Overview
The AD7891APZ-1REEL, produced by Analog Devices Inc., is an 8-channel, 12-bit data acquisition system. This component integrates an input multiplexer, an on-chip track/hold amplifier, a high-speed 12-bit ADC, a 2.5 V reference, and a high-speed interface. It operates from a single 5 V supply and offers a choice of either parallel or serial interface structure, determined by the MODE pin. The AD7891APZ-1REEL is part of the AD7891-1 model, which supports input ranges of ±5 V and ±10 V. This device is designed for easy interfacing with modern microprocessors, microcontrollers, and digital signal processors, making it suitable for various data acquisition and control applications.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 8 single-ended analog input channels |
| Resolution | 12-bit |
| Input Ranges | ±5 V, ±10 V |
| Conversion Time | 1.6 μs (AD7891-2), 0.6 μs to 0.7 μs (AD7891-1 depending on convert start method) |
| Sample Rate | Up to 500 kSPS (single channel), up to 62.5 kSPS (channel hopping) |
| Interface | Parallel and serial |
| Power Supply | Single 5 V supply |
| Power Dissipation | 82 mW (normal mode), 75 μW (standby mode) |
| Package Type | 44-lead PLCC |
Key Features
- Fast 12-bit ADC with high conversion speed
- On-chip track/hold amplifier and 2.5 V reference
- Overvoltage protection on each channel (up to ±17 V for AD7891-1)
- Single-supply, low power operation with power-down mode
- Parallel and serial interface options
- High dynamic performance including harmonic distortion and signal-to-noise ratio specifications
Applications
- Data acquisition systems
- Motor control systems
- Mobile communication base stations
- Instrumentation and measurement systems
Q & A
- What is the resolution of the AD7891APZ-1REEL?
The AD7891APZ-1REEL has a 12-bit resolution.
- What are the input ranges supported by the AD7891-1 model?
The AD7891-1 model supports input ranges of ±5 V and ±10 V.
- What is the conversion time of the AD7891APZ-1REEL?
The conversion time for the AD7891-1 is 0.6 μs to 0.7 μs depending on the convert start method.
- Does the AD7891APZ-1REEL have overvoltage protection?
Yes, each channel on the AD7891APZ-1REEL has overvoltage protection up to ±17 V for the AD7891-1 model.
- What are the power consumption characteristics of the AD7891APZ-1REEL?
The AD7891APZ-1REEL consumes 82 mW in normal mode and 75 μW in standby mode.
- What types of interfaces does the AD7891APZ-1REEL support?
The AD7891APZ-1REEL supports both parallel and serial interfaces.
- In what package types is the AD7891APZ-1REEL available?
The AD7891APZ-1REEL is available in a 44-lead PLCC package.
- What are some typical applications of the AD7891APZ-1REEL?
Typical applications include data acquisition systems, motor control systems, mobile communication base stations, and instrumentation.
- How does the AD7891APZ-1REEL ensure easy interfacing with other devices?
The AD7891APZ-1REEL ensures easy interfacing with modern microprocessors, microcontrollers, and digital signal processors through its standard control inputs and fast data access times.
- What is the significance of the MODE pin in the AD7891APZ-1REEL?
The MODE pin determines whether the AD7891APZ-1REEL operates in parallel or serial interface mode.
