Overview
The AD5445YRU is a 12-bit current output digital-to-analog converter (DAC) produced by Analog Devices Inc. This device is part of the AD5424/AD5433/AD5445 family, which includes 8-, 10-, and 12-bit DACs, respectively. The AD5445YRU operates from a 2.5 V to 5.5 V power supply, making it suitable for a wide range of applications, including battery-powered devices and other systems requiring low power consumption.
The device features a fast parallel interface with a write cycle time of 17 ns and an update rate of up to 20.4 MSPS. It is designed with a CMOS submicron process, ensuring excellent 4-quadrant multiplication characteristics and a large signal multiplying bandwidth of up to 10 MHz.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Resolution | 12 Bits | ||||
| Relative Accuracy | ±1 LSB | ||||
| Differential Nonlinearity | -1 | +2 LSB | Guaranteed monotonic | ||
| Power Supply Range | 2.5 V | 5.5 V | V | ||
| Power Consumption | 0.4 µA | 5 µA | µA | Typical at 25°C, logic inputs = 0 V or VDD | |
| Operating Temperature | -40°C | +125°C | °C | ||
| Settling Time | 120 ns | ns | |||
| Package | 20-TSSOP |
Key Features
- Fast Parallel Interface: 17 ns write cycle time and an update rate of up to 20.4 MSPS.
- High Resolution: 12-bit current output DAC with guaranteed monotonicity.
- Low Power Consumption: Typical power consumption of 0.4 µA at 25°C.
- Wide Operating Temperature Range: -40°C to +125°C.
- 4-Quadrant Multiplication: Large signal multiplying bandwidth of up to 10 MHz.
- Power-on Reset with Brownout Detection: Ensures the DAC outputs are at zero scale on power-up.
- Data Readback Function: Allows the user to read the contents of the DAC register via the DB pins.
- Integrated Feedback Resistor (RFB): Provides temperature tracking and full-scale voltage output when combined with an external current to voltage precision amplifier.
Applications
- Portable Battery-Powered Applications: Suitable due to low power consumption.
- Waveform Generators: High update rates and precision make it ideal for generating waveforms.
- Analog Processing and Instrumentation: Used in various analog processing and instrumentation applications.
- Programmable Amplifiers and Attenuators: Can be used for digitally controlled calibration and trimming.
- Programmable Filters and Oscillators: Useful in applications requiring programmable filters and oscillators.
- Composite Video and Ultrasound: Suitable for applications involving composite video and ultrasound.
Q & A
- What is the resolution of the AD5445YRU DAC?
The AD5445YRU is a 12-bit current output DAC.
- What is the operating power supply range for the AD5445YRU?
The device operates from a 2.5 V to 5.5 V power supply.
- What is the typical power consumption of the AD5445YRU at 25°C?
The typical power consumption is 0.4 µA at 25°C.
- What is the settling time of the AD5445YRU?
The settling time is typically 120 ns.
- Does the AD5445YRU support 4-quadrant multiplication?
Yes, it supports 4-quadrant multiplication with a large signal multiplying bandwidth of up to 10 MHz.
- What is the package type of the AD5445YRU?
The device is packaged in a 20-TSSOP.
- What is the operating temperature range of the AD5445YRU?
The operating temperature range is -40°C to +125°C.
- Does the AD5445YRU have a power-on reset feature?
Yes, it has a power-on reset feature with brownout detection.
- Can the AD5445YRU read back its DAC register contents?
Yes, it has a data readback function via the DB pins.
- What are some common applications of the AD5445YRU?
Common applications include portable battery-powered devices, waveform generators, analog processing, instrumentation, programmable amplifiers and attenuators, and more.
