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AMC1303M0520
±50-mV input, precision current sensing reinforced isolated modulator with 20-MHz int clock
Data sheet
AMC1303M0520
- Pin-compatible family optimized for shunt-resistor-based current measurements:
- ±50-mV or ±250-mV input voltage ranges
- Manchester coded or uncoded bistream options
- 10-MHz and 20-MHz clock options
- Excellent DC performance:
- Offset error: ±50 µV or ±100 µV (max)
- Offset drift: ±1 µV/°C (max)
- Gain error: ±0.2% (max)
- Gain drift: ±40 ppm/°C (max)
- Transient immunity: 100 kV/µs (typ)
- System-level diagnostic features
- Safety-related certifications:
- 7000-VPK reinforced isolation per DIN VDE V 0884-11: 2017-01
- 5000-VRMS isolation for 1 minute per UL1577
- CAN/CSA no. 5A-component acceptance service notice and IEC 62368-1 end equipment standard
- Fully specified over the extended industrial temperature range: –40°C to +125°C
The AMC1303 (AMC1303x0510, AMC1303x0520, AMC1303x2510, and AMC1303x2520) is a family of precision, delta-sigma (ΔΣ) modulators with the output separated from the input circuitry by a capacitive double isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced isolation of up to 7000 VPK according to the DIN VDE V 0884-11 and UL1577 standards. Used in conjunction with isolated power supplies, this isolated modulator separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.
The input of the AMC1303 is optimized for direct connection to shunt resistors or other low voltage-level signal sources. The ±50-mV input voltage range option allows significant reduction of the power dissipation through the shunt. The output bit-stream of the AMC1303 is synchronized to the internally generated clock and is Manchester coded (AMC1303Ex) or uncoded (AMC1303Mx). By using an integrated digital filter (such as those in the TMS320F2807x or TMS320F2837x microcontroller families) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB at an effective output data rate of 78 kSPS.
The bitstream output of the Manchester coded AMC1303Ex versions supports single-wire data and clock transfer without having to consider the setup and hold time requirements of the receiving device.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | AMC1303x Small, High-Precision, Reinforced Isolated Delta-Sigma Modulators With Internal Clock datasheet (Rev. C) | PDF | HTML | 10 Feb 2020 |
| Application note | Shunt Resistor Selection for Isolated Data Converters | PDF | HTML | 04 May 2023 | |
| Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
| Certificate | UL Certificate of Compliance Vol4 Sec5 E181974 (Rev. A) | 23 Jan 2023 | ||
| Certificate | VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. R) | 12 Jul 2022 | ||
| Certificate | TUEV Technical Report No. 713203936 | 20 Oct 2021 | ||
| White paper | Comparing isolated amplifiers and isolated modulators (Rev. A) | 28 Feb 2019 |
Design & development
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Evaluation board
AMC1303EVM — AMC1303 small, high-precision, reinforced isolated modulator evaluation module
The AMC1303 devices are 1-bit modulators with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO2) isolation barrier. The isolation barrier provides galvanic isolation of up to 8000 VPEAK. When used in combination with an FPGA or other digital filter, AMC1303 (...)
User guide: PDF
Reference designs
TIDA-01349 — IPM Interface Reference Design for Inverters Using Single Package Six Channel Digital Isolator
This reference design realizes a three-phase inverter subsystem for AC inverter drives and servo drives using an intelligent power module (IPM). Reinforced isolation is present between the microcontroller (MCU) and the IPM-based power stage. The PWM signals are isolated using the single-package, (...)
| Package | Pins | Download |
|---|---|---|
| SOIC (DWV) | 8 | View options |
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