Overview
The AD7111ABNZ, produced by Analog Devices Inc., is a logarithmic Digital-to-Analog Converter (DAC) designed for applications requiring precise attenuation control. This component is part of the AD7111/AD7111A series, which offers advanced features such as a wide dynamic range and high resolution. The AD7111ABNZ is fabricated using Linear Compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low power CMOS logic.
Key Specifications
| Parameter | Conditions/Comments | Units | Typical/Maximum Values |
|---|---|---|---|
| Nominal Resolution | Attenuation steps | dB | 0.375 dB |
| Accuracy Relative to 0 dB Attenuation | 0 to 36 dB range | dB | ≤ ±0.17 dB |
| Power Supply Voltage (VDD) | Digital Inputs = VIL or VIH | V | +5 V |
| Supply Current (IDD) | CS = WR = 0 V | mA | 1 to 2 mA |
| Data Setup Time (tDS) | Data valid to write setup time | ns | 25 ns |
| Write Pulse Width (tWR) | Write pulse width | ns | 57 ns |
| Propagation Delay | Full-scale change measured from WR going high | µs | 1 to 1.5 µs |
| Package Types | 16-pin DIP, SOIC, LCCC |
Key Features
- Wide Dynamic Range: The AD7111ABNZ offers an attenuation range of 0 dB to 88.5 dB in 0.375 dB steps, providing fine resolution and a wide range of attenuation control.
- Small Package Options: Available in 16-pin DIP, SOIC, and LCCC packages, making it suitable for various design requirements.
- Transparent Latch Operation: The DAC latches in the AD7111A can be made transparent by tying the CS and WR inputs low, allowing for seamless operation.
- Fast Microprocessor Interface: With data setup times of 25 ns and a write pulse width of 57 ns, this DAC is 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, facilitating easy upgrades in existing designs.
Applications
The AD7111ABNZ is suitable for various applications requiring precise digital-to-analog conversion and attenuation control, such as:
- Audio and video signal processing
- Industrial control systems
- Medical equipment
- Telecommunications
- Automotive systems
Q & A
- What is the nominal resolution of the AD7111ABNZ?
The nominal resolution is 0.375 dB per step.
- What is the accuracy relative to 0 dB attenuation for the AD7111ABNZ?
The accuracy is ≤ ±0.17 dB over the 0 to 36 dB range.
- What are the package options available for the AD7111ABNZ?
The component is available in 16-pin DIP, SOIC, and LCCC packages.
- How does the transparent latch operation work in the AD7111A?
The DAC latches can be made transparent by tying the CS and WR inputs low.
- Is the AD7111ABNZ compatible with modern microprocessors?
Yes, it has fast microprocessor interface capabilities with data setup times of 25 ns and a write pulse width of 57 ns.
- What is the power supply voltage requirement for the AD7111ABNZ?
The power supply voltage (VDD) is +5 V.
- What is the typical supply current for the AD7111ABNZ?
The typical supply current (IDD) is 1 to 2 mA.
- What is the propagation delay for the AD7111ABNZ?
The propagation delay is 1 to 1.5 µs for full-scale changes measured from WR going high.
- Is the AD7111ABNZ pin and function-compatible with other DACs?
Yes, it is pin and function-compatible with the AD7524, an industry-standard 8-bit multiplying DAC.
- What are some common applications for the AD7111ABNZ?
Common applications include audio and video signal processing, industrial control systems, medical equipment, telecommunications, and automotive systems.
