Datasheet

15
sn1012 1012afbs
LT1012A/LT1012
“No Trims” 12-Bit Multiplying DAC Output AmplifierResistor Multiplier
R1
10M
R2
1k
R3
100k
R
IN
= R1
V
OUT
2
3
6
–
+
LT1012
R
IN
1G
LT1012 • TA13
10k
R3
R2
1 +
(
)
Air Flow Detector Input Amplifier for 4.5 Digit Voltmeter
1000pF
15V
–15V
0.1V
1V
10V
100V
1000V
TO 1V FULL SCALE
ANALOG TO DIGITAL
CONVERTER
–
+
2
3
4
5
9k*
LT1012
1k*
* RATIO MATCH ±0.01%
FN507
ALLEN BRADLEY
DECADE VOLTAGE
DIVIDER
THIS APPLICATION REQUIRES LOW
BIAS CURRENT AND OFFSET VOLTAGE,
LOW NOISE, AND LOW DRIFT WITH
TIME AND TEMPERATURE
7
6
100k
5%
IN
0.1V
1V
10V
100V
1000V
9M
900k
90k
10k
LT1012A • TA12
2
1
3
8
7
6
4
3
LT1012A • TA11
–
+
LT1012
COLD
JUNCTION
AT AMBIENT
MOUNT R1 IN AIRFLOW.
ADJUST R2 SO OUTPUT GOES
HIGH WHEN AIRFLOW STOPS
–15V
15V
OUT
R1
1k
15V
+
–
10M
100k
R2
TYPE J
R
FEEDBACK
I
OUT1
I
OUT2
LT1012 • TA14
3
2
6
–
+
LT1012
OUT
WHEN THE REFERENCE INPUT DROPS TO 0.1V,
THE LEAST SIGNIFICANT BIT DECREASES TO
THE MICROVOLT/PICOAMPERE RANGE
REFERENCE IN
0.1V TO 10V
12-BIT CMOS
MULTIPLYING
DAC
TYPICAL APPLICATIO S
U