AD7818 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD7818
Manufacturer

ADI
ChipWorker Part#

CW430800163
Description

Temperature Sensor (On-Chip) Single-Channel, 9µs, 10Bit ADC
Documentation

Datasheet

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AD7818 Specifications

Attribute	Attribute Value

Part Number	AD7818
Manufacturer	ADI
ChipWorker Part#	CW430800163
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

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

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