phase Plot
–25
–30
–35
–40
–45
–50
–55
–60
N = 300
50
40
30
20
10
0
V
= 2.0V p-p
OUT
–0.04
–0.02
0
0.02
0.04
0.1
1
6
OUTPUT COMMON-MODE OFFSET DRIFT (V)
FREQUENCY (MHz)
Figure 32. Output Balance Error vs. Frequency
Figure 35. Total Output Common-Mode Offset Voltage Drift
(−40°C to +125°C)
18
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
ENA
16
+125°C
14
12
10
8
+25°C
–40°C
+V
OUT
–V
OUT
6
4
2
–0.5
0
–1.0
–200
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
0
200 400 600 800 1000 1200 1400 1600 1800
TIME (ns)
ENABLE VOLTAGE (V)
Figure 33. Enable (ENA)/Disable Time
Figure 36. Supply Current vs. Enable Voltage at Various Temperatures
Rev. A | Page 13 of 28
ADA4432-1/ADA4433-1
Data Sheet
13
4
3
2
1
0
12
STB OUTPUT
RESET POINT
OVER
VOLTAGE
11
PULSE
10
9
8
7
6
STB OUTPUT
TRIGGER POINT
5
STB
OUTPUT
4
3
+V
OUT
2
1
–V
OUT
0
–1
0
200
400
600
800
1000
1200
1400
1600
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
TIME (ns)
SHORT-TO-BATTERY (V)
Figure 40. STB Output Response vs. Short-to-Battery Voltage on Outputs
Figure 37. STB Output Flag Response Time
16
0
REFERRED TO OUTPUT
–10
–20
–30
–40
–50
–60
–70
–80
15
14
13
12
11
0.1
1
10
FREQUENCY (MHz)
100
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 41. Power Supply Rejection Ratio (PSRR) vs. Frequency
Figure 38. Supply Current vs. Temperature
3.0
–50
V
= 1.0V p-p
IN
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
–60
–70
–80
–90
–100
0
100
200
300
400
500
600
700
800
0.1
1
10
FREQUENCY (MHz)
100
TIME (ns)
Figure 39. Output Transient Response
Figure 42. Input-to-Output Off (Disabled) Isolation vs. Frequency
Rev. A | Page 14 of 28
Data Sheet
ADA4432-1/ADA4433-1
THEORY OF OPERATION
The ADA4432-1 and ADA4433-1 can withstand voltages of up
to 18 V on the outputs. Critical internal nodes are protected from
exposure to high voltages by circuitry that isolates the output
devices from the high voltage and limits internal currents. This
protection is available whether the device is enabled or disabled,
even when the supply voltage is removed.
The ADA4432-1 and ADA4433-1 with short-to-battery and
short-to-ground protection are designed as fifth-order, low-pass
filters with a fixed gain of 2 that is capable of driving 2 V p-p video
signals into doubly terminated video transmission lines on a single
supply as low as 2.6 V. The filter has a 1 dB flatness of 9 MHz
and provides a typical out-of-band rejection of 45 dB at 27 MHz.
The output devices are disconnected when the voltage at the
output pins exceeds the supply voltage. After the overvoltage
condition is removed, internal circuitry pulls the output voltage
back within normal operating levels. The output devices are
reconnected when the voltage at the output pins falls below the
supply voltage by about 300 mV. When the devices are used with a
doubly terminated cable, the voltage sensed at the output pins is
lower than the voltage applied to the cable by the voltage drop
across the back termination resistor. The maximum voltage drop
across the back termination resistor is limited by the short-circuit
current protection; therefore, the threshold at which the over-
voltage protection responds to a voltage applied to the cable is
The ADA4432-1 is a single-ended filter/driver that can be used
with both ac- and dc-coupled inputs and outputs, with an input
range that includes ground for use with a ground referenced
digital-to-analog converter (DAC) in a single-supply application.
To ensure accurate reproduction of ground referenced signals
without saturating the output devices, an internal offset is
added to shift the output voltage up by 200 mV.
The ADA4433-1 is a fully differential filter/driver that is also
designed for compliance with both ac- and dc-coupled inputs and
outputs. The ADA4433-1 can be driven by a differential or single-
ended source and provides a fully differential output signal that
is biased at a voltage equal to half the supply voltage (+VS/2). When
the device is used with a single-ended input source, bias the
inverting input, −IN, at the middle of the input voltage range
applied to the noninverting input, +IN, allowing each output
signal to swing equally around the midsupply point (see the
Configuring the ADA4433-1 for Single-Ended Input Signals
section). This is particularly important to maximize output
voltage headroom in low supply voltage applications.
