Uncooled microbolometer detectors require accurate and ultra-low noise bias voltages for their operation. Such requirements cannot be simply met by switching power supplies, LDO or DAC outputs. Enabled by Texas Instruments’ precision DAC, low noise precision amplifier and high PSRR, low noise LDO, this reference design demonstrates how to generate accurate and ultra-low noise programmable bias voltages and power supplies for uncooled microbolometer detectors at low cost.
Features
Total output noise < 4µVRMS from 0.1Hz to 1MHz
Voltage accuracy better than ±10mV
Based on a true 16-bit, R-2R DAC with buffered rail-to-rail voltage output
Four programmable voltage outputs
Easily scalable in terms of DAC resolution, voltage range, number of channels
Output current capability: 10mA (without BJT) and 75mA (with external BJT)
| Manufacturer | Texas Instruments |
|---|---|
| Category | Other Solutions |
| Eval Board |
Board not Stocked
|
| Purpose |
Ultra-Low-Noise Programmable Bias and Power Supply
|
| Design Author |
Texas Instruments
|
| Application / Target Market |
LCD and OLED Bias Supplies
Power: Auxiliary Power Supply Test and Measurement Equipment |
| Main I.C. Base Part |
DAC80508
OPA2192 TPS717 |
| Date Created By Author | 2018-02 |
| Date Added To Library | 2018-07 |
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