ML2281, ML2282, ML2284, ML2288
APPLICATIONS (Continued)
330Ω
V
(5V
CC
DC
10V
)
6.8kΩ
5.1V
V
1kΩ
GAIN
V
CC
+
–
V
(+)
V
CLK
REF
IN
CC
+
STRAIN GAUGE
LOAD CELL
300Ω/30mV FS
+
10µF
V
IN
DUAL
10kΩ
FS
ADJ.
2.7kΩ
10kΩ
1.2kΩ
1MΩ
ML2281
CS
ML2281
+
–
–IN
+IN
1kΩ
DUAL
SET
DO
V
(–)
V
IN
VOLTAGE SPAN
REF
3V
+
1µF
20kΩ
1MΩ
10V
SETS ZERO
CODE VOLTAGE
330Ω
10kΩ
OFFSET
1kΩ
2V
2.7kΩ
DC
ZERO ADJ.
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
Digital Load Cell
Zero-Shift and Span Adjust: 2V - V - 5V
IN
t
REF
TYPE J
+
–
+
–
CH0
V
T
1kΩ
1
CC
88.2k
ML2288
CH7
SERIAL I/O
1kΩ 910Ω
V
CC
2kΩ
TL064
+
22kΩ
COM
V
REF
–
LM335
t
REF
TL064
TL064
TYPE J
–
+
–
+
+
–
+
–
t
T
1kΩ
REF
8
88.2kΩ
20kΩ
820Ω
V
CC
3kΩ
1kΩ
LM385
USES THE PSEUDO-DIFFERENTIAL MODE TO KEEP THE
DIFFERENTIAL INPUTS CONSTANT WITH CHANGES IN REFERENCE TEMPERATURE (T
)
REF
Convert 8 Thermocouples with only One Cold-Junction Compensator
19
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
