LMH6720MFX/NOPB [TI]
具有关断状态的单路宽带视频运算放大器 | DBV | 6 | -40 to 85;
| 型号： | LMH6720MFX/NOPB |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 具有关断状态的单路宽带视频运算放大器 | DBV | 6 | -40 to 85 放大器 运算放大器 |
| 文件： | 总29页 (文件大小：1419K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
LMH6714/ LMH6720/ LMH6722/ LMH6722Q Wideband Video Op Amp; Single, Single with
Shutdown and Quad
Check for Samples: LMH6714, LMH6720, LMH6722, LMH6722-Q1
1
FEATURES
DESCRIPTION
The LMH6714/LMH6720/LMH6722 series combine
Texas Instruments' VIP10 high speed complementary
bipolar process with Texas Instruments' current
feedback topology to produce a very high speed op
amp. These amplifiers provide a 400MHz small signal
bandwidth at a gain of +2V/V and a 1800V/μs slew
rate while consuming only 5.6mA from ±5V supplies.
2
•
400MHz (AV = +2V/V, VOUT = 500mVPP) −3dB
BW
•
•
•
•
•
250MHz (AV = +2V/V, VOUT = 2VPP) -3dB BW
0.1dB Gain Flatness to 120MHz
Low Power: 5.6mA
TTL Compatible Shutdown Pin (LMH6720)
The LMH6714/LMH6720/LMH6722 series offer
exceptional video performance with its 0.01% and
0.01° differential gain and phase errors for NTSC and
PAL video signals while driving a back terminated
75Ω load. They also offer a flat gain response of
0.1dB to 120MHz. Additionally, they can deliver 70mA
continuous output current. This level of performance
makes them an ideal op amp for broadcast quality
video systems.
Very Low Diff. Gain, Phase: 0.01%, 0.01°
(LMH6714)
•
•
•
•
•
•
•
−58 HD2/ −70 HD3 at 20MHz
Fast Slew Rate: 1800V/μs
Low Shutdown Current: 500uA (LMH6720)
11ns Turn on Time (LMH6720)
7ns Shutdown Time (LMH6720)
Unity Gain Stable
The LMH6714/LMH6720/LMH6722's small packages
(SOIC, SOT-23 and WSON), low power requirement,
Improved Replacement for
CLC400,401,402,404,406 and 446 (LMH6714)
low
noise
and
distortion
allow
the
LMH6714/LMH6720/LMH6722 to serve portable RF
applications. The high impedance state during
shutdown makes the LMH6720 suitable for use in
multiplexing multiple high speed signals onto a
shared transmission line. The LMH6720 is also ideal
for portable applications where current draw can be
reduced with the shutdown function.
•
•
•
Improved Replacement for CLC405 (LMH6720)
Improved Replacement for CLC415 (LMH6722)
LMH6722QSD is AEC-Q100 Grade 1 Qualified
and is Manufactured on an Automotive Grade
Flow
APPLICATIONS
•
•
•
•
•
•
•
HDTV, NTSC & PAL Video Systems
Video Switching and Distribution
Wideband Active Filters
Cable Drivers
High Speed Multiplexer (LMH6720)
Programmable Gain Amplifier (LMH6720)
Automotive (LMH6722Q)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2002–2013, Texas Instruments Incorporated
LMH6714, LMH6720
LMH6722, LMH6722-Q1
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
Typical Performance
Differential Gain and Phase vs. Number of Video Loads
(LMH6714)
Non-Inverting Small Signal Frequency Response
2
0.05
0.04
0.03
0.02
0.05
0.04
0.03
0.02
A
= 1, R = 600W
F
V
1
GAIN
0
-1
-2
-3
PHASE
PHASE
0
-4
-45
-90
-135
-180
-225
A
= 2, R = 300W
V
F
GAIN
-5
-6
-7
-8
A
= 6, R = 200W
V
F
0.01
0
0.01
0
V
O
= 500mV
PP
100
1
10
1000
1
2
3
4
FREQUENCY (MHz)
VIDEO LOADS (150W EACH)
Figure 1.
Figure 2.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)
ESD Tolerance(3)
Human Body Model
Machine Model
2000V
200V
VCC
±6.75V
IOUT
See(4)
Common Mode Input Voltage
Differential Input Voltage
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (soldering 10 sec)
Storage Temperature Range
Shutdown Pin Voltage(5)
±VCC
2.2V
+150°C
−65°C to +150°C
+300°C
−65°C to +150°C
+VCC to VCC/2-1V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For specific specifications, see the Electrical
Characteristics tables.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of
JEDEC). Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).
