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參數(shù)資料
| 型號： | AD7609BSTZ-RL |
| 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 |
| 文件頁數(shù)： | 14/35頁 |
| 文件大?。?/td> | 1737K |
| 代理商： | AD7609BSTZ-RL |
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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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