Overview
The AD7945BRS from Analog Devices Inc. is a high-performance, 12-bit multiplying digital-to-analog converter (DAC) designed to operate from a single +3.3 V to +5 V supply. This component is part of the AD7943, AD7945, and AD7948 family, which offers superior speed and power consumption compared to industry-standard predecessors like the AD7543, AD7545, and AD7548. The AD7945 features a 12-bit parallel interface, making it suitable for a wide range of applications requiring precise analog output control.
Key Specifications
| Parameter | Value | Units | Conditions |
|---|---|---|---|
| Resolution | 12 | Bits | |
| Supply Voltage | +3.3 V to +5 V | V | |
| Output Type | Current - Unbuffered | ||
| Settling Time | 600 µs (Typ) | µs | |
| Operating Temperature | -40°C to 85°C | °C | |
| Package Type | 20-SSOP | ||
| INL/DNL | ±0.5 (Max) | LSB | |
| Data Interface | Parallel | ||
| Digital Feedthrough | 5 nV-s (Typ) | nV-s | Alternate loading of all 0s and all 1s |
| Total Harmonic Distortion | -83 dB (Typ) | dB |
Key Features
- 12-bit resolution with a parallel interface for high-speed data transfer.
- Operates from a single +3.3 V to +5 V supply, enhancing flexibility in system design.
- Low power consumption and fast settling time of 600 µs (typical), making it suitable for high-performance applications.
- High accuracy with Integral Non-Linearity (INL) and Differential Non-Linearity (DNL) of ±0.5 LSB (maximum).
- Low digital feedthrough and total harmonic distortion, ensuring minimal noise and high signal integrity.
- Available in 20-pin SSOP package, offering a compact solution for space-constrained designs.
Applications
- Industrial control systems requiring precise analog output control.
- Aerospace and defense applications where high accuracy and reliability are crucial.
- Medical devices such as diagnostic equipment and patient monitoring systems.
- Automotive systems, including engine control units and safety systems.
- Test and measurement equipment where high precision and speed are necessary.
Q & A
- What is the resolution of the AD7945BRS DAC?
The AD7945BRS has a 12-bit resolution. - What is the supply voltage range for the AD7945BRS?
The AD7945BRS operates from a single +3.3 V to +5 V supply. - What type of output does the AD7945BRS provide?
The AD7945BRS provides an unbuffered current output. - What is the typical settling time of the AD7945BRS?
The typical settling time is 600 µs. - What is the operating temperature range of the AD7945BRS?
The operating temperature range is -40°C to 85°C. - What package types are available for the AD7945BRS?
The AD7945BRS is available in 20-pin SSOP packages. - What is the INL/DNL specification of the AD7945BRS?
The INL/DNL is ±0.5 LSB (maximum). - What is the data interface type of the AD7945BRS?
The data interface is parallel. - How does the AD7945BRS handle digital feedthrough?
The digital feedthrough is 5 nV-s (typical) during alternate loading of all 0s and all 1s. - What is the total harmonic distortion of the AD7945BRS?
The total harmonic distortion is -83 dB (typical).