(4) The maximum output current (IOUT) is determined by device power dissipation limitations. See the POWER DISSIPATION section for
more details.
(5) The shutdown pin is designed to work between 0 and VCC with split supplies (VCC = -VEE). With single supplies (VEE = ground) the
shutdown pin should not be taken below VCC/2.
2
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
Operating Ratings(1)
Thermal Resistance Package
5-Pin SOT-23 (DBV)
6-Pin SOT-23 (DBV)
8-Pin SOIC (D)
(θJA
)
232°C/W
198°C/W
145°C/W
14-Pin SOIC (D)
130°C/W
14-Pin TSSOP (PW)
14-Pin WSON (NHK)
Operating Temperature
160°C/W
46°C/W
LMH6722Q
All others
−40°C to 125°C
−40°C to 85°C
8V (±4V) to 12.5V (±6.25V)
Supply Voltage Range
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not ensured. For specific specifications, see the Electrical
Characteristics tables.
Electrical Characteristics
Unless specified, AV = +2, RF = 300Ω: VCC = ±5V, RL = 100Ω, LMH6714/LMH6720/LMH6722. Boldface limits apply at
temperature extremes.
Symbol
Parameter
Conditions
Min(1)
Typ(2)
Max(1)
Units
Frequency Domain Response
SSBW
LSBW
LSBW
−3dB Bandwidth
−3dB Bandwidth
VOUT = 0.5VPP
VOUT = 2.0VPP
VOUT = 2.0VPP
345
200
170
400
250
250
MHz
MHz
MHz
−3dB Bandwidth, LMH6722
TSSOP package only
Gain Flatness
Peaking
VOUT = 2VPP
GFP
GFR
LPD
DG
DC to 120MHz
DC to 120MHz
DC to 120MHz
0.1
0.1
dB
dB
deg
%
Rolloff
Linear Phase Deviation
Differential Gain
Differential Gain
Differential Phase
0.5
RL = 150Ω, 4.43MHz (LMH6714)
RL = 150Ω, 4.43MHz (LMH6720)
RL = 150Ω, 4.43MHz
0.01
0.02
0.01
DG
%
DP
deg
Time Domain Response
TRS
TRL
ts
Rise and Fall Time
.5V Step
2V Step
2V Step
6V Step
1.5
2.6
ns
ns
Settling Time to 0.05%
Slew Rate
12
ns
SR
1200
1800
V/µs
Distortion and Noise Response
HD2
HD3
IMD
2nd Harmonic Distortion
3rd Harmonic Distortion
2VPP, 20MHz
−58
−70
−78
dBc
dBc
dBc
2VPP, 20MHz
3rd Order Intermodulation
Products
10MHz, POUT = 0dBm
Equivalent Input Noise
Non-Inverting Voltage
Inverting Current
VN
>1MHz
>1MHz
>1MHz
3.4
10
nV/√Hz
pA/√Hz
pA/√Hz
NICN
ICN
Non-Inverting Current
1.2
(1) All limits are specified by testing, design, or statistical analysis.
(2) Typical values represent the most likely parametric norm at the time of characterization. Actual typical values may vary over time and
will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped production
material.
Copyright © 2002–2013, Texas Instruments Incorporated
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LMH6714, LMH6720
LMH6722, LMH6722-Q1
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
Electrical Characteristics (continued)
Unless specified, AV = +2, RF = 300Ω: VCC = ±5V, RL = 100Ω, LMH6714/LMH6720/LMH6722. Boldface limits apply at
temperature extremes.
