Overview
The AD7945ARS-BREEL is a 12-bit multiplying digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is designed to offer high precision and speed, making it suitable for a variety of applications that require accurate analog output. The AD7945 is part of a family of DACs that include the AD7943 and AD7948, each offering similar performance characteristics but with different package options.
Key Specifications
| Parameter | Description | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12 bits | - | 1 LSB = VREF/2^12 = 2.44 mV when VREF = 10 V |
| Relative Accuracy | - | - | DAC Latch Alternately Loaded with All 0s and All 1s |
| Digital to Analog Glitch Impulse | 60 nV-s typ | - | VREF = 1.23 V, DAC Register Alternately Loaded with All 0s and All 1s |
| Multiplying Feedthrough Error | -75 dB max | - | DAC Latch Loaded with All 0s |
| Output Capacitance | 60 pF max (All 1s Loaded), 30 pF max (All 0s Loaded) | pF | - |
| Digital Feedthrough | 5 nV-s typ | - | Feedthrough to the DAC Output with LD1, LD2 High and Alternate Loading of All 0s and All 1s into the Input Shift Register |
| Total Harmonic Distortion | -83 dB typ | - | - |
| Output Noise Spectral Density @ 1 kHz | 25 nV/√Hz typ | nV/√Hz | All 1s Loaded to DAC, VREF = 1.23 V |
| Settling Time | 2 μs to 0.01% | μs | - |
| Supply Voltage | +3 V to +3.6 V, +4.5 V to +5.5 V | V | - |
| Package | 20-lead SSOP | - | - |
Key Features
- 12-bit Resolution: Offers high precision with 12-bit resolution, ensuring accurate analog output.
- Monotonic Over Temperature: Maintains monotonicity over the entire temperature range, ensuring reliable performance.
- Parallel Interface: Features a parallel data interface for easy integration into various systems.
- Double-Buffered Input Logic: Allows for simultaneous loading of data while the DAC is in operation, enhancing system efficiency.
- Low Power Operation: Designed to consume low power, making it suitable for battery-powered and power-sensitive applications.
- Short Settling Time: Settles to 0.01% in 2 μs, enhancing the speed of the system.
- High Precision Output: Provides high precision output with minimal noise and distortion.
- Robust Latch-Up Performance: Ensures reliable operation with robust latch-up performance.
Applications
- Industrial Control Systems: Suitable for precision control in industrial automation and process control.
- Medical Devices: Used in medical equipment where high precision and reliability are critical.
- Aerospace and Defense: Employed in various aerospace and defense applications requiring high accuracy and reliability.
- Automotive Systems: Applied in automotive systems for precise control and monitoring.
- Test and Measurement Equipment: Utilized in test and measurement instruments for accurate analog output.
Q & A
- What is the resolution of the AD7945ARS-BREEL?
The AD7945ARS-BREEL has a 12-bit resolution.
- What are the available package options for the AD7945?
The AD7945 is available in 20-lead DIP, 20-lead SOP, and 20-lead SSOP packages.
- What is the typical settling time of the AD7945?
The settling time is typically 2 μs to 0.01%.
- What is the supply voltage range for the AD7945?
The supply voltage range is +3 V to +3.6 V and +4.5 V to +5.5 V.
- Does the AD7945 have a parallel interface?
Yes, the AD7945 features a parallel data interface.
- Is the AD7945 monotonic over temperature?
Yes, the AD7945 maintains monotonicity over the entire temperature range.
- What is the typical output noise spectral density at 1 kHz?
The output noise spectral density at 1 kHz is typically 25 nV/√Hz.
- What is the maximum output capacitance?
The maximum output capacitance is 60 pF when all bits are loaded to 1 and 30 pF when all bits are loaded to 0.
- Is the AD7945 suitable for low power applications?
Yes, the AD7945 is designed for low power operation.
- What is the total harmonic distortion of the AD7945?
The total harmonic distortion is typically -83 dB.
