Hot-selling and scarce AD7818ARMZ Analog Front End with DSP Microcomputer MSOP-8 spot stock

Product Descriptions

The AD7817/AD7818 are 10-bit, single-and 4-channel analog-todigital converters (ADCs)with an on-chip temperature sensor thatcan operate from a single 2.7 V to 5.5 V power supply.Each partcontains a 9 µs successive approximation converter based arounda capacitor digital-to-analog converter (DAC), an on-chiptemperature sensor with an accuracy of ±2°C, an on-chip clockoscillator, inherent track -and -hold functionality, and an on-chipreference (2.5 V).

The on-chip temperature sensor of the AD7817/AD7818 canbe accessed via Channel 0. When Channel 0 is selected and aconversion is initiated, the resulting ADC code at the end of theconversion gives a measurement of the ambient temperature with aresolution of ±0.25°C . See the Temperature Measurement section.

The AD7817/AD7818 have a flexible serial interface that allowseasy interfacing to most microcontrollers . The interface iscompatible with the Intel 8051, Motorola SPI and QSPI, andNational Semiconductors MICROWIRE protocols . For more information, refer to the AD7817 Serial Interface section andthe AD7818 Serial Interface Mode section 

Product Features

10-bit ADC with 9 µs conversion time

1 AD7818 and 4 AD7817 single-ended analog input channels

On-chip temperature sensor

Resolution of 0.25°C

±2°C error from −40°C to +85°C

−55°C to +125°C operating range

Wide operating supply range: 2.7 V to 5.5 V

Inherent track-and-hold functionality

On-chip reference (2.5 V ± 1%)

Overtemperature indicator

Automatic power-down at the end of a conversion

Low power operation

4 µW at a throughput rate of 10 SPS

40 µW at a throughput rate of 1 kSPS

400 µW at a throughput rate of 10 kSPS

Flexible serial interface

Product Applications

Data acquisition systems with ambient temperature

monitoring

Industrial process control

Automotive

Battery charging applications

Product Specification

Product Photos

For more product information, please download the PDF