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參數(shù)資料
| 型號： | AD7658YSTZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/32頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 6CH 250KSPS 64LQFP |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 250k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 6 |
| 功率耗散（最大）： | 143mW |
| 電壓電源： | 模擬和數(shù)字，雙 ± |
| 工作溫度： | -40°C ~ 125°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) |
| 輸入數(shù)目和類型： | 6 個單端，雙極 |
| 配用： | EVAL-AD7658CBZ-ND - BOARD EVAL FOR AD7658 |
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Data Sheet
AD7656/AD7657/AD7658
Rev. D | Page 19 of 32
Figure 19 shows the power supply rejection ratio vs. supply
ripple frequency for the AD7656/AD7657/AD7658.
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,
100 kHz sine wave signal to all unselected input channels and
determining the degree to which the signal attenuates in the
selected channel with a 30 kHz signal.
% FSR
%FSR is calculated using the full theoretical span of the ADC.
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