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


Design files


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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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDA7.PDF (4103 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRWT5.ZIP (5991 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRWT4.PDF (1324 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Fully differential amplifiers

THS4551Low Noise, Precision, 150MHz, Fully Differential Amplifier

Data sheet: PDF | HTML
High-speed ADCs (≥10 MSPS)

ADS414214-bit, 65 MSPS, Analog-to-Digital Converter (ADC)

Data sheet: PDF | HTML
High-speed op amps (GBW ≥ 50 MHz)

OPA2626High-Bandwidth, High-Precision, Low THD+N, 16-Bit and 18-Bit ADC Drivers

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS717150-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 74-dB SNR, 10-MSPS, 14-Bit, Analog Front-End Reference Design for Thermal Imagin Jul. 26, 2017

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