Datasheet

LTC1043
14
1043fa
Frequency-Controlled Gain Amplifier
LTC1043 • A21
5V
–5V
–5V
2
3
4
6
7
–
+
LT1056
3
10k
33k
22MSENSOR
* = 1% FILM RESISTOR
LT1004
1.2V
500
90%
RH TRIM
10k
5% RH TRIM
2
1
100pF
9k*
1k*
SENSOR = PANAMETRICS # RHS
≈ 500pF AT RH = 76%
1.7 pF/%RH
6
8
–
+
LM301A
OUTPUT
0V TO 1V = 0% TO 100%
1µF
100pF
0.01µF
1µF
1/4 LTC1043
12
1/4 LTC1043
11
8 7
16
17
1413
1k*
470k
Relative Humidity Sensor Signal Conditioner
GAIN CONTROL
0kHz TO 10kHz = GAIN 0 TO 1000
0.01µF
1/2 LTC1043A
FOR DIFFERENTIAL INPUT, GROUND PIN 8A AND USE PINS 13A AND 7A FOR INPUTS
FOR SINGLE-ENDED INPUT AND POSITIVE GAIN, GROUND PIN 8A AND USE PIN 7A FOR INPUT
USE ± 5V SUPPLIES FOR LTC1043
5V
2
7
6
4
3
–5V
LTC1043 • A20
100pF
1/2 LTC1043B
f
IN
• 0.01µF
1kHz • 100pF
–
+
LT1056
V
IN
V
OUT
11A 11B
12B
12A
0.01µF
13A 14A
8A
7A
16A
13B
8B
7B
16B
14B
GAIN = ; GAIN IS NEGATIVE AS SHOWN
TYPICAL APPLICATIO S
U
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