Overview
The DAC8565IBPWR, produced by Texas Instruments, is a 16-bit, quad-channel, ultra-low glitch, voltage output digital-to-analog converter (DAC). This device is designed for low-power, high-precision applications and features an internal 2.5V reference with high accuracy and stability. The DAC8565 is monotonic over the entire temperature range, ensuring good linearity and minimizing code-to-code transient voltages (glitch). It operates with a versatile 3-wire serial interface compatible with standard SPI, QSPI, Microwire, and DSP interfaces, supporting clock rates up to 50MHz.
The device includes a power-on-reset circuit that ensures the DAC output powers up at either zero-scale or midscale until a valid code is written. It also features a power-down mode that reduces current consumption significantly, making it ideal for portable, battery-operated equipment.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Relative Accuracy | ±4 | - | ±12 | LSB |
| Differential Nonlinearity | ±0.5 | - | ±1 | LSB |
| Offset Error | ±5 | - | ±8 | mV |
| Full-Scale Error | ±0.2 | - | ±0.5 | % of FSR |
| Gain Error | ±0.05 | - | ±0.2 | % of FSR |
| Internal Reference Voltage | 2.4975 | 2.5 | 2.5025 | V |
| Internal Reference Temperature Drift | 2 | 2ppm/°C | 5ppm/°C | ppm/°C |
| Power Supply Range | 2.7 | - | 5.5 | V |
| Operating Temperature Range | -40 | - | 105 | °C |
| Settling Time | - | 10μs | - | μs |
| Power Consumption (Active) | - | 1mA @ 5V | - | mA |
| Power Consumption (Power-Down) | - | 1.3μA @ 5V | - | μA |
Key Features
- Ultra-low glitch energy of 0.15nV-s, ensuring minimal code-to-code transient voltages.
- Internal 2.5V reference with 0.004% initial accuracy and 2ppm/°C temperature drift.
- Monotonic over the entire temperature range, providing good linearity.
- Power-on-reset circuit that ensures the DAC output powers up at either zero-scale or midscale.
- Power-down feature reducing current consumption to 1.3μA at 5V.
- Wide power supply range of +2.7V to +5.5V.
- Low-power serial interface with Schmitt-triggered inputs, supporting clock rates up to 50MHz.
- On-chip output buffer amplifier with rail-to-rail operation.
- 1.8V to 5.5V logic compatibility.
- Asynchronous clear to zero-scale or midscale.
Applications
- Portable Instrumentation
- Closed-Loop Servo-Control
- Process Control, PLCs
- Data Acquisition Systems
- Programmable Attenuation
- PC Peripherals
Q & A
- What is the resolution of the DAC8565?
The DAC8565 has a resolution of 16 bits.
- What is the glitch energy of the DAC8565?
The glitch energy of the DAC8565 is 0.15nV-s.
- What is the internal reference voltage of the DAC8565?
The internal reference voltage is 2.5V with an initial accuracy of 0.004% and a temperature drift of 2ppm/°C.
- What is the power supply range of the DAC8565?
The power supply range is +2.7V to +5.5V.
- What is the operating temperature range of the DAC8565?
The operating temperature range is –40°C to +105°C.
- How does the power-on-reset feature work?
The power-on-reset circuit ensures the DAC output powers up at either zero-scale or midscale until a valid code is written to the device.
- What is the current consumption in power-down mode?
The current consumption in power-down mode is 1.3μA at 5V.
- What interfaces does the DAC8565 support?
The DAC8565 supports standard SPI, QSPI, Microwire, and DSP interfaces.
- What is the maximum clock rate for the serial interface?
The maximum clock rate for the serial interface is 50MHz.
- What are some typical applications of the DAC8565?
Typical applications include portable instrumentation, closed-loop servo-control, process control, data acquisition systems, programmable attenuation, and PC peripherals.
