lt1012a Linear Technology Corporation, lt1012a Datasheet - Page 15

• Manufacturer Part Number: lt1012a
• Description: Picoamp Input Current, Microvolt Offset, Low Noise Op Amp
• Manufacturer: Linear Technology Corporation

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