AD7714AR-3REEL Analog Devices Inc, AD7714AR-3REEL Datasheet - Page 35
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AD7714AR-3REEL
Manufacturer Part Number
AD7714AR-3REEL
Description
IC ADC 24BIT SIGMA-DELTA 24-SOIC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7714YNZ.pdf
(40 pages)
Specifications of AD7714AR-3REEL
Rohs Status
RoHS non-compliant
Number Of Bits
24
Sampling Rate (per Second)
1k
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
7mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (0.300", 7.50mm Width)
For Use With
EVAL-AD7714-3EBZ - BOARD EVALUATION FOR AD7714
REV. C
Temperature Measurement
Another application area for the AD7714 is in temperature
measurement. Figure 13 outlines a connection from a thermo-
couple to the AD7714. In this application, the AD7714 is oper-
ated in its buffered mode to allow large decoupling capacitors
on the front end to eliminate any noise pickup which there may
THERMOCOUPLE
+V
JUNCTION
AD780
IN
GND
+5V
V
OUT
R
R
Figure 13. Thermocouple Measurement Using the AD7714
C
REF IN (+)
REF IN (–)
C
AGND
AIN2
AIN1
AIN3
AIN4
AIN5
AIN6
AGND
AV
+5V
AV
DD
DGND
DD
1 A
1 A
BUFFER
DV
DD
BUFFER
DV
–35–
SERIAL INTERFACE
DD
A = 1–128
PGA
have been in the thermocouple leads. When the AD7714 is
operated in buffered mode, it has a reduced common-mode
range. In order to place the differential voltage from the thermo-
couple on a suitable common-mode voltage, the AIN2 input of
the AD7714 is biased up at the reference voltage, +2.5 V.
DOUT
REGISTER BANK
AUTO-ZEROED
CHARGE BALANCING A/D
MODULATOR
DIN
CONVERTER
CS
GENERATION
AD7714
CLOCK
SCLK
DIGITAL
FILTER
MCLK OUT
MCLK IN
STANDBY
SYNC
RESET
DRDY
POL
AD7714
2