ADC0838 Micro Linear Corporation, ADC0838 Datasheet - Page 19

• Manufacturer Part Number: ADC0838
• Description: Serial I/O 8-Bit A/D Converters with Multiplexer Options
• Manufacturer: Micro Linear Corporation

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