Symbol
Parameter
Conditions
Min(1)
Typ(2)
Max(1)
Units
Static, DC Performance
VIO
Input Offset Voltage
±0.2
±6
mV
±8
DVIO
IBN
Average Drift
8
μV/°C
Input Bias Current
Non-Inverting
Inverting
±1
±10
±15
µA
DIBN
IBI
Average Drift
4
nA/°C
µA
Input Bias Current
−4
±12
±20
DIBI
Average Drift
41
58
nA/°C
dB
PSRR
Power Supply Rejection Ratio DC
48
47
CMRR
ICC
Common Mode Rejection
Ratio
DC
48
45
54
5.6
dB
Supply Current
RL = ∞
LMH6714
4.5
7.5
LMH6720
3
8
mA
LMH6722
18
15
22.5
500
30
32
ICCI
Supply Current During
Shutdown
LMH6720
670
μA
Miscellaneous Performance
RIN
Input Resistance
Non-Inverting
Non-Inverting
Closed Loop
RL = ∞
2
MΩ
pF
Ω
CIN
Input Capacitance
Output Resistance
Output Voltage Range
1.0
ROUT
VOUT
0.06
±3.9
±3.5
±3.4
V
RL = 100Ω
±3.6
±3.8
±3.4
CMIR
IOUT
Input Voltage Range
Output Current(3)
Common Mode
±2.2
70
V
VIN = 0V, Max Linear
Current
50
mA
OFFMAX Voltage for Shutdown
LMH6720
0.8
V
V
ONMIN
IIH
Voltage for Turn On
Current Turn On
LMH6720
2.0
LMH6720, SD = 2.0V
−20
−30
2
20
30
μA
IIL
Current Shutdown
ROUT Shutdown
Turn on Time
LMH6720, SD = .8V
LMH6720, SD = .8V
LMH6720
−600
−400
1.8
11
−100
μA
MΩ
ns
IOZ
ton
0.2
toff
Turn off Time
LMH6720
7
ns
(3) The maximum output current (IOUT) is determined by device power dissipation limitations. See the POWER DISSIPATION section for
more details.
4
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
CONNECTION DIAGRAMS
1
5
+
6
5
+
1
V
V
OUT
OUTPUT
SD
-
-
2
2
3
V
V
-
+
-
+
4
3
4
-IN
-IN
+IN
+IN
Figure 3. 5-Pin SOT-23
(LMH6714) (Top View)
See Package Number DBV
Figure 4. 6-Pin SOT-23
(LMH6720) (Top View)
See Package Number DBV
Figure 5. 14-Pin SOIC, TSSOP
and WSON (LMH6722) (Top View)
See Package Numbers D, PW,
and NHK
1
1
8
7
6
5
8
N/C
N/C
N/C
SD
7
2
2
3
+
+
-
-IN
V
-IN
V
-
3
4
6
OUTPUT
N/C
OUTPUT
+
+IN
+IN
+
4
5
-
-
N/C
V
V
Figure 6. 8-Pin SOIC (LMH6714) (Top View)
See Package Number D
Figure 7. 8-Pin SOIC (LMH6720) (Top View)
See Package Number D
Copyright © 2002–2013, Texas Instruments Incorporated
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LMH6714, LMH6720
LMH6722, LMH6722-Q1
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
Typical Performance Characteristics
(V+ = +5V, V− = −5V, AV = 2, RF = 300Ω, RL = 100Ω Unless Specified).
Non-Inverting Small Signal Frequency Response
Non-Inverting Large Signal Frequency Response
2
2
A = 2,
V
A
= 1, R = 600W
V
F
1
1
R
F
= 300W
GAIN
GAIN
0
-1
-2
-3
0
-1
-2
-3
A
= 1, R = 600W
F
V
PHASE
0
0
PHASE
-4
-4
-45
-90
-45
-90
-135
-180
-225
A
= 2, R = 300W
V
F
-5
-6
-7
-8
-5
-6
-7
-8
A
= 6, R = 200W
V
F
A
= 6, R = 200W
-135
-180
-225
V
F
V
= 2V
PP
V
O
= 500mV
O
PP
100
100
1
10
1
10
1000
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 8.
Figure 9.
Inverting Frequency Response
Non-Inverting Frequency Response vs. VO
2
1
2
1
V
= 2V
PP
O
A
V
= -1
V
O
= .5V
PP
R
= 300W
F
GAIN
0
0
-1
-2
-3
V
= 1V
O PP
-1
-2
A
= -2
V
PHASE
0
0
-3
-4
-5
-6
-4
-45
-90
-45
-90
-135
-180
-225
V
= 2V
PP
O
-5
-6
-7
-8
-135
A
= -6
V
R
F
= 300W
V
O
= 4V
PP
-180
-225
-7
-8
A
= 2V/V
V
1
1000
10
100
100
1
10
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 10.
Figure 11.
Inverting Frequency Response vs. VO
Harmonic Distortion vs. Frequency
2
0
V
= 2V
PP
O
1
-10
-20
V
O
= 2V
PP
GAIN
0
-1
-2
-3
-30
-40
-50
V
= 4V
PP
O
PHASE
0
-4
-5
-6
-7
-8
-45
-60
-70
-90
HD2
-135
-180
-225
-80
V
= .5V
100
A
= -1V/V
O
PP
V
HD3
-90
R
= 300W
F
-100
100
0
10
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 12.
Figure 13.
