Overview
The DAC8568IBPW is a 16-bit, octal-channel, ultra-low glitch, voltage output digital-to-analog converter (DAC) manufactured by Texas Instruments. This device is part of the DAC7568, DAC8168, and DAC8568 family, which are low-power, voltage-output DACs with 12-, 14-, and 16-bit resolutions, respectively. The DAC8568 features a 2.5V, 2ppm/°C internal reference (disabled by default), providing a full-scale output voltage range of 2.5V or 5V. It is designed for applications requiring high accuracy, low power consumption, and a small footprint, making it ideal for portable, battery-operated equipment, especially in the medical field for ultrasound data conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Number of Channels | 8 |
| Internal Reference Voltage | 2.5V (disabled by default) |
| Internal Reference Accuracy | 0.004% (typ) |
| Temperature Drift of Internal Reference | 2ppm/°C (typ), 5ppm/°C (max) |
| Glitch Energy | 0.1nV-s |
| Relative Accuracy | 4 LSB INL |
| Power Supply Range | +2.7V to +5.5V |
| Operating Temperature Range | –40°C to +125°C |
| Package Type | TSSOP-16 |
| Number of Pins | 16 |
| Serial Interface Clock Rate | Up to 50MHz |
| Power Consumption (including internal reference) | Typically 2.9mW at 3V, less than 1µW in power-down mode |
Key Features
- Ultra-low glitch energy: 0.1nV-s
- Internal 2.5V reference with 0.004% initial accuracy and 2ppm/°C temperature drift
- 20mA sink/source capability at the VREFIN/VREFOUT pin
- Power-on reset to zero scale or midscale
- Ultralow power operation: 1.25mA at 5V including internal reference current
- Wide power-supply range: +2.7V to +5.5V
- Monotonic over entire temperature range
- Low-power serial interface with Schmitt-triggered inputs: up to 50MHz
- On-chip output buffer amplifier with rail-to-rail operation
- Temperature range: –40°C to +125°C
Applications
- Ultrasound
- Portable instrumentation
- Closed-loop servo-control/process control
- Data acquisition systems
- Programmable attenuation, digital gain, and offset adjustment
- Programmable voltage and current sources
Q & A
- What is the resolution of the DAC8568IBPW?
The DAC8568IBPW has a 16-bit resolution.
- What is the internal reference voltage of the DAC8568IBPW?
The internal reference voltage is 2.5V, which is disabled by default.
- What is the temperature drift of the internal reference?
The temperature drift of the internal reference is 2ppm/°C (typ) and 5ppm/°C (max).
- What is the glitch energy of the DAC8568IBPW?
The glitch energy is 0.1nV-s.
- What is the power supply range of the DAC8568IBPW?
The power supply range is +2.7V to +5.5V.
- What is the operating temperature range of the DAC8568IBPW?
The operating temperature range is –40°C to +125°C.
- What type of package does the DAC8568IBPW come in?
The DAC8568IBPW comes in a TSSOP-16 package.
- What is the maximum clock rate of the serial interface?
The serial interface can operate at clock rates up to 50MHz.
- How much power does the DAC8568IBPW consume?
The power consumption is typically 2.9mW at 3V, reducing to less than 1µW in power-down mode.
- What are some common applications of the DAC8568IBPW?
Common applications include ultrasound, portable instrumentation, closed-loop servo-control/process control, data acquisition systems, and programmable voltage and current sources.
