ADS7844E/2K5集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS7844E/2K5属于集成电路（IC）的模数转换器（ADC）。由德州仪器制造生产的ADS7844E/2K5模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。

FEATURES

SINGLE SUPPLY: 2.7V to 5V

8-CHANNEL SINGLE-ENDED OR

4-CHANNEL DIFFERENTIAL INPUT

UP TO 200kHz CONVERSION RATE

±1 LSB MAX INL AND DNL

NO MISSING CODES

72dB SINAD

SERIAL INTERFACE

20-LEAD QSOP AND

20-LEAD SSOP PACKAGES

ALTERNATE SOURCE FOR MAX147

APPLICATIONS

DATA ACQUISITION

TEST AND MEASUREMENT

INDUSTRIAL PROCESS CONTROL

PERSONAL DIGITAL ASSISTANTS

BATTERY-POWERED SYSTEMS

DESCRIPTION

The ADS7844 is an 8-channel, 12-bit sampling analog-todigital

converter (ADC) with a synchronous serial interface.

Typical power dissipation is 3mW at a 200kHz throughput

rate and a +5V supply. The reference voltage (VREF) can be

varied between 100mV and VCC, providing a corresponding

input voltage range of 0V to VREF. The device includes a

shutdown mode that reduces power dissipation to under

1μW. The ADS7844 is ensured down to 2.7V operation.

Low power, high speed, and onboard multiplexer make the

ADS7844 ideal for battery-operated systems such as personal

digital assistants, portable multichannel data loggers, and

measurement equipment. The serial interface also provides

low-cost isolation for remote data acquisition. The ADS7844

is available in a 20-lead QSOP package and the MAX147

equivalent 20-lead SSOP package and is ensured over the

–40°C to +85°C temperature range.