20-bit 1MSPS DAQ Reference Design Optimizing Power Supply Efficiency While Minimizing EMI

(ACTIVE) TIDA-01056

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Key Document

Description

This reference design for high performance data acquisition (DAQ) systems optimizes power stage in order to reduce power consumption and minimize the effect of EMI from switching regulator by using LMS3635-Q1 buck converter.  This reference designs yields 7.2% efficiency improvement at most light load current compared to LM53635 buck converter, which achieves 125.25dB SFDR, 99dB SNR and 16.1ENOB.

Features
  • Power design minimizing DC to DC EMI impact on system performance
  • Two 20-bit SAR ADC channels
  • Modular front-end reference design for high channel count systems that can be repeated
  • Up to +/- 4V input signal (8Vpp differential)

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Design Files

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TI Devices (20)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8900B  20-Bit, 1-MSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
LM46001  3.5 to 60V, 1A Synchronous Step-Down Voltage Converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM5574  75V, 0.5A Step-Down Switching Regulator  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM7705  Low Noise Negative Bias Generator  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
LMK00804B  Low Skew, 1-to-4 Multiplexed Differential/LVCMOS-to-LVCMOS/TTL Fanout Buffer  Clock buffers  Sample & Buy View Design Kits & Evaluation Modules
LMK61E2  Ultra-Low Jitter Fully Programmable Oscillator, Integrated EEPROM, +/-50ppm  Clock & timing  Sample & Buy View Design Kits & Evaluation Modules
LMS3635-Q1  3.5A /5.5A, 36V Synchronous, 400kHz, Step-Down Converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LMZ14201  SIMPLE SWITCHER® 6V to 42V, 1A Power Module in Leaded Surface Mount TO Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LMZ14202  SIMPLE SWITCHER® 6V to 42V, 2A Power Module in Leaded SMT-TO Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LMZ14203  SIMPLE SWITCHER® 6V to 42V, 3A Power Module in Leaded Surface Mount TO Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
OPA376  Precision, Low Noise, Low Iq Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA625  High Bandwidth, High Precision, Low Noise & Distortion Amplifier SAR ADC Driver with Power Scaling  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA827  Low-Noise, High-Precision, JFET-Input Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF5040  Low Noise, Very Low Drift, Precision Series Voltage Reference  Voltage references  Sample & Buy Not Available
REF6041  5ppm/C High-Precision Voltage Reference with Integrated High-Bandwidth Buffer  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
SN74AHC1G04  Single Inverter Gate  Buffer/driver  Sample & Buy Not Available
SN74AUP1G80  Low-Power Single Postitive-Edge-Triggered D-Type Flip-Flop  Flip-flop/latch/register  Sample & Buy View Design Kits & Evaluation Modules
THS4551  Low Noise, Precision, 150MHz, Fully Differential Amplifier  Special function amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS7A3001-EP  Enhanced Product Negative Vin, -200mA, Ultra-Low-Noise, High-PSRR, Low-Dropout Linear Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A47  36-V, 1-A, 4.17-μVRMS, RF low-dropout (LDO) voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS8900B Download
LM46001 Download Download
LM5574 Download Download
LM7705 Download Download
LMK00804B Download
LMK61E2 Download Download
LMS3635-Q1 Download Download
LMZ14201 Download Download
LMZ14202 Download Download
LMZ14203 Download Download
OPA376 Download Download
Download Download
Download Download
OPA625 Download Download
OPA827 Download Download
Download Download
REF5040 Download Download
Download Download
REF6041 Download Download
SN74AHC1G04 Download Download
Download Download
Download Download
SN74AUP1G80 Download Download
Download Download
Download
Download -
Download Download
Download Download
Download -
THS4551 Download
Download -
Download Download
TPS7A3001-EP Download Download
TPS7A47 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date
PDF 1635 27 Dec 2017
Design files (6)
Title Abstract Type Size (KB) Date
ZIP 1603 20 Dec 2017
ZIP 2609 20 Dec 2017
PDF 3442 20 Dec 2017
PDF 810 20 Dec 2017
PDF 124 20 Dec 2017
PDF 900 20 Dec 2017
Related Tools & Software

Reference Designs  ( 10 )


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