MAX1492 Maxim, MAX1492 Datasheet - Page 30

• Manufacturer Part Number: MAX1492
• Description: 3.5- and 4.5-Digit / Single-Chip ADCs with LCD Drivers
• Manufacturer: Maxim

3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
Figure 20. Strain-Gauge Application with MAX1492/MAX1494
Figure 22. 4–20mA Transmitter
30
DUMMY
ACTIVE
GAUGE
GAUGE
SENSOR
______________________________________________________________________________________
0.1µF
R
REF
0.1µF
R
R
±1.8.8.8.8
0.1µF
0.1µF
0.1µF
MAX1492
MAX1494
4.7µF
REF+
REF-
AIN+
AIN-
GND
AV
V+
SPI
DD
ANALOG SUPPLY
4
MAX1492
MAX1494
ISOLATION
FERRITE
BARRIER
GND
BEAD
DV
SPI
DD
4
0.1µF
µP/µC
SCLK
DIN
DOUT
CS
EOC
SPI
4.7µF
3
DAC
GND
V+
Figure 21. Thermocouple Application with MAX1492/MAX1494
R
GAIN
MAX6062
THERMOCOUPLE
JUNCTION
+5V
R
R
OFST
FDBK
+2.048V
C
C
0.1µF
SENSOR
TEMP
0.47µF
REGULATOR
VOLTAGE
AIN+
AIN-
REF+
REF-
GND
R
Y
MAX1492
MAX1494
4–20mA LOOP
INTERFACE
R
R
X
SENSE
SPI
V
V
IN+
IN-
µC