Overview
The AD7818ARMZ, produced by Analog Devices Inc., is a 10-bit, single- and 4-channel analog-to-digital converter (ADC) with an integrated on-chip temperature sensor. This device operates from a single power supply ranging from 2.7 V to 5.5 V, making it versatile for various applications. The AD7818 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 a 2.5 V on-chip reference and supports multiple serial interface protocols such as Intel 8051, Motorola SPI, and National Semiconductors MICROWIRE.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 10-bit | |
| Number of Channels | 4 (including temperature sensor) | |
| Conversion Time | 9 μs | |
| Power Supply Range | 2.7 V to 5.5 V | V |
| Temperature Sensor Accuracy | ±2°C | °C |
| Operating Temperature Range | -55°C to 125°C | °C |
| Package Type | 8-lead MSOP | |
| Power Consumption (Typical at 1 kSPS) | 48.8 μW | W |
| Input Voltage Range | 0 to VREF | V |
| Input Leakage Current | ±1 μA | A |
| Input Capacitance | 10 pF | F |
Key Features
- On-chip temperature sensor with ±2°C accuracy
- 9 μs successive approximation converter
- On-chip clock oscillator and track-and-hold functionality
- 2.5 V on-chip reference
- Flexible serial interface compatible with Intel 8051, Motorola SPI, and National Semiconductors MICROWIRE protocols
- Automatic power-down feature for low power consumption
- Single power supply operation from 2.7 V to 5.5 V
Applications
- Industrial control systems
- Medical devices requiring temperature monitoring
- Aerospace and defense applications
- Automotive systems
- Environmental monitoring and sensing
Q & A
- What is the resolution of the AD7818 ADC?
The AD7818 has a 10-bit resolution.
- How many channels does the AD7818 support?
The AD7818 supports 4 channels, including one for the on-chip temperature sensor.
- What is the conversion time of the AD7818?
The conversion time is 9 μs.
- What is the power supply range for the AD7818?
The AD7818 operates from a single power supply ranging from 2.7 V to 5.5 V.
- How accurate is the on-chip temperature sensor?
The on-chip temperature sensor has an accuracy of ±2°C.
- What is the typical power consumption of the AD7818 at 1 kSPS throughput rate?
The typical power consumption at 1 kSPS throughput rate is 48.8 μW.
- What serial interface protocols is the AD7818 compatible with?
The AD7818 is compatible with Intel 8051, Motorola SPI, and National Semiconductors MICROWIRE protocols.
- What is the package type of the AD7818ARMZ?
The AD7818ARMZ comes in an 8-lead MSOP package.
- What is the operating temperature range of the AD7818?
The operating temperature range is -55°C to 125°C.
- Does the AD7818 have an automatic power-down feature?
Yes, the AD7818 has an automatic power-down feature to reduce power consumption at slower throughput rates.
