LT1012_15 Datasheet, PDF (15/20 Pages) Linear Technology – Picoamp Input Current, Microvolt Offset, Low Noise Op Amp

TYPICAL APPLICATIO S
Air Flow Detector
15V
15V
+
R1
TYPE J
1k
–
R2
10M
1 _100k
2
–
LT1012
8
7
6
OUT
3₊3 ₄
COLD
JUNCTION
AT AMBIENT
– 15V
MOUNT R1 IN AIRFLOW.
ADJUST R2 SO OUTPUT GOES
HIGH WHEN AIRFLOW STOPS
LT1012A • TA11
LT1012A/LT1012
Input Amplifier for 4.5 Digit Voltmeter
15V
IN
0.1V
1V
9M
10V
900k
100V
90k
2_–
7
0.1V
100k
5%
6
LT1012
3₊
4
1V
10V
5
9k*
–15V
100V
1000pF
1000V
TO 1V FULL SCALE
ANALOG TO DIGITAL
1k*
CONVERTER
1000V
* RATIO MATCH ±0.01%
10k
FN507
ALLEN BRADLEY
DECADE VOLTAGE
DIVIDER
THIS APPLICATION REQUIRES LOW
BIAS CURRENT AND OFFSET VOLTAGE,
LOW NOISE, AND LOW DRIFT WITH
TIME AND TEMPERATURE
LT1012A • TA12
Resistor Multiplier
R_IN
1G
R1
10M
3₊
LT1012
6
V_OUT
2_–
10k
R2
1k
( ) _R3
R_IN = R1
1+
R3
R2
100k
LT1012 • TA13
“No Trims” 12-Bit Multiplying DAC Output Amplifier
REFERENCE IN
0.1V TO 10V
R_FEEDBACK
I_OUT1
12-BIT CMOS
MULTIPLYING
DAC
I_OUT2
2_–
6
LT1012
OUT
3₊
WHEN THE REFERENCE INPUT DROPS TO 0.1V,
THE LEAST SIGNIFICANT BIT DECREASES TO
THE MICROVOLT/PICOAMPERE RANGE
LT1012 • TA14
sn1012 1012afbs
15