ADM4168EBRUZ-RL7 [ADI]
15 kV ESD Protected Dual RS-422 Transceiver; 15千伏ESD保护的双路RS-422收发器
| 型号： | ADM4168EBRUZ-RL7 |
| 厂家： | 
ADI |
| 描述： | 15 kV ESD Protected Dual RS-422 Transceiver |
| 文件： | 总12页 (文件大小：290K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
15 kV ESD Protected
Dual RS-422 Transceiver
Data Sheet
ADM4168E
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
CC
Dual transceivers for RS-422
ESD protection on bus input/output pins
15 kV human body model (HBM)
8 kV IEC 61000-4-2, contact discharge
8 kV IEC 61000-4-2, air discharge
Complies with TIA/EIA-422-B and ITU-T recommendation V.11
Open-circuit fail-safe
Suitable for 5 V power supply applications
Low supply current operation: 9 mA maximum
Low driver output skew
ADM4168E
DI1
Y1
Z1
B1
A1
R1
D1
RO1
DE1
DE2
Z2
RO2
A2
Receiver input impedance: 30 kΩ
R2
D2
B2
Y2
Receiver common-mode range: −7 V to +7 V
Power-up/power-down without glitches
16-pin TSSOP package
DI2
GND
Operating temperature range: −40°C to +85°C
Figure 1.
APPLICATIONS
RS-422 interfaces
High data rate motor control
Single-ended-to-differential signal conversion
Point-to-point and multidrop transmission systems
GENERAL DESCRIPTION
The ADM4168E has dual RS-422 transceivers suitable for
high speed communication on point-to-point and multidrop
transmission lines. The ADM4168E is designed for balanced
transmission lines and complies with TIA/EIA-422-B.
The receivers of the ADM4168E contain a fail-safe feature that
results in a logic high output state if the inputs are unconnected
(floating).
The ADM4168E is fully specified over the commercial and
industrial temperature ranges and is available in a 16-pin
TSSOP package.
The differential driver outputs and receiver inputs feature electro-
static discharge circuitry that provides protection up to 15 kV
HBM and 8 kV IEC 61000-4-2 (contact and air discharge).
The ADM4168E operates from a single 5 V power supply.
Excessive power dissipation caused by bus contention or output
shorting is prevented by short-circuit protection circuitry. Short-
circuit protection circuits limit the maximum output current to
150 mA during fault conditions.
Rev. 0
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
rightsof 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.
ADM4168E
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Pin Configuration and Function Descriptions..............................6
Typical Performance Characteristics ..............................................7
Test Circuits and Switching Characteristics...................................9
Driver Measurements ...................................................................9
Receiver Measurements................................................................9
Theory of Operation ...................................................................... 10
Truth Tables................................................................................. 10
Outline Dimensions....................................................................... 11
Ordering Guide .......................................................................... 11
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 4
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
REVISION HISTORY
9/12—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
Data Sheet
ADM4168E
SPECIFICATIONS
4.5 V ≤ VCC ≤ 5.5 V; all minimum/maximum specifications apply over the entire recommended operation range, unless otherwise noted.
All typical specifications are at TA = 25°C, VCC = 5.0 V, unless otherwise noted.
Table 1.