6
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
Typical Performance Characteristics (continued)
(V+ = +5V, V− = −5V, AV = 2, RF = 300Ω, RL = 100Ω Unless Specified).
2nd Harmonic Distortion vs. VOUT
3rd Harmonic Distortion vs. VOUT
0
0
-10
-20
-10
-20
-30
-30
-40
50MHz
-40
-50
50MHz
10MHz
5MHz
-50
10MHz
-60
-70
-60
-70
-80
-80
5MHz
-90
-90
-100
-100
0
0.5
1
1.5
V
2
3
3.5
4
2.5
)
0
0.5
1
1.5
V
2
2.5
)
3
3.5
4
(V
(V
OUT PP
OUT PP
Figure 14.
Figure 15.
DG/DP (LMH6714)
DG/DP (LMH6720)
0.08
0.08
0.05
0.05
0.04
0.03
0.02
0.07
0.06
0.07
0.06
0.04
0.03
0.02
PHASE
0.05
0.05
0.04
0.03
0.02
0.04
0.03
0.02
GAIN
PHASE
GAIN
0.01
0
0.01
0
0.01
0
0.01
0
2
3
1
4
1
2
3
4
VIDEO LOADS (150W EACH)
NUMBER OF VIDEO LOADS
Figure 16.
Figure 17.
DG/DP (LMH6722)
Large Signal Pulse Response
= 2V/V
4
3
2
1
0.04
0.03
0.04
0.03
A
V
PHASE
0
0.02
0.01
0.02
0.01
-1
-2
-3
-4
GAIN
0
0
15
30
35 40 45
0
25
50
5
10
20
1
2
3
4
TIME (nS)
VIDEO LOADS (150W EACH)
Figure 18.
Figure 19.
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SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
Typical Performance Characteristics (continued)
(V+ = +5V, V− = −5V, AV = 2, RF = 300Ω, RL = 100Ω Unless Specified).
Small Signal Pulse Response
Closed Loop Output Resistance
1000
100
1.5
1
A
= +2V/V
V
0.5
R
= 300W
F
10
1
0
A
V
= -1V/V
-0.5
R
F
= 300W
0.1
-1
0.01
-1.5
0.01
0.1
1
100
1000
10
0
5
10 15 20 25 30 35 40 45 50
TIME (nS)
FREQUENCY (MHz)
Figure 20.
Figure 21.
Open Loop Transimpedance Z(s)
PSRR vs. Frequency
130
120
0
-10
-20
110
100
90
MAGNITUDE
-PSRR
-30
-40
0
80
-45
-90
-135
-180
PHASE
-50
-60
-70
70
+PSRR
60
50
10
100
0.01
0.1
1
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 22.
Figure 23.
CMRR vs. Frequency
Frequency Response vs. RF
0
-10
-20
-30
-40
-50
-60
1
0
-1
-2
-3
-4
-5
R
= 147W
F
R
= 300W
F
R
= 400W
F
R
F
= 600W
-6
-7
-8
A
V
= 2V/V
V
= 0.5V
OUT
PP
1
10
100
1000
1
0.1
100
1000
10
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 24.
Figure 25.
8
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
Typical Performance Characteristics (continued)
(V+ = +5V, V− = −5V, AV = 2, RF = 300Ω, RL = 100Ω Unless Specified).
DC Errors vs. Temperature
Maximum VOUT vs. Frequency
8
0
-0.2
-0.4
0
I
BN
-1
-2
7
6
-3
V
OS
I
BI
-0.6
-0.8
-1
5
4
-4
-5
-6
-7
3
2
-1.2
-8
-9
1
-1.4
0
-40 -20
20 40
60
80 100
0.1
1
10
100
1000
FREQUENCY (MHz)
TEMPERATURE (°C)
Figure 26.
Figure 27.
Crosstalk vs. Frequency (LMH6722)
for each channel with all others active
3rd Order Intermodulation vs. Output Power
-10
0
TWO EQUAL POWER
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-20
-30
-40
-50
TONES CENTERED AT
LISTED FREQUENCY
D
100MHz
A
-60
-70
20MHz
C
-80
B
-90
5MHz
12 15
10MHz
-100
-15 -12 -9 -6 -3
0
3
6
9
0.1
1
100
100
1000
OUTPUT POWER FOR EACH TONE (dBmW)
FREQUENCY (MHz)
Figure 28.
Figure 29.
Noise vs. Frequency
1000
100
10
1000
100
10
INVERTING CURRENT
VOLTAGE
NON-INVERTING
CURRENT
1
1
1k
100k
1
100
10k
1M
10
FREQUENCY (Hz)
Figure 30.
