3.3 V, Full-Duplex, 840 μA,
20 Mbps, EIA RS-485 Transceiver
ADM3491-1
Data Sheet
FUNCTIONAL BLOCK DIAGRAM
Operates with 3.3 V supply
EIA RS-422 and RS-485 compliant over full CM range
19 kΩ input impedance
Up to 50 transceivers on bus
20 Mbps data rate
Short-circuit protection
Specified over full temperature range
Thermal shutdown
Interoperable with 5 V logic
840 μA supply current
2 nA shutdown current
Available in PDIP, SOIC, and TSSOP
Meets IEC1000-4-4 (>1 kV)
8 ns skew
Upgrade for MAX3491, SN75ALS180
ADM3491-1
A
RO
R
B
RE
DE
Z
DI
D
Y
05234-001
FEATURES
Figure 1.
APPLICATIONS
Telecommunications
DTE–DCE interface
Packet switching
Local area networks
Data concentration
Data multiplexers
Integrated services digital network (ISDN)
AppleTalk
Industrial controls
GENERAL DESCRIPTION
The ADM3491-1 is a low power, differential line transceiver
designed to operate using a single 3.3 V power supply. Low
power consumption, coupled with a shutdown mode, makes it
ideal for power-sensitive applications. It is suitable for communication on multipoint bus transmission lines.
The ADM3491-1 is intended for balanced data transmission
and complies with both Electronic Industries Association (EIA)
Standards RS-485 and RS-422. It contains a differential line
driver and a differential line receiver, making it suitable for fullduplex data transfer.
Rev. C
The input impedance is 19 kΩ, allowing up to 50 transceivers to
be connected on the bus. A thermal shutdown circuit prevents
excessive power dissipation caused by bus contention or by
output shorting. This feature forces the driver output into a high
impedance state if a significant temperature increase is detected
in the internal driver circuitry during fault conditions.
If the inputs are unconnected (floating), the receiver contains a
fail-safe feature that results in a logic high output state.
The ADM3491-1 is fabricated on BiCMOS, an advanced mixed
technology process combining low power CMOS with fast
switching bipolar technology.
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Tel: 781.329.4700 ©1998–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
ADM3491-1
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................7
Applications ....................................................................................... 1
Test Circuits ........................................................................................9
General Description ......................................................................... 1
Switching Characteristics .............................................................. 10
Functional Block Diagram .............................................................. 1
Theory of Operation ...................................................................... 11
Revision History ............................................................................... 2
Differential Data Transmission ................................................ 11
Specifications..................................................................................... 3
Cable and Data Rate ................................................................... 11
Timing Specifications .................................................................. 4
Receiver Open-Circuit Fail-Safe Feature ................................ 11
Absolute Maximum Ratings............................................................ 5
Outline Dimensions ....................................................................... 12
ESD Caution .................................................................................. 5
Ordering Guide .......................................................................... 13
Pin Configurations and Function Descriptions ........................... 6
REVISION HISTORY
6/14—Rev. B to Rev. C
11/04—Rev. 0 to Rev. A
Changes to Ordering Guide .......................................................... 13
Format Updated .................................................................. Universal
Changes to Specifications Section ...................................................3
Changes to Ordering Guide .......................................................... 13
10/06—Rev. A to Rev. B
Changes to Part Number ................................................... Universal
Updated Format .................................................................. Universal
