ADS7844数据手册集成电路（IC）的模数转换器（ADC）规格书PDF

描述 Description

The ADS7844 is an 8-channel, 12-bit sampling analog-to-digital 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 which reduces power dissipation to under 1µW. The ADS7844 is guaranteed down to 2.7V operation.
Low power, high speed, and on-board 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 is guaranteed over the –40°C to +85°C temperature range.

特性 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