Parameter
Symbol Min
Typ
Max
Unit
Test Conditions/Comments
No load, drivers enabled
VI = VCC or GND
SUPPLY CURRENT
Total Package
ICC
4
5
6
9
mA
mA
VI = 2.4 V or 0.5 V1
DRIVER
Differential Outputs (Y1, Z1, Y2, Z2 Pins)
Input Clamp Voltage
Output Voltage High
Output Voltage Low
Differential Output Voltage
No Load
VIK
VOH
VOL
−1.5
0.4
V
V
V
II = −18 mA
VIH = 2 V, VIL = 0.8 V, IOH = −20 mA
VIH = 2 V, VIL = 0.8 V, IOL = 20 mA
2.4
3.5
0.2
|VOD1
|VOD2
|
|
2.0
2.0
6.0
V
V
V
V
IO = 0 mA
Outputs Loaded2
3.7
RL = 100 Ω (see Figure 11)
RL = 100 Ω (see Figure 11)
RL = 100 Ω (see Figure 11)
RL = 100 Ω (see Figure 11)
DE = 0 V, VCC = 0 V or 5 V, VO = 6 V
DE = 0 V, VCC = 0 V or 5 V, VO = −0.25 V
VO = VCC or GND
Δ|VOD| for Complementary Output States ∆|VOD|
Common-Mode Output Voltage VOC
Δ|VOC| for Complementary Output States Δ|VOC|
0.4
3.0
0.4
V
Output Leakage Current
IO
100
µA
µA
mA
pF
−100
−30
Output Current (Short Circuit)3
Input Capacitance
IOS
CI
−150
6
Logic Inputs (DI, DE Pins)
Input Voltage High
Input Voltage Low
Input Current High
Input Current Low
VIH
VIL
IIH
2.0
V
V
µA
µA
0.8
1
−1
VI = VCC or VIH
VI = GND or VIL
IIL
RECEIVER
Differential Inputs (A1, B1, A2, B2 Pins)
Differential Input Threshold Voltage2
Input Voltage Hysteresis
VTH
VHYS
II
−200
+200
mV
mV
mA
mA
kΩ
60
30
Input Current
1.5
−2.5
VI = 7 V, other input at 0 V
VI = −7 V, other input at 0 V
VIC = −7 V to +7 V, other input at 0 V
Line Input Resistance
Logic Outputs (RO1, RO2 Pins)
Output Voltage High
RIN
12
VOH
VOL
3.8
4.2
0.1
V
V
VID = 200 mV, IOH = −6 mA
VID = −200 mV, IOL = 6 mA
Output Voltage Low
0.3
1 Measured per input with other inputs at VCC or GND.
2 For exact conditions, see TIA/EIA-422-B.
3 No more than one output shorted at any time, with the duration of the short not to exceed 1 second.
Rev. 0 | Page 3 of 12
ADM4168E
Data Sheet
TIMING SPECIFICATIONS
4.5 V ≤ VCC ≤ 5.5 V; all minimum/maximum specifications apply over the entire recommended operation range, unless otherwise noted.
All typical specifications are at TA = 25°C, VCC = 5.0 V, unless otherwise noted.
Table 2.
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
DRIVER
R1, R2 = 50 Ω; R3 = 500 Ω; C1, C2, C3 = 40 pF
S1 open (see Figure 12 and Figure 13)
S1 open (see Figure 12 and Figure 13)
S1 open (see Figure 12 and Figure 13)
S1 closed (see Figure 13 and Figure 14)
S1 closed (see Figure 13 and Figure 14)
Propagation Delay
Driver Output Skew
Rise Time/Fall Time
Enable Time
Disable Time
RECEIVER1
tDPLH, tDPHL
tSK
tDR, tDF
tZH, tZL
tHZ, tLZ
8
1.5
5
10
7
16
4
10
19
16
ns
ns
ns
ns
ns
Propagation Delay
Transition Time
tRPLH, tRPHL
tTLH, tTHL
9
15
4
27
9
ns
ns
CL = 50 pF (see Figure 15 and Figure 16)
VIC = 0 V, CL = 50 pF (see Figure 15 and Figure 16)
1 Measured per input with other inputs at VCC or GND.
Rev. 0 | Page 4 of 12
Data Sheet
ADM4168E
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 3.
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Parameter
Rating
VCC
−0.3 V to +7 V
−0.3 V to +7 V
−0.3 V to +7 V
−0.3 V to VCC + 0.3 V
−0.3 V to +7 V
−14 V to +14 V
−40°C to +85°C
−65°C to +150°C
Digital Input Voltage (DE1, DE2)
Driver Input Voltage (DI1, DI2)
Receiver Output Voltage (RO1, RO2)
Driver Output Voltage (Y1, Z1, Y2, Z2)
Receiver Input Voltage (A1, B1, A2, B2)
Operating Temperature Range
Storage Temperature Range
ESD Protection on Ax, Bx, Yx, and Zx
Human Body Model (HBM)
IEC 61000-4-2, Contact Discharge
IEC 61000-4-2, Air Discharge
Table 4. Thermal Resistance
Package Type
θJA
Unit
16-Lead TSSOP
113
°C/W
ESD CAUTION
15 kV
8 kV
8 kV
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.