Changes to Features.......................................................................... 1
Changes to General Description .................................................... 1
Changes to Table 2 ............................................................................ 4
Changes to Table 3 ............................................................................ 4
Changes to Figure 24 and Figure 25 ............................................. 10
Changes to Table 8 .......................................................................... 11
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 13
1/98—Revision 0: Initial Version
Rev. C | Page 2 of 16
Data Sheet
ADM3491-1
SPECIFICATIONS
VCC = 3.3 V ± 0.3 V. All specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
DRIVER
Differential Output Voltage, VOD
∆|VOD| for Complementary Output States
Common-Mode Output Voltage, VOC
∆|VOC| for Complementary Output States
CMOS Input Logic Threshold Low, VINL
CMOS Input Logic Threshold High, VINH
Logic Input Current (DE, DI, RE)
Output Leakage (Y, Z) Current
Output Short-Circuit Current
RECEIVER
Differential Input Threshold Voltage, VTH
Input Voltage Hysteresis, ∆VTH
Input Resistance
Input Current (A, B)
Logic Enable Input Current (RE)
Output Voltage Low, VOL
Output Voltage High, VOH
Short-Circuit Output Current
Three-State Output Leakage Current
POWER SUPPLY CURRENT
ICC
Supply Current in Shutdown
Min
Typ
Max
Unit
Test Conditions/Comments
V
V
V
V
V
V
V
V
μA
μA
mA
RL = 100 Ω, VCC > 3.1 V, see Figure 14
RL = 54 Ω, see Figure 14
RL = 60 Ω, −7 V < VTST < +12 V, see Figure 15
R = 54 Ω or 100 Ω, see Figure 14
R = 54 Ω or 100 Ω, see Figure 14
R = 54 Ω or 100 Ω, see Figure 14
−7 V < VCM < +12 V
VCM = 0 V
−7 V < VCM < +12 V
VIN = 12 V
VIN = −7 V
±60
±1.0
V
mV
kΩ
mA
mA
μA
V
V
mA
μA
IOUT = +2.5 mA
IOUT = −1.5 mA
VOUT = GND or VCC
VCC = 3.6 V, 0 V < VOUT < VCC
1.5
1.5
1
mA
mA
μA
Outputs unloaded
DE = VCC, RE = 0 V
DE = 0 V, RE = 0 V
DE = 0 V, RE = VCC
2.0
1.5
1.5
0.2
3
0.2
0.8
2.0
±1.0
±3
±250
−0.2
12
+0.2
50
19
1
−0.8
±1
0.4
VCC − 0.4 V
0.84
0.84
0.002
Rev. C | Page 3 of 16
VO = −7 V or +12 V, VCC = 0 V or 3.6 V
VO = −7 V or +12 V
ADM3491-1
Data Sheet
TIMING SPECIFICATIONS
VCC = 3.3 V, TA = 25°C, unless otherwise noted.
Table 2.
Parameter
DRIVER
Differential Output Delay, TDD
Differential Output Transition Time
Propagation Delay Input to Output, TPLH, TPHL
Driver Output to Output, TSKEW
ENABLE/DISABLE
Driver Enable to Output Valid
Driver Disable Timing
Driver Enable from Shutdown
RECEIVER
Time to Shutdown
Propagation Delay Input to Output, TPLH, TPHL
Skew, TPLH – TPHL
Receiver Enable, TEN
Receiver Disable, TDEN
Receiver Enable from Shutdown
Min
Typ
Max
Unit
Test Conditions/ Comments
1
1
7
8
22
35
15
35
8
ns
ns
ns
ns
RL = 60 Ω, CL1 = CL2 = 15 pF, see Figure 18
RL = 60 Ω, CL1 = CL2 = 15 pF, see Figure 18
RL = 27 Ω, CL1 = CL2 = 15 pF, see Figure 19
RL = 54 Ω, CL1 = CL2 = 15 pF, see Figure 19
45
40
65
90
80
110
ns
ns
ns
RL = 110 Ω, CL = 50 pF, see Figure 16
RL = 110 Ω, CL = 50 pF, see Figure 16
RL = 110 Ω, CL = 15 pF, see Figure 16
190
65
300
90
10
50
45
500
ns
ns
ns
ns
ns
ns
CL = 15 pF, see Figure 21
CL = 15 pF, see Figure 21
CL = 15 pF, see Figure 17
CL = 15 pF, see Figure 17
CL = 15 pF, see Figure 17
80
25
25
25
VCC = 3.3 V ± 0.3 V, TA = TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter
DRIVER
Differential Output Delay, TDD
Differential Output Transition Time
Propagation Delay Input to Output, TPLH, TPHL
Driver Output to Output, TSKEW
ENABLE/DISABLE
Driver Enable to Output Valid
Driver Disable Timing
Driver Enable from Shutdown
RECEIVER
Time to Shutdown
Propagation Delay Input to Output, TPLH, TPHL
Skew, TPLH – TPHL
Receiver Enable, TEN
Receiver Disable, TDEN
Receiver Enable from Shutdown
Min
Typ
Max
Unit
Test Conditions/Comments
1
2
7
8
22
70
15
70
10
ns
ns
ns
ns
RL = 60 Ω, CL1 = CL2 = 15 pF, see Figure 18
RL = 60 Ω, CL1 = CL2 = 15 pF, see Figure 18
RL = 27 Ω, CL1 = CL2 = 15 pF, see Figure 19
RL = 54 Ω, CL1 = CL2 = 15 pF, see Figure 19
45
40
65
110
110
110
ns
ns
ns
RL = 110 Ω, CL = 50 pF, see Figure 16
RL = 110 Ω, CL = 50 pF, see Figure 16
RL = 110 Ω, CL = 15 pF, see Figure 16
190
65
500
115
20
50
50
600
ns
ns
ns
ns
ns
ns
CL = 15 pF, see Figure 21
CL = 15 pF, see Figure 21
CL = 15 pF, see Figure 17
CL = 15 pF, see Figure 17
CL = 15 pF, see Figure 17
50
25
25
25
Rev. C | Page 4 of 16
Data Sheet
ADM3491-1
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 4.
