AD7707 Analog Devices, AD7707 Datasheet - Page 44

• Manufacturer Part Number: AD7707
• Manufacturer: Analog Devices

Specifications of AD7707

• Resolution (bits): 16bit
• # Chan: 3
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Bip
• Ain Range: Bip (Vref)/(PGA Gain),Bip 10V,Bip 5.0V,Uni (Vref)/(PGA Gain),Uni 10V,Uni 5.0V
• Adc Architecture: Sigma-Delta
• Pkg Type: SOIC,SOP

AD7707
THERMOCOUPLE
SENSORS
RTD
mV
V
AV
AIN1
AIN2
AIN3
DD
AGND
AD7707
DV
DD
MCLK OUT
AD420
CONTROL
DAC
REF IN(–)
MCLK IN
DGND
REF IN(+)
ROOM
4.7µF
Figure 26. Smart Valve/Actuator Control Using the AD7707
VALVE/ACTUATOR
ACTUATOR/
VALVE
Figure 27. Smart Transmitter Using the AD7707
100kΩ
SMART
+2.5V
Rev. B | Page 44 of 52
±10V
RSENSE
MICROCONTROLLER UNIT
•PID
•RANGE SETTING
•CALIBRATION
•LINEARIZATION
•OUTPUT CONTROL
•SERIAL COMMUNICATION
•HART PROTOCOL
+5V
V
VBIAS
HICOM
LOCOM
AIN2
AIN3
REF IN(+)
REF IN(–)
AGND
DGND
AIN1
CC
AV
AD7707
DD
COM
MAIN TRANSMITTER ASSEMBLY
DV
DD
3V
1.25V
MCLK OUT
MCLK IN
4.7µF
CONTROLLER
0.01µF
MICRO-
V
REF OUT1
REF OUT2
REF IN
C1 C2 C3
CC
0.01µF
2.2µF
AD421
0.1µF
0.0033µF
BOOST
COMP
DRIVE
LOOP
COM
RTN
DN25D
1000pF
0.01µF
1kΩ
4mA
TO
20mA