Overview
The AD7890AR-10 is an 8-channel, 12-bit serial data acquisition system produced by Analog Devices Inc. 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 serial interface. It operates from a single 5 V supply and supports various analog input ranges, including ±10 V for the AD7890-10 model. The device is designed for versatility and efficiency, making it suitable for a wide range of data acquisition applications.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 8 |
| Resolution | 12 bits |
| Analog Input Range | ±10 V (AD7890-10) |
| Conversion Time | 5.9 μs max |
| Track/Hold Acquisition Time | 2 μs max |
| Supply Voltage | 5 V ± 5% |
| Normal Mode Power Dissipation | 50 mW max (typically 30 mW) |
| Standby Mode Power Dissipation | 75 μW typ |
| Output Coding | Twos Complement (AD7890-10), Straight Binary (AD7890-4, AD7890-2) |
| Serial Interface | High-speed, bidirectional serial interface |
Key Features
- Fast 12-bit ADC with 5.9 μs conversion time
- Eight single-ended analog input channels
- Selection of input ranges: ±10 V (AD7890-10), 0 V to 4.096 V (AD7890-4), 0 V to 2.5 V (AD7890-2)
- On-chip track/hold amplifier and 2.5 V reference
- High-speed, flexible serial interface
- Single supply, low-power operation
- Power-down mode for reduced power consumption
- Independently accessible multiplexer for external filtering or signal conditioning
Applications
The AD7890AR-10 is suitable for various data acquisition applications, including:
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- Automotive systems
- Test and measurement equipment
Q & A
- What is the resolution of the AD7890AR-10?
The AD7890AR-10 has a resolution of 12 bits.
- What are the available analog input ranges for the AD7890AR-10?
The available analog input ranges are ±10 V (AD7890-10), 0 V to 4.096 V (AD7890-4), and 0 V to 2.5 V (AD7890-2).
- What is the conversion time of the AD7890AR-10?
The conversion time is 5.9 μs maximum.
- Does the AD7890AR-10 support power-down mode?
- What type of serial interface does the AD7890AR-10 use?
The AD7890AR-10 uses a high-speed, bidirectional serial interface.
- Can the multiplexer be accessed independently?
- What is the supply voltage for the AD7890AR-10?
The supply voltage is 5 V ± 5%.
- What is the typical power dissipation in normal mode?
The typical power dissipation in normal mode is 30 mW.
- What is the output coding for the AD7890-10 model?
The output coding for the AD7890-10 model is twos complement.
- Is the AD7890AR-10 suitable for low-power applications?
