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TIPD117
Dual-channel data acquisition reference design for optical encoders, 12 bits, 1 MSPS
TIPD117
Overview
This TI Precision Verified Design provides the theory, component selection, simulation, PCB design, and measurement details for a 12-bit 1-MSPS single supply dual channel simultaneous data acquisition system. This circuit achieves 73 dB SINAD for a 4.5 V differential signal at 2 KHz input frequency. Differential input may have a wide range of common mode voltage. Circuit includes a low impedence buffer, low pass RC filter and 12 bit, Dual, Simultaneous Sampling SAR ADC with internal reference voltage source.
Features
- 12-Bit, 2-Channel, Simultaneous Data Acquisition at 1-MSPS Throughput
- 72dB SNR, 85dB THD, 71.5dB SINAD AC Performance
- ±4.5 V Differential Input Voltage Signal
- Alternate component choices with measured results shown for 16-bit and 14-bit performance upgrade
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.
SLAC587.ZIP (472 K)
Detailed schematic diagram for design layout and components
TIDR274.PDF (71 K)
Detailed schematic diagram for design layout and components
TIDR275.PDF (57 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDC009.ZIP (306 K)
Design file that contains information on physical board layer of design PCB
Products
Includes TI products in the design and potential alternatives.
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Technical documentation
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View all 3
| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | TIPD117 Verified Design Reference Guide | Jun. 06, 2013 | |
| Technical article | Designing an EMC-compliant interface to motor position encoders – Part 5 | PDF | HTML | Nov. 10, 2015 | |
| Analog Design Journal | Closed-loop motor control: An introduction to rotary resolvers and encoders | Apr. 11, 2014 |
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