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SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
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APPLICATION SECTION
FEEDBACK RESISTOR SELECTION
One of the key benefits of a current feedback operational amplifier is the ability to maintain optimum frequency
response independent of gain by using appropriate values for the feedback resistor (RF). The Electrical
Characteristics and Typical Performance plots specify an RF of 300Ω, a gain of +2V/V and ±5V power supplies
(unless otherwise specified). Generally, lowering RF from it's recommended value will peak the frequency
response and extend the bandwidth while increasing the value of RF will cause the frequency response to roll off
faster. Reducing the value of RF too far below it's recommended value will cause overshoot, ringing and,
eventually, oscillation.
1
0
-1
R
= 147W
F
-2
-3
-4
-5
-6
-7
-8
R
= 300W
F
R
= 400W
F
R
F
= 600W
A
V
= 2V/V
V
= 0.5V
OUT
PP
1
10
100
1000
FREQUENCY (MHz)
Figure 31. Frequency Response vs. RF
Figure 31 shows the LMH6714/LMH6720/LMH6722's frequency response as RF is varied (RL = 100Ω, AV = +2).
This plot shows that an RF of 147Ω results in peaking. An RF of 300Ω gives near maximal bandwidth and gain
flatness with good stability. An RF of 400Ω gives excellent stability with only a small bandwidth penalty. Since all
applications are slightly different it is worth some experimentation to find the optimal RF for a given circuit. Note
that it is not possible to use a current feedback amplifier with the output shorted directly to the inverting input.
The buffer configuration of the LMH6714/LMH6720/LMH6722 requires a 600Ω feedback resistor for stable
operation.
For more information see Application Note OA-13 (SNOA366) which describes the relationship between RF and
closed-loop frequency response for current feedback operational amplifiers. The value for the inverting input
impedance for the LMH6714/LMH6720/LMH6722 is approximately 180Ω. The LMH6714/LMH6720/LMH6722 is
designed for optimum performance at gains of +1 to +6 V/V and −1 to −5V/V. When using gains of ±7V/V or
more the low values of RG required will make inverting input impedances very low.
When configuring the LMH6714/LMH6720/LMH6722 for gains other than +2V/V, it is usually necessary to adjust
the value of the feedback resistor. Figure 32 and Figure 33 provide recommended feedback resistor values for a
number of gain selections.
700
600
500
400
300
200
100
0
1
2
3
4
5
6
7
8
9
10
GAIN (V/V)
Figure 32. RF vs. Non-Inverting Gain
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LMH6714, LMH6720
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www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
In the Figure 32 and Figure 33 charts, the recommended value of RF is depicted by the solid line, which starts
high, decreases to 200Ω and begins increasing again. The reason that a higher RF is required at higher gains is
the need to keep RG from decreasing too far below the output impedance of the input buffer. For the
LMH6714/LMH6720/LMH6722 the output resistance of the input buffer is approximately 180Ω and 50Ω is a
practical lower limit for RG. Due to the limitations on RG the LMH6714/LMH6720/LMH6722 begins to operate in a
gain bandwidth limited fashion for gains of ±5V/V or greater.
450
400
350
300
250
200
150
100
50
0
1
2
3
4
5
6
7
8
9
10
GAIN (-V/V)
Figure 33. RF vs. Inverting Gain
ACTIVE FILTERS
When using any current feedback Operational Amplifier as an active filter it is important to be very careful when
using reactive components in the feedback loop. Anything that reduces the impedance of the negative feedback,
especially at higher frequencies, will almost certainly cause stability problems. Likewise capacitance on the
inverting input needs to be avoided. See Application Notes OA-07 (SNOA365) and OA-26 (SNOA387) for more
information on Active Filter applications for Current Feedback Op Amps.
Figure 34. Enable/Disable Operation
ENABLE/DISABLE OPERATION USING ±5V SUPPLIES (LMH6720 ONLY)
The LMH6720 has a TTL logic compatible disable function. Apply a logic low (<.8V) to the DS pin and the
LMH6720 is disabled. Apply a logic high (>2.0V), or let the pin float and the LMH6720 is enabled. Voltage, not
current, at the Disable pin determines the enable/disable state. Care must be exercised to prevent the disable pin
voltage from going more than .8V below the midpoint of the supply voltages (0V with split supplies, VCC/2 with
single supplies) doing so could cause transistor Q1 to Zener resulting in damage to the disable circuit. The core
amplifier is unaffected by this, but disable operation could become slower as a result.
