Overview
The AD7863ARS-2REEL, produced by Analog Devices Inc., is a simultaneous sampling dual 14-bit analog-to-digital converter (ADC). This component is designed to handle two complete ADC functions, allowing for the simultaneous sampling and conversion of two channels. Each ADC features a two-channel input multiplexer, enabling the conversion result for both channels to be available just 5.2 μs after initiating the conversion process.
The AD7863 operates from a single 5 V supply and consumes a typical power of 70 mW. It includes an automatic power-down mode, making it suitable for battery-powered or portable applications. The device is fabricated using Analog Devices' linear compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low power CMOS logic.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | 175 kSPS |
| Analog Input Ranges | ±10 V (AD7863-10), ±2.5 V (AD7863-3), 0 V to 2.5 V (AD7863-2) |
| Overvoltage Protection | ±17 V (AD7863-10), ±7 V (AD7863-3), +7 V (AD7863-2) |
| Supply Voltage | 5 V |
| Power Consumption | 70 mW typical |
| Operating Temperature | –40°C to +85°C |
| Package Type | 28-Lead SSOP, 28-Lead SOIC_W |
Key Features
- Simultaneous sampling and conversion of two channels, preserving relative phase information.
- Automatic power-down mode for reduced power consumption in battery-powered or portable applications.
- High speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- Tight aperture delay matching between the two input sample and hold amplifiers.
- Internal clock oscillator circuit for generating the conversion clock.
- Overvoltage protection on analog inputs to prevent damage.
Applications
The AD7863 is suitable for a variety of applications, including:
- Battery-powered and portable devices due to its low power consumption and automatic power-down mode.
- Signal processing systems where simultaneous sampling of multiple channels is required.
- Industrial and medical devices that need high precision and reliability.
- Data acquisition systems where high-speed conversion and accurate phase information are crucial.
Q & A
- What is the resolution of the AD7863 ADC?
The AD7863 has a resolution of 14 bits.
- What are the available analog input ranges for the AD7863?
The AD7863 offers three analog input ranges: ±10 V (AD7863-10), ±2.5 V (AD7863-3), and 0 V to 2.5 V (AD7863-2).
- How does the AD7863 manage power consumption?
The AD7863 features an automatic power-down mode where the part goes into sleep after the end of conversion, reducing power consumption.
- What is the sampling rate of the AD7863?
The AD7863 has a sampling rate of 175 kSPS.
- What type of interface does the AD7863 provide for connection to other devices?
The AD7863 offers a high speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- What is the operating temperature range of the AD7863?
The AD7863 operates within a temperature range of –40°C to +85°C.
- What kind of overvoltage protection does the AD7863 offer?
The AD7863 provides overvoltage protection on the analog inputs, allowing the input voltage to go to ±17 V (AD7863-10), ±7 V (AD7863-3), or +7 V (AD7863-2) without causing damage.
- What is the typical power consumption of the AD7863?
The AD7863 consumes a typical power of 70 mW.
- In what package types is the AD7863 available?
The AD7863 is available in 28-Lead SSOP and 28-Lead SOIC_W packages.
- How is the conversion clock generated in the AD7863?
The conversion clock for the AD7863 is generated internally using a laser-trimmed clock oscillator circuit.
