Reference Designs
Ultra-Low Noise Bias Voltage Reference Design for Microbolometer Detectors in Thermal Cameras
Texas Instruments
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
- No. of 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)
Applications
- Instrumentation (Lab, Analytical, Field)
- AC/DC Power Meter and Analyzers
- AC Sources, DC Power Supplies & Electronic Loads
- Memory and Semiconductor Test Equipment
- Thermal Imaging Camera
Product Categories
- Data Converters
End Equipment Reference Diagrams
Application Area
End Equipment
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