Copyright © 2002–2013, Texas Instruments Incorporated
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LMH6714, LMH6720
LMH6722, LMH6722-Q1
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
Disabled, the LMH6720 inputs and output become high impedances. While disabled the LMH6720 quiescent
current is approximately 500μA. Because of the pull up resistor on the disable circuit the ICC and IEE currents are
not balanced in the disabled state. The positive supply current (ICC) is approximately 500μA while the negative
supply current (IEE) is only 200μA. The remaining IEE current of 300μA flows through the disable pin.
The disable function can be used to create analog switches or multiplexers. Implement a single analog switch
with one LMH6720 positioned between an input and output. Create an analog multiplexer with several
LMH6720's. The LMH6720 is at it's best at a gain of 1 for multiplexer applications because there is no RG to
shunt signals to ground.
DISABLE LIMITATIONS (LMH6720 ONLY)
The feedback Resistor (RF) limits off isolation in inverting gain configurations. During shutdown the impedance of
the LMH6720 inputs and output become very high (>1MΩ), however RF and RG are the dominant factor for
effective output impedance.
Do not apply voltages greater than +VCC or less than 0V (VCC/2 single supply) to the disable pin. The input ESD
diodes will also conduct if the signal leakage through the feedback resistors brings the inverting input near either
supply rail.
+5V
C4
C2
.01mF
6.8mF
IN
+
OUT
50W
R
IN
50W
R
OUT
.1mF
-
C1
C3
.01mF
R
F
6.8mF
300W
300W
R
G
C5
-5V
Figure 35. Typical Application with Suggested Supply Bypassing
LAYOUT CONSIDERATIONS
Whenever questions about layout arise, use the evaluation board as a guide. The following Evaluation boards
are available with sample parts:
LMH6714
LMH6720
LMH6722
SOT-23
SOIC
LMH730216
LMH730227
LMH730216
LMH730227
LMH730231
LMH730131
SOT-23
SOIC
SOIC
TSSOP
To reduce parasitic capacitances, the ground plane should be removed near the input and output pins. To
reduce series inductance, trace lengths of components in the feedback loop should be minimized. For long signal
paths controlled impedance lines should be used, along with impedance matching at both ends.
Bypass capacitors should be placed as close to the device as possible. Bypass capacitors from each rail to
ground are applied in pairs. The larger electrolytic bypass capacitors can be located anywhere on the board, the
smaller ceramic capacitors should be placed as close to the device as possible. In addition Figure 35 shows a
capacitor (C1) across the supplies with no connection to ground. This capacitor is optional, however it is required
for best 2nd Harmonic suppression. If this capacitor is omitted C2 and C3 should be increased to .1μF each.
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
VIDEO PERFORMANCE
The LMH6714/LMH6720/LMH6722 has been designed to provide excellent performance with both PAL and
NTSC composite video signals. Performance degrades as the loading is increased, therefore best performance
will be obtained with back terminated loads. The back termination reduces reflections from the transmission line
and effectively masks capacitance from the amplifier output stage. While all parts offer excellent video
performance the LMH6714 and LMH6722 are slightly better than the LMH6720.
WIDE BAND DIGITAL PROGRAMMABLE GAIN AMPLIFIER (LMH6720 ONLY)
Figure 36. Wideband Digitally Controlled Programmable Gain Amplifier
Channel Switching
Figure 37. PGA Output
As shown in Figure 36 and Figure 37 the LMH6720 can be used to construct a digitally controlled programmable
gain amplifier. Each amplifier is configured to provide a digitally selectable gain. To provide for accurate gain
settings, 1% or better tolerance is recommended on the feedback and gain resistors. The gain provided by each
digital code is arbitrary through selection of the feedback and gain resistor values.
