Reference design for microbolometer detectors in thermal cameras

4th September 2018
Posted By : Lanna Cooper
Reference design for microbolometer detectors in thermal cameras

 

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 less than 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)

For more information, click here.


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Sensor+Test 2019
25th June 2019
Germany Nürnberg Messe
DSEI 2019
10th September 2019
United Kingdom EXCEL, London
European Microwave Week 2019
29th September 2019
France Porte De Versailles Paris
Engineering Design Show 2019
16th October 2019
United Kingdom Ricoh Arena, Coventry
ELIV 2019
16th October 2019
Germany Bonn World Conference Center