Overview
The AD7863ARSZ-2REEL is a high-speed, low-power, dual 14-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is designed for simultaneous sampling and conversion of two analog input channels, making it ideal for applications requiring precise and synchronized data acquisition.
The AD7863 operates from a single 5 V supply and features automatic power-down mode, which makes it suitable for battery-powered or portable applications. It includes two successive approximation ADCs, two track/hold amplifiers, an internal 2.5 V reference, and a high-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Resolution | 14-bit | The number of bits used to represent the analog signal. |
| Sampling Rate | 175 kSPS | The maximum rate at which the ADC can sample the analog input. |
| Supply Voltage | 5 V | The voltage required to power the ADC. |
| Power Consumption | 70 mW (typical) | The power consumed by the ADC during normal operation. |
| Analog Input Range | 0 V to 2.5 V (AD7863-2) | The range of analog voltages that the ADC can convert. |
| Overvoltage Protection | +7 V (without causing damage) | The maximum voltage that can be applied to the analog inputs without damaging the device. |
| Package Type | 28-Lead SSOP | The physical package of the component. |
| Operating Temperature Range | -40°C to +85°C | The range of temperatures within which the device can operate reliably. |
Key Features
- Simultaneous Sampling: The AD7863 allows for simultaneous sampling and conversion of two analog input channels, preserving the relative phase information of the signals.
- High-Speed Parallel Interface: The component features a high-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- Automatic Power-Down Mode: The ADC automatically goes into power-down mode after each conversion, making it ideal for battery-powered or portable applications.
- Internal Reference and Track/Hold Amplifiers: Includes an internal 2.5 V reference and two track/hold amplifiers for precise analog signal handling.
- Overvoltage Protection: The analog inputs have overvoltage protection to prevent damage from excessive input voltages.
Applications
- Data Acquisition Systems: Suitable for systems requiring simultaneous sampling of multiple analog channels.
- Portable and Battery-Powered Devices: Ideal due to its low power consumption and automatic power-down mode.
- Industrial Control Systems: Can be used in industrial environments where precise and synchronized data acquisition is necessary.
- Medical Devices: Applicable in medical equipment that requires high accuracy and simultaneous sampling of analog signals.
Q & A
- What is the resolution of the AD7863 ADC?
The AD7863 has a resolution of 14 bits.
- What is the maximum sampling rate of the AD7863?
The maximum sampling rate is 175 kSPS.
- What is the supply voltage for the AD7863?
The supply voltage is 5 V.
- Does the AD7863 have overvoltage protection?
- What type of package is the AD7863 available in?
The AD7863 is available in a 28-Lead SSOP package.
- What is the operating temperature range of the AD7863?
The operating temperature range is -40°C to +85°C.
- How does the AD7863 handle power consumption?
The AD7863 has an automatic power-down mode that reduces power consumption after each conversion.
- Can the AD7863 be used in battery-powered devices?
- What is the purpose of the internal reference in the AD7863?
The internal 2.5 V reference is used to provide a stable voltage for the ADC conversion process.
- How are the conversion results accessed from the AD7863?
The conversion results are accessed via a 14-bit parallel data bus using standard CS and RD signals.
