TC1043 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC1043

Linear Building Block – Low Power Voltage Reference with Dual Op Amp, Dual Comparator, and Shutdown Mode

Microchip Technology 

TC1043

FIGURE 4-8:

VC

PULSE WIDTH MODULATOR

VDD

R1

R6

100k

10k

TC1043

R4

VDD

–

C1

+

R2

100k

R3

100k

Comparator

VH =

VDD (R1R2R6 + R2R3R6) + VC (R1R2R3)

R1R2R6 + R1R3R6 + R2R3R6 + R1R2R3

VL =

VDD (R2R3R6) + VC (R1R2R3)

R1R2R6 + R1R3R6 + R2R3R6 + R1R2R3

1

FREQ =

2 (0.694) (R4) (C1)

For Square Wave Generation,

Select R1 = R2 = R3

VC

=

VDD

2

FIGURE 4-9:

MULTI-POLE BUTTERWORTH VOICE BAND RECEIVE FILTER

Gain = 0 dB

Fch = 3.5kHz

-24 dB/Octave

Fcl = 70Hz

+6 dB/Octave

Passband Ripple

< 0.15 dB

TC1043

VDD /2

0.1 µF

22.6k

VDD

+

–

22.6k

6800 pF

750 pF

VOUT

VIN

21.0k

2400 pF

21.0k

21.0k

470 pF

VDD

+

–

Two (2) TC1043 Op Amps

© 2002 Microchip Technology Inc.

DS21347B-page 11

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