CS5516-ASZ 查看數據表（PDF） - Cirrus Logic

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CS5516-ASZ

16/20-bit bridge transducer A/D conveter

Cirrus Logic 

CDB5516/CDB5520

Introduction

Evaluation Board Overview

The CDB5516/20 evaluation board provides a

means of testing the CS5516 and CS5520 bridge

transducer A/D converters. The board is de-

signed to be interfaced to a PC-compatible

computer via an RS-232 port. Software is sup-

plied with the board which provides control of

all registers in the CS5516 or the CS5520.

The board is configured to be operated from +5

and -5 volt power supplies. A bridge transducer

or a bridge transducer simulator is required if the

board is to be evaluated in the ratiometric oper-

ating mode.

Figure 1 illustrates the schematic of the bridge

driver and A/D converter portion of the circuit

board. The converter operates from a 4 MHz

crystal. This results in the converter outputting

conversion words at a 50 Sps rate. The board

comes configured to be interfaced to a bridge

transducer via the 6-pin transducer terminal

block. The sense lines on the transducer termi-

nal block provide the reference voltage for the

converter.

For absolute measurements, the user can connect

either an external reference voltage (up to 3.8

volts) to the reference terminal block or connect

the on-board 2.5 volt LT1019 reference as the

voltage reference for the converter.

EXC GND

+5VA

6

7

EXC

U3

EXC

5

3

MICREL

MIC4428

Q1

TP0610

+5VA

0.1µF C7

3

R1

10

C9

1 1µF 2

20

2

10k

R14

C20

4

C21

10k

+

R15

0.1µF 10 µF

100k

R13

VA+ MDRV+ MDRV- VD+

11

BX2

12

BX1

CS5516/20

XIN 22

0.1µF

C8

P1

SIG+

SIG-

SENSE+

SENSE-

-5VA

EXC+

EXC-

7.5k

R7

5.0k

R6

470pF

C16

7.5k

R4

P2 301 R5

C17 470pF

REF+

REF-

301

4.7nF C15

R3

301

R12

301

R11

1A

1B

2A

2B

C18

4.7nF

4.7nF

C19

6 AIN+

5 AGND1

8

AGND2

7

AIN-

9 VREF+

10 VREF-

VA-

4.000

MHz

XOUT 23

SMODE 24

18

SOD

17

SID

16

SCLK

15

DRDY

14

CS

13

RST

19

DGND

VD-

+5VA

C14

0.1µF

U5

50

LT1019-

2.5V

R8

0.1µF

-5VA

4

C11

0.1µF

R2

21

10

0.1µF

C10

C29

AGND DGND

10k

R17

100k

R16

OSCLK

SMODE

SOD

SID

To

Figure 2

SCLK

DRDY

CS

RST

J1

Figure 1. Bridge Driver and A/D Converter

3322

DS74DB43

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