Overview
The AD7863ARSZ-10REEL7 is a high-speed, low-power, dual 14-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed for simultaneous sampling and conversion of two channels, making it ideal for applications requiring precise and synchronized data acquisition. The AD7863 operates from a single 5 V supply and features an internal 2.5 V reference, two track/hold amplifiers, and a high-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 14 |
| Number of A/D Converters | 2 |
| Sampling Rate | 175 kSPS |
| Analog Input Range | ±10 V (AD7863-10), ±2.5 V (AD7863-3), 0 V to 2.5 V (AD7863-2) |
| Overvoltage Protection | ±17 V, ±7 V, or +7 V respectively |
| Supply Voltage | 5 V |
| Power Consumption | 70 mW typical |
| Operating Temperature | -40°C to +85°C |
| Package | 28-Lead SSOP |
| Reference Type | Internal, External |
| Data Interface | Parallel |
Key Features
- Simultaneous sampling and conversion of two channels, preserving the relative phase information of the signals.
- High-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- Internal 2.5 V reference and two track/hold amplifiers.
- Automatic power-down mode, ideal for battery-powered or portable applications.
- Overvoltage protection on analog inputs to prevent damage.
- Fabricated in Analog Devices' linear compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low power CMOS logic.
Applications
- Data acquisition systems requiring synchronized sampling.
- Medical devices, such as ECG and EEG systems.
- Aerospace and defense applications where precise and simultaneous data acquisition is crucial.
- Industrial control systems, including process monitoring and automation.
- Battery-powered or portable devices where low power consumption is essential.
Q & A
- What is the sampling rate of the AD7863?
The AD7863 has a sampling rate of 175 kSPS.
- How many analog inputs does the AD7863 have?
The AD7863 has four analog inputs grouped into two channels (A and B).
- What is the power consumption of the AD7863?
The AD7863 consumes 70 mW typical.
- What is the operating temperature range of the AD7863?
The operating temperature range is -40°C to +85°C.
- Does the AD7863 have overvoltage protection?
Yes, the AD7863 has overvoltage protection allowing input voltages to go up to ±17 V, ±7 V, or +7 V without causing damage.
- What type of data interface does the AD7863 use?
The AD7863 uses a high-speed parallel data interface.
- How is the conversion initiated on the AD7863?
Conversion is initiated by pulsing the CONVST input.
- What is the significance of the BUSY signal in the AD7863?
The BUSY signal indicates the end of conversion, and at this time, the conversion results for both channels are available to be read.
- Is the AD7863 suitable for battery-powered applications?
Yes, the AD7863 is suitable for battery-powered or portable applications due to its automatic power-down mode.
- What package types are available for the AD7863?
The AD7863 is available in 28-lead SOIC_W and SSOP packages.