Parameter
VCC
Inputs
Driver Input (DI)
Control Inputs (DE, RE)
Receiver Inputs (A, B)
Outputs
Driver Outputs
Receiver Output
14-Lead PDIP, Power Dissipation
θJA, Thermal Impedance
14-Lead SOIC, Power Dissipation
θJA, Thermal Impedance
16-Lead TSSOP, Power Dissipation
θJA, Thermal Impedance
Operating Temperature Range
Industrial (A Version)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
ESD Rating
EFT Rating (IEC1000-4-4)
Rating
7V
−0.3 V to VCC + 0.3 V
−0.3 V to VCC + 0.3 V
−7.5 V to +12.5 V
−7.5 V to +12.5 V
−0.5 V to VCC + 0.5 V
800 mW
140°C/W
650 mW
115°C/W
500 mW
158°C/W
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.
ESD CAUTION
−40°C to +85°C
−65°C to +150°C
300°C
215°C
220°C
>2 kV
>1 kV
Rev. C | Page 5 of 16
ADM3491-1
Data Sheet
VCC 1
16
NC
NC
2
15
A
ADM3491-1
14
B
TOP VIEW
(Not to Scale)
13
NC
12
Z
Y
NC 1
14
VCC
RO
3
RO 2
13
VCC
RE
4
DE
5
DI
6
11
NC
7
10
NC
GND
8
9
NC
RE 3
ADM3491-1
12
A
DE 4
TOP VIEW
(Not to Scale)
11
B
10
Z
GND 6
9
GND 7
8
Y
NC
NC = NO CONNECT
05234-002
DI 5
NC = NO CONNECT
Figure 2. 14-Lead PDIP and 14-Lead SOIC Pin Configuration
05234-003
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Figure 3. 16-Lead TSSOP Pin Configuration
Table 5. Pin Function Descriptions
Pin Number
PDIP/SOIC
TSSOP
1, 8
2, 7, 9, 10, 13, 16
Mnemonic
NC
Description
No Connect.
2
3
3
4
RO
Receiver Output. High when A > B by 200 mV; low when A < B by 200 mV.
RE
4
5
DE
Receiver Output Enable. When RE is low, the receiver output RO is enabled. When RE is high, the
output is high impedance. If RE is high and DE is low, the ADM3491-1 enters a shutdown state.
Driver Output Enable. A high level enables the driver differential outputs, Y and Z. A low level
places the part in a high impedance state.
5
6
DI
Driver Input. When the driver is enabled, a logic low on DI forces Y low and Z high; a logic high
on DI forces Y high and Z low.
6, 7
9
10
11
12
13, 14
8
11
12
14
15
1
GND
Y
Z
B
A
VCC
Ground Connection, 0 V.
Noninverting Driver Output Y.
Inverting Driver Output Z.
Inverting Receiver Input B.
Noninverting Receiver Input A.
Power Supply, 3.3 V ± 0.3 V.
