Overview
The AD7847AR, produced by Analog Devices Inc., is a complete, dual, 12-bit multiplying digital-to-analog converter (DAC) with output amplifiers integrated on a monolithic CMOS chip. This device is part of the AD7837/AD7847 family and is known for its high precision and reliability. It features no external user trims required to achieve full specified performance, making it a robust choice for various applications. The AD7847AR is fabricated using Linear Compatible CMOS (LC²MOS), an advanced mixed technology process that combines precision bipolar circuits with low power CMOS logic.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 12 |
| Number of D/A Converters | 2 |
| Supply Voltage | ±14.25 V to ±15.75 V |
| Output Type | Voltage - Buffered |
| Architecture | R-2R |
| Reference Type | External |
| Data Interface | Parallel |
| Max Output Voltage | ±10 V |
| Slew Rate | 11 V/μs |
| Settling Time | 5 μs |
| Operating Temperature | -40°C to +85°C |
| Package/Case | 24-SOIC (Wide) |
| Pin Count | 24 |
| Power Dissipation | 210 mW |
| Supply Current (Max) | 10 mA |
Key Features
- High speed data latches and interface logic, making it microprocessor compatible.
- No external user trims required for full specified performance.
- Internally compensated output amplifiers with low input offset voltage due to laser trimming at wafer level.
- Low leakage configuration ensuring low offset errors over the specified temperature range.
- Parallel data loading structure with separate Chip Select inputs for each DAC.
- Edge-triggered latches for precise data transfer control.
Applications
- Data Distribution Systems
- Digital Potentiometers
- Software Radio
- Wireless Infrastructure: WCDMA, etc.
Q & A
- What is the resolution of the AD7847AR? The AD7847AR is a 12-bit digital-to-analog converter.
- How many DACs are integrated in the AD7847AR? The AD7847AR contains two independent DACs.
- What is the supply voltage range for the AD7847AR? The supply voltage range is ±14.25 V to ±15.75 V.
- What type of data interface does the AD7847AR use? The AD7847AR uses a parallel data interface.
- What is the maximum output voltage of the AD7847AR? The maximum output voltage is ±10 V.
- What is the settling time of the AD7847AR? The settling time is 5 μs.
- What is the operating temperature range of the AD7847AR? The operating temperature range is -40°C to +85°C.
- What package types are available for the AD7847AR? The AD7847AR is available in 24-SOIC (Wide) packages.
- Is the AD7847AR RoHS compliant? No, the AD7847AR is not RoHS compliant.
- What is the architecture of the AD7847AR? The AD7847AR uses an R-2R architecture.
