Overview
The AD7111ACR-REEL, produced by Analog Devices Inc., is a monolithic multiplying Digital-to-Analog Converter (DAC) known as the LOGDAC. This component features a wide dynamic range and is part of the AD7111/AD7111A series. It is designed to attenuate an analog input signal over a range of 0 dB to 88.5 dB in 0.375 dB steps, making it highly versatile for various applications. The AD7111ACR-REEL is available in a 16-pin SOIC package and is fabricated using Linear Compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low power CMOS logic.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Dynamic Range | 0 dB to 88.5 dB | dB | In 0.375 dB steps |
| Resolution | 0.375 dB | dB | |
| Accuracy Relative to 0 dB Attenuation | ≤ ±0.17 dB | dB | For 0 to 36 dB range |
| Package Type | 16-pin SOIC | ||
| Operating Voltage | +5 V | V | |
| Data Interface | 8-bit data port | Edge triggered for AD7111, level triggered for AD7111A |
Key Features
- Wide Dynamic Range: Attenuation range of 0 dB to 88.5 dB in 0.375 dB steps.
- Small Package: Available in 16-pin DIP and SOIC packages, with the AD7111 also available in a 20-terminal LCCC package.
- Transparent Latch Operation: The AD7111A allows transparent operation of the latches by tying the CS and WR inputs low.
- Fast Microprocessor Interface: Data setup times of 25 ns and write pulse width of 57 ns, making it compatible with modern microprocessors.
- Pin and Function Compatibility: The AD7111A is pin and function-compatible with the AD7524, an industry standard 8-bit multiplying DAC.
Applications
- Audio Attenuators: Ideal for applications requiring precise control over audio signal levels.
- Sonar Systems: Used in sonar systems for dynamic range adjustment.
- Function Generators: Utilized in function generators to provide fine-tuned signal attenuation.
- Digitally Controlled AGC Systems: Suitable for Automatic Gain Control (AGC) systems that require digital control over signal attenuation.
Q & A
- What is the dynamic range of the AD7111ACR-REEL?
The dynamic range is from 0 dB to 88.5 dB in 0.375 dB steps.
- What package types are available for the AD7111/AD7111A?
The AD7111/AD7111A are available in 16-pin DIP, SOIC, and for the AD7111, a 20-terminal LCCC package.
- How does the AD7111A differ from the AD7111 in terms of latch operation?
The AD7111A allows transparent operation of the latches by tying the CS and WR inputs low, whereas the AD7111 requires a rising edge on the WR input to load new data.
- Is the AD7111A compatible with the AD7524?
- What is the operating voltage of the AD7111ACR-REEL?
The operating voltage is +5 V.
- How does the AD7111/AD7111A interface with microprocessors?
The AD7111/AD7111A are easily interfaced to a standard 8-bit MPU bus via an 8-bit data port and standard microprocessor control lines.
- What technology is used to fabricate the AD7111/AD7111A?
The AD7111/AD7111A are fabricated using Linear Compatible CMOS (LC2MOS) technology.
- What are some typical applications of the AD7111ACR-REEL?
Typical applications include audio attenuators, sonar systems, function generators, and digitally controlled AGC systems.
- What is the resolution of the AD7111ACR-REEL?
The resolution is 0.375 dB.
- What is the accuracy of the AD7111ACR-REEL relative to 0 dB attenuation?
The accuracy is ≤ ±0.17 dB for the 0 to 36 dB range.
