Cirrus Logic CS5529 - Manual (Page 23)

CS5529
DS246F5 23
Power Supply Arrangements
The CS5529 is designed to operate from single or
dual analog supplies and a single digital supply.
The following power supply connections are possi-
ble:
VA+ = +5 V; VA- = 0 V; VD+ = +3 V to +5 V
VA+ = +2.5 V; VA- = -2.5 V; VD+ = +3 V to +5 V
VA+ = +3.0 V; VA- = -3.0 V; VD+ = +3 V
Figure 10 illustrates the CS5529 connected with a
single +5 V supply to measure differential inputs
relative to a common mode of 2.5 V. Figure 11 il-
lustrates the CS5529 connected with ±2.5 V bipolar
Figure 10. CS5529 Configured with a +5.0 V Analog Supply.
XOUT
VD+ VA+
VREF+
VREF-
DGND
AIN+
SCLK
SDO
SDI
CS5529
XIN
CS
+5.0 V
Analog
Supply
20
19
3
2 13
10
11
9
14
15
8
12
Optional Clock
Source
Serial
Data
Interface
32.768 kHz ~ 100 kHz
AIN-
4
18
D3
D2
D1
D0
A1
A0
17
16
7
6
5
VA-
1
±5 V Differential Inputs (Gain Register = 1.0)
±2.5 V Differential Inputs (Gain Register = 2.0)
±1.25 V Differential Inputs (Gain Register = 4.0)
Logic Outputs:
A0, A1 Switch from VA+ to VA-
D0-D3 Switch from VD+ to DGND
+
-
Common Mode = 0 to VA+
0.1 µ F
0.1 µF
10 Ω
Figure 11. CS5529 Configured with ±2.5 V Analog Supplies.
XOUT
VD+ VA+
VREF+
VREF-
DGND
AIN+
SCLK
SDO
SDI
CS5529
XIN
CS
+2.5 V
Analog
Supply
20
19
3
2 13
10
11
9
14
15
8
12
Optional Clock
Source
Serial
Data
Interface
32.768 kHz ~ 100 kHz
AIN-
4
18
D3
D2
D1
D0
A1
A0
17
16
7
6
5
VA-
-2.5 V
Analog
Supply 1
±2.5 V Differential Inputs (Gain Register = 1.0)
±1.25 V Differential Inputs (Gain Register = 2.0)
±625 mV Differential Inputs (Gain Register = 4.0)
+3 V ~ +5 V
Digital
Supply
Logic Outputs:
A0, A1 Switch from VA+ to VA-
D0-D3 Switch from VD+ to DGND
0.1 µF
0.1 µF
0.1 µF