Rev. C | Page 6 of 16
Data Sheet
ADM3491-1
14
14
12
12
OUTPUT CURRENT (mA)
10
8
6
4
0
0
0.5
1
1.5
2
2.5
3
8
6
4
2
05234-016
2
10
0
3.5
05234-019
OUTPUT CURRENT (mA)
TYPICAL PERFORMANCE CHARACTERISTICS
0
0.5
1.5
2
2.5
3
3.5
4
Figure 7. Output Current vs. Receiver Output High Voltage
Figure 4. Output Current vs. Receiver Output Low Voltage
3.3
0.8
0.7
3.25
0.6
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
1
OUTPUT HIGH VOLTAGE (V)
OUTPUT VOLTAGE (V)
0.5
IRO = 2.5mA
0.4
0.3
3.2
IRO = –1.5mA
3.15
3.1
0.2
05234-017
0
–40
–20
0
20
40
60
80
3
–40
100
05234-020
3.05
0.1
–20
0
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 8. Receiver Output High Voltage vs. Temperature
Figure 5. Receiver Output Low Voltage vs. Temperature
2.6
120
2.5
OUTPUT VOLTAGE (V)
2.4
80
60
40
2.2
2.1
2.0
1.9
0
0.5
1
1.5
2
DIFFERENTIAL O/P VOLTAGE (V)
2.5
3
05234-021
0
2.3
1.8
20
05234-018
OUTPUT CURRENT (mA)
100
1.7
1.6
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 9. Driver Differential Output Voltage vs. Temperature
Figure 6. Output Current vs. Driver Differential Output Voltage
Rev. C | Page 7 of 16
100
ADM3491-1
Data Sheet
1.2
[
]
100FT CAT 5
CABLE
T
1.1
3
T
1
T
0.9
1
2
0.7
–40
–20
0
20
40
60
80
T
4
100
CH1 1.00V
CH3 2.00V
TEMPERATURE (C)
Figure 10. Supply Current vs. Temperature
[
T
05234-024
05234-022
0.8
CH2 1.00V
CH4 2.00V
M40.0ns CH3
640mV
Figure 12. Driving 100 ft. Cable H-L Transition
100
]
100FT
CABLE
T
T
1
2
T
T
4
CH1 1.00V
CH3 2.00V
CH2 1.00V
CH4 2.00V
M40.0ns CH3
80
70
60
50
40
30
20
05234-025
3
SHUTDOWN CURRENT (mA)
90
10
05234-023
SUPPLY CURRENT (mA)
T
0
–40
640mV
–20
0
20
40
TEMPERATURE (C)
60
Figure 13. Shutdown Current vs. Temperature
Figure 11. Driving 100 ft. Cable L-H Transition
Rev. C | Page 8 of 16
80
Data Sheet
ADM3491-1
TEST CIRCUITS
R/2
CL1
DI
VCC
RLDIFF
D
05234-004
VOC
R/2
VOUT
CL2
05234-006
VOD
Figure 18. Driver Differential Output Delay Test Circuit
Figure 14. Driver Voltage Measurement Test Circuit
375Ω
VOM
RL
DE
IN
375Ω
VOUT
CL
05234-010
VTST
RL
05234-008
VOD3
S1
VCC
Figure 15. Driver Voltage Measurement Test Circuit 2
Figure 19. Driver Propagation Delay Test Circuit
VCC
DE
DI
S2
CL
VOUT
DE IN
CL1
A
B
RO
R
CL2
Figure 16. Driver Enable/Disable Test Circuit
RE
Figure 20. Driver/Receiver Propagation Delay Test Circuit
VCC
+1.5V
RLDIFF
D
3V
–1.5V
RE IN
VID
S2
CL
VOUT
05234-009
RL
RE
1.5V
Figure 17. Receiver Enable/Disable Test Circuit
RE
CL
VOUT
05234-011
0V
S1
05234-007
RL
S1
05234-005
0V OR 3V
Figure 21. Receiver Propagation Delay Test Circuit
Rev. C | Page 9 of 16
ADM3491-1
Data Sheet
SWITCHING CHARACTERISTICS
3V
3V
1.5V
Z
1.5V
1.5V
0V
tPLH
0V
DE
1.5V
tPHL
tZL
1/2VO
tLZ
VO
VO
90% POINT
1.5V
Y/Z
tSKEW
tSKEW
90% POINT
O/P
LOW
VOL + 0.25V
VOL
tHZ
tZH
10% POINT
10% POINT
tR
tF
VOH
O/P HIGH
Y/Z
VOH – 0.25V
1.5V
0V
Figure 24. Driver Enable/Disable Timing
Figure 22. Driver Propagation Delay, Rise/Fall Timing
3V
A–B
RE
0V
0V
1.5V
1.5V
0V
tZL
tPHL
VOH
RO
tLZ
1.5V
1.5V
VOL
1.5V
RO
O/P
LOW
VOL + 0.25V
VOL
tHZ
tZH
VOH
O/P HIGH
RO
1.5V
VOH – 0.25V
0V
Figure 23. Receiver Propagation Delay
Figure 25. Receiver Enable/Disable Timing
Rev. C | Page 10 of 16
05234-015
tPLH
05234-013
–VO
05234-012
0V
05234-014
Y
Data Sheet
ADM3491-1
THEORY OF OPERATION
DIFFERENTIAL DATA TRANSMISSION
Differential data transmission is used to reliably transmit data at
high rates over long distances and through noisy environments.
