AD261
–3–
REV. 0
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD261 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ABSOLUTE MAXIMUM RATINGS*
Parameter Conditions Min Typ Max Units
Supply Voltage (+5 V dc
SYS & FLD
) –0.5 +6.0 V
DC Input Voltage (V
IN MAX
) Referred to +5 V dc
SYS & FLD
and 5 V RTN
SYS & FLD
Respectively –0.5 +0.5 V
DC Output Voltage (V
OUT MAX
) Referred to +5 V RTN
SYS & FLD
and 5 V dc
SYS & FLD
Respectively –0.5 +0.5 V
Clamp Diode Input Current (I
IK
) For V
I
< –0.5 V or V
I
> 5 V RTN
SYS & FLD
+0.5 V –25 +25 mA
Clamp Diode Output Current (I
OK
) For V
O
< –0.5 V or V
O
> 5 V RTN
SYS & FLD
+0.5 V –25 +25 mA
Output DC Current, per Pin (I
OUT
) –25 +25 mA
DC Current, V
CC
or GND (I
CC
or I
GND
) –50 +50 mA
Storage Temperature (T
STG
) –40 +85 °C
Lead Temperature (Soldering, 10 sec) +300 °C
Electrostatic Protection (V
ESD
) Per MIL-STD-883, Method 3015 4.5 5
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 sections of this specification is not implied. Exposure to absolute maximum ratings for extended
periods may effect device reliability.
I/O CONFIGURATIONS AVAILABLE
The AD261 is available in several configurations. The choice of
model is determined by the desired number of input vs. output
lines. All models have identical footprints with the power and
enable pins always being in the same locations.
PIN CONFIGURATION
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
SYSTEM
FIELD
BOTTOM VIEW
S0
S1
S2
S3
S4
ENABLE
SYS
+5V dc
SYS
5V RTN
SYS
5V RTN
FLD
+5V dc
FLD
ENABLE
FLD
F0
F1
F2
F3
F4
ORDERING GUIDE
Model Isolation Package Package
Number Description Ratings Description Option
AD261AND-0 0 Inputs, 5 Outputs 1.75 kV rms Plastic DIP ND-22A
AD261AND-1 1 Input, 4 Outputs 1.75 kV rms Plastic DIP ND-22A
AD261AND-2 2 Inputs, 3 Outputs 1.75 kV rms Plastic DIP ND-22A
AD261AND-3 3 Inputs, 2 Outputs 1.75 kV rms Plastic DIP ND-22A
AD261AND-4 4 Inputs, 1 Output 1.75 kV rms Plastic DIP ND-22A
AD261AND-5 5 Inputs, 0 Outputs 1.75 kV rms Plastic DIP ND-22A
AD261BND-0 0 Inputs, 5 Outputs 3.5 kV rms Plastic DIP ND-22A
AD261BND-1 1 Input, 4 Outputs 3.5 kV rms Plastic DIP ND-22A
AD261BND-2 2 Inputs, 3 Outputs 3.5 kV rms Plastic DIP ND-22A
AD261BND-3 3 Inputs, 2 Outputs 3.5 kV rms Plastic DIP ND-22A
AD261BND-4 4 Inputs, 1 Output 3.5 kV rms Plastic DIP ND-22A
AD261BND-5 5 Inputs, 0 Outputs 3.5 kV rms Plastic DIP ND-22A
PIN FUNCTION DESCRIPTIONS
Pin Mnemonic Function
1–5* S0 Through S4 Digital Xmt or Rcv from F0 Through F4
6 ENABLE
SYS
System Output Enable/Three-State
7 +5 V dc
SYS
System Power Supply (+5 V dc Input)
8 5 V RTN
SYS
System Power Supply Common
9–14 Not Present On Unit
15 5 V RTN
FLD
Field Power Supply Common
16 +5 V dc
FLD
Field Power Supply (+5 V Input)
17 ENABLE
FLD
Field Output Enable/Three-State
18–22* F0 Through F4 Digital Xmt or Rcv from S0 Through S4
*Function of pin determined by model. Refer to Table I.
