Overview
The DAC81408RHAR is a high-performance, 8-channel digital-to-analog converter (DAC) produced by Texas Instruments. It is part of the DACx1408 family, which includes 16-bit, 14-bit, and 12-bit resolution variants. This device is characterized by its high-voltage output capabilities, integrated internal reference, and robust performance specifications. The DAC81408RHAR is designed to meet the demands of various industrial and measurement applications, offering a wide range of output voltage configurations and high linearity.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 Bits | |
| Integral Nonlinearity (INL) | ±1 LSB (Maximum) | |
| Total Unadjusted Error (TUE) | ±0.1% of FSR (Maximum) | |
| Internal Reference Voltage | 2.5 V | |
| Output Voltage Range | ±2.5 V, ±5 V, ±10 V, ±20 V, 0 to 5 V, 0 to 10 V, 0 to 20 V, 0 to 40 V | |
| Output Current Capability | ±25 mA | |
| Operating Temperature Range | -40°C to +125°C | |
| Package Type | VQFN (RHA) with 40 pins | |
| Package Size | 6 mm × 6 mm | |
| Serial Interface | 50-MHz SPI Compatible, 4-Wire Mode, 1.7 V to 5.5 V Operation |
Key Features
- High Linearity and Accuracy: Specified monotonic at 16-bit resolution with INL of ±1 LSB and TUE of ±0.1% of FSR.
- Integrated Internal Reference: A low drift, 2.5-V precision internal reference eliminates the need for an external precision reference.
- Flexible Output Configuration: User-selectable output configuration for full-scale bipolar and unipolar output voltages.
- High Drive Capability: Integrated DAC output buffers can sink or source up to 25 mA, reducing the need for additional operational amplifiers.
- Differential Output Mode: Each pair of channels can be configured to provide a differential output with offset calibration.
- Dither Signal Generation: Three dedicated A-B toggle pins enable dither signal generation with up to three possible frequencies.
- Analog Temperature Output: Analog temperature output with a sensor gain of –4 mV/°C.
- Serial Interface: 50-MHz SPI compatible serial interface supporting operation from 1.7 V to 5.5 V.
- Power-On Reset: The device incorporates a power-on-reset circuit that connects the DAC outputs to ground at power-up.
Applications
- Industrial Automation: Suitable for control systems, process control, and automation.
- Test and Measurement: Ideal for precision measurement instruments and test equipment.
- Medical Devices: Can be used in medical equipment requiring high precision and reliability.
- Aerospace and Defense: Applicable in various aerospace and defense systems requiring high-performance DACs.
Q & A
- What is the resolution of the DAC81408RHAR?
The DAC81408RHAR has a resolution of 16 bits.
- What is the operating temperature range of the DAC81408RHAR?
The operating temperature range is -40°C to +125°C.
- What types of output voltage configurations are supported by the DAC81408RHAR?
The device supports both bipolar (±2.5 V, ±5 V, ±10 V, ±20 V) and unipolar (0 to 5 V, 0 to 10 V, 0 to 20 V, 0 to 40 V) output voltage configurations.
- Does the DAC81408RHAR have an integrated internal reference?
Yes, it includes a low drift, 2.5-V precision internal reference.
- What is the maximum output current capability of the DAC81408RHAR?
The integrated DAC output buffers can sink or source up to 25 mA.
- What type of serial interface does the DAC81408RHAR use?
The device uses a 50-MHz SPI compatible serial interface with 4-wire mode, operating from 1.7 V to 5.5 V.
- Does the DAC81408RHAR support differential output mode?
Yes, each pair of channels can be configured to provide a differential output with offset calibration.
- How does the power-on-reset circuit function in the DAC81408RHAR?
The power-on-reset circuit connects the DAC outputs to ground at power-up, and the outputs remain in this state until the device registers are properly configured for operation.
- What is the package type and size of the DAC81408RHAR?
The device is packaged in a VQFN (RHA) package with 40 pins, measuring 6 mm × 6 mm.
- Does the DAC81408RHAR have any temperature sensing capabilities?
Yes, it includes an analog temperature output with a sensor gain of –4 mV/°C.
