Overview
The AD7856AR, manufactured by Analog Devices Inc., is a high-speed, low-power, 14-bit analog-to-digital converter (ADC) designed for a wide range of data acquisition applications. It operates from a single 5 V power supply and features automatic calibration on power-up, ensuring accurate operation over time and temperature. The ADC supports both self-calibration and system calibration, and it includes flexible power management options such as automatic power-down after conversion. This component is particularly useful in applications requiring high throughput rates and low power consumption.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 14 |
| Sampling Rate (Per Second) | 285 kSPS |
| Number of Inputs | 8 single-ended or 4 pseudo-differential |
| Input Type | Pseudo-Differential, Single Ended |
| Data Interface | SPI/QSPI/8051/µP |
| Architecture | Successive Approximation (SAR) |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 5 V |
| Voltage - Supply, Digital | 5 V |
| Package | 24-SOIC (0.295", 7.50mm Width) |
| Power Consumption | Typically 60 mW (normal operation), 5.1 mW (power-down mode at 10 kSPS) |
Key Features
- Single 5 V supply operation
- Automatic calibration on power-up
- Self- and system calibration options
- Flexible power management including automatic power-down after conversion
- Eight single-ended or four pseudo-differential input channels
- Low power consumption: typically 60 mW for normal operation and 5.1 mW in power-down mode
- Versatile serial interface: SPI/QSPI/8051/µP
- Input track-and-hold acquires a signal in 500 ns with pseudo-differential sampling scheme
Applications
The AD7856AR is suitable for various data acquisition and measurement applications, including industrial control systems, medical devices, and automotive systems. Its high throughput rate and low power consumption make it ideal for applications requiring fast and accurate analog-to-digital conversion. Additionally, it can be used in test and measurement equipment, process control, and any system that requires precise and efficient data acquisition.
Q & A
- What is the sampling rate of the AD7856AR?
The AD7856AR has a sampling rate of 285 kSPS. - How many input channels does the AD7856AR have?
The AD7856AR has eight single-ended or four pseudo-differential input channels. - What is the power supply requirement for the AD7856AR?
The AD7856AR operates from a single 5 V power supply. - Does the AD7856AR support calibration?
Yes, the AD7856AR supports both self-calibration and system calibration, with automatic calibration on power-up. - What is the typical power consumption of the AD7856AR?
The typical power consumption is 60 mW for normal operation and 5.1 mW in power-down mode at 10 kSPS. - What type of data interface does the AD7856AR use?
The AD7856AR uses a versatile serial interface: SPI/QSPI/8051/µP. - What is the package type of the AD7856AR?
The AD7856AR is available in a 24-SOIC package. - Is the AD7856AR suitable for low power applications?
Yes, the AD7856AR is designed for low power applications with flexible power management options. - Can the AD7856AR handle full power signals?
Yes, the AD7856AR can convert full power signals up to 10 MHz. - What is the input signal range for the AD7856AR?
The input signal range is from 0 V to VDD (supply voltage).
