Overview
The AD7245AAR, produced by Analog Devices Inc., is a complete, 12-bit, voltage output digital-to-analog converter (DAC) integrated on a monolithic CMOS chip. This device features an on-chip output amplifier and a Zener voltage reference, eliminating the need for external user trims to achieve full specified performance. It is designed for high-speed applications and is microprocessor compatible, with double-buffered interface logic and high-speed data latches. The AD7245AAR supports both single and dual supply operations, offering output ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Settling Time | 7 µs |
| Output Type | Voltage - Buffered |
| Differential Output | No |
| Data Interface | Parallel |
| Reference Type | Internal |
| Voltage - Supply, Analog | ±10.8 V ~ 16.5 V |
| Voltage - Supply, Digital | 10.8 V ~ 16.5 V |
| INL/DNL (LSB) | ±1 (Max) |
| Architecture | R-2R |
| Operating Temperature | -40°C ~ 85°C |
| Package | 24-SOIC (0.295", 7.50mm Width) |
Key Features
- High-speed data latches and double-buffered interface logic for efficient data transfer.
- On-chip Zener voltage reference and output amplifier for stable and accurate voltage output.
- No external user trims required for full specified performance.
- Support for single and dual supply operations with multiple output voltage ranges (0 V to +5 V, 0 V to +10 V, and ±5 V).
- Extended temperature range operation for commercial and industrial grades.
- Low digital feedthrough of 10 nV-s in a 5 V output range.
- Internal input protection with on-chip distributed diodes.
- CLR signal for power-on reset and other features.
Applications
The AD7245AAR is suitable for a variety of applications requiring high precision and speed in digital-to-analog conversion. These include:
- Industrial control systems.
- Aerospace and defense systems.
- Medical equipment.
- Automotive systems.
- Test and measurement instruments.
Q & A
- What is the resolution of the AD7245AAR DAC?
The AD7245AAR has a 12-bit resolution. - What is the settling time of the AD7245AAR?
The settling time is 7 µs. - What type of data interface does the AD7245AAR use?
The AD7245AAR uses a parallel data interface. - Does the AD7245AAR require external user trims?
No, the AD7245AAR does not require external user trims to achieve full specified performance. - What are the available output voltage ranges for the AD7245AAR?
The available output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V. - What is the operating temperature range of the AD7245AAR?
The operating temperature range is -40°C to 85°C. - What package types are available for the AD7245AAR?
The AD7245AAR is available in a 24-SOIC package. - Is the AD7245AAR microprocessor compatible?
Yes, the AD7245AAR is microprocessor compatible. - What is the architecture of the DAC in the AD7245AAR?
The DAC architecture is R-2R. - Does the AD7245AAR have internal input protection?
Yes, the AD7245AAR has internal input protection with on-chip distributed diodes.
