Overview
The AD7818ARM-REEL, produced by Analog Devices Inc., is a 10-bit, 4-channel analog-to-digital converter (ADC) with an integrated temperature sensor. This device operates from a single 2.7 V to 5.5 V power supply, making it versatile for various applications. The AD7818 features a 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 voltage of 2.5 V and supports SPI-compatible serial interfaces, making it compatible with multiple microcontroller protocols.
Key Specifications
| Parameter | Description |
|---|---|
| Resolution | 10-bit |
| Number of Channels | 4 channels (including temperature sensor) |
| Power Supply | 2.7 V to 5.5 V |
| Conversion Time | 9 μs (analog channels), 27 μs (temperature sensor) |
| Temperature Sensor Accuracy | ±2°C |
| Temperature Measurement Range | –55°C to +125°C |
| Interface | SPI-compatible serial interface |
| Package Type | 8-lead MSOP (Micro Small Outline Package) |
| Operating Temperature Range | –40°C to +85°C |
Key Features
- On-chip temperature sensor with ±2°C accuracy
- On-chip clock oscillator and reference voltage (2.5 V)
- Inherent track-and-hold functionality
- SPI-compatible serial interface for easy microcontroller integration
- Automatic power-down feature for superior power performance at slower throughput rates
- Overtemperature indicator for monitoring temperature thresholds
- Compact 8-lead MSOP package
Applications
- Industrial control systems
- Medical devices
- Automotive systems
- Consumer electronics (e.g., personal computers, office equipment, domestic appliances)
- Electronic test equipment
- Process control systems
Q & A
- What is the resolution of the AD7818ARM-REEL ADC?
The AD7818ARM-REEL has a 10-bit resolution.
- How many analog input channels does the AD7818ARM-REEL have?
The AD7818ARM-REEL has four analog input channels, including one channel dedicated to the temperature sensor.
- What is the operating voltage range of the AD7818ARM-REEL?
The AD7818ARM-REEL operates from a single 2.7 V to 5.5 V power supply.
- What is the conversion time for the analog channels and the temperature sensor?
The conversion time is 9 μs for the analog channels and 27 μs for the temperature sensor.
- What is the accuracy of the on-chip temperature sensor?
The on-chip temperature sensor has an accuracy of ±2°C.
- What is the temperature measurement range of the AD7818ARM-REEL?
The temperature measurement range is –55°C to +125°C.
- What type of interface does the AD7818ARM-REEL use?
The AD7818ARM-REEL uses an SPI-compatible serial interface.
- In what package type is the AD7818ARM-REEL available?
The AD7818ARM-REEL is available in an 8-lead MSOP (Micro Small Outline Package).
- What is the operating temperature range of the AD7818ARM-REEL?
The operating temperature range is –40°C to +85°C.
- Does the AD7818ARM-REEL have an overtemperature indicator?
