AD7817
PRODUCTIONTemperature Sensor (On Chip) 4-Channel, 9 µs, 10-Bit ADC
- Part Models
- 10
- 1ku List Price
- Starting From $6.54
Part Details
- 10-Bit ADC with 9 µs Conversion Time
- 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
- 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 - See data sheet for additional features
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-and-hold 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).
PRODUCT HIGHLIGHTS
- The devices have an on-chip temperature sensor that allows an accurate measurement of the ambient temperature to be made. The measurable temperature range is −55°C to +125°C.
- An overtemperature indicator is implemented by carrying out a digital comparison of the ADC code for Channel 0 (temperature sensor) with the contents of the on-chip overtemperature register. The overtemperature indicator pin goes logic low when a predetermined temperature is exceeded.
- The automatic power-down feature enables the AD7817 and AD7818 to achieve superior power performance at slower throughput rates, that is, 40 μW at 1 kSPS throughput rate.
APPLICATIONS
- Data acquisition systems with ambient temperature monitoring
- Industrial process control
- Automotive
- Battery charging applications
Documentation
Data Sheet 1
Application Note 1
Technical Articles 1
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7817ARUZ | 16-Lead TSSOP | ||
| AD7817ARUZ-REEL7 | 16-Lead TSSOP | ||
| AD7817ARZ | 16-Lead SOIC | ||
| AD7817ARZ-REEL7 | 16-Lead SOIC | ||
| AD7817BRUZ | 16-Lead TSSOP | ||
| AD7817BRUZ-REEL | 16-Lead TSSOP | ||
| AD7817BRUZ-REEL7 | 16-Lead TSSOP | ||
| AD7817BRZ | 16-Lead SOIC | ||
| AD7817BRZ-REEL | 16-Lead SOIC | ||
| AD7817BRZ-REEL7 | 16-Lead SOIC |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
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Feb 11, 2011 - 10_0005 Halogen Free Material Change for TSSOP Products Assembled at Amkor |
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| AD7817ARUZ | PRODUCTION | |
| AD7817ARUZ-REEL7 | PRODUCTION | |
| AD7817BRUZ | PRODUCTION | |
| AD7817BRUZ-REEL | PRODUCTION | |
| AD7817BRUZ-REEL7 | PRODUCTION | |
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Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
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| AD7817ARUZ | PRODUCTION | |
| AD7817ARUZ-REEL7 | PRODUCTION | |
| AD7817ARZ | PRODUCTION | |
| AD7817ARZ-REEL7 | PRODUCTION | |
| AD7817BRUZ | PRODUCTION | |
| AD7817BRUZ-REEL7 | PRODUCTION | |
| AD7817BRZ | PRODUCTION | |
| AD7817BRZ-REEL | PRODUCTION | |
| AD7817BRZ-REEL7 | PRODUCTION | |
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Feb 6, 2014 - 13_0234 Qualification of ASE Chungli, as an Alternate Assembly Site for Select 16L SOICN Packages |
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| AD7817ARZ | PRODUCTION | |
| AD7817ARZ-REEL7 | PRODUCTION | |
| AD7817BRZ | PRODUCTION | |
| AD7817BRZ-REEL | PRODUCTION | |
| AD7817BRZ-REEL7 | PRODUCTION | |
|
Oct 5, 2010 - 10_0146 Halogen Free Material Change for 14/16L SOIC_N Products |
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| AD7817ARZ | PRODUCTION | |
| AD7817ARZ-REEL7 | PRODUCTION | |
| AD7817BRZ | PRODUCTION | |
| AD7817BRZ-REEL | PRODUCTION | |
| AD7817BRZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
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