APPLICATIONS (Continued)
ML2281, ML2282, ML2284, ML2288
VCC
(5VDC)
+
VIN
VIN (+)
VCC
ML2281
+
10µF
10kΩ
FS
ADJ.
1.2kΩ
VIN (–)
VREF
SETS ZERO
CODE VOLTAGE
330Ω
2.7kΩ
1kΩ
2VDC
ZERO ADJ.
1kΩ
3V
+
1µF
SET
VOLTAGE SPAN
10V
STRAIN GAUGE
LOAD CELL
300Ω/30mV FS
330Ω
6.8kΩ
5.1V
1kΩ
GAIN
2.7kΩ
10kΩ
+
VCC
–
VREF
CLK
DUAL
1MΩ
ML2281 CS
+
–IN
–
DUAL
+IN
DO
1MΩ 20kΩ
10V
10kΩ
OFFSET
20kΩ
• USES ONE MORE WIRE THAN LOAD CELL ITSELF
• TWO MINI-DIPs COULD BE MOUNTED INSIDE LOAD CELL
FOR DIGITAL OUTPUT TRANSDUCER
• ELECTRONIC OFFSET AND GAIN TRIMS RELAX MECHANICAL
SPECS FOR GAUGE FACTOR AND OFFSET
• LOW LEVEL CELL OUTPUT IS CONVERTED IMMEDIATELY FOR
HIGH NOISE IMMUNITY
Zero-Shift and Span Adjust: 2V - VIN - 5V
Digital Load Cell
tREF
+ TYPE J
T1 –
+
1kΩ
–
88.2k
CH0
VCC
VCC
2kΩ
22kΩ
1kΩ 910Ω
TL064
+
–
ML2288
CH7
COM
VREF
SERIAL I/O
tREF
+ TYPE J
T8 –
+
1kΩ
–
88.2kΩ
LM335
tREF
TL064
TL064
820Ω
20kΩ
1kΩ 3kΩ VCC
LM385
USES THE PSEUDO-DIFFERENTIAL MODE TO KEEP THE
DIFFERENTIAL INPUTS CONSTANT WITH CHANGES IN REFERENCE TEMPERATURE (TREF)
Convert 8 Thermocouples with only One Cold-Junction Compensator
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