AD7817BRUZ-REEL7
数据手册.pdf双通道,低功耗CMOS , DSP与单片机模拟前端 Dual, Low Power CMOS, Analog Front End with DSP Microcomputer
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
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- 10-Bit ADC with 9 µs Conversion Time
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- One AD7818 and Four AD7817 Single-Ended Analog Input Channels
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- The AD7816 Is a Temperature Measurement Only Device
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- On-Chip Temperature Sensor
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- Resolution of 0.25°C
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- ±2°C Error from -40°C to +85°C
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- -55°C to +125°C Operating Range
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- Wide Operating Supply Range 2.7 V to 5.5 V
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- Inherent Track-and-Hold Functionality
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- On-Chip Reference 2.5 V ± 1%
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- Over-Temperature Indicator
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- Automatic Power-Down at the End of a Conversion
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- Low Power Operation
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- 4 µW at a Throughput Rate of 10 SPS
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- 40 µW at a Throughput Rate of 1 kSPS
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- 400 µW at a Throughput Rate of 10 kSPS
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- Flexible Serial Interface