AMC1305L25

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Reinforced Isolated Modulator With ±250mV Input and LVDS Interface

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Product details

Parameters

Input range (Vp-p) 250mV Interface type LVDS Sample rate (Max) (MSPS) 20 Rating Catalog Isolation (kV peak) 7 CMTI (Min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 85 Operating temperature range (C) -40 to 125 INL (Max) (+/-LSB) 4 Power consumption (Typ) (mW) 49.3 open-in-new Find other Isolated ADCs

Package | Pins | Size

SOIC (DW) 16 77 mm² 10.3 x 7.5 open-in-new Find other Isolated ADCs

Features

  • 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
  • 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
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Description

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.

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Technical documentation

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Type Title Date
* Data sheet AMC1305x High-Precision, Reinforced Isolated Delta-Sigma Modulators datasheet (Rev. G) Jan. 07, 2020
White paper Comparing isolated amplifiers and isolated modulators (Rev. A) Feb. 28, 2019
Certificate Nonoptical Isolating Devices UL 1577 Certificate of Compliance (Rev. B) Nov. 26, 2018
Application note Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Application note Integrated, Current Sensing Analog-to-Digital Converter Dec. 21, 2016
White paper High Voltage Isolation Quality and Reliability for AMC130x Jun. 21, 2016
Technical article Get cerTIfied, not certi-FRIED! Electromagnetic compatibility testing explained (Part 4) Feb. 06, 2015
Technical article Using delta-sigma modulators for isolated high-voltage measurements Jan. 09, 2015
Technical article Part III: Get CerTIfied, not certi-FRIED! Electromagnetic compatibility testing explained Dec. 02, 2014
Application note Analog Applications Journal 4Q 2014 Oct. 24, 2014
Application note Isolated sensing systems with low power consumption Oct. 24, 2014
User guide AMC1305xxEVM User's Guide Sep. 22, 2014

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

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 (...)

Features
  • 2mm, 2-terminal screw connectors to provide easy access to the analog inputs of the modulator
  • 2mm, 2-terminal screw connectors to provide easy access to the modulator digital output (DATA) and modulator clock input (CLKIN)
  • Optional isolated power to the AMC1305L25 analog voltage supply input derived (...)

Design tools & simulation

SIMULATION MODEL Download
SLAM225A.ZIP (15 KB) - IBIS Model
CALCULATION TOOL Download
SBAR010.ZIP (3354 KB)

CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options

Ordering & quality

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