Overview
The AD7856ARS, produced by Analog Devices Inc., is a high-speed, low-power, 14-bit analog-to-digital converter (ADC) designed for a variety of data acquisition applications. This ADC operates from a single 5 V power supply and features automatic calibration on power-up, ensuring accurate operation over time and temperature. The device is known for its flexibility in power management, including automatic power-down after conversion, which makes it suitable for low power applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 14-bit |
| Sampling Rate | 285 kSPS |
| Number of Inputs | 8 single-ended or 4 pseudo-differential |
| Input Type | Single-ended, Pseudo-differential |
| Data Interface | SPI/QSPI/8051/µP |
| Architecture | Successive Approximation (SAR) |
| Reference Type | External, Internal |
| Supply Voltage | 5 V (Analog and Digital) |
| Power Dissipation | Typically 60 mW (normal operation), 5.1 mW (power-down mode at 10 kSPS) |
| Package | 24-lead SOIC, SSOP, DIP |
| Operating Temperature | -40°C to +85°C |
Key Features
- Single 5 V supply operation
- Automatic calibration on power-up
- Flexible power management options including automatic power-down after conversion
- Operates with reference voltages from 1.2 V to VDD
- Analog input range from 0 V to VDD
- Self- and system calibration options
- Versatile serial I/O port (SPI/QSPI/8051/µP)
- Low power dissipation: typically 60 mW for normal operation and 5.1 mW in power-down mode at 10 kSPS throughput rate
Applications
The AD7856ARS is suitable for a wide range of data acquisition and measurement applications, including:
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- Automotive systems
- Test and measurement equipment
Q & A
- What is the resolution of the AD7856ARS ADC?
The AD7856ARS has a resolution of 14 bits.
- What is the sampling rate of the AD7856ARS?
The sampling rate of the AD7856ARS is 285 kSPS.
- How many input channels does the AD7856ARS have?
The AD7856ARS has 8 single-ended or 4 pseudo-differential input channels.
- What type of data interface does the AD7856ARS support?
The AD7856ARS supports SPI/QSPI/8051/µP data interfaces.
- What is the power supply voltage for the AD7856ARS?
The AD7856ARS operates from a single 5 V power supply.
- Does the AD7856ARS support automatic calibration?
Yes, the AD7856ARS supports automatic calibration on power-up and also has self- and system calibration options.
- What are the package options for the AD7856ARS?
The AD7856ARS is available in 24-lead SOIC, SSOP, and DIP packages.
- What is the operating temperature range for the AD7856ARS?
The operating temperature range for the AD7856ARS is -40°C to +85°C.
- How much power does the AD7856ARS typically consume?
The AD7856ARS typically consumes 60 mW during normal operation and 5.1 mW in power-down mode at 10 kSPS throughput rate.
- Is the AD7856ARS RoHS compliant?
Some versions of the AD7856ARS are RoHS compliant, while others are not. It depends on the specific part number and packaging.
