Overview
The AD561KD is a low-cost, 10-bit monolithic digital-to-analog converter (DAC) produced by Analog Devices Inc. This integrated circuit combines a high-stability voltage reference and a laser-trimmed thin-film SiCr resistor network on a single monolithic chip. The device is designed to produce fast and accurate analog output currents, making it one of the most accurate and stable 10-bit DACs available.
The AD561KD is part of the AD561 family, which is known for its advanced monolithic processing and laser trimming at the wafer level. This ensures high accuracy and stability while maintaining cost-effectiveness suitable for large volume integrated circuit production.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 10 bits |
| Accuracy | ±1/4 LSB max (K and T versions), ±1/2 LSB max (J and S versions) |
| Differential Nonlinearity | <1 LSB |
| Monotonicity | Guaranteed over full operating temperature range |
| Temperature Coefficient | Typical: 15 ppm/°C, Max: 30 ppm/°C (K and T versions), 60 ppm/°C (S version), 80 ppm/°C (J version) |
| Operating Temperature Range | 0°C to +70°C (K and J versions), -55°C to +125°C (S and T versions) |
| Package | 16-pin hermetically-sealed ceramic DIP or 16-pin molded plastic DIP |
| Digital Input Logic | TTL, CMOS compatible |
| Settling Time | <250 ns for high-order bits, <200 ns for low-order bits |
Key Features
- Advanced Monolithic Processing and Laser Trimming: Ensures high accuracy and stability while maintaining cost-effectiveness.
- High Stability Voltage Reference: Utilizes a low noise, high stability subsurface zener diode for excellent long-term stability and temperature cycle characteristics.
- Fast and Accurate Analog Output: High-speed current-steering switches settle in less than 250 ns for the worst-case digital code transition.
- Digital System Interfacing: Simplified by the use of positive true straight binary code, compatible with TTL and CMOS logic families.
- Temperature Compensation: Laser-trimmed circuit for custom correction of the temperature coefficient of each device.
Applications
- Successive-Approximation A/D Converters: Can be constructed in the 3 µs to 5 µs range using the AD561.
- Digital 4-20 mA or 1-5 V Line Drivers: Directly built with the AD561 as shown in the datasheet.
- Industrial Control Systems: Suitable for applications requiring precise and stable analog outputs in various industrial environments.
- Medical and Scientific Instruments: Ideal for applications needing high accuracy and stability in analog output signals.
Q & A
- What is the resolution of the AD561KD?
The AD561KD has a resolution of 10 bits.
- What is the accuracy of the AD561KD?
The accuracy is ±1/4 LSB max for the K and T versions, and ±1/2 LSB max for the J and S versions.
- What is the operating temperature range of the AD561KD?
The operating temperature range is 0°C to +70°C for the K and J versions, and -55°C to +125°C for the S and T versions.
- What type of digital input logic does the AD561KD support?
The AD561KD supports TTL and CMOS compatible digital input logic.
- How long does it take for the AD561KD to settle?
The settling time is less than 250 ns for high-order bits and less than 200 ns for low-order bits.
- What is the purpose of the laser-trimmed temperature compensation circuit?
The laser-trimmed temperature compensation circuit allows custom correction of the temperature coefficient of each device, ensuring high stability over the operating temperature range.
- Can the AD561KD be used in successive-approximation A/D converters?
Yes, the AD561KD can be used to construct successive-approximation A/D converters in the 3 µs to 5 µs range).
- What types of packages are available for the AD561KD?
The AD561KD is available in 16-pin hermetically-sealed ceramic DIP and 16-pin molded plastic DIP packages).
- How does the AD561KD ensure monotonicity?
The AD561KD ensures monotonicity by guaranteeing that the output either increases or remains constant for increasing digital inputs, making it a single-valued function of the input over the full operating temperature range).
- What is the significance of the high stability voltage reference in the AD561KD?
The high stability voltage reference, produced by a low noise, high stability subsurface zener diode, provides excellent long-term stability and temperature cycle characteristics, comparable to the best discrete Zener references).
