參數(shù)資料
型號(hào): AD7609BSTZ
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: 8-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP64
封裝: ROHS COMPLIANT, MS-026BCD, LQFP-64
文件頁(yè)數(shù): 14/35頁(yè)
文件大?。?/td> 1737K
代理商: AD7609BSTZ
Preliminary Technical Data
AD7609
Rev. PrD | Page 21 of 35
Power Supply Rejection (PSR)
Variations in power supply affect the full-scale transition but
not the converter’s linearity. Power supply rejection is the
maximum change in full-scale transition point due to a change
in power supply voltage from the nominal value. The power
supply rejection ratio is defined as the ratio of the power in the
ADC output at full-scale Frequency f to the power of a 200 mV
p-p sine wave applied to the ADC’s VDD and VSS supplies of
Frequency fS.
PSRR (dB) = 10 log (Pf/PfS)
where:
Pf is equal to the power at Frequency f in the ADC output.
PfS is equal to the power at Frequency fS coupled onto the VDD
and VSS supplies.
Channel-to-Channel Isolation
Channel-to-channel isolation is a measure of the level of crosstalk
between any two channels. It is measured by applying a full-scale,
10 kHz sine wave signal to all unselected input channels and
determining the degree to which the signal attenuates in the
selected channel with a 1 kHz signal.
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