AD7816

a Single- and 4-Channel, 9 ␮s, 10-Bit ADCs with On-Chip Temperature Sensor AD7816/AD7817/AD7818 FUNCTIONAL BLOCK DIAGRAM REFIN VDD FEATURES 10-Bit ADC with 9 ␮ s Conversion Time One (AD7818) and Four (AD7817) Single-Ended Analog Input Channels The AD7816 Is a Temperature Measurement Only Device 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%) Over-Temperature Indicator Automatic Power-Down at the End of a Conversion Low Power Operation 4 ␮ W at a Throughput Rate of 10 SPS 40 ␮ W at a Throughput Rate of 1 kSPS 400 ␮ W at a Throughput Rate of 10 kSPS Flexible Serial Interface APPLICATIONS Ambient Temperature Monitoring (AD7816) Thermostat and Fan Control High Speed Microprocessor Temperature Measurement and Control Data Acquisition Systems with Ambient Temperature Monitoring (AD7817 and AD7818) Industrial Process Control Automotive Battery Charging Applications GENERAL DESCRIPTION AD7817 TEMP SENSOR REF 2.5V MUX SAMPLING CAPACITOR OVER-TEMP REG CHARGE REDISTRIBUTION DAC CONTROL LOGIC B A>B A DATA OUT OTI DOUT VIN1 VIN2 VIN3 VIN4 CONTROL REG DIN SCLK RD/WR VBALANCE AGND DGND BUSY CONVST CLOCK CS The AD7816, AD7817 and AD7818 have a flexible serial interface that allows easy interfacing to most microcontrollers. The interface is compatible with the Intel 8051, Motorola SPI™ and QSPI™ protoco...