Overview
The AD7837ANZ, produced by Analog Devices Inc., is a complete, dual 12-bit multiplying digital-to-analog converter (DAC) with integrated output amplifiers on a monolithic CMOS chip. This device is part of the AD7837/AD7847 series and is known for its high precision and reliability. It is fabricated using Linear Compatible CMOS (LC2MOS), a mixed technology process that combines precision bipolar circuits with low power CMOS logic. The AD7837ANZ does not require external user trims to achieve full specified performance, making it a robust and user-friendly component for various applications.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Number of Bits | 12 | Dual DAC | |
| Number of D/A Converters | 2 | ||
| Settling Time | 5 µs | ||
| Output Type | Voltage - Buffered | ||
| Differential Output | No | ||
| Data Interface | Parallel (Double-buffered 8-bit bus for AD7837) | ||
| Reference Type | External | ||
| Voltage - Supply, Analog | ±14.25 V ~ 15.75 V | V | |
| INL/DNL (LSB) | ±1 (Max), ±1 (Max) | LSB | |
| Architecture | R-2R | ||
| Operating Temperature | -40°C ~ 85°C | °C | |
| Package | 24-Lead PDIP |
Key Features
- High Precision: The AD7837ANZ features high precision with low offset errors due to laser trimming at the wafer level and a novel low leakage configuration.
- Dual 12-Bit DACs: It includes two 12-bit multiplying digital-to-analog converters with integrated output amplifiers, capable of developing ±10 V across a 2 kΩ load.
- Microprocessor Compatibility: The device is microprocessor compatible with high-speed data latches and interface logic, making it suitable for a wide range of applications.
- Double-Buffered Interface: The AD7837ANZ has a double-buffered 8-bit bus interface structure, allowing data to be loaded in two write operations.
- Asynchronous LDAC Signal: The asynchronous LDAC signal updates the DAC latches and analog outputs, which is useful for simultaneous updating of multiple AD7837s.
- Low Power CMOS Logic: Fabricated using Linear Compatible CMOS (LC2MOS), combining precision bipolar circuits with low power CMOS logic.
Applications
The AD7837ANZ is versatile and can be used in various applications, including:
- Industrial Control Systems: For precise control and monitoring in industrial environments.
- Medical Equipment: Where high accuracy and reliability are crucial.
- Aerospace and Defense: For applications requiring robust and precise analog output.
- Automotive Systems: For control and monitoring systems in vehicles.
- Test and Measurement Equipment: For generating precise analog signals.
Q & A
- What is the resolution of the AD7837ANZ?
The AD7837ANZ has a resolution of 12 bits.
- How many DACs are included in the AD7837ANZ?
The AD7837ANZ includes two 12-bit multiplying digital-to-analog converters.
- What is the settling time of the AD7837ANZ?
The settling time of the AD7837ANZ is 5 µs.
- What type of data interface does the AD7837ANZ use?
The AD7837ANZ uses a double-buffered 8-bit bus interface structure for parallel data loading.
- What is the operating temperature range of the AD7837ANZ?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the AD7837ANZ?
The supply voltage range is ±14.25 V to ±15.75 V.
- Does the AD7837ANZ require external user trims?
No, the AD7837ANZ does not require external user trims to achieve full specified performance.
- What is the output type of the AD7837ANZ?
The output type is voltage-buffered.
- Is the AD7837ANZ RoHS compliant?
- What is the package type of the AD7837ANZ?
