ADS7864屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由美國(guó)德州儀器公司制造生產(chǎn)的ADS7864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(lái)說(shuō)，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(lèi)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。

FEATURES

6 Simultaneous Sampling Channels

Fully Differential Inputs

2μs Total Throughput per Channel

No Missing Codes

Parallel Interface

1MHz Effective Sampling Rate

Low Power: 50mW

6X FIFO

APPLICATIONS

Motor Control

Multi-Axis Positioning Systems

3-Phase Power Control

DESCRIPTION

The ADS7864 is a dual 12-bit, 500kHz

analog-to-digital (A/D) converter with 6 fully differen·

tial input channels grouped into three pairs for high

speed simultaneous signal acquisition. Inputs to the

sample-and-hold amplifiers are fully differential and

are maintained differential to the input of the A/D

converter. This provides excellent common-mode rejection

of 80dB at 50kHz which is important in high

noise environments.

The ADS7864 offers a parallel interface and control

inputs to minimize software overhead. The output

data for each channel is available as a 16-bit word

(address and data). The ADS7864 is offered in a

TQFP-48 package and is fully specified over the

–40°C to +85°C operating range.