74-dB SNR, 10-MSPS, 14-Bit, Analog Front-End Reference Design for Thermal Imaging Cameras
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Key Document


This reference design is built keeping an electronic imaging system in mind. Image sensors today force heavy demands on ADCs in terms of: excellent linearity (DNL < 0.5 LSB and INL < 4 LSB), high resolution (12- to 18-bit), high speed (up to 20 MSPS), and high SNR (> 74-dB SNR) to assure superior image quality and freedom from distortion over time. Enabled by the low-noise, high-speed amplifier, fully differential amplifier (FDA), high-speed ADC, and low-noise LDO from TI, this reference design demonstrates how to design a high-performance analog signal chain for digitizing the pixel-output signal in thermal imaging cameras.

  • SNR, ENOB and THD: > 74 dB, 12-bit and < -84 dB
  • Sampling speed: front-end circuit optimized for 10MSPS or lesser
  • Analog input type: single-ended unipolar signal
  • Integral Non-Linearity (INL) < 1 LSB (typical) and Differential Non-Linearity (DNL) < 0.5 LSB (typical)
  • Output data interface: 1.8V parallel CMOS or DDR LVDS
  • Overall power consumption: < 80 mW

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS4142  14-bit, 65 MSPS, Analog-to-Digital Converter (ADC)  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
OPA2626  High-Bandwidth, High-Precision, Low THD+N, 16-Bit and 18-Bit ADC Drivers  Operational amplifiers (op amps)  Sample & Buy Not Available
THS4551  Low Noise, Precision, 150MHz, Fully Differential Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS717  150-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS4142 Download Download
OPA2626 Download Download
THS4551 Download
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TPS717 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 4103 26 Jul 2017
Design files (6)
Title Type Size (KB) Date
ZIP 168 26 Jul 2018
ZIP 5991 26 Jul 2018
PDF 1324 26 Jul 2018
PDF 246 26 Jul 2018
PDF 67 26 Jul 2018
PDF 429 26 Jul 2018

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