Product Details
●The AD7818 and AD7817 are 10-bit, single- and 4-channel A/D converters with on-chip temperature sensor that can operate from a single 2.7 V to 5.5 V power supply. Each part contains a 9 μs successive-approximation converter based around a capacitor DAC, an on-chip temperature sensor with an accuracy of ±2°C, an on-chip clock oscillator, inherent track-andhold functionality and an on-chip reference (2.5 V). The AD7816 is a temperature monitoring only device in a SOIC/MSOP package.
●The on-chip temperature sensor of the AD7817 and AD7818 can be accessed via Channel 0. When Channel 0 is selected and a conversion is initiated, the resulting ADC code at the end of the conversion gives a measurement of the ambient temperature with a resolution of ±0.25°C. See Temperature Measurement section of this data sheet.
●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™ protocols and National Semiconductors MICROWIRE™ protocol. For more information refer to the Serial Interface section of this data sheet.
●The AD7817 is available in a narrow body 0.15" 16-lead small outline IC (SOIC), in a 16-lead, thin shrink small outline package (TSSOP), while the AD7816/AD7818 come in an 8-lead small outline IC (SOIC) and an 8-lead microsmall outline IC (MSOP).
●### Features and Benefits
● 10-Bit ADC with 9 µs 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 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
