Cirrus-logic AN31 Manual do Utilizador descarregar pdf (Página 17)

10k

10k

4.096 MHz

10

1

VA+ MDRV+

MDRV-

VD+

BX2

XIN

XOUT

0.1 0.1

TP0610

+

100.1

2

4

+5

+5

-

VREF-

VREF+

6

7

5

3

R1

R3

R2

7.5k

5.0k

7.5k

-5

VA-

VD-

10

-5

0.1 0.1

+

301

4.7 nF

DGND

AIN+

AGND1 AGND2

AIN-

SMODE

SOD

SID

SCLK

DRDY

CS

RST

MICREL

MIC4428

Bridge

Sync

+

_

1X

+

_

25X

Serial

Interface

4-bit D/A

Converter

Gain

Block

1,2,4,8

Σ

IN1

OUT1

IN2

OUT2

2-Channel

Delta-Sigma

Modulator

2

Channel

FIR

Filter

_

.

.

Calibration

BX1

CS5516

470pF

470pF

100k

CS5520

16 or

20 bits

301

4.7 nF

68HC705

50 Conversions/sec before averaging

Figure 13. CDB5516/20 Evaluation Board Circuit.

Bridge Transducer Digitizer Circuits

AN31REV3 17

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 27 28

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