Datasheet

AD7747
Rev. 0 | Page 26 of 28
TYPICAL APPLICATION DIAGRAM
0
5469-029
VIN (+)
VDD
CIN1(+)
VIN (–)
SHLD
GND
SDA
SCL
RDY
CIN1(–)
REFIN(+) REFIN(–)
TEMP
SENSOR
24-BIT Σ-Δ
GENERATOR
DIGITAL
FILTER
I
2
C
SERIAL
INTERFACE
EXCITATION
CONTROL LOGIC
CALIBRATION
VOLTAGE
REFERENCE
CAP DAC 1
CAP DAC 2
CLOCK
GENERATOR
MUX
AD7747
HOST
SYSTEM
0.1µF 10µF
3
V
/
5
V
POWER SUPPLY
+
10kΩ
10kΩ
Figure 39. Basic Application Diagram for a Differential Capacitive Sensor