TC7129(2002) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC7129
(Rev.:2002)

4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers

Microchip Technology 

TC7129

FIGURE 4-9:

ACCURACY ERRORS IN DUAL SLOPE CONVERSION

Integrate

De-integrate

Time

Over shoot due to zero crossing between

clock pulses

Integrator Residue Voltage

Clock Pulses

Over shoot caused by comparator

delay of 1 clock pulse

FIGURE 4-10:

Zero Integrate

and Latch

INTEGRATION WAVEFORM

INT1

Integrate

DE1

De-integrate REST X10 DE2 REST X10 DE3

Zero Integrate

TC7129

Integrator

Note: Shaded area greatly expanded in time and amplitude.

Residual Voltage

DS21459B-page 12

© 2002 Microchip Technology Inc.

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