Differential transmission nullifies the effects of ground shifts and
noise signals that appear as common-mode voltages on the line.
As with any transmission line, it is important that reflections
be minimized. This can be achieved by terminating the extreme
ends of the line using resistors equal to the characteristic
impedance of the line. Stub lengths of the main line should
also be kept as short as possible. A properly terminated
transmission line appears purely resistive to the driver.
The two main standards approved by the EIA specify the
electrical characteristics of transceivers used in differential
data transmission:
RECEIVER OPEN-CIRCUIT FAIL-SAFE FEATURE
RS-422 standard specifies data rates up to 10 MBaud and
line lengths up to 4000 ft. A single driver can drive a
transmission line with up to 10 receivers.
The receiver input includes a fail-safe feature that guarantees a
logic high on the receiver when the inputs are open circuit or
floating.
0.1µF
RS-485 standard was defined to cater to true multipoint
communications. This standard meets or exceeds all the
requirements of RS-422, but also allows multiple drivers
and receivers to be connected to a single bus. An extended
common-mode range of −7 V to +12 V is defined.
RE
RS-485
Differential
4000 ft.
±1.5 V
54 Ω
12 kΩ min
±200 mV
−7 V to +12 V
CABLE AND DATA RATE
VCC
VCC
R
A
Y
B
Z
ADM3491-1
DI
DE
DI
D
RS-485/RS-422 LINK
D
ADM3491-1
Z
B
Y
A
RO
R
RE
DE
GND
05234-026
GND
Figure 26. ADM3491-1 Full-Duplex Data Link
Table 6. Comparison of RS-422 and RS-485 Interface Standards
RS-422
Differential
4000 ft.
±2 V
100 Ω
4 kΩ min
±200 mV
−7 V to +7 V
0.1µF
RO
The most significant differentiator of the RS-485 standard is
that the drivers can be disabled, thereby allowing more than one
to be connected to a single line. Only one driver should be
enabled at a time, but the RS-485 standard contains additional
specifications to guarantee device safety in the event of line
contention.
Specification
Transmission Type
Maximum Cable Length
Minimum Driver Output Voltage
Driver Load Impedance
Receiver Input Resistance
Receiver Input Sensitivity
Receiver Input Voltage Range
3.3V
3.3V
Table 7. Transmitting Truth Table
RE
Inputs
DE
DI
Z
X
X
0
1
1
1
0
0
1
0
X
X
0
1
Hi-Z
Hi-Z
Outputs
Y
1
0
Hi-Z
Hi-Z
Table 8. Receiving Truth Table
The transmission line of choice for RS-485 communications is a
twisted pair. Twisted pair cable tends to cancel common-mode
noise and also causes cancellation of the magnetic fields generated by the current flowing through each wire, thereby reducing
the effective inductance of the pair.
The ADM3491-1 is designed for bidirectional data communications on multipoint transmission lines. A typical application
showing a multipoint transmission network is illustrated in
Figure 26. Only one driver can transmit at a particular time, but
multiple receivers can be enabled simultaneously.
