REV. B

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AD1376/AD1377

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© Analog Devices, Inc., 1997

Complete, High Speed

16-Bit A/D Converters

FUNCTIONAL BLOCK DIAGRAM

PRODUCT DESCRIPTION

The AD1376/AD1377 are high resolution, 16-bit analog-to-

digital converters with internal reference, clock and laser-trim-

med thin-film applications resistors. They are packaged in a

compact 32-pin, ceramic scam sealed (hermetic) dual-in-line

packages (DIP). Thin-film scaling resistors provide bipolar

input ranges of

±2.5 V, ±5 V, ±10 V and unipolar input ranges

of 0 V to +5 V, 0 V to +10 V and 0 V to +20 V.

Digital output data is provided in parallel and serial form with

corresponding clock and status outputs. All digital inputs and

outputs are TTL compatible.

APPLICATIONS

The AD1376/AD1377 are excellent for use in high resolution

applications requiring moderate speed and high accuracy or

FEATURES

Complete 16-Bit Converters with Reference and Clock

0.003% Maximum Nonlinearity

No Missing Codes to 14 Bits over Temperature

Fast Conversion

17

s to 16 Bits (AD1376)

10

s to 16 Bits (AD1377)

Short Cycle Capability

Adjustable Clock Rate

Parallel and Serial Outputs

Low Power: 645 mW Typical (AD1376)

585 mW Typical (AD1377)

Industry Standard Pinout

stability over commercial (0

°C to +70°C) temperature ranges

(for extended temperature ranges, the pin compatible AD1378

is recommended.) Typical applications include medical and

analytic instrumentation, precision measurement for industrial

robotics, automatic test equipment (ATE), and multichannel

data acquisition systems, servo control systems or anywhere

wide dynamic range is required A proprietary monolithic DAC

and laser-trimmed thin-film resistors guarantee a maximum

nonlinearity of

±0 003% (1/2 LSB

short cycled to achieve faster conversion times – 15

µs to 14 bits

for the AD1376, or 8

µs to 14 bits for the AD1377.

PRODUCT HIGHLIGHTS

1. The AD1376/AD1377 provides 16-bit resolution with a maxi-

mum linearity error of

±0.003% (1/2 LSB

2. AD1376 conversion time is 14

µs (typical) short cycled to 14

bits, and 16

µs to 16 bits.

3. AD1377 conversion time is 8

µs (typical) short cycled to 14

bits, and 9

µs to 16 bits.

4. Two binary codes are available on the digital output. They are

CSB (Complementary Straight Binary) for unipolar input

voltage ranges and COB (Complementary Offset Binary) for

bipolar input ranges. Complementary Twos Complement

(CTC) coding may be obtained by inverting Pin 1 (MSB).

5. The AD1376 and AD1377 include internal reference and

clock, with external clock rate adjust pin, and serial and paral-

lel digital outputs.