參數(shù)資料
型號(hào): TC7109ACLWR
元件分類(lèi): ADC
英文描述: 1-CH 12-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC44
封裝: PLASTIC, LCC-44
文件頁(yè)數(shù): 14/28頁(yè)
文件大?。?/td> 598K
代理商: TC7109ACLWR
2002 Microchip Technology Inc.
DS21456B-page 21
TC7109/A
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 fea-
ture can be used to advantage in reducing line
frequency noise (Figure 5-1).
FIGURE 5-1:
NORMAL MODE
REJECTION OF DUAL
SLOPE CONVERTER AS
A FUNCTION OF
FREQUENCY
30
20
10
0
0.1/t
1/t
10/t
Input Frequency
Normal
Mode
Rejection
Plan
t = Measurement
Period
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