Overview
The AD7858AN is a high-speed, low-power, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed to operate from a single 3 V or 5 V power supply, making it versatile for various applications. The AD7858AN is optimized for speed, capable of a 200 kHz throughput rate, and features automatic calibration on power-up, system and self-calibration options, and flexible power management. It is suitable for use in battery-powered systems, instrumentation, and high-speed data acquisition systems due to its low power consumption and high accuracy.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Bits | 12 | |
| Sampling Rate | 200 kSPS | |
| Number of Inputs | 8 single-ended or 4 pseudo-differential | |
| Input Type | Single-ended, Pseudo-differential | |
| Data Interface | SPI, QSPI, 8051/µP compatible | |
| Package | 24-lead DIP, SOIC, SSOP | |
| Voltage - Supply, Analog | 3 V ~ 5.5 V | V |
| Voltage - Supply, Digital | 3 V ~ 5.5 V | V |
| Power Consumption | 12 mW (VDD = 3 V), 25 µW in power-down mode | mW, µW |
| Signal to Noise + Distortion Ratio (SNR) | 70 dB min (typically 72 dB) | dB |
Key Features
- Automatic calibration on power-up and system/self-calibration options
- 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
- Versatile serial I/O port (SPI/QSPI/8051/µP)
- Low power consumption: 12 mW (VDD = 3 V) and 25 µW in power-down mode
- CMOS construction for low power dissipation
Applications
- Battery-powered systems (personal digital assistants, medical instruments, mobile communications)
- Pen computers
- Instrumentation and control systems
- High-speed modems
Q & A
- What is the sampling rate of the AD7858AN?
The AD7858AN has a sampling rate of 200 kSPS. - How many input channels does the AD7858AN have?
The AD7858AN has 8 single-ended or 4 pseudo-differential input channels. - What are the power supply options for the AD7858AN?
The AD7858AN can operate from a single 3 V or 5 V power supply. - What is the power consumption of the AD7858AN?
The power consumption is typically 12 mW at VDD = 3 V and 25 µW in power-down mode. - Does the AD7858AN support automatic calibration?
Yes, the AD7858AN supports automatic calibration on power-up and system/self-calibration options. - What types of packages are available for the AD7858AN?
The AD7858AN is available in 24-lead DIP, SOIC, and SSOP packages. - What is the signal to noise plus distortion ratio (SNR) of the AD7858AN?
The SNR is typically 72 dB (minimum 70 dB). - What are some common applications of the AD7858AN?
Common applications include battery-powered systems, pen computers, instrumentation and control systems, and high-speed modems. - What data interface options are available for the AD7858AN?
The AD7858AN supports SPI, QSPI, and 8051/µP compatible serial interfaces. - Is the AD7858AN suitable for low-power applications?
Yes, the AD7858AN is designed for low-power applications with features like automatic power-down after conversion.
