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Texas Instruments ADS4142 | Demoboard TIDA-01403

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

Overview

TopologyOther Topology
IC revisionE1

Description

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.

Features

  • 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

Typical applications

  • Thermal Imaging Camera

Products

Order Code Data­sheet Downloads Product seriesλDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
CTol. CVR
(V (DC))
SizeCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
Technical ReferenceZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
Type Samples
150060RS75000
STE ALT EAG LTS PSP CAD IGSWL-SMCW SMT Mono-color Chip LED Waterclear 625 Red 630 250 2 AlInGaP 140 0603 1.6 0.8 0.7
742792097
STE ALT EAG CAD LTS PSP IGS CADWE-CBF SMT EMI Suppression Ferrite Bead 0805 2 1.2 0.9 0.5 1500 1800 70 MHz 1000 0.3 High Current
885012005043
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 25 V(DC)33 pF ±5% 25 0402 NP0 Class I 1 0.5 0.5 NP00402330J025DFCT10000
Order Code Data­sheet
150060RS75000
742792097
885012005043
Samples
Order Code Data­sheet Downloads Product seriesλDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
CTol. CVR
(V (DC))
SizeCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
Technical ReferenceZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
Type Samples