Overview
The AD7945ARSZ-BREEL is a high-performance, 12-bit multiplying Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This component is part of the AD7943, AD7945, and AD7948 series, which are designed to operate from a single +3.3 V to +5 V supply. The AD7945 specifically features a 12-bit parallel interface, making it suitable for applications requiring fast and precise analog output generation.
The AD7945 is engineered to replace industry-standard DACs like the AD7545, offering superior speed and power consumption. It is available in a 20-lead SSOP package, ensuring compact and efficient integration into various systems.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12 | Bits | |
| Interface | Parallel | 12-bit parallel interface | |
| Operating Temperature Range | -40 to 85 | °C | |
| Power (typical) | 25 µW | ||
| Settling Time (typical) | 600 ns | To 0.01% with AD843 | |
| Digital to Analog Glitch Impulse | 60 nV-s | Typical, VREF = 1.23 V | |
| Multiplying Feedthrough Error | -75 dB | Maximum | |
| Output Capacitance | 60 pF max | All 1s loaded to DAC |
Key Features
- High Resolution: 12-bit resolution ensuring precise analog output.
- Low Power Consumption: Typical power consumption of 25 µW, making it suitable for battery-powered devices.
- Fast Interface: 40 ns write pulsewidth for fast data transfer.
- Low Glitch: Digital to analog glitch impulse of 60 nV-s, reducing output distortion.
- Fast Settling Time: Settles to 0.01% in 600 ns with the AD843 amplifier.
- Multiple Package Options: Available in 20-lead DIP, SOP, and SSOP packages.
- Wide Operating Temperature Range: Operates from -40°C to 85°C.
Applications
- Battery-Powered Instrumentation: Ideal for devices requiring low power consumption and high precision.
- Laptop Computers: Suitable for upgrading existing DACs in laptop computers for better performance.
- Upgrades for All 754x Series DACs: Replaces industry-standard AD7543, AD7545, and AD7548 DACs with superior speed and power efficiency.
Q & A
- What is the resolution of the AD7945ARSZ-BREEL DAC?
The AD7945ARSZ-BREEL has a 12-bit resolution.
- What types of interfaces does the AD7945 support?
The AD7945 supports a 12-bit parallel interface.
- What is the typical power consumption of the AD7945?
The typical power consumption is 25 µW.
- What is the settling time of the AD7945?
The settling time is typically 600 ns to 0.01% with the AD843 amplifier.
- What is the operating temperature range of the AD7945?
The operating temperature range is from -40°C to 85°C.
- What package options are available for the AD7945?
The AD7945 is available in 20-lead DIP, SOP, and SSOP packages.
- What is the digital to analog glitch impulse of the AD7945?
The digital to analog glitch impulse is typically 60 nV-s.
- Is the AD7945 RoHS compliant?
Yes, the AD7945ARSZ-BREEL is RoHS compliant.
- What are some common applications of the AD7945?
Common applications include battery-powered instrumentation, laptop computers, and upgrades for existing DACs.
- How does the AD7945 compare to the AD7545?
The AD7945 offers superior speed and power consumption performance compared to the AD7545.
