Overview
The AD7111ACR is a monolithic multiplying Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This component is part of the LOGDAC® series and is known for its wide dynamic range and fine step resolution. The AD7111ACR is fabricated using Linear Compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low power CMOS logic. This DAC is available in a 16-pin SOIC package and is designed to provide high performance in various applications.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Dynamic Range | 0 dB to 88.5 dB | - | Attenuation range in 0.375 dB steps |
| Resolution | 0.375 dB | - | Accuracy ≤ ±0.17 dB |
| Package | 16-pin SOIC | - | Tape & Reel (TR) |
| Supply Voltage | +5 V | V | - |
| Power Consumption | 1-2 mA | mA | CS = WR = 0 V, Digital Inputs = VIL or VIH |
| Data Setup Time | 25 ns | ns | Data Valid to Write Setup Time |
| Write Pulse Width | 57 ns | ns | - |
| Propagation Delay | 1-1.5 µs | µs | Full-Scale Change Measured from WR Going High, CS = 0 V |
Key Features
- Wide Dynamic Range: The AD7111ACR offers a wide dynamic range of 0 dB to 88.5 dB in 0.375 dB steps, making it suitable for applications requiring precise attenuation control.
- Small Package: Available in 16-pin DIP and SOIC packages, the AD7111ACR is compact and suitable for space-constrained designs.
- Transparent Latch Operation: The DAC latches in the AD7111ACR can be made transparent by tying the CS and WR inputs low, allowing for continuous operation without interruptions.
- Fast Microprocessor Interface: With data setup times of 25 ns and a write pulse width of 57 ns, the AD7111ACR is compatible with modern microprocessors.
- Pin and Function Compatibility: The AD7111ACR is pin and function-compatible with the AD7524, an industry standard 8-bit multiplying DAC, making it easy to upgrade existing designs.
Applications
- Audio Attenuators: The AD7111ACR is suitable for audio applications where precise attenuation control is necessary.
- Sonar Systems: Its wide dynamic range and fine step resolution make it ideal for sonar systems requiring accurate signal attenuation.
- Function Generators: The component can be used in function generators to provide precise control over signal levels.
- Digitally Controlled AGC Systems: The AD7111ACR is used in digitally controlled Automatic Gain Control (AGC) systems where dynamic range and precision are critical.
Q & A
- What is the dynamic range of the AD7111ACR?
The AD7111ACR has a dynamic range of 0 dB to 88.5 dB in 0.375 dB steps.
- What package types are available for the AD7111ACR?
The AD7111ACR is available in 16-pin DIP and SOIC packages.
- How does the AD7111ACR interface with microprocessors?
The AD7111ACR interfaces with microprocessors via an 8-bit data port and standard microprocessor control lines, with data setup times of 25 ns and a write pulse width of 57 ns.
- Is the AD7111ACR compatible with other DAC models?
Yes, the AD7111ACR is pin and function-compatible with the AD7524, an industry standard 8-bit multiplying DAC).
- What is the supply voltage for the AD7111ACR?
The supply voltage for the AD7111ACR is +5 V).
- What are the power consumption characteristics of the AD7111ACR?
The power consumption of the AD7111ACR is 1-2 mA, depending on the state of the CS and WR inputs).
- What is the propagation delay of the AD7111ACR?
The propagation delay of the AD7111ACR is 1-1.5 µs, measured from the WR going high with CS = 0 V).
- Can the AD7111ACR be used in audio applications?
Yes, the AD7111ACR is suitable for audio applications due to its wide dynamic range and fine step resolution).
- How does the transparent latch operation work in the AD7111ACR?
The DAC latches in the AD7111ACR can be made transparent by tying the CS and WR inputs low, allowing for continuous operation without interruptions).
- What is the significance of the LC2MOS technology used in the AD7111ACR?
The LC2MOS technology combines precision bipolar circuits with low power CMOS logic, enhancing the performance and efficiency of the DAC).
