Overview
The AD7945BRS-REEL is a 12-bit multiplying Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This device is part of the AD7943, AD7945, and AD7948 family, which are designed to replace industry-standard DACs such as the AD7543, AD7545, and AD7548. The AD7945 offers superior speed and power consumption performance, making it suitable for a variety of applications requiring high precision and efficiency.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12 | Bits | 1 LSB = VREF/2^12 = 2.44 mV when VREF = 10 V |
| Power Supply Range | 4.5 to 5.5 V | V | Single supply operation |
| Power Consumption (IDD) | 5 µA max (typical 1 µA) | µA | VINH = VDD – 0.1 V, VINL = 0.1 V, SRO Open Circuit, No STB Signal |
| Settling Time | 600 µs (typical) | µs | |
| Operating Temperature | -40°C to 85°C | °C | |
| Package Type | 20-SSOP (Shrink Small Outline Package) | ||
| Data Interface | Parallel | 12-bit parallel interface | |
| Output Type | Current - Unbuffered | ||
| INL/DNL | ±0.5 LSB (max) | LSB |
Key Features
- High Resolution: 12-bit resolution providing precise analog output.
- Fast Settling Time: Typical settling time of 600 µs, ensuring rapid conversion.
- Low Power Consumption: Maximum current consumption of 5 µA, with typical values as low as 1 µA.
- Single Supply Operation: Operates from a single +3.3 V to +5 V supply, making it versatile for various applications.
- Parallel Interface: 12-bit parallel interface for efficient data transfer.
- Compact Packaging: Available in 20-lead SSOP, DIP, and SOIC packages, suitable for space-constrained designs.
- High Accuracy: INL and DNL of ±0.5 LSB, ensuring high accuracy in analog output.
Applications
- Industrial Control Systems: Used in control systems that require precise analog outputs to control various parameters such as temperature, pressure, and flow rate.
- Medical Devices: Suitable for medical equipment that demands high accuracy and reliability in analog signal generation.
- Aerospace and Defense: Employed in military and aerospace applications where high precision and reliability are critical.
- Automotive Systems: Used in automotive control systems for functions such as engine control, transmission control, and safety systems.
- Test and Measurement Equipment: Utilized in test and measurement instruments that require accurate and stable analog outputs.
Q & A
- What is the resolution of the AD7945BRS-REEL DAC?
The AD7945BRS-REEL has a 12-bit resolution, providing 4096 possible output levels.
- What is the typical settling time of the AD7945BRS-REEL?
The typical settling time is 600 µs.
- What is the power supply range for the AD7945BRS-REEL?
The device operates from a single +3.3 V to +5 V supply.
- What type of data interface does the AD7945BRS-REEL use?
The AD7945BRS-REEL uses a 12-bit parallel interface.
- What is the maximum current consumption of the AD7945BRS-REEL?
The maximum current consumption is 5 µA, with a typical value of 1 µA.
- What are the available package types for the AD7945BRS-REEL?
The device is available in 20-lead SSOP, DIP, and SOIC packages.
- What is the operating temperature range of the AD7945BRS-REEL?
The operating temperature range is -40°C to 85°C.
- Is the AD7945BRS-REEL RoHS compliant?
Yes, the AD7945BRS-REEL is lead-free and RoHS compliant.
- What is the INL/DNL specification for the AD7945BRS-REEL?
The INL and DNL are specified as ±0.5 LSB (max).
- Can the AD7945BRS-REEL be used in single-supply applications?
Yes, the AD7945BRS-REEL can operate in both normal and biased current modes for single-supply applications.
