–4–

REV. A

AD2S93

ORDERING GUIDE

Temperature

Package

Model

Range

Linearity

Option

AD2S93AP

–40

°C to +85°C

0.1%

P-28A

AD2S93BP

–40

°C to +85°C

0.05%

P-28A

PIN DESIGNATIONS

Pin

No.

Mnemonic

Description

1

AGND

Analog Ground.

2

DIFF

Output of Signal Input Preamplifier.

3

GAIN

Connect GAIN Pin to DIFF for

nominal

× 1. Gains greater than

1 can be resistively scaled.

Do not leave unconnected.

4

LOS

Denotes A or B lines loss of

connection and/or loss of reference

to transducer or converter.

5

DATA

16-bit serial data output 13 bits of

absolute position information plus

overrange and underrange plus LOS.

6

SCLK

Serial Clock. Maximum rate = 2 MHz.

7

CS

Chip Select. Loads serial interface

with current positional information

and enable output.

9, 12

UNR, OVR

Two pins that denote whether the

input signals are underrange or

overrange.

10

CLKOUT

Updates every LSB.

13

NULL

Denotes Null Position.

14

DIR

Indicates direction. DIR is HI for

positive displacement and LO for

negative displacement.

15

DGND

Digital Ground.

16

V

SS

Negative Power Supply –5.0 V dc

± 5%.

17

V

DD

Positive Power Supply +5.0 V dc

± 5%.

18

DEMODOUT Output of the Phase Sensitive

Demodulator.

19

DEMODIN

Input to Phase Sensitive

Demodulator.

20

ACERROR

AC Error Output.

21

VCO GAIN

Sets the VCO gain internally.

Connect to VEL for 2400 LSB/s.

Disconnect for 800 LSB/s.

22

INTIN

Determines system dynamics connect

C and RC (serial) parallel

combination across INTIN and

VEL to determine loop dynamics.

23

VEL

Analog Velocity Output.

24

REF

Single ended input for fixed

amplitude reference.

27, 28 B, A

Uncommitted differential inputs

for the A, B signal inputs.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD2S93 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

RECOMMENDED OPERATING CONDITIONS

Analog Input Voltage (A, B) . . . . . . . . . . . . . . 1 V rms

± 10%

Analog Reference Input (REF) . . . . . . . . . . . . 2 V rms

± 10%

Signal and Reference Harmonic Distortion . . . . . . . . . . . <10%

Operating Temperature Range

Industrial (AP, BP) . . . . . . . . . . . . . . . . . . . –40

°C to +85°C

ABSOLUTE MAXIMUM RATINGS*

Digital Inputs to DGND

CS

Digital Outputs to DGND

Operating Temperature Range

Industrial (A, B) . . . . . . . . . . . . . . . . . . . . . –40

°C to +85°C

Lead Temperature (Soldering 10 sec) . . . . . . . . . . . . . +300

°C

Power Dissipation to +75

°C . . . . . . . . . . . . . . . . . . +100 mW

Derates above +75

°C by . . . . . . . . . . . . . . . . . . . . . 10 mW/°C

permanent damage to the device. This is a stress rating only and functional

operation of the device at these or any other conditions above those indicated in the

operational section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

NC = NO CONNECT

NC

REF

VCOGAIN

ACERROR

DEMODIN

VEL

INTIN

DATA

SCLK

UNR

CLKOUT

NC

CS

NC

26

27

28

4

2

3

15

18

17

16

12

14

13

25

24

21

20

19

23

22

TOP VIEW

(Not to Scale)

1

5

6

9

10

11

7

8

AD2S93