V
THRESH (CABLE) = +VS + ILIMITRT
where:
VTHRESH (CABLE) is the voltage applied to the cable that activates the
internal isolation circuitry.
+VS is the positive supply voltage.
I
R
LIMIT is the internal short-circuit current limit, typically 50 mA.
T the back termination resistance.
If the voltage applied to the cable is lower than VTHRESH (CABLE), the
voltage seen at the output pins is lower than the supply voltage,
so no overvoltage condition is detected. However, the internal
circuitry is protected by the short circuit current limit; therefore,
the ADA4432-1/ADA4433-1 can withstand an indefinite duration
short to any positive voltage up to 18 V without damage.
SHORT CIRCUIT (SHORT-TO-GROUND) PROTECTION
Both the ADA4432-1 and ADA4433-1 include internal protection
circuits that limit the output sink or source current to 60 mA.
This short circuit protection prevents damage to the ADA4432-1
and ADA4433-1 when the output(s) are shorted to ground, to a
low impedance source, or together (in the case of the ADA4433-1)
for an extended time. In addition, in the case of the ADA4433-1,
the total sink or source current for both outputs is limited to
50 mA, which helps protect the device in the event of both outputs
being shorted to a low impedance. However, short circuit
protection does not affect the normal operation of the devices
because one output sources current, whereas the other output
sinks current when driving a differential output signal.
SHORT-TO-BATTERY OUTPUT FLAG
In addition to the internal protection circuitry, the short-to-
battery output flag (STB pin) indicates an overvoltage condition
on either or both output pins. The flag is present whenever the
internal overvoltage protection is active; therefore, it is available
when the device is enabled or disabled. It is not available, however,
when the supply voltage is removed, although the internal
protection is still active. The threshold at which the short-to-
battery flag is activated and deactivated is the same as the
threshold for the protection circuitry.
OVERVOLTAGE (SHORT-TO-BATTERY) PROTECTION
Both the ADA4432-1 and ADA4433-1 include internal protection
circuits to ensure that internal circuitry is not subjected to
extreme voltages or currents during an overvoltage event
applied to their outputs. A short-to-battery condition usually
consists of a voltage on the outputs that is significantly higher
than the power supply voltage of the amplifier. Duration can
vary from a short transient to a continuous fault.
Table 8. STB Pin Logic
STB Pin Output
High (Logic 1)
Low (Logic 0)
Device State
Overvoltage fault condition
Normal operation
Rev. A | Page 15 of 28
ADA4432-1/ADA4433-1
Data Sheet
Table 9. ENA Pin Function
ENA Pin Input
ESD PROTECTION
Device State
All pins on the ADA4432-1 and ADA4433-1 are protected with
internal ESD protection structures connected to the power supply
pins (+VS and GND). These structures provide protection during
the handling and manufacturing process.
High (Logic 1)
Low (Logic 0)
High-Z (Floating)
Enabled
Disabled
Enabled
The outputs (OUT for the ADA4432-1 and +OUT and −OUT
for the ADA4433-1) can be exposed to dc voltages well above the
supply voltage in an overvoltage event; therefore, conventional
ESD structure protection cannot be used. Instead, the outputs
are protected by Analog Devices proprietary ESD devices, which
allow protection and recovery from an overvoltage event while
providing ESD protection well beyond the handling and
manufacturing requirements.
OPERATING SUPPLY VOLTAGE RANGE
The ADA4432-1 and ADA4433-1 are specified over an operating
supply voltage range of 2.6 V to 3.6 V. This range establishes the
nominal utilization voltage at which the devices perform in
conformance with their specifications. The operating supply
voltage refers to sustained voltage levels and not to a momentary
voltage excursion that can occur due to variation in the output of
the supply regulator. When the devices operate at the limits of the
operating supply voltage range (2.6 V to 3.6 V), excursions that are
outside of this range, but less than the absolute maximum, can
lead to some performance degradation; however, they do not
damage the device.
The outputs of the ADA4432-1 and ADA4433-1 are ESD
protected to survive 8 kV and 6 kV human body model
(HBM), respectively.
