12-Bit, 10µS H ybrid AD C

H S AD C85

D ata Converter Line

FEATURES

• –55ºC to +125ºC Operation

• M IL-STD-883 Processing

• 10 µS Conversion Time

• Low Power, 1.32W (max)

• Replacement for A DC85/84 and ADC-HX12B/HZ12B

DESCRIPTION

The HS A DC85 is specifically designed to replace

the A DC581,. A DC85/84 and A DC-HX12B/HZ12B.

Complete with internal clock, reference and input

buffer amplifier, the HS A DC85 can also be used

with an external clock for synchronization (see

EXTERNA L CLOCK section under A PPLICA TIONS

INFORM A TION). Conversion speeds of 10 µs for 12-

Bit operation and 8 µs for 10-Bit operation allows

the HS A DC85 to be used in a wide range of

applications. Short cycle and internal clock rate

may also be externally adjusted to provide faster

conversion speeds at lower resolutions. Gain and

offset can be externally trimmed to zero,

providing full-scale accuracy of ±0.012% ±1/2 LSB.

Data is obtainable in both parallel and serial form

with corresponding clock and status signals.

Digital input and output signals are DTL/TTL

compatible. Other features include:

Low Power — A 33% reduction in power

dissipation allows the HS A DC85 to operate

reliably at high temperatures without failure due

to excessive package heating. Total power

consumed is only 1.32 W maximum.

Selectable Input Ranges — Input scaling resistors

allow the selection of input ranges of ±2.5V , ±5V ,

±10V , 0 to +5V or 0 to +10V .

Reliability — Packaged in a 32-pin hermetically sealed

case and utilizing advanced devices and laser-

trimmed thin film resistors, the HS A DC85 is one of

the most reliable analog-to-digital converters to date.

Specified over the –55ºC to +125ºC temperature

range, it has a low linearity drift specification of only

±2 ppm/ºC maximum. A ll “ B” versions of the HS

A DC85 series are fully screened and tested to M IL-

STD-883 Rev. C, Level B requirements.

20

32

14

21

17

19

18

29

30

STA TUS

SERIA L OUT

SHORT CY CLE

STA RT

CLOCK

RA TE CONTROL

CLOCK

OUT

REF OUT

BUFFER OUT

BUFFER IN

FUNCTIONAL DIAGRAM

13

1

2

3

4

5

6

7

8

9 10 11 12

LSB

M SB M SB

SA R

DA C

COM P

CLOCK

REF

–

+

–

+

26

31

15

16

28

A NA GND

DIG GND

+5V

– 5V

– 15V

27

24

25

23

22

GA IN

10V

20V

BIPOLA R

165Cedar Hill Street,Marlborough,MA01752 Tel:508.485.6350 Fax: 508.485.5168

www.SpectrumMicrowave.com