ADS7844NB.B中文资料德州仪器数据手册PDF规格书

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.