ENABLE/DISABLE MODES (ENA PIN)
The power-down or enable/disable (ENA) pin is internally pulled
up to +VS through a 250 kΩ resistor. When the voltage on this
pin is high, the amplifier is enabled; pulling ENA low disables
the ADA4432-1 and ADA4433-1, reducing the supply current
to a very low 13.5 µA. With no external connection, this pin
floats high, enabling the amplifier.
Rev. A | Page 16 of 28
Data Sheet
ADA4432-1/ADA4433-1
APPLICATIONS INFORMATION
Fully Differential Mode
METHODS OF TRANSMISSION
The ADA4433-1 is designed to be used as a fully differential driver.
The differential outputs of the ADA4433-1 allow fully balanced
transmission using twisted or untwisted pair cable. In this
configuration, the differential output termination consists of two
source resistors, one on each output, and each equal to half the
receiver input termination. For example, in a 75 Ω system, each
output of the ADA4433-1 is back terminated with 37.5 Ω resistors
that are connected to a differential resistance of 75 Ω at the receiver.
An illustration of this arrangement is shown in Figure 45.
Pseudo Differential Mode (Unbalanced Source
Termination)
The ADA4432-1 can be used as a pseudo differential driver
with an unbalanced transmission line. Pseudo differential mode
uses a single conductor to carry an unbalanced data signal from
the driver to the receiver, while a second conductor is used as a
ground reference signal.
The positive conductor connects the ADA4432-1 output to the
positive input of a differential receiver, such as ADA4830-1. The
negative wire or ground conductor from the source circuitry
connects to the negative input of the receiver. Match the impedance
of the input termination at the receiver to the output termination
of the ADA4432-1 (see Figure 43).
DRIVER PCB
POSITIVE WIRE
37.5Ω
37.5Ω
INP
75Ω
INN
+
ADA4433-1
ADA4830-1
−
DRIVER PCB
NEGATIVE WIRE
POSITIVE WIRE
75Ω
INP
75Ω
INN
+
Figure 45. Fully Differential Mode
ADA4432-1
ADA4830-1
PRINTED CIRCUIT BOARD (PCB) LAYOUT
−
NEGATIVE WIRE
As with all high speed applications, attention to PCB layout is of
paramount importance. Adhere to standard high speed layout
practices when designing with the ADA4432-1 and ADA4433-1.
A solid ground plane is recommended. Place a 0.1 µF surface-
mount, ceramic power supply decoupling capacitor as close as
possible to the supply pin.
Figure 43. Pseudo Differential Mode
Pseudo Differential Mode (Balanced Source Impedance)
Pseudo differential signaling is typically implemented using
unbalanced source termination, as shown in Figure 43. With this
arrangement, however, common-mode signals on the positive
and negative inputs receive different attenuation due to unbalanced
termination at the source. This effectively converts some of the
common-mode signal into a differential mode signal, degrading
the overall common-mode rejection of the system. System
common-mode rejection can be improved by balancing the output
impedance of the driver, as shown in Figure 44. Splitting the source
termination resistance evenly between the hot and cold conductors
results in matched attenuation of the common-mode signals,
ensuring maximum rejection.
Connect the GND pin(s) to the ground plane with a trace that is
as short as possible. Use controlled impedance traces of the shortest
length possible to connect to the signal I/O pins and do not run the
traces over any voids in the ground plane. A 75 Ω impedance level
is typically used in video applications. All signal outputs of the
ADA4432-1 and ADA4433-1 should include series termination
resistors when driving transmission lines.
When the ADA4432-1 or the ADA4433-1 receives its inputs from a
device with current outputs, the required load resistor value for
the output current is most often different from the characteristic
impedance of the signal traces. In this case, if the interconnections
are sufficiently short (less than 2 inches), the trace does not
need to be terminated in its characteristic impedance.
DRIVER PCB
POSITIVE WIRE
37.5Ω
INP
75Ω
INN
+
ADA4432-1
ADA4830-1
37.5Ω
−
NEGATIVE WIRE
Figure 44. Pseudo Differential Mode with Balanced Source Impedance
Rev. A | Page 17 of 28
ADA4432-1/ADA4433-1
Data Sheet
strictly positive, where each output swings only above V+OUT or
below V−OUT, the midsupply VOCM level. Directly at the output of the
ADA4433-1, the output voltage extends from 0.65 V to 2.65 V,
requiring a full 2 V of output to produce a 1 V p-p signal at the
receiver (represented by the voltage across 2R).
