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TC911ACOA Datasheet(PDF) 6 Page - Microchip Technology |
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TC911ACOA Datasheet(HTML) 6 Page - Microchip Technology |
6 / 14 page 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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