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AMC3306M25

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±250-mV input, precision reinforced isolated modulator with integrated DC/DC converter

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Product details

Parameters

Input range (Vp-p) 250mV Interface type Serial CMOS Sample rate (Max) (MSPS) 21 Rating Catalog Isolation (kV peak) 6 CMTI (Min) (kV/µs) 75 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 81 Operating temperature range (C) -40 to 125 INL (Max) (+/-LSB) 4 Power consumption (Typ) (mW) 85.8 open-in-new Find other Isolated ADCs

Package | Pins | Size

SO-MOD (DWE) 16 106 mm² 10.3 x 10.3 open-in-new Find other Isolated ADCs

Features

  • 3.3-V or 5-V single supply with integrated DC/DC converter
  • ±250-mV input voltage range optimized for current measurement using shunt resistors
  • Low DC errors:
    • Offset error: ±50 µV (max)
    • Offset drift: ±1 µV/°C (max)
    • Gain error: ±0.2% (max)
    • Gain drift: ±35 ppm/°C (max)
  • High CMTI: 75 kV/µs (min)
  • System-level diagnostic features
  • Safety-related certifications:
    • 6000-VPEAK reinforced isolation per DIN VDE V 0884-11
    • 4250-VRMS isolation for 1 minute per UL1577
  • Meets CISPR-11 and CISPR-25 EMI standards

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Description

The AMC3306M25 is a precision, delta-sigma (ΔΣ) modulator, optimized for shunt-based current measurements, with a fully integrated isolated DC/DC converter that allows single-supply operation from the low-side of the device. The reinforced capacitive isolation barrier is certified according to VDE V 0884-11 and UL1577. This isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.

The input of the AMC3306M25 is optimized for direct connection to shunt resistors or other, low voltage-level signal sources. The integrated isolated DC/DC converter allows unconstrained placement of the shunt, independent of any high-side supply that is usually required to power the isolated modulator, and makes the device a unique solution for space-constrained applications.

The device supports excellent AC and DC performance over its linear input voltage range of ±250 mV. By using a digital filter or delta-sigma-filter module (such as those integrated 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 a data rate of 78 kSPS.

The AMC3306M25 is fully specified over the extended industrial temperature range of –40°C to +125°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet AMC3306M25 High-Precision, Reinforced Isolated Delta-Sigma Modulator datasheet (Rev. A) Sep. 25, 2020
Technical articles Simplify your isolated current and voltage sensing designs with single-supply isolated amplifiers and ADCs Oct. 26, 2020
User guide AMC3306 Evaluation Module User's Guide Mar. 02, 2020
Technical articles Isolation 101: How to find the right isolation solution for your application Feb. 11, 2020
Technical articles Chief Technology Officer Ahmad Bahai discusses isolation in a world of collaboration Oct. 02, 2018
Technical articles Why capacitive isolation: a vital building block for sensors in smart cities Jan. 16, 2018

Design & development

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Hardware development

EVALUATION BOARD Download
49
Description

The AMC3306 evaluation module (EVM) is a platform for evaluating the AMC3306 product, a precision isolated amplifier with an integrated DC/DC converter that powers the high side of the amplifier. AMC3306 is a 7-kV reinforced isolation modulator designed for use in current shunt measuring (...)

Features
  • Integrated DC/DC converter for high-side power
  • Reinforced isolation modulator: 7-kV peak, 10-kV surge
  • ±250-mV input range
  • Delta-sigma modulator with 16 bits of resolution

Design tools & simulation

SIMULATION MODEL Download
SBAM443.ZIP (24 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
CALCULATION TOOL Download
SBAR010.ZIP (3354 KB)

CAD/CAE symbols

Package Pins Download
SOIC (DWE) 16 View options

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