AD9071

–4–

REV. B

ORDERING GUIDE

Model

Temperature Range

Package Description

Package Option

AD9071BR

–40

°C to +85°C

28-Lead Wide Body (SOIC)

R-28

AD9071/PCB

+25

°C

Evaluation Board

Table I. Output Coding

Offset

Code

AIN–

AIN

Binary

OR

1023

≥ 0.512 V

11 1111 1111

1

1023

0.511 V

11 1111 1111

0

1022

0.510 V

11 1111 1110

0

••

•

•

••

•

•

••

•

•

513

0.001 V

10 0000 0001

0

512

0.000 V

10 0000 0000

0

511

–0.001 V

01 1111 1111

0

••

•

•

••

•

•

••

•

•

1

–0.511 V

00 0000 0001

0

0

–0.512 V

00 0000 0000

0

0

≤–0.513 V

00 0000 0000

1

PIN FUNCTION DESCRIPTIONS

Pin No.

Name

Function

1, 7, 12, 21, 23

GND

Ground.

2, 8, 11

Analog Power Supply. Nominally 5.0 V. (Tie together to prevent a possible latch-up condition.)

3

VREF OUT

4

VREF IN

5, 6

DNC

Do Not Connect.

9

AIN

Analog Input – Complementary.

10

AIN

Analog Input – True.

13

ENCODE

Encode clock for ADC. (ADC Samples on Rising Edge of ENCODE.)

14

OR

Out-of-Range Output. Goes HIGH when the converted sample is more positive than

15–19, 24–28

D9–D0

Digital outputs of ADC. D9 is the MSB. Data is offset binary.

20, 22

Digital Output Power Supply. User selectable range from 3 V to 5 V.

PIN CONFIGURATION

14

13

12

11

10

9

8

2

3

4

7

6

5

1

TOP VIEW

(Not to Scale)

17

16

15

20

19

18

28

27

26

25

24

23

22

21

AD9071BR

D0

D1

D2

D3

D4

GND

GND

D5

D6

D7

D8

D9 (MSB)

GND

VREF OUT

VREF IN

DNC

DNC

GND

AIN

AIN

GND

ENCODE

OR

DNC = DO NOT CONNECT