Overview
The AD7891AP-2REEL, produced by Analog Devices Inc., is a comprehensive 8-channel, 12-bit data acquisition system. This component integrates an input multiplexer, an on-chip track/hold amplifier, a high-speed 12-bit Analog-to-Digital Converter (ADC), a 2.5 V reference, and a high-speed interface. It operates from a single 5 V supply and supports various analog input ranges, making it versatile for different applications. The AD7891AP-2REEL model specifically offers input ranges of 0 V to +2.5 V, 0 V to +5 V, and ±2.5 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 8 | - |
| Resolution | 12-bit | - |
| Conversion Time | 1.6 ms | ms |
| Acquisition Time | 0.4 ms | ms |
| Sample Rate (Single Channel) | 500 kSPS | kSPS |
| Sample Rate (Channel Hopping) | 62.5 kSPS | kSPS |
| Input Ranges | 0 V to +2.5 V, 0 V to +5 V, ±2.5 V | V |
| Supply Voltage | 5 V ± 5% | V |
| Power Dissipation (Normal Mode) | 82 mW (typ) | mW |
| Power Dissipation (Standby Mode) | 75 μW (typ) | μW |
| Operating Temperature Range | -40 to 85 °C | °C |
| Package Type | 44-Lead MQFP or 44-Lead PLCC | - |
Key Features
- Fast 12-bit ADC with 1.6 ms conversion time and 0.4 ms acquisition time.
- 8 single-ended analog input channels with overvoltage protection on each channel.
- Selection of input ranges: 0 V to +2.5 V, 0 V to +5 V, and ±2.5 V for the AD7891-2 model.
- Parallel and serial interface options determined by the MODE pin.
- On-chip track/hold amplifier and 2.5 V reference.
- Single-supply, low power operation with a power-down mode.
- High-speed interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
Applications
- Data Acquisition Systems
- Motor Control
- Mobile Communication Base Stations
- Instrumentation
Q & A
- What is the resolution of the AD7891AP-2REEL?
The AD7891AP-2REEL has a 12-bit resolution.
- How many analog input channels does the AD7891AP-2REEL have?
The AD7891AP-2REEL has 8 single-ended analog input channels.
- What are the input ranges for the AD7891AP-2REEL model?
The input ranges for the AD7891AP-2REEL model are 0 V to +2.5 V, 0 V to +5 V, and ±2.5 V.
- What is the conversion time of the AD7891AP-2REEL?
The conversion time of the AD7891AP-2REEL is 1.6 ms.
- What is the acquisition time of the AD7891AP-2REEL?
The acquisition time of the AD7891AP-2REEL is 0.4 ms.
- What are the interface options for the AD7891AP-2REEL?
The AD7891AP-2REEL offers both parallel and serial interface options, determined by the MODE pin.
- What is the supply voltage for the AD7891AP-2REEL?
The supply voltage for the AD7891AP-2REEL is 5 V ± 5%.
- What is the typical power dissipation in normal mode for the AD7891AP-2REEL?
The typical power dissipation in normal mode for the AD7891AP-2REEL is 82 mW.
- What is the typical power dissipation in standby mode for the AD7891AP-2REEL?
The typical power dissipation in standby mode for the AD7891AP-2REEL is 75 μW.
- What are the common applications of the AD7891AP-2REEL?
The AD7891AP-2REEL is commonly used in data acquisition systems, motor control, mobile communication base stations, and instrumentation.
