Overview
The DAC8531E/250 is a low-power, single, 16-bit buffered voltage output Digital-to-Analog Converter (DAC) produced by Texas Instruments. It features an on-chip precision output amplifier that allows for rail-to-rail output swing, making it suitable for a variety of applications requiring high accuracy and low power consumption.
This DAC uses a versatile three-wire serial interface compatible with standard SPI, QSPI, Microwire, and Digital Signal Processor (DSP) interfaces, operating at clock rates up to 30MHz. The device requires an external reference voltage to set the output range and includes a power-on reset circuit that ensures the DAC output powers up at 0V.
The DAC8531E/250 is particularly suited for portable battery-operated equipment due to its low power consumption, with a typical current consumption of 250µA at 5V and reducing to 1µW in power-down mode.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 16 bits | |||
| Power Supply | 2.7 | 5.5 | V | |
| Current Consumption (Normal Mode) | 240 | 250 | 400 | µA |
| Current Consumption (Power-Down Mode) | 0.05 | 1 | µA | |
| Settling Time | 10 | µs | ||
| Output Impedance | 1 | Ω | ||
| Reference Input Range | 0 | VDD | V | |
| Reference Input Impedance | 150 | kΩ | ||
| Operating Temperature Range | -40 | 105 | °C | |
| Package Types | MSOP-8, 3x3 SON-8 (same size as QFN) | |||
Key Features
- MicroPower operation: 250µA at 5V
- Power-on reset to zero
- Ensured monotonic by design
- Low-power serial interface with Schmitt-triggered inputs
- On-chip output buffer amplifier with rail-to-rail operation
- SYNC interrupt facility
- Power-down feature reducing current consumption to 200nA at 5V
- Three-wire serial interface compatible with SPI, QSPI, Microwire, and DSP interfaces
Applications
- Process control
- Data acquisition systems
- Closed-loop servo-control
- PC peripherals
- Portable instrumentation
- Programmable attenuation
Q & A
- What is the resolution of the DAC8531E/250?
The DAC8531E/250 has a resolution of 16 bits.
- What is the typical current consumption of the DAC8531E/250 in normal mode?
The typical current consumption is 250µA at 5V.
- What are the power-down modes available in the DAC8531E/250?
The DAC8531E/250 supports four separate modes of operation, including normal mode and three power-down modes where the output is connected internally to GND through a 1kΩ resistor, a 100kΩ resistor, or left open-circuited (High-Z).
- What is the settling time of the DAC8531E/250?
The settling time is typically 10µs to ±0.003 FSR.
- What are the compatible serial interfaces for the DAC8531E/250?
The DAC8531E/250 is compatible with SPI, QSPI, Microwire, and most DSP interfaces.
- What is the operating temperature range of the DAC8531E/250?
The operating temperature range is from -40°C to +105°C.
- What are the package types available for the DAC8531E/250?
The DAC8531E/250 is available in MSOP-8 and 3x3 SON-8 (same size as QFN) packages.
- How does the power-on reset feature work in the DAC8531E/250?
The power-on reset circuit ensures that the DAC output powers up at 0V and remains there until a valid write takes place to the device.
- What is the output impedance of the DAC8531E/250?
The output impedance is typically 1Ω.
- Can the DAC8531E/250 be used in bipolar output configurations?
Yes, the DAC8531E/250 can be used in bipolar output configurations using specific circuitry as described in the datasheet.
