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TC911B Datasheet(PDF) 6 Page - Microchip Technology

Part # TC911B
Description  Monolithic Auto-Zeroed Operational Amplifiers
PDF  14 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC911B Datasheet(HTML) 6 Page - Microchip Technology

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TC911A/TC911B
DS21481C-page 6
© 2005 Microchip Technology Inc.
4.0
TYPICAL APPLICATIONS
FIGURE 4-1:
THERMOMETER CIRCUIT
FIGURE 4-2:
10-VOLT PRECISION
REFERENCE
FIGURE 4-3:
PROGRAMMABLE GAIN AMPLIFIER WITH INPUT MULTIPLEXER
+9V
TC911
REF02
–
+
VOUT
R2
R3
R1
ADJ
Temp
Out
VREF
VOUT = VTEMP 1 + R2
[
() VREF
–
] [
R2 ]
1 + R2
[
R3 + R1
()]
d (VTEMP)
d VOUT
≈ K (2.1 mV/C)
K = 1 +
R2
dT
R3 X R1
dT
R3 + R1
R1
R3 X R1
R3 X R1
≈
+
–
TC911
18 k
6.4 k
3.6 k
6.4V
4
6
7
3
2
0.1µF
+15V
VOUT = 10V
+
–
TC911
A1 A2 A3 A4 WR
+5V
–5V
GND
+5V –5V
+5V
-5V
1
VOUT
2k
18k
Input
Channel
Select
68HC11
Gain
Select
A1 A2
A3 A4
WR
Latch
GND
10
X
100
1000
XX
X
99k
999k
1k
1k
IN1
IN2
IN3
IN4
IC1b
IC1b
IC1a, b, = Quad Analog Switch



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