Overview
The AD7545KN is a monolithic 12-bit CMOS multiplying Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. It is designed with onboard data latches and is particularly suitable for single supply operation and applications with wide temperature variations. The device can operate with supply voltages ranging from +5 V to +15 V and interfaces directly with most 12- and 16-bit bus systems. The AD7545KN is known for its low power consumption, dissipating less than 0.5 mW at VDD = +5 V, making it ideal for battery-operated equipment.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Supply Voltage | +5 V to +15 V | V |
| Input High Voltage (VIH) | 2.4 V min, 13.5 V max | V |
| Input Low Voltage (VIL) | 0.8 V max, 1.5 V max | V |
| Input Current (IIN) | ±1 µA max, ±10 µA max | µA |
| Input Capacitance | 5 pF max (DB0-DB11), 20 pF max (WR, CS) | pF |
| Output Capacitance (COUT) | 70 pF max (DB0-DB11 = 0 V), 200 pF max (DB0-DB11 = VDD) | pF |
| Chip Select to Write Setup Time (tCS) | 280 ns min, 200 ns typ | ns |
| Write Pulse Width (tWR) | 250 ns min, 175 ns typ | ns |
| Temperature Range | 0°C to +70°C | °C |
| Gain Error | ±1 LSB at +25°C (VDD = +5 V) | LSB |
Key Features
- Monolithic 12-bit CMOS multiplying DAC with onboard data latches.
- Single 12-bit wide word loading and direct interface to most 12- and 16-bit bus systems.
- Operates with supply voltages from +5 V to +15 V.
- Low power consumption: less than 0.5 mW at VDD = +5 V.
- CMOS logic levels at inputs.
- Fast TTL compatible data latches.
- Latch free operation (Schottky protection diode not required).
- Ideal for battery-operated equipment.
- Proprietary ESD protection circuitry.
Applications
- Single supply operation and applications with wide temperature variations.
- Unipolar and bipolar circuits.
- DAC as a multiplier and attenuator.
- DAC as a divider or programmable gain element.
- Programmable integrator circuits.
- D/A converters and programmable power supplies.
- CMOS DAC as a calibration trimmer.
- Precision gain summing amplifiers and instrumentation amplifiers.
- Programmable current sources and 4-20mA loop circuits.
- Low frequency function generation and AGC systems.
Q & A
- What is the resolution of the AD7545KN DAC?
The AD7545KN has a 12-bit resolution.
- What is the operating supply voltage range for the AD7545KN?
The AD7545KN operates with supply voltages from +5 V to +15 V.
- What is the typical power consumption of the AD7545KN at VDD = +5 V?
The device dissipates less than 0.5 mW at VDD = +5 V.
- What are the input high and low voltage levels for the AD7545KN?
The input high voltage (VIH) is 2.4 V min and 13.5 V max, while the input low voltage (VIL) is 0.8 V max and 1.5 V max.
- What is the temperature range for the AD7545KN?
The temperature range for the AD7545KN is 0°C to +70°C.
- What is the gain error of the AD7545KN at +25°C (VDD = +5 V)?
The gain error is ±1 LSB at +25°C (VDD = +5 V).
- Does the AD7545KN require a Schottky protection diode for latch operation?
No, the AD7545KN does not require a Schottky protection diode for latch operation.
- What are some common applications of the AD7545KN?
Common applications include unipolar and bipolar circuits, DAC as a multiplier and attenuator, programmable integrator circuits, and more.
- Does the AD7545KN have built-in ESD protection?
- How does the AD7545KN interface with bus systems?
The AD7545KN directly interfaces to most 12- and 16-bit bus systems.
- What is the significance of the onboard data latches in the AD7545KN?
The onboard data latches allow data to be loaded under the control of the CS and WR inputs, enabling direct unbuffered operation of the DAC.
