Overview
The DAC8531E/2K5, produced by Texas Instruments, is a low-power, single, 16-bit buffered voltage output Digital-to-Analog Converter (DAC). It features an on-chip precision output amplifier that allows for rail-to-rail output swing. This DAC is designed for applications requiring high accuracy and low power consumption, making it ideal for portable battery-operated equipment.
The device 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. It includes a power-on reset circuit that ensures the DAC output powers up at 0V and remains there until a valid write takes place. Additionally, it has a power-down feature that reduces current consumption to 200nA at 5V.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Power Supply | 2.7 | - | 5.5 | V |
| Current Consumption (Normal Operation) | - | 250 | - | µA |
| Current Consumption (Power-Down Mode) | - | 200 | - | nA |
| 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 | - | - |
Key Features
- MicroPower operation: 250µA at 5V
- Power-on reset to zero
- On-chip output buffer amplifier with rail-to-rail operation
- Low-power serial interface with Schmitt-triggered inputs
- SYNC interrupt facility
- Ensured monotonic by design
- Power-down feature reducing current consumption to 200nA at 5V
- Available in MSOP-8 and 3x3 SON-8 packages
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/2K5?
The DAC8531E/2K5 has a resolution of 16 bits.
- What is the power supply range for the DAC8531E/2K5?
The power supply range is from 2.7V to 5.5V.
- How much current does the DAC8531E/2K5 consume in normal operation?
The current consumption in normal operation is typically 250µA at 5V.
- What is the current consumption in power-down mode?
The current consumption in power-down mode is 200nA at 5V.
- What is the settling time of the DAC8531E/2K5?
The settling time is typically 10µs.
- What types of packages are available for the DAC8531E/2K5?
The DAC8531E/2K5 is available in MSOP-8 and 3x3 SON-8 packages.
- What is the operating temperature range of the DAC8531E/2K5?
The operating temperature range is from -40°C to 105°C.
- Is the DAC8531E/2K5 compatible with standard serial interfaces?
Yes, it is compatible with SPI, QSPI, Microwire, and most DSP interfaces.
- What is the purpose of the SYNC interrupt facility?
The SYNC interrupt facility allows the rising edge of SYNC to act as an interrupt and ignore the write sequence if SYNC is taken HIGH before the 24th clock cycle.
- How does the power-on reset feature work?
The power-on reset feature ensures that the DAC output powers up at 0V and remains there until a valid write takes place.
