AD883B datasheet(2/11 Pages) AD

Part #	AD883B

Description	Real-Time Analog Computational Unit ACU

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Manufacturer	AD [Analog Devices]

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–2–

REV. C

AD538–SPECIFICATIONS

AD538AD

AD538BD

AD538SD

Parameters

Conditions

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Units

MULTIPLIER DIVIDER

PERFORMANCE

Nominal Transfer

Function

10 V

≥ V

X, VY, VZ

≥ 0V

O = VY

V

Z

V

X









m

VO = Vy

V

Z

V

X









m

VO = VY

V

Z

V

X









m

400

µA ≥ I

X, IY, IZ

≥ 0V

O = 25 k

Ω × I

Y

I

Z

I

X









m

VO = 25 k

Ω × I

Y

I

Z

I

X









m

VO = 25 k

Ω × I

Y

I

Z

I

X









m

Total Error Terms

100 mV

≤ V

X

≤ 10 V

±0.5

1

± 0.25

0.5

± 0.5

1

% of Reading +

100:1 Input Range

1

100 mV

≤ V

Y

≤ 10 V

±200

500

± 100

250

± 200

500

µV

100 mV

≤ V

Z

≤ 10 V

VZ

≤ 10 V

X, m = 1.0

TA = TMIN to TMAX

±1

2

± 0.5

1

± 1.25

2.5

% of Reading +

±450

750

± 350

500

± 750

1000

µV

Wide Dynamic Range2

10 mV

≤ V

X ≤ 10 V

±1

2

± 0.5

1

± 1

2

% of Reading +

1 mV

≤ V

Y ≤ 10 V

±200

500

± 100

250

± 200

500

µV +

0 mV

≤ V

Z ≤ 10 V

±100

250

± 750

150

± 200

250

µV × (V

Y + VZ)/VX

VZ ≤ 10 VX, m = 1.0

TA = TMIN to TMAX

±1

3

± 1

2

± 2

4

% of Reading +

±450

750

± 350

500

± 750

1000

µV +

±450

750

± 350

500

± 750

1000

µV × (V

Y + VZ)/VX

Exponent (m) Range

TA = TMIN to TMAX

0.2

5

0.2

5

0.2

5

OUTPUT

CHARACTERISTICS

Offset Voltage

VY = 0, VC = –600 mV

±200

500

± 100

250

± 200

500

µV

TA = TMIN to TMAX

±450

750

± 350

500

± 750

1000

µV

Output Voltage Swing

RL = 2 k

Ω

–11

+11

–11

+11

–11

+11

V

Output Current

5

10

5

10

5

10

mA

FREQUENCY RESPONSE

Slew Rate

1.4

V/

µs

Small Signal Bandwidth

100 mV

≤ 10 V

Y, VZ,

400

kHz

VX ≤ 10 V

VOLTAGE REFERENCE

Accuracy

VREF = 10 V or 2 V

±25

50

± 15

25

± 25

50

mV

Additional Error

TA = TMIN or TMAX

±20

30

± 20

30

± 30

50

mV

Output Current

VREF = 10 V to 2 V

1

2.5

1

2.5

1

2.5

mA

Power Supply Rejection

+2 V = VREF

±4.5 V ≤ V

S ≤ ± 18 V

300

600

300

600

300

600

µV/V

+10 V = VREF

±13 V ≤ V

S ≤ ± 18 V

200

500

200

500

200

500

µV/V

POWER SUPPLY

Rated

RL = 2 kΩ±15

± 15

V

Operating Range

3

4.5

18

4.5

18

4.5

18

V

PSRR

±4.5 V < V

S < ± 18 V

0.5

0.1

0.05

0.1

0.5

0.1

%/V

VX = VY = VZ = 1 V

VOUT = 1 V

Quiescent Current

4.5

7

4.5

7

4.5

7

mA

TEMPERATURE RANGE

Rated

–25

+85

–25

+85

–55

+125

°C

Storage

–65

+150

–65

+150

–65

+150

°C

PACKAGE OPTIONS

Ceramic (D-18)

AD538AD

AD538BD

AD538SD

AD538SD/883B

Chips

AD538ACHIPS

NOTES

1Over the 100 mV to 10 V operating range total error is the sum of a percent of reading term and an output offset. With this input dynamic range the input offset

contribution to total error is negligible compared to the percent of reading error. Thus, it is specified indirectly as a part of the percent of reading error.

2The most accurate representation of total error with low level inputs is the summation of a percent of reading term, an output offset and an input offset multiplied by

the incremental gain (VY + VZ) VX.

3When using supplies below

± 13 V, the 10 V reference pin must be connected to the 2 V pin in order for the AD538 to operate correctly.

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.

(VS =

15 V, TA = +25 C unless otherwise noted)

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