CONFIGURING THE ADA4433-1 FOR SINGLE-
ENDED INPUT SIGNALS
The ADA4433-1 is a fully differential filter/driver that can be
used as a single-ended-to-differential amplifier or as a differential-
to-differential amplifier. In single-ended-to-differential output
applications, bias the −IN input appropriately to optimize the
output range. To make the most efficient use of the output range
of the ADA4433-1, especially with low supply voltages, it is
important to allow the differential output voltage to swing in
both a positive and negative direction around the output common-
mode voltage (VOCM) level, the midsupply point. To do this, the
differential input voltage must swing both positive and negative.
Figure 46 shows a 1 V p-p single-ended signal on +IN with −IN
grounded. This produces a differential input voltage that ranges
from 0 V to 1 V. The resulting differential output voltage is
To make a more efficient use of the output range, the −IN input is
biased at the midpoint of the expected input signal range, as shown
in Figure 47. A 1 V p-p single-ended signal on +IN, with −IN
biased at 0.5 V, produces a differential input voltage that ranges
from −0.5 V to +0.5 V. The resulting differential output voltage
now contains both positive and negative components, where
each output swings both above and below the midsupply VOCM
level. Directly at the output of the ADA4433-1, the output
voltage now extends only from 1.15 V to 2.15 V, requiring only
1 V of the output to produce a 1 V p-p signal at the receiver.
INPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL ACROSS 2R
2.65V
V
+OUT
1V p-p
ADA4433-1
1.0V
0V
R
2R
+
V
–
V
V
+IN
V
1.65V
=
OCM
1V p-p
OUT
R
V
–IN
–OUT
0.65V
– V
V
(IN) = V
– V
V
(OUT) = V
V
= V
(OUT) ÷ 2
DIFF
+IN
–IN
DIFF
+OUT
–OUT
OUT
DIFF
Figure 46. Single-Ended-to-Differential Configuration with Negative Input (−IN) Connected to Ground
INPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL
DIFFERENTIAL OUTPUT SIGNAL ACROSS 2R
V
+OUT
ADA4433-1
2.15V
1.15V
1.0V
R
V
V
+
–IN
V
1.65V
=
OCM
1V p-p
1V p-p
V
2R
OUT
0.5V
0V
–
R
V
+IN
–OUT
V
(IN) = V
– V
V
(OUT) = V
– V
V
= V
(OUT) ÷ 2
DIFF
+IN
–IN
DIFF
+OUT
–OUT
OUT
DIFF
Figure 47. Single-Ended-to-Differential Configuration with Negative Input (−IN) Connected to 0.5 V
Rev. A | Page 18 of 28
Data Sheet
ADA4432-1/ADA4433-1
Example Configuration for Package-Compatible PCB
PIN-COMPATIBLE ADA4432-1 AND ADA4433-1
The single-ended output with the ADA4432-1 includes the following:
The ADA4432-1 and ADA4433-1 are single-ended output and
differential output, respectively, short-to-battery protected video
filters for automotive applications. Each version shares a common
package, the 8-lead LFSCP, which allows them to share a common
pinout and footprint. This allows a designer to change from a
single-ended output configuration to a differential output on
the same PCB with only minimal change to the external resistor
values and placements. Figure 48 and Figure 50 show the pin
configuration of the ADA4432-1 and ADA4433-1 in 8-lead
LFCSP packages. Figure 49 and Figure 51 show an example
schematic configured for the ADA4432-1 and the ADA4433-1,
respectively.
•
•
•
•
•
R1 matches the requirement for the source.
R2, R3, and R6 are not installed.
C3 is not installed.
R5 is chosen to match the receiver termination impedance.
R8 is 0 Ω to provide ground reference.
The differential output with the ADA4433-1 includes the following:
•
•
•
•
R1 matches the requirement for the source.
R2 and R3 are chosen to provide the correct bias for −IN.
C3 is for the −IN bypass.
R5 and R6 are chosen to match the receiver termination
impedance.
•
R8 is not installed.
ADA4432-1
ADA4433-1
NC
1
2
3
4
8
7
6
5
IN
–IN
1
2
3
4
8
7
6
5
+IN
ENA
GND
NC
ENA
GND
–OUT
STB
STB
TOP VIEW
(Not to
Scale)
TOP VIEW
(Not to
Scale)
+V
+V
S
S
OUT
+OUT
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PAD MAY BE CONNECTED
TO THE GROUND PLANE.
