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參數(shù)資料
| 型號： | AD7609BSTZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS W/ADC 18BIT 8CH 64LQFP |
| 標準包裝： | 1,500 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS），ADC |
| 分辨率（位）： | 18 b |
| 采樣率（每秒）： | 200k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，并聯(lián)，QSPI?，串行，SPI? |
| 電壓電源： | 模擬和數(shù)字 |
| 電源電壓： | 2.3 V ~ 5 V，4.75 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-LQFP |
| 供應(yīng)商設(shè)備封裝： | 64-LQFP（10x10） |
| 包裝： | 帶卷 (TR) |
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AD7609
Data Sheet
Rev. A | Page 20 of 36
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 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.
Common-Mode Rejection Ratio (CMRR)
CMRR is defined as the ratio of the power in the ADC
common-mode input at full-scale frequency, f, to the power in
the output of a full-scale p-p sine wave applied to the common-
mode voltage of VINX+ and VINX of frequency, fS,
CMRR (dB) = 20 log (Pf/PfS)
where:
Pf is equal to the power at Frequency f in the ADC input.
PfS is equal to the power at Frequency fS in the ADC output.
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