Overview
The AD7847AR-REEL, produced by Analog Devices Inc., is a dual 12-bit digital-to-analog converter (DAC) designed for high precision and versatility in various analog output applications. This component is part of the AD7847 series, which offers multiple package options and temperature ranges. The AD7847AR-REEL is specifically packaged in a 24-lead SOIC (Small Outline Integrated Circuit) and is rated for operation over the temperature range of –40°C to +85°C.
Key Specifications
| Parameter | A Version | B Version | Units | Test Conditions/Comments |
|---|---|---|---|---|
| Resolution | 12 bits | 12 bits | - | - |
| Relative Accuracy | ±1 LSB max | ±1/2 LSB max | - | - |
| Differential Nonlinearity | ±1 LSB max | ±1 LSB max | - | - |
| Zero Code Offset Error @ +25°C | ±2 mV max | ±2 mV max | - | DAC Latch Loaded with All 0s |
| Temperature Coefficient | ±5 µV/°C typ | ±5 µV/°C typ | - | - |
| Gain Error @ +25°C | ±4 mV max | ±2 mV max | - | - |
Key Features
- Dual 12-bit DACs, each with its own CS input and a common WR input, allowing for independent or synchronized operation.
- Edge-triggered latches for data transfer on the rising edge of WR.
- Internally connected feedback resistor (RFB) for DAC B.
- Support for bipolar operation with offset binary coding.
- Capability for 4-quadrant multiplication when VIN is an ac signal.
- Operating temperature range of –40°C to +85°C.
Applications
The AD7847AR-REEL is suitable for a variety of applications requiring high precision analog output, such as:
- Industrial control systems.
- Aerospace and defense systems.
- Medical devices requiring precise analog signals.
- Automotive systems, especially those needing robust temperature performance.
- Audio and video equipment where high fidelity is crucial.
Q & A
- What is the resolution of the AD7847AR-REEL?
The AD7847AR-REEL has a resolution of 12 bits.
- What is the operating temperature range of the AD7847AR-REEL?
The operating temperature range is –40°C to +85°C.
- How many DACs are included in the AD7847AR-REEL?
The AD7847AR-REEL includes two independent 12-bit DACs.
- What is the relative accuracy of the AD7847AR-REEL?
The relative accuracy is ±1 LSB max for the A version and ±1/2 LSB max for the B version.
- Can the AD7847AR-REEL operate in bipolar mode?
- How is data transferred to the DAC latches?
Data is transferred to the DAC latches on the rising edge of the WR input.
- What is the significance of the CSA and CSB inputs?
The CSA and CSB inputs control the loading of data to the DAC A and DAC B latches, respectively.
- Can the same data be latched to both DACs simultaneously?
- What is the purpose of the internally connected feedback resistor (RFB) for DAC B?
The internally connected feedback resistor (RFB) for DAC B simplifies the circuit and ensures consistent performance.
- What kind of packaging does the AD7847AR-REEL come in?
The AD7847AR-REEL is packaged in a 24-lead SOIC (Small Outline Integrated Circuit).
