16-Bit, 1MSPS Multiplexed Data Acquisition Reference Design
TIPD169
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Key Document
Description
This design is for a 16-bit 1MSPS single-ended, multiplexed data acquisition system (DAQ) for dc inputs. The system is composed of a 16-bit successive-approximation-register (SAR) analog-to-digital converter (ADC), SAR ADC driver, reference driver, and multiplexer. The design shows the process to optimize a single-ended DAQ to achieve fast settling at a sampling rate of 1MSPS.
Features
- 1/2 LSB settling in 390 ns
- Throughput of 1MSPS
- 4 V output step
- Measured Effective Resolution of 15.72 bits
- Measured ENOB of 13.57 bits
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Schematic/Block Diagram
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Test Data
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TI Devices (9)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| ADS8860 |
16-bit, 1-MSPS, 1-channel SAR ADC with single-ended input, SPI and daisy chain |
Analog-to-digital converters (ADCs) |
Sample & Buy |
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| OPA320 |
Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier
|
Operational amplifiers (op amps) |
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| OPA333 |
1.8-V, 17-µA, microPower, precision, zero-drift CMOS op amp |
Operational amplifiers (op amps) |
Sample & Buy |
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| OPA625 |
High Bandwidth, High Precision, Low Noise & Distortion Amplifier SAR ADC Driver with Power Scaling |
Operational amplifiers (op amps) |
Sample & Buy |
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| REF5045 |
4.5-V, 3-µVpp/V noise, 3-ppm/°C drift precision series voltage reference |
Voltage references |
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| SN74LV393A |
Dual 4-Bit Binary Counters |
Specialty logic ICs |
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| SN74LVC1G14 |
Single 1.65-V to 5.5-V inverter with Schmitt-Trigger inputs |
Buffer/driver |
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| THS4281 |
Very Low-Power High Speed Rail-To-Rail Input/Output Voltage Feedback Operational Amplifier |
Operational amplifiers (op amps) |
Sample & Buy |
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| TS5A3159 |
1-Ω on-state resistance, 5-V, 2:1 (SPDT), 1-channel analog switch |
Switches & multiplexers |
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CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 1255 |
04 Aug 2015
|
Design files (3)
| | PDF | 125 |
09 Sep 2015
|
| | PDF | 468 |
09 Sep 2015
|
| | ZIP | 636 |
09 Sep 2015
|
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