Overview
The AD7545BQ is a monolithic 12-bit CMOS multiplying Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This device features onboard data latches and is designed for single supply operation, making it suitable for applications with wide temperature variations. The AD7545BQ can be used with supply voltages ranging from +5 V to +15 V and is known for its low power consumption, dissipating less than 0.5 mW at VDD = +5 V with CMOS logic levels at the inputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 bits | |
| Supply Voltage | +5 V to +15 V | V |
| Input High Voltage (VIH) | 2.4 V to 13.5 V | V |
| Input Low Voltage (VIL) | 0.8 V to 1.5 V | V |
| Input Current (IIN) | ±1 µA to ±10 µA | µA |
| Input Capacitance | 5 pF to 20 pF | pF |
| Chip Select to Write Setup Time (tCS) | 280 ns to 380 ns | ns |
| Write Pulse Width (tWR) | 250 ns to 400 ns | ns |
| Package Type | 20-Lead CerDIP |
Key Features
- Monolithic 12-bit CMOS multiplying DAC with onboard data latches.
- Single supply operation from +5 V to +15 V.
- Low power consumption: less than 0.5 mW at VDD = +5 V with CMOS logic levels.
- Fast TTL compatible data latches.
- Latch free operation; no Schottky protection diode required.
- Direct interface to most 12- and 16-bit bus systems.
- R-2R architecture for the DAC.
Applications
- Battery-operated equipment due to low power consumption.
- Microprocessor interfacing: directly interfaces to 8- and 16-bit microprocessors.
- Unipolar and bipolar circuits: can be used in simple unipolar and bipolar configurations).
- Attenuation and multiplication: can function as a 2-quadrant multiplier or attenuator).
- Applications with wide temperature variations).
Q & A
- What is the resolution of the AD7545BQ DAC?
The AD7545BQ has a resolution of 12 bits).
- What is the supply voltage range for the AD7545BQ?
The AD7545BQ can operate with supply voltages from +5 V to +15 V).
- How much power does the AD7545BQ consume at VDD = +5 V?
The device dissipates less than 0.5 mW at VDD = +5 V with CMOS logic levels).
- What type of package is the AD7545BQ available in?
The AD7545BQ is available in a 20-Lead CerDIP package).
- Can the AD7545BQ be used with microprocessors?
Yes, it can directly interface to both 8- and 16-bit microprocessors).
- What are some common applications of the AD7545BQ?
Common applications include battery-operated equipment, unipolar and bipolar circuits, and applications with wide temperature variations).
- Does the AD7545BQ require a Schottky protection diode?
No, the AD7545BQ is latch free and does not require a Schottky protection diode).
- What is the architecture of the DAC in the AD7545BQ?
The DAC uses an R-2R architecture).
- Can the AD7545BQ function as a multiplier or attenuator?
Yes, it can function as a 2-quadrant multiplier or attenuator).
- What are the typical input high and low voltage levels for the AD7545BQ?
The input high voltage (VIH) is 2.4 V to 13.5 V, and the input low voltage (VIL) is 0.8 V to 1.5 V).