Rev. 0 | Page 5 of 12
ADM4168E
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
16
15
14
V
CC
B1
A1
DI1
Y1
RO1
DE1
RO2
A2
ADM4168E 13
Z1
TOP VIEW
12
DE2
Z2
(Not to Scale)
11
10
9
Y2
B2
DI2
GND
Figure 2. Pin Configuration
Table 5. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
2
3
4
B1
A1
RO1
DE1
Inverting Receiver Input B, Transceiver 1.
Noninverting Receiver Input A, Transceiver 1.
Receiver Output, Transceiver 1.
Driver Output Enable, Transceiver 1. A logic high enables the differential driver outputs, Y1 and Z1; a logic low
places the differential driver outputs in a high impedance state.
5
6
7
8
9
RO2
A2
B2
GND
DI2
Receiver Output, Transceiver 2.
Noninverting Receiver Input A, Transceiver 2.
Inverting Receiver Input B, Transceiver 2.
Ground.
Driver Input, Transceiver 2. When the driver is enabled, a logic low on DI2 forces Y2 low and Z2 high, whereas
a logic high on DI2 forces Y2 high and Z2 low.
10
11
12
Y2
Z2
DE2
Noninverting Driver Output Y, Transceiver 2.
Inverting Driver Output Z, Transceiver 2.
Driver Output Enable, Transceiver 2. A logic high enables the differential driver outputs, Y2 and Z2; a logic low
places the differential driver outputs in a high impedance state.
13
14
15
Z1
Y1
DI1
Inverting Driver Output Z, Transceiver 1.
Noninverting Driver Output Y, Transceiver 1.
Driver Input, Transceiver 1. When the driver is enabled, a logic low on DI1 forces Y1 low and Z1 high, whereas
a logic high on DI1 forces Y1 high and Z1 low.
16
VCC
Power Supply (5 V 10%).
Rev. 0 | Page 6 of 12
Data Sheet
ADM4168E
TYPICAL PERFORMANCE CHARACTERISTICS
120
100
90
80
70
60
50
40
30
20
10
0
100Ω LOAD
100Ω LOAD
UNLOADED
100
UNLOADED
80
60
40
20
0
–40
–20
0
20
40
60
80
1
2
3
4
5
6
7
8
9
10
TEMPERATURE (°C)
DATA RATE (Mbps)
Figure 3. Supply Current vs. Temperature, Data Rate = 10 Mbps
Figure 6. Supply Current vs. Data Rate
4.3
4.1
3.9
3.7
3.5
3.3
3.1
2.9
2.7
2.5
4.0
TRANSCEIVER 1
TRANSCEIVER 1
TRANSCEIVER 2
TRANSCEIVER 2
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
4.5
4.6
4.7
4.8
4.9
5.0
5.1
CC
5.2
5.3
5.4
5.5
–40
–20
0
20
40
60
80
SUPPLY VOLTAGE, V (V)
TEMPERATURE (°C)
Figure 7. Driver Differential Output Voltage vs. Supply Voltage
Figure 4. Driver Differential Output Voltage vs. Temperature
500
6
TRANSCEIVER 1
TRANSCEIVER 2
TRANSCEIVER 1
TRANSCEIVER 2
450
5
400
350
300
250
200
150
100
50
4
3
2
1
0
0
–40
–20
0
20
40
60
80
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 8. Receiver Output Voltage Low vs. Temperature
