Overview
The AD667KNZ is a microprocessor-compatible 12-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This device integrates a high stability buried Zener voltage reference and a double-buffered input latch on a single chip. The AD667KNZ is designed for precision and high performance, utilizing 12 precision high-speed bipolar current steering switches and a laser-trimmed thin-film resistor network. This configuration ensures fast settling times and high accuracy, making it suitable for a wide range of applications requiring precise analog output.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits |
| Logic Levels (TTL Compatible) | ||||
| VIH (Logic '1') | +2.0 | +5.5 | V | |
| VIL (Logic '0') | 0 | +0.8 | V | |
| IIH (VIH = 5.5 V) | 3 | 10 | µA | |
| IIL (VIL = 0.8 V) | 1 | 5 | µA | |
| Temperature Range | 0 | +70 | °C | |
| Linearity Error | ±1/4 LSB | |||
| Full-Scale Gain TC | 5 ppm/°C | |||
| Output Voltage Settling Time | 2 | 4 | µs | |
| Package Options | 28-Pin Plastic DIP (N), 28-Pin PLCC (P) |
Key Features
- High Stability Buried Zener Voltage Reference: Provides low noise and long-term stability, comparable to the best discrete reference diodes.
- Double-Buffered Input Latch: Allows direct interface to 4-, 8-, 12-, or 16-bit microprocessor buses and avoids the generation of spurious analog output values.
- Precision High-Speed Bipolar Current Steering Switches: Ensures fast settling times and high accuracy.
- Laser-Trimmed Thin-Film Resistor Network: Provides excellent linearity and temperature stability.
- Microprocessor Compatibility: Responds to strobe pulses as short as 100 ns, making it compatible with the fastest available microprocessors.
- Guaranteed Monotonicity: Over the full temperature range, ensuring reliable performance.
Applications
- Industrial Control Systems: Where precise analog outputs are required for control and monitoring.
- Medical Devices: For applications needing high accuracy and stability in analog output.
- Aerospace and Defense: In systems requiring reliable and precise digital-to-analog conversion over a wide temperature range.
- Automotive Systems: For control and monitoring systems that demand high performance and reliability.
- Test and Measurement Equipment: Where accurate and stable analog outputs are crucial.
Q & A
- What is the resolution of the AD667KNZ DAC?
The AD667KNZ has a resolution of 12 bits.
- What are the logic levels for the digital inputs of the AD667KNZ?
The logic levels are TTL compatible, with VIH (Logic '1') between +2.0 V and +5.5 V, and VIL (Logic '0') between 0 V and +0.8 V.
- What is the temperature range for the AD667KNZ?
The AD667KNZ is specified for use over the 0°C to +70°C temperature range.
- What is the maximum linearity error of the AD667KNZ?
The maximum linearity error is ±1/4 LSB at +25°C.
- What types of packages are available for the AD667KNZ?
The AD667KNZ is available in 28-Pin Plastic DIP (N) and 28-Pin PLCC (P) packages.
- How does the double-buffered input latch work?
The double-buffered input latch allows data to be loaded directly from a microprocessor bus and then transferred to the second rank, avoiding spurious analog output values.
- What is the settling time for the output voltage of the AD667KNZ?
The output voltage settling time is typically 2 µs and maximally 4 µs.
- Is the AD667KNZ suitable for high-speed applications?
Yes, the AD667KNZ is designed to respond to strobe pulses as short as 100 ns, making it compatible with the fastest available microprocessors.
- What is the full-scale gain temperature coefficient of the AD667KNZ?
The full-scale gain temperature coefficient is 5 ppm/°C.
- Is the AD667KNZ guaranteed to be monotonic over its operating temperature range?
Yes, the AD667KNZ is guaranteed to be monotonic over its full operating temperature range.