RE
DE
Inputs
A–B
Outputs
RO
0
0
0
1
X
X
X
X
≥ +0.2 V
≤ −0.2 V
Inputs O/C
X
0
0
1
Hi-Z
Rev. C | Page 11 of 16
ADM3491-1
Data Sheet
OUTLINE DIMENSIONS
0.775 (19.69)
0.750 (19.05)
0.735 (18.67)
14
8
1
0.280 (7.11)
0.250 (6.35)
0.240 (6.10)
7
0.325 (8.26)
0.310 (7.87)
0.300 (7.62)
PIN 1
0.100 (2.54)
BSC
0.060 (1.52)
MAX
0.210
(5.33)
MAX
0.195 (4.95)
0.130 (3.30)
0.115 (2.92)
0.015
(0.38)
MIN
0.150 (3.81)
0.130 (3.30)
0.110 (2.79)
0.015 (0.38)
GAUGE
PLANE
SEATING
PLANE
0.022 (0.56)
0.018 (0.46)
0.014 (0.36)
0.014 (0.36)
0.010 (0.25)
0.008 (0.20)
0.430 (10.92)
MAX
0.005 (0.13)
MIN
0.070 (1.78)
0.050 (1.27)
0.045 (1.14)
COMPLIANT TO JEDEC STANDARDS MS-001-AA
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
CORNER LEADS MAY BE CONFIGURED AS WHOLE OR HALF LEADS.
Figure 27. 14-Lead Plastic Dual In-Line Package [PDIP]
Narrow Body
(N-14)
Dimensions shown in inches and (millimeters)
8.75 (0.3445)
8.55 (0.3366)
4.00 (0.1575)
3.80 (0.1496)
14
8
1
7
6.20 (0.2441)
5.80 (0.2283)
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0039)
COPLANARITY
0.10
0.50 (0.0197)
45°
0.25 (0.0098)
1.75 (0.0689)
1.35 (0.0531)
0.51 (0.0201)
0.31 (0.0122)
SEATING
PLANE
8°
0.25 (0.0098) 0° 1.27 (0.0500)
0.40 (0.0157)
0.17 (0.0067)
COMPLIANT TO JEDEC STANDARDS MS-012-AB
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 28. 14-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-14)
Dimensions shown in millimeters and (inches)
5.10
5.00
4.90
16
9
4.50
4.40
4.30
6.40
BSC
1
8
PIN 1
1.20
MAX
0.15
0.05
0.65
BSC
0.30
0.19
COPLANARITY
0.10
0.20
0.09
SEATING
PLANE
8°
0°
0.75
0.60
0.45
COMPLIANT TO JEDEC STANDARDS MO-153-AB
Figure 29. 16-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-16)
Dimensions shown in millimeters
Rev. C | Page 12 of 16
Data Sheet
ADM3491-1
ORDERING GUIDE
Model1
ADM3491ANZ-1
ADM3491AR-1
ADM3491ARZ-1
ADM3491ARZ-1REEL
ADM3491ARZ-1REEL7
ADM3491ARU-1
ADM3491ARU-1REEL
ADM3491ARUZ-1
ADM3491ARUZ-1REEL
ADM3491ARUZ-1REEL7
1
Temperature Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Package Description
14-Lead Plastic DIP
14-Lead Narrow Body Small Outline [SOIC]
14-Lead Narrow Body Small Outline [SOIC]
14-Lead Narrow Body Small Outline [SOIC]
14-Lead Narrow Body Small Outline [SOIC]
16-Lead Thin Shrink Small Outline [TSSOP]
16-Lead Thin Shrink Small Outline [TSSOP]
16-Lead Thin Shrink Small Outline [TSSOP]
16-Lead Thin Shrink Small Outline [TSSOP]
16-Lead Thin Shrink Small Outline [TSSOP]
Z = RoHS Compliant Part.
Rev. C | Page 13 of 16
Package
Option
N-14
R-14
R-14
R-14
R-14
RU-16
RU-16
RU-16
RU-16
RU-16
Ordering Quantity
2,500
1,000
2,500
2,500
1,000
ADM3491-1
Data Sheet
NOTES
Rev. C | Page 14 of 16
Data Sheet
ADM3491-1
NOTES
Rev. C | Page 15 of 16
ADM3491-1
Data Sheet
NOTES
©1998–2014 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05234-0-6/14(C)
Rev. C | Page 16 of 16