CS5571

18

DS768A5

6/25/07

14:12

The following figure depicts the CS5571 part powered from a single 5V analog supply and configured for

unipolar measurement.

Figure 6. CS5571 Configured for Unipolar Measurement Using

a Single 5V Analog Supply

ACOM

AIN

SMODE

CS

RDY

CONV

CAL

BP/UP

MCLK

DITHER

RST

TST

VREF-

VREF+

+4.096

Voltage

Reference

(NOTE 1)

+5 V

BUFEN

1. See Section 3.4 Voltage Reference for information on

required voltage reference performance criteria.

2. Locate capacitors so as to minimize loop length.

3. V1-, V2-, and VLR should be connected to the same

ground plane under the chip.

4. SCLK and SDO may require pull-down resistors in

some applications.

NOTES

0.1 µF

(V-) Buffers Off

(V+) Buffers On

0.1 µF

10 µF

V1+

V2+

V1-

V2-

VL

VLR

DCR

+5 V

+3.3 V to 1.8 V

0.1 µF

0.1 µF

X7R

0.1 µF

10

49.9

150pF

2k

2200pF

C0G

0 V to +2.048 V

CS5571