Overview
The DAC8581IPW, produced by Texas Instruments, is a 16-bit, high-speed, low-noise digital-to-analog converter (DAC) designed for high-performance applications. This device features a monotonic, resistor string architecture and a high-performance bipolar output buffer, enabling fast settling times and exceptionally low noise. The DAC8581 operates from dual ±5-V power supplies and supports a single external reference. It includes a power-on-reset circuit that sets the output to midscale voltage on power-up and a hardware reset feature. The device is compatible with 1.8-V to 5.5-V logic and uses a standard 3-wire SPI interface with clock rates up to 50 MHz.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 | Bits |
| Linearity Error | ±0.03 to ±0.1 | %FS |
| Differential Linearity Error | ±0.25 to ±0.5 | LSB |
| Gain Error | 1 to 3 | %FS |
| Gain Drift | ±5 | ppm/°C |
| Bipolar Zero Error | -5 to ±25 | mV |
| Bipolar Zero Drift | ±20 | μV/°C |
| Total Drift | ±10 | ppm/°C |
| Output Voltage Range | ±VREF | V |
| Output Impedance | 600 Ω | Ω |
| Reference Input Bandwidth | 3 MHz (large signal), 10 MHz (small signal) | MHz |
| Reference Input Voltage Range | 3 V to AVDD | V |
| Reference Input Impedance | 5 kΩ | kΩ |
| Update Rate | Up to 3 MSPS | MSPS |
| Settling Time | 0.65 μs (large signal), < 0.3 μs (small signal) | μs |
| Noise Performance | 20 nV/√Hz | nV/√Hz |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | TSSOP-16 |
Key Features
- High-speed, 16-bit digital-to-analog conversion with monotonic performance.
- Low noise: 20 nV/√Hz, and exceptionally low glitch (0.5 nV-s).
- Bipolar output buffer capable of driving ±5-V loads with fast settling times (0.65 μs for large signals, < 0.3 μs for small signals).
- Single external reference input with internal buffering.
- Power-on-reset and hardware reset to midscale voltage.
- 3-wire SPI interface compatible with 1.8-V to 5.5-V logic, up to 50 MHz clock rate.
- Operating from dual ±5-V power supplies.
- Temperature range: -40°C to +85°C.
Applications
- High-performance data acquisition systems.
- Medical imaging and diagnostic equipment.
- Aerospace and defense applications requiring high precision and low noise.
- Industrial control systems and automation.
- Scientific instruments and test equipment.
- Audio and video signal processing.
Q & A
- What is the resolution of the DAC8581?
The DAC8581 has a resolution of 16 bits.
- What is the typical noise performance of the DAC8581?
The DAC8581 has a noise performance of 20 nV/√Hz.
- What is the maximum update rate of the DAC8581?
The DAC8581 supports update rates up to 3 MSPS.
- What is the settling time for large signal changes in the DAC8581?
The settling time for large signal changes is 0.65 μs.
- What is the operating temperature range of the DAC8581?
The operating temperature range is -40°C to +85°C.
- What type of interface does the DAC8581 use?
The DAC8581 uses a 3-wire SPI interface.
- Is the DAC8581 compatible with different logic levels?
Yes, it is compatible with 1.8-V to 5.5-V logic.
- What is the output voltage range of the DAC8581?
The output voltage range is ±VREF.
- Does the DAC8581 have a power-on-reset feature?
Yes, it has a power-on-reset circuit that sets the output to midscale voltage on power-up.
- What is the package type of the DAC8581IPW?
The package type is TSSOP-16.