Copyright © 2002–2013, Texas Instruments Incorporated
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
AMPLITUDE EQUALIZATION
Sending signals over coaxial cable greater than 50 meters in length will attenuate high frequency signal
components much more than lower frequency components. An equalizer can be made to pre emphasize the
higher frequency components so that the final signal has less distortion. This process can be done at either end
of the cable. The circuit in Figure 38 shows a receiver with some additional components in the feedback loop to
equalize the incoming signal. The RC networks peak the signal at higher frequencies. This peaking is a
piecewise linear approximation of the inverse of the frequency response of the coaxial cable. Figure 39 shows
the effect of this equalization on a digital signal that has passed through 150 meters of coaxial cable. Figure 40
shows a Bode plot of the frequency response of the circuit in Figure 38 along with equations needed to design
the pole and zero frequencies. Figure 41 shows a network analyzer plot of an LMH6714/LMH6720/LMH6722 with
the following component values:
RG = 309Ω
R1 = 450Ω
C1 = 470pF
R2 = 91Ω
C2 = 68pF
Figure 38. Equalizer Circuit Schematic
Figure 39. Digital Signal without and with Equalization
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
www.ti.com
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
Figure 40. Design Equations
10
8
6
4
2
0
-2
-4
-6
10M
FREQUENCY (Hz)
10k
100k
1M
100M
1G
Figure 41. Equalizer Frequency Response
POWER DISSIPATION
Follow these steps to determine the Maximum power dissipation for the LMH6714/LMH6720/LMH6722:
1. Calculate the quiescent (no load) power: PAMP = ICC (VCC -VEE
)
2. Calculate the RMS power at the output stage: POUT (RMS) = ((VCC - VOUT (RMS)) * IOUT (RMS)), where VOUT
and IOUT are the voltage and current across the external load.
3. Calculate the total RMS power: PT = PAMP + POUT
The maximum power that the LMH6714/LMH6720/LMH6722, package can dissipate at a given temperature can
be derived with the following equation:
PMAX = (150° - TA)/ θJA, where TA = Ambient temperature (°C) and θJA = Thermal resistance, from junction to
ambient, for a given package (°C/W). For the SOIC package θJA is 145°C/W, for the 5-pin SOT-23 it is 232°C/W.
Copyright © 2002–2013, Texas Instruments Incorporated
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
LMH6714, LMH6720
LMH6722, LMH6722-Q1
SNOSA39G –NOVEMBER 2002–REVISED APRIL 2013
www.ti.com
REVISION HISTORY
Changes from Revision F (April 2013) to Revision G
Page
•
Changed layout of National Data Sheet to TI format .......................................................................................................... 15
16
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Product Folder Links: LMH6714 LMH6720 LMH6722 LMH6722-Q1
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
PACKAGING INFORMATION
Orderable Device
LMH6714MA
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 85
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
NRND
SOIC
SOIC
SOIC
D
8
8
8
95
TBD
Call TI
CU SN
CU SN
Call TI
LMH67
14MA
LMH6714MA/NOPB
LMH6714MAX/NOPB
ACTIVE
ACTIVE
D
D
95
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-260C-UNLIM
-40 to 85
LMH67
14MA
2500
Green (RoHS
& no Sb/Br)
-40 to 85
LMH67
14MA
LMH6714MF
NRND
SOT-23
SOT-23
DBV
DBV
5
5
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
A95A
A95A
LMH6714MF/NOPB
ACTIVE
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LMH6714MFX/NOPB
LMH6720MA
ACTIVE
NRND
SOT-23
SOIC
DBV
D
5
8
3000
95
Green (RoHS
& no Sb/Br)
CU SN
Call TI
Level-1-260C-UNLIM
Call TI
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
A95A
TBD
LMH67
20MA
LMH6720MA/NOPB
LMH6720MAX
ACTIVE
NRND
SOIC
D
8
95
