AD596 datasheet(2/8 Pages) AD

2 / 8 page

AD596/AD597–SPECIFICATIONS

(@ +60 C and VS = 10 V, Type J (AD596), Type K (AD597) Thermocouple,

unless otherwise noted)

REV. B

–2–

Model

AD596AH

AD597AH

AD597AR

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Units

ABSOLUTE MAXIMUM RATINGS

+VS to –VS

Volts

Common-Mode Input Voltage

(–VS – 0.15)

+VS

(–VS – 0.15)

+VS

(–VS – 0.15)

+VS

Volts

Differential Input Voltage

–VS

+VS

–VS

+VS

–VS

+VS

Volts

Alarm Voltages

+ALM

–VS

(–VS +36)

–VS

(–VS +36)

–VS

(–VS +36)

Volts

–ALM

–VS

+VS

–VS

+VS

–VS

+VS

Volts

Operating Temperature Range

–55

+125

–55

+125

–40

+125

°C

Output Short Circuit to Common

Indefinite

TEMPERATURE MEASUREMENT

(Specified Temperature Range

+25

°C to +100°C)

Calibration Error1

–4

°C

Stability vs. Temperature2

±0.02 ±0.05

°C/°C

Gain Error

–1.5

+1.5

–1.5

+1.5

–1.5

+1.5

Nominal Transfer Function

mV/

°C

AMPLIFIER CHARACTERISTICS

Closed Loop Gain3

180.6

245.5

V/V

Input Offset Voltage

°C × 53.21 + 235

°C × 41.27 – 37

µV

Input Bias Current

0.1

µA

Differential Input Range

–10

+50

–10

+50

–10

+50

Common-Mode Range

(–VS – 0.15)

(+VS – 4)

(+VS – 0.15)

(+VS – 4)

(–VS – 0.15)

(+VS – 4)

Volts

Common-Mode Sensitivity–RTO

mV/V

Power Supply Sensitivity–RTO

mV/V

Output Voltage Range

Dual Supplies

(–VS + 2.5)

(+VS – 2)

(–VS + 2.5)

(+VS – 2)

(–VS + 2.5)

(+VS – 2)

Volts

Single Supply

(+VS – 2)

Volts

Usable Output Current4

±5

±5mA

3 dB Bandwidth

kHz

ALARM CHARACTERISTICS5

Alarm Function Not Pinned Out

VCE(SAT) at 2 mA

0.3

Volts

Leakage Current

µA

Operating Voltage at – ALM

(+VS – 4)

Volts

Short Circuit Current

POWER REQUIREMENTS

Operating

(+VS to –VS) ≤ 30

Volts

Quiescent Current

+VS

160

300

160

300

160

300

µA

–VS

100

200

100

200

100

200

µA

NOTES

1This is a measure of the deviation from ideal with a measuring thermocouple junction of 175

°C and a chip temperature of 60°C. The ideal transfer function is given by:

AD596: VOUT = 180.57

× (V

m – Va + (ambient in

°C) × 53.21 µV/°C + 235 µV)

AD597: VOUT = 245.46

× (V

m – Va + (ambient in

°C) × 41.27 µV/°C – 37 µV)

where Vm, and Va represent the measuring and ambient temperatures and are taken from the appropriate J or K thermocouple table. The ideal transfer function minimizes the

error over the ambient temperature range of 25

°C to 100°C with a thermocouple temperature of approximately 175°C.

2Defined as the slope of the line connecting the AD596/AD597 CJC errors measured at 25

°C and 100°C ambient temperature.

3Pin 6 shorted to Pin 7.

4Current Sink Capability in single supply configuration is limited to current drawn to ground through a 50 k

Ω resistor at output voltages below 2.5 V.

5Alarm function available on H package option only.

Specifications subject to change without notice.

Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max

specifications are guaranteed, although only those shown in boldface

are tested on all production units.

ORDERING GUIDE

Model

Package Description

Package Options

AD596AH

TO-100

H-10A

AD597AH

TO-100

H-10A

AD597AR*

Plastic SOIC

SO-8

*Consult factory for availability.

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