NOTES
1. THE EXPOSED PAD MAY BE CONNECTED
TO THE GROUND PLANE.
Figure 48. 8-Lead LFCSP Package Pin Configuration, ADA4432-1
Figure 50. 8-Lead LFCSP Package Pin Configuration, ADA4433-1
ENA
ENA
R6
DNI
R6
37.5Ω
GROUND
REFERENCE
CONDUCTOR
NEGATIVE
OUTPUT
VIDEO
INPUT
VIDEO
INPUT
CONDUCTOR
R8
0Ω
R8
DNI
R1
75Ω
8
7
6
5
R1
75Ω
8
7
6
5
IN ENA GND NC
+IN ENA GND –OUT
ADA4432-1
ADA4433-1
+V
+V
S
S
NC STB +V
OUT
4
–IN STB +V +OUT
S
S
R3
DNI
R3
7.5kΩ
1
2
3
1
2
3
4
R5
75Ω
R5
37.5Ω
POSITIVE
OUTPUT
POSITIVE
OUTPUT
CONDUCTOR
CONDUCTOR
C3
DNI
R2
DNI
C3
0.1µF
R2
1.33kΩ
+V
S
+V
S
C1
2.2µF
C2
0.1µF
C1
C2
0.1µF
2.2µF
STB
STB
Figure 49. Example Compatible Schematic Configured for the ADA4432-1
Figure 51. Example Compatible Schematic Configured for the ADA4433-1
Rev. A | Page 19 of 28
ADA4432-1/ADA4433-1
Data Sheet
TYPICAL APPLICATION CIRCUITS
VDD_IO
33µF
10µF
0.1µF
100nF
GND_IO
GND_IO
GND_IO
GND_IO
PVDD
VAA
33µF
10µF
0.1µF
100nF
PGND
PGND
PGND
PGND
33µF
10µF
0.1µF
100nF
AGND
1µF
AGND
AGND
AGND
AGND
VDD
33µF
10µF
0.1µF
100nF
DGND
DGND
DGND
DGND
ENABLE
(INPUT)
STB FLAG
(OUTPUT)
VAA
P0
P1
P2
P3
P4
P5
P6
P7
COMP
RSET
2.2µF
0.1µF
AGND
PIXEL PORT
INPUTS
AGND
+V
4.12kΩ
2.2nF
ADV7391/
ADV7393
ENA
S
STB
AGND
P8
P9
P10
VOUT
IN
75Ω
DAC1
DAC2
DAC3
STB
75Ω
P11 (ADV7393 ONLY)
PIXEL PORT
INPUTS
TWISTED
PAIR
300Ω
P12
P13
P14
P15
AGND
SOT-23 PACKAGE
ADA4432-1
GND
HSYNC
VSYNC
CONTROL
INPUTS/OUTPUTS
AGND
CLOCK INPUT
I2C PORT
CLKIN
SDA
SCL
ALSB
DGND
RESET
PVDD
EXT_LF
12nF
AGND PGND DGND DGND GND_IO
150nF 170Ω
AGND PGND DGND DGND GND_IO
EXTERNAL LOOP
FILTER
(OPTIONAL)
Figure 52. ADA4432-1 and ADV7391/ADV7393 Video Encoder Application Circuit
Rev. A | Page 20 of 28
Data Sheet
ADA4432-1/ADA4433-1
VDD_IO
33µF
10µF
0.1µF
100nF
GND_IO
PVDD
GND_IO
GND_IO
GND_IO
33µF
10µF
0.1µF
100nF
PGND
PGND
VAA
PGND
PGND
33µF
10µF
0.1µF
100nF
AGND
1µF
AGND
VDD
AGND
AGND
AGND
33µF
10µF
0.1µF
100nF
DGND
DGND
DGND
DGND
ENABLE
(INPUT)
STB FLAG
(OUTPUT)
VAA
P0
P1
P2
P3
P4
P5
P6
P7
COMP
2.2µF
0.1µF
AGND
PIXEL PORT
INPUTS
R
SET
AGND
+V
4.12kΩ
2.2nF
ADV7391/
ADV7393
ENA
STB
S
AGND
P8
P9
P10
+IN
DAC 1
DAC 2
DAC 3
P11 (ADV7393 ONLY)
–OUT
+OUT
PIXEL PORT
INPUTS
VAA
7.5kΩ
37.5Ω
37.5Ω
300Ω
STB
STB
P12
P13
P14
P15
75Ω
TWISTED
PAIR
AGND
–IN
HSYNC
VSYNC
CONTROL
INPUTS/OUTPUTS
1.33kΩ
0.1µF
ADA4433-1
GND
CLOCK INPUT
CLKIN
AGND
SDA
SCL
ALSB
2
I C PORT
AGND
DGND
RESET
PVDD
EXT_LF
12nF
AGND PGND DGND DGND GND_IO
150nF 170Ω
AGND PGND DGND DGND GND_IO
EXTERNAL LOOP
FILTER
(OPTIONAL)
Figure 53. ADA4433-1 and ADV7391/ADV7393 Video Encoder Application Circuit
Rev. A | Page 21 of 28
ADA4432-1/ADA4433-1
Data Sheet
levels at the transmitter and receiver is within the common-mode
range of the receiver, very little current flow results, and no image
degradation is anticipated.
