tc911a Microchip Technology Inc., tc911a Datasheet - Page 6

• Manufacturer Part Number: tc911a
• Description: Monolithic Auto-zeroed Operational Amplifiers
• Manufacturer: Microchip Technology Inc.

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