Overview
The AD7111ACNZ, produced by Analog Devices Inc., is a monolithic multiplying Digital-to-Analog Converter (DAC) known as the LOGDAC. This device is renowned for its wide dynamic range and fine step resolution, making it suitable for various precision applications. The AD7111ACNZ is part of the AD7111/AD7111A series, which offers advanced features such as transparent latch operation and compatibility with modern microprocessors.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Nominal Resolution | 0.375 | dB | |
| Accuracy Relative to 0 dB Attenuation | ±0.17 dB | 0 to 36 dB range | |
| Dynamic Range | 0 dB to 88.5 dB | In 0.375 dB steps | |
| Package Types | 16-pin DIP, SOIC, 20-terminal LCCC | ||
| Power Supply Voltage (VDD) | +5 V | V | |
| Input Leakage Current | ±1 µA max | µA | Digital Inputs = VDD |
| Data Setup Time (tDS) | 25 ns min | ns | Data Valid to Write Setup Time |
| Write Pulse Width (tWR) | 57 ns min | ns | |
| Propagation Delay | 1 µs max | µs | Full-Scale Change |
Key Features
- Wide Dynamic Range: The AD7111ACNZ can attenuate an analog input signal over a range of 0 dB to 88.5 dB in 0.375 dB steps.
- Small Package: Available in 16-pin DIPs, SOIC packages, and a 20-terminal LCCC package.
- Transparent Latch Operation: The DAC latches can be made transparent by tying the CS and WR inputs low.
- Fast Microprocessor Interface: Compatible with modern microprocessors with data setup times of 25 ns and a write pulse width of 57 ns.
- High Resolution: Uses a 17-bit R-2R ladder for very fine step resolution.
Applications
The AD7111ACNZ is suitable for a variety of applications that require precise analog signal attenuation, such as audio processing, medical equipment, industrial control systems, and telecommunications. Its compatibility with standard 8-bit microprocessor buses makes it an excellent choice for integrating into existing systems.
Q & A
- What is the dynamic range of the AD7111ACNZ?
The AD7111ACNZ has a dynamic range of 0 dB to 88.5 dB in 0.375 dB steps. - What are the package options for the AD7111ACNZ?
The AD7111ACNZ is available in 16-pin DIP, SOIC, and 20-terminal LCCC packages. - How does the AD7111ACNZ interface with microprocessors?
The AD7111ACNZ is easily interfaced to a standard 8-bit MPU bus via an 8-bit data port and standard microprocessor control lines. - What is the resolution of the AD7111ACNZ?
The AD7111ACNZ uses a 17-bit R-2R ladder, providing a resolution of 0.375 dB steps. - Can the DAC latches be made transparent?
Yes, the DAC latches can be made transparent by tying the CS and WR inputs low. - What is the power supply voltage for the AD7111ACNZ?
The power supply voltage (VDD) for the AD7111ACNZ is +5 V. - What is the input leakage current of the AD7111ACNZ?
The input leakage current is ±1 µA max when digital inputs are at VDD. - What is the propagation delay of the AD7111ACNZ?
The propagation delay is 1 µs max for a full-scale change. - In what types of applications is the AD7111ACNZ commonly used?
The AD7111ACNZ is commonly used in audio processing, medical equipment, industrial control systems, and telecommunications. - Is the AD7111ACNZ compatible with existing AD7524 designs?
Yes, the AD7111A is exactly pin and function-compatible with the AD7524, allowing for easy upgrades.
