TC7109CLW datasheet(22/30 Pages) MICROCHIP

Part #	TC7109CLW

Description	12-Bit 關A-Compatible Analog-to-Digital Converters

PDF	30 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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22 / 30 page

TC7109/A

DS21456C-page 22

5.0

INTEGRATING CONVERTER

FEATURES

The output of integrating ADCs represents the integral,

or average, of an input voltage over a fixed period of

time. Compared with techniques in which the input is

sampled and held, the integrating converter averages

the effects of noise. A second important characteristic

is that time is used to quantize the answer, resulting in

extremely small non-linearity errors and no missing

output codes. The integrating converter also has very

good rejection of frequencies whose periods are an

integral multiple of the measurement period. This

feature can be used to advantage in reducing line

frequency noise (Figure ).

FIGURE 5-1:

Normal Mode Rejection of

Dual Slope Converter as a Function of

Frequency

0.1/t

1/t

10/t

Input Frequency

t = Measurement

Period

TC7109CLW Datasheet(PDF) 22 Page - Microchip Technology