Overview
The AD7111ACRZ-REEL, produced by Analog Devices Inc., is a monolithic multiplying Digital-to-Analog Converter (DAC) known as the LOGDAC. This device features a wide dynamic range and is available in a small package, making it highly versatile for various applications. The AD7111 and its variant, AD7111A, are fabricated using Linear Compatible CMOS (LC2MOS), a mixed technology process that combines precision bipolar circuits with low power CMOS logic.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Nominal Resolution | 0.375 dB | dB | Accuracy ≤ ±0.17 dB |
| Dynamic Range | 0 dB to 88.5 dB | dB | Attenuation range in 0.375 dB steps |
| Package Types | 16-pin DIP, SOIC, LCCC | - | Variety of package options |
| Power Supply (VDD) | +5 V | V | Maximum current consumption: 1-2 mA |
| Data Setup Time | 25 ns | ns | Data valid to write setup time |
| Write Pulse Width | 57 ns | ns | Minimum write pulse width |
| Propagation Delay | 1-1.5 µs | µs | Full-scale change measured from WR going high |
Key Features
- Wide Dynamic Range: The AD7111ACRZ-REEL offers an attenuation range of 0 dB to 88.5 dB in 0.375 dB steps, providing a very fine step resolution over the entire dynamic range.
- Small Package Options: Available in 16-pin DIP, SOIC, and LCCC packages, making it suitable for a variety of applications where space is limited.
- Transparent Latch Operation: The AD7111A version allows transparent operation of the latches by tying the CS and WR inputs low.
- Fast Microprocessor Interface: Compatible with modern microprocessors due to fast data setup times (25 ns) and write pulse widths (57 ns).
- Pin and Function Compatibility: The AD7111A is pin and function-compatible with the industry-standard AD7524, facilitating easy upgrades in existing designs.
Applications
- Audio and Video Systems: The wide dynamic range and fine step resolution make it ideal for audio and video applications requiring precise control over signal levels.
- Industrial Control Systems: Suitable for industrial control systems where precise analog signal generation is necessary.
- Medical Equipment: Used in medical devices that require accurate and reliable analog signal generation.
- Telecommunications: Applicable in telecommunications equipment for signal attenuation and level control.
Q & A
- What is the dynamic range of the AD7111ACRZ-REEL?
The dynamic range is from 0 dB to 88.5 dB in 0.375 dB steps.
- What are the available package types for the AD7111ACRZ-REEL?
The device is available in 16-pin DIP, SOIC, and LCCC packages.
- How is the AD7111A different from the AD7111?
The AD7111A has a level-triggered WR input, allowing for transparent operation of the latches, whereas the AD7111 has an edge-triggered WR input.
- Is the AD7111A compatible with other DAC models?
Yes, the AD7111A is pin and function-compatible with the industry-standard AD7524.
- What is the power supply requirement for the AD7111ACRZ-REEL?
The device operates with a +5 V power supply.
- What is the typical propagation delay of the AD7111ACRZ-REEL?
The propagation delay is typically between 1-1.5 µs.
- How does the AD7111ACRZ-REEL interface with microprocessors?
The device is easily interfaced to a standard 8-bit MPU bus via an 8-bit data port and standard microprocessor control lines.
- What is the significance of the LC2MOS technology used in the AD7111ACRZ-REEL?
The LC2MOS technology combines precision bipolar circuits with low power CMOS logic, enhancing the device's performance and reliability.
- What are some common applications of the AD7111ACRZ-REEL?
Common applications include audio and video systems, industrial control systems, medical equipment, and telecommunications.
- How accurate is the attenuation provided by the AD7111ACRZ-REEL?
The attenuation accuracy is ≤ ±0.17 dB over the specified range.
