AD694 datasheet(3/16 Pages) AD

3 / 16 page

Model

AD694JN/AQ/AR

AD694BQ/BR

Min

Typ

Max

Min

Typ

Max

Unit

BUFFER AMPLIFIER

Input Offset Voltage

Initial Offset

±150

500

±50

500

µV

TMIN to TMAX

±2

±3

±2

±3

µV/°C

vs. Supply

vs. Common Mode

Trim Range

2.5

±4.0

2.5

±4.0

Frequency Response

Unity Gain, Small Signal

300

kHz

Input Voltage Noise (0.1 Hz to 10 Hz)

µV p-p

Open-Loop Gain

VO = +10 V, RL

≥ 10 kΩ

V/mV

Output Voltage @ Pin 1, FB

Minimum Output Voltage

1.0

Maximum Output Voltage

VS –2.5 V

VS–2 V

VS –2.5 V

VS –2 V

NOTES

1The single supply op amps of the AD694, lacking pull down current, may not reach 0.000 V at their outputs. For this reason, span, offset, and nonlinearity are

specified with the input amplifiers operating in their linear range. The input voltage used for the tests is 5 mV to 2 V and 5 mV to 10 V for the two precalibrated

input ranges. Span and zero accuracy are tested with the buffer amplifier configured as a follower.

2Offset at 4 mA out and 0 mA out are extrapolated to 0.000 V input from measurements made at 5 mV and at full scale. See Note 1.

3Nonlinearity is specified as the maximum deviation of the output, as a % of span, from a straight line drawn through the endpoints of the transfer function.

4Voltage reference drift guaranteed by the Box Method. The voltage reference output over temperature will fall inside of a box whose length is determined by the

temperature range and whose height is determined by the maximum temperature coefficient multiplied by the temperature span in degrees C.

5Devices tested at these temperatures with a pass transistor. Allowable temperature range of operation is dependent upon internal power dissipation. Absolute

maximum junction and case temperature should not be exceeded. See section: “Power Dissipation Considerations.”

6Buffer amplifier specs for reference. Buffer amplifier offset and drift already included in Span and Zero accuracy specs above.

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.

AD694

–3–

REV. B

PIN CONFIGURATION (N, R, Q PACKAGE)

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V

VS to IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 V

Input Voltage, (Either Input Pin 2 or 3) . . . . . –0.3 V to +36 V

Reference Short Circuit to Common . . . . . . . . . . . . Indefinite

Alarm Voltage, Pin 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V

4 mA Adj, Pin 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 V

4 mA On/Off, Pin 9 . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 36 V

Storage Temperature Range

AD694Q . . . . . . . . . . . . . . . . . . . . . . . . . . –65

°C to +150°C

AD694N, R . . . . . . . . . . . . . . . . . . . . . . . . –65

°C to +125°C

Lead Temperature, 10 sec Soldering . . . . . . . . . . . . . . . 300

°C

Maximum Junction Temperature . . . . . . . . . . . . . . . . . 150

°C

Maximum Case Temperature

Plastic Package (N, R) . . . . . . . . . . . . . . . . . . . . . . . . 125

°C

Cerdip Package (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . 125

°C

ORDERING GUIDE

Temperature

Package

Model

Range

Option

AD694JN

°C to 70°C

N-16

AD694AQ

–40

°C to +85°CQ-16

AD694AR

–40

°C to +85°C

R-16

AD694BQ

–40

°C to +85°CQ-16

AD694BR

–40

°C to +85°C

R-16

*N = Plastic DIP; Q = CERDIP, R = SOIC

Transistor Count: . . . . . . . . . . . . . . . . . . . . . 75 Active Devices

Substrate Connection: . . . . . . . . . . . . . . . . . . . . to Com, Pin 5

Thermal Characteristics:

Plastic (N) Package:

JC = 50

°C/Watt

θCA (Still Air) = 85°C/Watt

Cerdip (Q) Package:

θJC = 30°C/Watt

CA (Still Air) = 70

°C/Watt

Plastic (R) Package:

θJC = 27°C/Watt

θCA (Still Air) = 73°C/Watt

ESD Susceptibility

All pins are rated for a minimum of 4000 V protection, except

for Pins 2, 3 and 9 which are rated to survive a minimum of

1500 V. ESD testing conforms to Human Body Model. Always

practice ESD prevention.

No pin, other than IOUT (11) and

±Sig (2), (3) as noted, may be permitted to become more negative than Com (5). No pin may be

permitted to become more positive than VS (13).

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