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AMC1305L25
±250-mV input, precision current sensing reinforced isolated modulator with LVDS interface
Data sheet
AMC1305L25
- Pin-compatible family optimized for shunt-resistor-based current measurements:
- ±50-mV or ±250-mV input voltage ranges
- CMOS or LVDS digital interface options
- Excellent DC performance supporting high-precision sensing on system level:
- Offset error: ±50 µV or ±150 µV (max)
- Offset drift: 1.3 µV/°C (max)
- Gain error: ±0.3% (max)
- Gain drift: ±40 ppm/°C (max)
- 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
- 7000-VPK reinforced isolation per
- Transient immunity: 15 kV/µs (min)
- High electromagnetic field immunity
(see application note SLLA181A) - External 5-MHz to 20-MHz clock input for
easier system-level synchronization - Fully specified over the extended industrial temperature range
The AMC1305 is a precision, delta-sigma (ΔΣ) modulator 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 VPEAK according to the DIN VDE V 0884-11, UL1577, and CSA standards. Used in conjunction with isolated power supplies, the device prevents noise currents on a high common-mode voltage line from entering the local system ground and interfering with or damaging low voltage circuitry.
The AMC1305 is optimized for direct connection to shunt resistors or other low voltage level signal sources and supports excellent dc and ac performance. Shunt resistors are typically used to sense currents in motor drives, green energy generation systems, or other industrial applications. By using an appropriate digital filter (that is, as integrated on the TMS320F2837x) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB (13.8 ENOB) at a data rate of 78 kSPS.
On the high-side, the modulator is supplied with a nominal voltage of 5 V (AVDD), whereas the isolated digital interface operates from a 3.3-V or 5-V power supply (DVDD).
The AMC1305 is available in a wide-body SOIC-16 (DW) package and is specified from –40°C to +125°C.
Technical documentation
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View all 11 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | AMC1305x High-Precision, Reinforced Isolated Delta-Sigma Modulators datasheet (Rev. G) | PDF | HTML | 07 Jan 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 | ||
| Application note | Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) | PDF | HTML | 28 Sep 2021 | |
| White paper | Comparing isolated amplifiers and isolated modulators (Rev. A) | 28 Feb 2019 | ||
| White paper | High Voltage Isolation Quality and Reliability for AMC130x | 21 Jun 2016 | ||
| Analog Design Journal | Analog Applications Journal 4Q 2014 | 24 Oct 2014 | ||
| Analog Design Journal | Isolated sensing systems with low power consumption | 24 Oct 2014 | ||
| EVM User's guide | AMC1305xxEVM User's Guide | 22 Sep 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
AMC1305L25EVM — AMC1305L25 Evaluation Module
The AMC1305L25 is an isolated single-channel delta-sigma (ΔΣ) modulator used in high-resolution measurement applications including current monitoring, industrial process control and motor positioning systems. The AMC1305L25EVM is a small form factor board containing all the necessary components to (...)
User guide: PDF
| Package | Pins | Download |
|---|---|---|
| SOIC (DW) | 16 | View options |
Ordering & quality
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