Overview
The AD7817ARU-REEL, produced by Analog Devices Inc., is a 10-bit, 4-channel analog-to-digital converter (ADC) that integrates several advanced features. This device operates from a single 2.7 V to 5.5 V power supply and includes an on-chip temperature sensor, an on-chip clock oscillator, and inherent track-and-hold functionality. The AD7817 is designed for low power consumption and high accuracy, making it suitable for a variety of applications requiring precise analog-to-digital conversion and temperature monitoring.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Resolution | 10 bits | ||
| Number of Channels | 4 | ||
| Conversion Time | 9 μs | Successive approximation converter | |
| Power Supply | 2.7 V to 5.5 V | V | |
| On-chip Temperature Sensor Accuracy | ±2°C | °C | Ambient temperature measurement |
| Temperature Measurement Range | −55°C to +125°C | °C | |
| On-chip Reference Voltage | 2.5 V | V | Nominal value |
| Input Voltage Range | 0 V to VREF | V | Single-ended with respect to AGND |
| Serial Interface Compatibility | Intel 8051, Motorola SPI and QSPI, National Semiconductors MICROWIRE | ||
| Package Options | 16-lead SOIC, 16-lead TSSOP |
Key Features
- On-chip Temperature Sensor: Allows accurate measurement of ambient temperature with a resolution of ±0.25°C and an accuracy of ±2°C.
- On-chip Clock Oscillator: Provides a built-in clock source, eliminating the need for an external clock.
- Inherent Track-and-Hold Functionality: Ensures accurate conversion of analog signals.
- On-chip Reference (2.5 V): Can be used internally or externally, with the option to shut down the internal reference if an external reference is connected.
- Flexible Serial Interface: Compatible with Intel 8051, Motorola SPI and QSPI, and National Semiconductors MICROWIRE protocols, facilitating easy interfacing with most microcontrollers.
- Low Power Consumption: Operates with a low power supply range of 2.7 V to 5.5 V, making it suitable for battery-powered devices.
Applications
- Temperature Monitoring: The on-chip temperature sensor makes it ideal for applications requiring ambient temperature measurement, such as industrial control systems and environmental monitoring.
- Data Acquisition Systems: Suitable for multi-channel data acquisition due to its four analog input channels and high conversion speed.
- Automotive Systems: Can be used in automotive applications where precise analog-to-digital conversion and temperature monitoring are critical.
- Medical Devices: Applicable in medical devices that require accurate and reliable analog-to-digital conversion and temperature sensing.
Q & A
- What is the resolution of the AD7817 ADC?
The AD7817 has a resolution of 10 bits.
- What is the operating voltage range of the AD7817?
The AD7817 operates from a single 2.7 V to 5.5 V power supply.
- Does the AD7817 have an on-chip temperature sensor?
- What is the conversion time of the AD7817?
The conversion time of the AD7817 is 9 μs.
- What serial interfaces is the AD7817 compatible with?
The AD7817 is compatible with Intel 8051, Motorola SPI and QSPI, and National Semiconductors MICROWIRE protocols.
- Can the AD7817 use an external reference voltage?
- What is the temperature measurement range of the AD7817's on-chip temperature sensor?
The temperature measurement range is −55°C to +125°C.
- How many analog input channels does the AD7817 have?
The AD7817 has four analog input channels.
- What are the package options for the AD7817?
The AD7817 is available in 16-lead SOIC and 16-lead TSSOP packages.
- Is the AD7817 suitable for low power applications?