Figure 5. Receiver Output Voltage High vs. Temperature
Rev. 0 | Page 7 of 12
ADM4168E
Data Sheet
DI
A
1
B
2
4
RO
Y
Z
3
CH2 2V
CH4 2V
CH3 2V
M100ns
A CH2
2.28V
CH1 2V
CH3 2V
CH2 2V
M100ns
A CH1
2.48V
Figure 9. Driver Output
Figure 10. Receiver Output
Rev. 0 | Page 8 of 12
Data Sheet
ADM4168E
TEST CIRCUITS AND SWITCHING CHARACTERISTICS
DRIVER MEASUREMENTS
Y
R
Y
Z
Y
L
C
2
R
1
R
2
3
DI
V
OD
DI
V
C
1
1.5V
OD2
S1
R
L
R
2
Z
2
DE
V
OC
Z
C
3
NOTES
1. C , C , C INCLUDE PROBE/INSTRUMENT CAPACITANCE.
1
2
3
Figure 11. Driver Voltage Measurements
Figure 13. Driver Timing Circuit
5V
5V
DE
INPUT
1.3V
tZL
1.3V
1.3V
1.3V
0V
0V
tDPLH
tDPHL
tLZ
1.5V
V
OH
0.8V
V
+ 0.3V
OL
OUT
50%
50%
1.3V
Y
1.3V
V
V
OL
OH
V
V
OL
tZH
tHZ
tSK
tSK
OUT
OH
2V
V
– 0.3V
OH
50%
1.3V
Z
50%
1.3V
1.5V
NOTES
V
OL
1. INPUT PULSE GENERATOR: PPR 1MHz; 50% DUTY CYCLE; tR
,
tF ≤ 6ns.
tDPHL
tDPLH
Figure 14. Driver Enable/Disable Timing
+V
O
90% POINT
90% POINT
V
OD
10% POINT
10% POINT
–V
O
tDR
tDF
NOTES
1. INPUT PULSE GENERATOR: PPR 1MHz; 50% DUTY CYCLE; tR
,
tF ≤ 6ns.
Figure 12. Driver Propagation Delay and Rise/Fall Timing
RECEIVER MEASUREMENTS
A
2.5V
V
B
O
0V
0V
B
(A = 0V)
C
L
–2.5V
NOTES
tRPLH
tRPHL
1. C INCLUDES PROBE/INSTRUMENT CAPACITANCE.
L
V
OH
Figure 16. Receiver Timing Circuit
90%
90%
RO
50%
50%
10%
10%
V
OL
tTLH
tTHL
NOTES
1. INPUT PULSE GENERATOR: PPR 1MHz; 50% DUTY CYCLE; tR
,
tF ≤ 6ns.
Figure 15. Receiver Propagation Delay and Transition Timing
Rev. 0 | Page 9 of 12
ADM4168E
Data Sheet
THEORY OF OPERATION
The ADM4168E is a dual RS-422 transceiver that operates from
a single 5 V 10% power supply. The ADM4168E is intended for
balanced data transmission and complies with TIA/EIA-422-B
and ITU-T recommendation V.11. Each device contains two
differential line drivers and two differential line receivers and
is suitable for full-duplex data transmission.
Table 7. Transmitting (Each Driver)
Inputs
Outputs
DE
H
H
DI
H
L
Z
L
H
Z
Y
H
L
L
X
Z
The receivers contain a fail-safe feature that results in a logic
high output state if the inputs are unconnected (floating).
Table 8. Receiving (Each Receiver)
The ADM4168E features a low propagation delay, ensuring
maximum baud rate operation. The balanced driver ensures
distortion-free transmission.
Inputs
Output
A − B
RO
H
L
≥ +0.2 V
≤ −0.2 V
Another important specification is a measure of the skew
between the complementary outputs. Low skew enhances
the noise immunity of the system and decreases the amount
of electromagnetic interference (EMI).
−0.2 V < A − B < +0.2 V
Inputs open
I
H
TRUTH TABLES
Table 6. Abbreviations in Truth Tables
Letter
Description
H
I
L
X
Z
High level
Indeterminate
Low level
Irrelevant
High impedance (off)
Rev. 0 | Page 10 of 12
Data Sheet
ADM4168E
OUTLINE DIMENSIONS
5.10
5.00
4.90
16
9
8
4.50
4.40
4.30
6.40
BSC
1
PIN 1
1.20
MAX
0.15
0.05
0.20
0.09
0.75
0.60
0.45
8°
0°
0.30
0.19
0.65
BSC
SEATING
PLANE
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-153-AB
Figure 17. 16-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-16)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
Temperature Range
−40°C to +85°C
−40°C to +85°C
Package Description
Package Option
ADM4168EBRUZ
ADM4168EBRUZ-RL7
EVAL-ADM4168EEBZ
16-Lead Thin Shrink Small Outline Package [TSSOP]
16-Lead Thin Shrink Small Outline Package [TSSOP]
Evaluation Board
RU-16
RU-16
1 Z = RoHS Compliant Part.
Rev. 0 | Page 11 of 12
ADM4168E
NOTES
Data Sheet
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10820-0-9/12(0)
Rev. 0 | Page 12 of 12
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