cs5566 Cirrus Logic, Inc., cs5566 Datasheet - Page 18

• Manufacturer Part Number: cs5566
• Description: ?2.5 V / 5 V, 5 Ksps, 24-bit ?? Adc
• Manufacturer: Cirrus Logic, Inc.

3.7 Typical Connection Diagrams
The following figure depicts the CS5566 powered from bipolar analog supplies, +2.5 V and - 2.5 V.
18
R
R
1
1
C
C
1
1
Figure 8. CS5566 Configured Using ± 2.5V Analog Supplies
Reference
(NOTE 1)
47pF
47pF
Voltage
4.99k
4.99k
+4.096
4.99k
4.99k
+2.5 V
-2.5 V
49.9
49.9
+2.048 V
+2.048 V
-2.048 V
-2.048 V
0 V
0 V
10 µF
(V+) Buffers On
(V-) Buffers Off
47 µF
3/25/08
4700pF
4700pF
0.1 µF
C0G
C0G
0.1 µF
NOTES
1. See Section 3.3 Voltage Reference for information on required
2.Locate capacitors so as to minimize loop length.
3. The ±2.5 V supplies should also be bypassed to ground at the converter.
4. VLR and the power supply ground for the ±2.5 V should be
5. SCLK and SDO may require pull-down resistors in some applications.
6. An RC input filter can be used to band limit the input to reduce noise.
+2.5 V
-2.5 V
voltage reference performance criteria.
connected to the same ground plane under the chip.
Select R to be equal to the parallel combination of the feedback of the
feedback resistors 4.99k || 4.99k = 2.5k0 0
BUFEN
VREF+
VREF-
AIN-
AIN+
0.1 µF
10
10
0.1 µF
X7R
V1+
V2+
V2-
DCR
V1-
CS5566
VLR2
SMODE
VLR
SLEEP
+3.3 V to +1.8 V
5
BP/UP
CONV
MCLK
SCLK
5
VL
SDO
RDY
RST
TST
CS
0.1 µF
50
CS5566
DS806PP1