Cirrus Logic CS5581 - Manual (Page 19)

CS5581
DS796PP1 19
3/25/08
14:34
The following figure depicts the CS5581 part powered from a single 5V analog supply and configured for
bipolar measurement, referenced to a common mode voltage of 2.5 V.
Figure 8. CS5581 Configured for Bipolar Measurement Using a Single 5V Analog Supply
ACOM
AIN
SMODE
CS
4 SCLK
4 SDO
RDY
CONV
BP/UP
MCLK
RST
TST
VREF-
VREF+ +4.096
Voltage
Reference
(NOTE 1)
+5 V
BUFEN
1. See Section 3.3 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
4700pF
C0G
0.458 to 4.548 V
CS5571
49.9
150pF
2k
4700pF
C0G
Common Mode Voltage
(2.5 V Typ.)
VLR2
50
VLR3
CS3003 / CS3004
CS3003 / CS3004
CS5581
CS5581