8-ch Isolated High Voltage Analog Input Module with ISOW7841 Reference Design
TIDA-01333
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Key Document
Description
The TIDA-01333 isolated high voltage analog input module reference design has eight channels supporting both, voltage and current measurement. In addition, 4 channels support common-mode voltages up to ±160V. Isolation of +5V line and the Serial Peripheral Interface (SPI) communication is done in a single chip using the ISOW7841. The design uses ADS8681 which is a 16-bit analog to digital converter (ADC) that can handle input voltages up to ±12.288V. This makes unnecessary any preprocessing of standard input voltages in the industrial space.
Features
- Isolated 5V supply + isolated SPI in one chip
- Switching between voltage and current measurement for every channel
- 4 channels with common-mode voltage of up to ±160V
- 100MOhm input impedance
- BeagleBone compatible
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Schematic/Block Diagram
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Design Guide
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TI Devices (12)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| ADS8681 |
16-Bit, 1-MSPS, 1-Ch SAR ADC with programmable (±12/±10/±6/±5/±2.5V) input ranges on +5V supply |
Analog-to-digital converters (ADCs) |
Sample & Buy |
View Design Kits & Evaluation Modules |
| INA149 |
High Common Mode Voltage Difference Amplifier |
Amplifiers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| ISO7140CC |
Quad-channel, 4/0, 50-Mbps digital isolator |
Isolation |
Sample & Buy |
View Design Kits & Evaluation Modules |
| ISOW7841 |
Quad-channel, 3/1, reinforced digital isolator with integrated power |
Power for signal isolators |
Sample & Buy |
View Design Kits & Evaluation Modules |
| MUX36S08 |
1-pA on-state leakage current, 36-V, 8:1, 1-channel precision analog multiplexer |
Switches & multiplexers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| OPA192 |
High-Voltage, Rail-to-Rail Input/Output, 5µV, 0.2µV/˚C, Precision Operational Amplifier |
Operational amplifiers (op amps) |
Sample & Buy |
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| SN74AHC594 |
8-Bit Shift Registers With Output Registers |
Flip-flop/latch/register |
Sample & Buy |
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| SN74LV1T125 |
Single Power Supply, Single BUFFER GATE w/ 3-State Output (active low enable) |
Voltage level translators |
Sample & Buy |
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| SN74LVC1G332 |
Single 3-input, 1.65-V to 5.5-V OR gate |
Gate |
Sample & Buy |
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| SN74LVC2G86 |
2-ch, 2-input, 1.65-V to 5.5-V XOR (exclusive OR) gates |
Gate |
Sample & Buy |
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| TPS55010 |
2.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS |
Offline & isolated DC/DC controllers & converters |
Sample & Buy |
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| TS5A23157 |
5-V, 2:1 (SPDT), 2-channel analog switch |
Switches & multiplexers |
Sample & Buy |
View Design Kits & Evaluation Modules |
CAD/CAE symbols
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 1406 |
24 Feb 2017
|
White paper (1)
| Title | Type | Size (KB) | Date |
| | PDF | 3648 |
07 Jul 2017
|
Design files (6)
| | ZIP | 623 |
22 Mar 2017
|
| | ZIP | 2244 |
22 Mar 2017
|
| | PDF | 3833 |
22 Mar 2017
|
| | PDF | 712 |
22 Mar 2017
|
| | PDF | 77 |
22 Mar 2017
|
| | PDF | 1459 |
22 Mar 2017
|
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