Overview
The AD7945BNZ 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 family, which are designed to operate from a single +5 V supply (Normal Mode) and a single +3.3 V to +5 V supply (Biased Mode). The AD7945 specifically features a 12-bit parallel interface, making it suitable for applications requiring fast and precise analog output generation.
The AD7945BNZ is available in a 20-lead PDIP package and is known for its low power consumption, fast interface, and low glitch performance. It is designed to replace industry-standard DACs like the AD7545, offering superior speed and power efficiency.
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 (typ) | 25 µW | ||
| Settling Time (typ) | 600 ns | To 0.01% with AD843 | |
| Digital to Analog Glitch Impulse | 60 nV-s | VREF = 1.23 V, DAC Register Alternately Loaded with All 0s and All 1s | |
| Output Noise Spectral Density @ 1 kHz | 25 nV/√Hz | VREF = 1.23 V, All 1s Loaded to DAC | |
| Package | 20-lead PDIP |
Key Features
- High Resolution: 12-bit resolution providing precise analog output.
- Low Power Consumption: Typical power consumption of 25 µW.
- Fast Interface: 40 ns write pulsewidth for fast data transfer.
- Low Glitch Performance: Digital to analog glitch impulse of 60 nV-s.
- Fast Settling Time: Settling time of 600 ns to 0.01% with AD843.
- Parallel Interface: 12-bit parallel interface for efficient data loading.
- Operating Voltage Flexibility: Operates from a single +5 V supply or a single +3.3 V to +5 V supply.
Applications
- Battery-Powered Instrumentation: Ideal for battery-powered devices due to low power consumption.
- Laptop Computers: Suitable for laptop applications requiring high precision and low power.
- Upgrades for All 754x Series DACs: Designed to replace industry-standard AD7543, AD7545, and AD7548 DACs.
Q & A
- What is the resolution of the AD7945BNZ DAC?
The AD7945BNZ has a 12-bit resolution.
- What type of interface does the AD7945BNZ use?
The AD7945BNZ uses a 12-bit parallel interface.
- What is the typical power consumption of the AD7945BNZ?
The typical power consumption is 25 µW.
- What is the settling time of the AD7945BNZ?
The settling time is 600 ns to 0.01% with AD843.
- What is the operating temperature range of the AD7945BNZ?
The operating temperature range is -40 to 85 °C.
- What package types are available for the AD7945BNZ?
The AD7945BNZ is available in a 20-lead PDIP package.
- What is the digital to analog glitch impulse of the AD7945BNZ?
The digital to analog glitch impulse is 60 nV-s.
- What is the output noise spectral density of the AD7945BNZ at 1 kHz?
The output noise spectral density at 1 kHz is 25 nV/√Hz.
- Can the AD7945BNZ operate from different supply voltages?
Yes, it can operate from a single +5 V supply or a single +3.3 V to +5 V supply.
- What are some common applications of the AD7945BNZ?
Common applications include battery-powered instrumentation, laptop computers, and upgrades for all 754x series DACs.