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
Call TI
LMH67
20MA
SOIC
D
8
2500
2500
1000
3000
55
TBD
Call TI
LMH67
20MA
LMH6720MAX/NOPB
LMH6720MF/NOPB
LMH6720MFX/NOPB
LMH6722MA
ACTIVE
ACTIVE
ACTIVE
NRND
SOIC
D
8
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Call TI
LMH67
20MA
SOT-23
SOT-23
SOIC
DBV
DBV
D
6
Green (RoHS
& no Sb/Br)
CU SN
A96A
6
Green (RoHS
& no Sb/Br)
CU SN
A96A
14
14
14
14
14
TBD
Call TI
LMH67
22MA
LMH6722MA/NOPB
LMH6722MAX
ACTIVE
NRND
SOIC
D
55
Green (RoHS
& no Sb/Br)
SN | CU SN
Call TI
Level-1-260C-UNLIM
Call TI
LMH67
22MA
SOIC
D
2500
2500
94
TBD
LMH67
22MA
LMH6722MAX/NOPB
LMH6722MT/NOPB
ACTIVE
ACTIVE
SOIC
D
Green (RoHS
& no Sb/Br)
SN | CU SN
CU SN
Level-1-260C-UNLIM
Level-1-260C-UNLIM
LMH67
22MA
TSSOP
PW
Green (RoHS
& no Sb/Br)
LMH67
22MT
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 85
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
LMH6722MTX/NOPB
LMH6722QSD/NOPB
LMH6722QSDX/NOPB
LMH6722SD/NOPB
LMH6722SDX/NOPB
ACTIVE
TSSOP
WSON
WSON
WSON
WSON
PW
14
14
14
14
14
2500
Green (RoHS
& no Sb/Br)
CU SN
CU SN
CU SN
CU SN
CU SN
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
LMH67
22MT
ACTIVE
ACTIVE
ACTIVE
ACTIVE
NHK
NHK
NHK
NHK
1000
4500
1000
4500
Green (RoHS
& no Sb/Br)
-40 to 125
-40 to 125
-40 to 85
L6722Q
Green (RoHS
& no Sb/Br)
L6722Q
L6722
L6722
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
-40 to 85
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF LMH6722, LMH6722-Q1 :
Catalog: LMH6722
•
Automotive: LMH6722-Q1
•
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
•
Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
•
Addendum-Page 3
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Sep-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
LMH6714MAX/NOPB
LMH6714MF
SOIC
SOT-23
SOT-23
SOT-23
SOIC
D
8
5
2500
1000
1000
3000
2500
2500
1000
3000
2500
2500
2500
1000
4500
1000
4500
330.0
178.0
178.0
178.0
330.0
330.0
178.0
178.0
330.0
330.0
330.0
178.0
330.0
178.0
330.0
12.4
8.4
6.5
3.2
3.2
3.2
6.5
6.5
3.2
3.2
6.5
6.5
6.95
3.3
3.3
3.3
3.3
5.4
3.2
3.2
3.2
5.4
5.4
3.2
3.2
9.35
9.35
8.3
4.3
4.3
4.3
4.3
2.0
1.4
1.4
1.4
2.0
2.0
1.4
1.4
2.3
2.3
1.6
1.0
1.0
1.0
1.0
8.0
4.0
4.0
4.0
8.0
8.0
4.0
4.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
12.0
8.0
Q1
Q3
Q3
Q3
Q1
Q1
Q3
Q3
Q1
Q1
Q1
Q1
Q1
Q1
Q1
DBV
DBV
DBV
D
LMH6714MF/NOPB
LMH6714MFX/NOPB
LMH6720MAX
5
8.4
8.0
5
8.4
8.0
8
12.4
12.4
8.4
12.0
12.0
8.0
LMH6720MAX/NOPB
LMH6720MF/NOPB
LMH6720MFX/NOPB
LMH6722MAX
SOIC
D
8
SOT-23
SOT-23
SOIC
DBV
DBV
D
6
6
8.4
8.0
14
14
14
14
14
14
14
16.4
16.4
12.4
12.4
12.4
12.4
12.4
16.0
16.0
12.0
12.0
12.0
12.0
12.0
LMH6722MAX/NOPB
LMH6722MTX/NOPB
LMH6722QSD/NOPB
LMH6722QSDX/NOPB
LMH6722SD/NOPB
LMH6722SDX/NOPB
SOIC
D
TSSOP
WSON
WSON
WSON
WSON
PW
NHK
NHK
NHK
NHK
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Sep-2013
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
LMH6714MAX/NOPB
LMH6714MF
SOIC
SOT-23
SOT-23
SOT-23
SOIC
D
8
5
2500
1000
1000
3000
2500
2500
1000
3000
2500
2500
2500
1000
4500
1000
4500
367.0
210.0
210.0
210.0
367.0
367.0
210.0
210.0
367.0
367.0
367.0
210.0
367.0
210.0
367.0
367.0
185.0
185.0
185.0
367.0
367.0
185.0
185.0
367.0
367.0
367.0
185.0
367.0
185.0
367.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
DBV
DBV
DBV
D
LMH6714MF/NOPB
LMH6714MFX/NOPB
LMH6720MAX
5
5
8
LMH6720MAX/NOPB
LMH6720MF/NOPB
LMH6720MFX/NOPB
LMH6722MAX
SOIC
D
8
SOT-23
SOT-23
SOIC
DBV
DBV
D
6
6
14
14
14
14
14
14
14
LMH6722MAX/NOPB
LMH6722MTX/NOPB
LMH6722QSD/NOPB
LMH6722QSDX/NOPB
LMH6722SD/NOPB
LMH6722SDX/NOPB
SOIC
D
TSSOP
WSON
WSON
WSON
WSON
PW
NHK
NHK
NHK
NHK
Pack Materials-Page 2
MECHANICAL DATA
NHK0014A
SDA14A (Rev A)
www.ti.com
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
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