Overview
The DAC8501E/250G4, produced by Texas Instruments, is a low-power, single, 16-bit buffered voltage output Digital-to-Analog Converter (DAC) optimized for multiplying operation. It features an on-chip precision output amplifier that allows for rail-to-rail output swing. The DAC uses a versatile 3-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 until a valid write is performed. It is particularly suited for portable battery-operated equipment due to its low power consumption, with a normal operation current of 250µA at 5V and a power-down mode current of 200nA at 5V.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 16 bits | |
| Power Supply | +2.7V to +5.5V | |
| Current Consumption (Normal Mode) | 250µA at 5V, 240µA at 2.7V | VDD = +2.7V to +5.5V |
| Current Consumption (Power-Down Mode) | 200nA at 5V, 50nA at 2.7V | VDD = +2.7V to +5.5V |
| Settling Time | 10µs to ±0.003% FSR | |
| Multiplying Mode Bandwidth | 350kHz (small-signal), 64kHz (full-power) | |
| Output Amplifier Slew Rate | 1V/µs | |
| Operating Temperature Range | –40°C to +105°C | |
| Package | MSOP-8 |
Key Features
- Micro-power operation: 250µA at 5V
- Multiplying-mode bandwidth: 350kHz
- 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
- MSOP-8 package
Applications
- Process control
- Data acquisition systems
- Closed-loop servo-control
- PC peripherals
- Portable instrumentation
- Programmable attenuation
Q & A
- What is the resolution of the DAC8501E/250G4?
The DAC8501E/250G4 has a resolution of 16 bits.
- What is the power supply range for the DAC8501E/250G4?
The power supply range is +2.7V to +5.5V.
- How much current does the DAC8501E/250G4 consume in normal operation?
The current consumption is 250µA at 5V and 240µA at 2.7V.
- What is the current consumption in power-down mode?
The current consumption in power-down mode is 200nA at 5V and 50nA at 2.7V.
- What is the settling time of the DAC8501E/250G4?
The settling time is 10µs to ±0.003% FSR.
- What is the multiplying mode bandwidth of the DAC8501E/250G4?
The multiplying mode bandwidth is 350kHz for small-signal and 64kHz for full-power.
- What is the slew rate of the output amplifier?
The slew rate of the output amplifier is 1V/µs.
- What is the operating temperature range of the DAC8501E/250G4?
The operating temperature range is –40°C to +105°C.
- In what package is the DAC8501E/250G4 available?
The DAC8501E/250G4 is available in an MSOP-8 package.
- What types of interfaces does the DAC8501E/250G4 support?
The DAC8501E/250G4 supports SPI, QSPI, Microwire, and Digital Signal Processor (DSP) interfaces.
- Does the DAC8501E/250G4 have a power-on reset feature?
Yes, the DAC8501E/250G4 has a power-on reset circuit that ensures the DAC output powers up at 0V.