FULLY DC-COUPLED TRANSMISSION LINE
The ADA4432-1and ADA4433-1 are designed to be used with
high common-mode rejection, high input impedance receivers
such as the ADA4830-1, ADA4830-2, or other generic receivers.
Figure 54 and Figure 55 show an example configuration of a
completely dc-coupled transmission using the ADA4432-1 and
the ADA4433-1 along with a high input impedance differential
receiver.
The very low output impedance of the ADA4432-1 and the
ADA4433-1 allow them to be used in fully dc-coupled transmission
line applications in which there may be a significant discrepancy
between voltage levels at the ground pins of the driver and
receiver. As long as the voltage difference between reference
STB FLAG
(OUTPUT)
+V
(5.0V)
S
ENABLE
(INPUT)
4.99kΩ
ENABLE
(INPUT)
+V
(3.3V)
S
+
2.2µF
ENA
+VS
0.1µF
STB FLAG
(OUTPUT)
+VS
STB
2.2µF
0.1µF
VREF
4.7µF
ENA
+V
STB
S
FROM
75Ω
TWISTED
PAIR
IMAGER
OR VIDEO
ENCODER
OUT
IN
T
75Ω
INP
−
+
TO VIDEO
DECODER
STB
VOUT
0.1µF
75Ω
INN
R
+
−
ADA4432-1
LFCSP PACKAGE
ADA4830-1
GND
GND
Figure 54. ADA4432-1 Video Filter and the ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
STB FLAG
(OUTPUT)
+V
(5.0V)
S
ENABLE
(INPUT)
4.99kΩ
ENABLE
(INPUT)
+V
(3.3V)
STB FLAG
(OUTPUT)
S
+
2.2µF
ENA
+VS
0.1µF
+
+VS
STB
2.2µF
ENA
0.1µF
+V
STB
S
FROM
IMAGER
ADA4433-1
VREF
4.7µF
OR VIDEO
ENCODER
75Ω
TWISTED
PAIR
+IN
TO
VIDEO
LPF
–OUT
+OUT
37.5Ω
37.5Ω
INP
DECODER
−
+
R
T
VOUT
75Ω
INN
0.1µF
+
−
+V
S
–IN
ADA4830-1
LPF
7.5kΩ
GND
GND
1.33kΩ
0.1µF
Figure 55. ADA4433-1 Video Filter and ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
Rev. A | Page 22 of 28
Data Sheet
ADA4432-1/ADA4433-1
For more detailed information on low drive mode, see the
ADV7391 data sheet.
LOW POWER CONSIDERATIONS
Using a series source termination and a shunt load termination on
a low supply voltage with the ADA4432-1 or ADA4433-1 realizes
significant power savings compared with driving a video cable
directly from a DAC output. Figure 56 shows a video DAC
driving a cable directly. Properly terminated, a DAC driven
transmission line requires two 75 Ω loads in parallel, demanding
in excess of 33 mA to reach a full-scale voltage level of 1.3 V.
Figure 57 shows the same video load being driven using the
ADA4432-1 and a series-shunt termination. This requires two
times the output voltage to drive the equivalent of 150 Ω but
only requires a little more than 15 mA to reach a full-scale output.
