AD7291集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）規(guī)格書PDF中文資料

AD7291屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7291模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對(duì)模擬信號(hào)進(jìn)行采樣，例如由麥克風(fēng)采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號(hào)。一般來說，數(shù)字輸出是二進(jìn)制補(bǔ)碼二進(jìn)制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進(jìn)行選擇。

GENERAL DESCRIPTION

The AD7291 is a 12-bit, low power, 8-channel, successive approximation analog-to-digital converter (ADC) with an internal temperature sensor.

The device operates from a single 3.3 V power supply and features an I2C-compatible interface. The device contains a 9- channel multiplexer and a track-and-hold amplifier than can handle frequencies up to 30 MHz. The device has an on-chip 2.5 V reference that can be disabled to allow the use of an external reference.

FEATURES

12-bit SAR ADC

8 single-ended analog input channels

Analog input range: 0 V to 2.5 V

12-bit temperature-to-digital converter

Temperature sensor accuracy of ±1°C typical

Channel sequencer operation

Specified for VDD of 2.8 V to 3.6 V

Logic voltage VDRIVE = 1.65 V to 3.6 V

Internal 2.5 V reference

I2C-compatible serial interface supports standard and

fast speed modes

Out of range indicator/alert function

Autocycle mode

Power-down current: 12 μA maximum

Temperature range: ?40°C to +125°C

20-lead LFCSP package