ADR225HRZN Datasheet, PDF (8/12 Pages) Analog Devices – High Temperature, Low Drift, Micropower 2.5 V Reference

ADR225
THEORY OF OPERATION
BASIC VOLTAGE REFERENCE CONNECTIONS
The circuit shown in Figure 16 is the basic configuration for the
ADR225. Note that a 10 µF and 0.1 µF bypass network on the input
and at least a 1 µF bypass capacitor on the output are required for
proper device operation. It is recommended that no connections
be made to Pin 1, Pin 3, Pin 5, Pin 7, and Pin 8.
Data Sheet
10µF 0.1µF
NC 1
8 NC
V_{S 2}
7 NC
ADR225 _OUTPUT
NC 3
6
4
5 _NC
+ _1µF
TANT
+
1µF
NC = NO CONNECT.
Figure 16. Basic Voltage Reference Connections
VCC
+5V
+ _C1
10µF
C2
0.1µF
U1
ADR225
V_S
OUTPUT
GND
+ C3
1µF
V+
+5V
C4
0.1µF
R2
2.5kΩ
R3
2.5kΩ
+IN A
–IN A
U2A
AD8634
–5V
V–
RTD
+V_S
+5V
U3
AD8229
+IN
V_OUT
–IN
R1
2.5kΩ
Figure 17. Typical High Temperature Resistance Temperature Detector (RTD) Signal Conditioning Circuit
–5V
–V_S
Rev. A | Page 8 of 12