When running on the same supply voltage as the DAC, this result
in a 74% reduction in power consumption compared with the
circuit in Figure 56. The high order filtering provided by the
ADA4432-1 lowers the requirements on the DAC oversampling
ratio, realizing further power savings. The main source for power
savings realized by the configuration shown in Figure 57 comes
from the low drive mode setting for the ADV7391. This along
with the reduction in the requirement for oversampling (PLL
turned off), and the reduced load current required, results in
significant power savings.
3.3V
ADV7391
75Ω CABLE
R
SET
75Ω
510Ω
75Ω
Figure 56. Driving a Video Transmission Line Directly with a DAC
3.3V
3.3V
75Ω
ADV7391
ADA4432-1
75Ω CABLE
R
SET
300Ω
4.12kΩ
75Ω
Figure 57. Driving a Video Transmission Line with the ADA4432-1
Rev. A | Page 23 of 28
ADA4432-1/ADA4433-1
OUTLINE DIMENSIONS
Data Sheet
2.44
2.34
2.24
3.10
3.00 SQ
2.90
0.50 BSC
8
5
PIN 1 INDEX
AREA
EXPOSED
PAD
1.70
1.60
1.50
0.50
0.40
0.30
4
1
PIN 1
INDICATOR
(R 0.15)
TOP VIEW
BOTTOM VIEW
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
0.80
0.75
0.70
0.05 MAX
0.02 NOM
COPLANARITY
0.08
SECTION OF THIS DATA SHEET.
SEATING
PLANE
0.30
0.25
0.20
0.203 REF
COMPLIANT TOJEDEC STANDARDS MO-229-WEED
Figure 58. 8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
3 mm × 3 mm Body, Very Very Thin, Dual Lead
(CP-8-11)
Dimensions shown in millimeters
3.00
2.90
2.80
6
1
5
2
4
3
3.00
2.80
2.60
1.70
1.60
1.50
PIN 1
INDICATOR
0.95 BSC
1.90
BSC
1.30
1.15
0.90
0.20 MAX
0.08 MIN
1.45 MAX
0.95 MIN
0.55
0.45
0.35
0.15 MAX
0.05 MIN
10°
4°
0°
SEATING
PLANE
0.60
BSC
0.50 MAX
0.30 MIN
COMPLIANT TO JEDEC STANDARDS MO-178-AB
Figure 59. 6-Lead Small Outline Transistor Package [SOT-23]
(RJ-6)
Dimensions shown in millimeters
Rev. A | Page 24 of 28
Data Sheet
ADA4432-1/ADA4433-1
ORDERING GUIDE
Temperature
Range
Package
Option
Ordering
Branding Quantity
Model1, 2
Package Description
ADA4432-1BRJZ-R2
ADA4432-1BRJZ-R7
ADA4432-1WBRJZ-R7
ADA4432-1BRJ-EBZ
ADA4432-1BCPZ-R2
ADA4432-1BCPZ-R7
ADA4432-1WBCPZ-R7
ADA4432-1BCP-EBZ
ADA4433-1BCPZ-R2
ADA4433-1BCPZ-R7
ADA4433-1WBCPZ-R7
ADA4433-1BCP-EBZ
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
6-Lead Small Outline Transistor Package [SOT-23]
6-Lead Small Outline Transistor Package [SOT-23]
6-Lead Small Outline Transistor Package [SOT-23]
SOT-23 Evaluation Board
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
LFCSP_WD Evaluation Board
RJ-6
RJ-6
RJ-6
322
322
323
250
3000
3000
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
CP-8-11
CP-8-11
CP-8-11
321
321
H33
250
1500
1500
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
Evaluation Board
CP-8-11
CP-8-11
CP-8-11
331
331
H2Z
250
1500
1500
1 Z = RoHS Compliant Part.
2 W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The ADA4432-1W and ADA4433-1W models are available with controlled manufacturing to support the quality and reliability
requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial
models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products
shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product
ordering information and to obtain the specific Automotive Reliability reports for these models.
Rev. A | Page 25 of 28
ADA4432-1/ADA4433-1
NOTES
Data Sheet
Rev. A | Page 26 of 28
Data Sheet
NOTES
ADA4432-1/ADA4433-1
Rev. A | Page 27 of 28
ADA4432-1/ADA4433-1
NOTES
Data Sheet
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10597-0-5/12(A)
Rev. A | Page 28 of 28
相关型号：
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