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 Voltage accuracy better than ±10mVBased on a true 16-bit: R-2R DAC with buffered rail-to-rail voltage outputNo. of output: four programmable voltage outputsEasily scalable in terms of DAC resolution: voltage range: number of channelsOutput current capability: 10mA (without BJT) and 75mA (with external BJT)
Applications
- Lab & field Instrumentation
- Power analyzer
- Programmable DC power supply
- Parametric measurement unit (PMU)
- Thermal imaging camera
Product Categories
- Data converters
End Equipment Reference Diagrams
Application Area
End Equipment
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