Overview
The AD7817ARUZ-REEL, produced by Analog Devices Inc., is a 10-bit, 4-channel analog-to-digital converter (ADC) with an integrated on-chip temperature sensor. This device operates from a single 2.7 V to 5.5 V power supply, making it versatile for various applications. The AD7817 features a 9 μs successive approximation converter based on a capacitor digital-to-analog converter (DAC), an on-chip clock oscillator, and inherent track-and-hold functionality. Additionally, it includes an on-chip reference of 2.5 V and supports a flexible serial interface compatible with several microcontroller protocols such as Intel 8051, Motorola SPI, and National Semiconductors MICROWIRE.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 10-bit | |
| Number of Channels | 4 | |
| Conversion Time | 9 μs | |
| Power Supply Range | 2.7 V to 5.5 V | |
| On-chip Temperature Sensor Accuracy | ±2°C | |
| On-chip Reference Voltage | 2.5 V | |
| Input Voltage Range | 0 V to VREF | |
| Package Types | 16-lead SOIC, 16-lead TSSOP | |
| Power Dissipation | 450 mW | |
| Thermal Impedance (θJA) | 100°C/W (SOIC), 157°C/W (TSSOP) |
Key Features
- On-chip temperature sensor with ±2°C accuracy and a resolution of ±0.25°C per LSB.
- 9 μs successive approximation converter based on a capacitor DAC.
- On-chip clock oscillator and inherent track-and-hold functionality.
- On-chip 2.5 V reference voltage.
- Flexible serial interface compatible with Intel 8051, Motorola SPI, and National Semiconductors MICROWIRE protocols.
- Automatic power-down feature for superior power performance at slower throughput rates (40 μW at 1 kSPS).
- Single-ended analog input channels with respect to AGND.
Applications
- Industrial control and monitoring systems.
- Medical devices requiring precise temperature measurement.
- Aerospace and defense applications where reliable ADCs are crucial.
- Automotive systems for temperature and analog signal monitoring.
- Consumer electronics needing integrated temperature sensing and ADC capabilities.
Q & A
- What is the resolution of the AD7817 ADC?
The AD7817 has a 10-bit resolution.
- How many analog input channels does the AD7817 have?
The AD7817 has four analog input channels.
- What is the conversion time of the AD7817?
The conversion time is 9 μs.
- What is the power supply range for the AD7817?
The power supply range is from 2.7 V to 5.5 V.
- How accurate is the on-chip temperature sensor of the AD7817?
The on-chip temperature sensor has an accuracy of ±2°C.
- What is the on-chip reference voltage of the AD7817?
The on-chip reference voltage is 2.5 V.
- What are the package types available for the AD7817?
The AD7817 is available in 16-lead SOIC and 16-lead TSSOP packages.
- What is the power dissipation of the AD7817?
The power dissipation is 450 mW.
- What is the thermal impedance (θJA) of the AD7817 in SOIC and TSSOP packages?
The thermal impedance is 100°C/W for SOIC and 157°C/W for TSSOP packages.
- Is the AD7817 compatible with various microcontroller protocols?
Yes, it is compatible with Intel 8051, Motorola SPI, and National Semiconductors MICROWIRE protocols.
