Automotive ±1-V input, precision reinforced isolated modulator with integrated DC/DC converter


Product details


Input range (Vp-p) ±1V Interface type Serial CMOS Sample rate (Max) (MSPS) 21 Rating Automotive Isolation (kV peak) 6 CMTI (Min) (kV/µs) 90 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 84 Operating temperature range (C) -40 to 85 INL (Max) (+/-LSB) 4 Power consumption (Typ) (mW) 94.05 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


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • 3.3-V or 5-V single supply with integrated DC/DC converter
  • ±1-V input voltage range optimized for voltage measurements
  • Input resistance: 1 GΩ (typ)
  • Low DC errors:
    • Offset error: ±0.3 mV (max)
    • Offset drift: ±4 µV/°C (max)
    • Gain error: ±0.2% (max)
    • Gain drift: ±40 ppm/°C (max)
  • High CMTI: 90 kV/µs (min)
  • System-level diagnostic features
  • Low EMI: meets CISPR-11 and CISPR-25 standards
  • Safety-related certifications:
    • 6000-VPEAK reinforced isolation per DIN VDE V 0884-11
    • 4250-VRMS isolation for 1 minute per UL1577

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The AMC3336-Q1 is a precision, isolated delta-sigma (ΔΣ) modulator, optimized for high-impedance AC voltage measurements. The fully integrated, isolated DC/DC converter allows single-supply operation from the low-side of the device, which makes the device a unique solution for space-constrained applications. The reinforced capacitive isolation barrier is certified according to VDE V 0884-11 and UL1577 and supports a working voltage of up to 1.2 kVRMS.

The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from hazardous voltages and damage.

The input of the AMC3336-Q1 is optimized for direct connection to a resistor network or other, high-impedance voltage-signal source. The excellent DC accuracy and low temperature drift support accurate voltage measurments over the extended industial temperature range from –40°C to +125°C.

By using a digital filter (such as a sinc3 filter) 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.

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Technical documentation

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Type Title Date
* Data sheet AMC3336-Q1 High-Precision, ±1-V Input, Reinforced Isolated Delta-Sigma Modulator With Integrated DC/DC Converter datasheet Apr. 26, 2021
Application note Best Practices to Attenuate AMC3301 Family Radiated Emissions EMI Jun. 20, 2021
User guide AMC3306 and AMC3336 Evaluation Module User's Guide (Rev. A) Mar. 23, 2021
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

Design & development

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Hardware development

document-generic User guide

The AMC3336 evaluation module (EVM) is a platform for evaluating the AMC3336, a precision isolated modulator with an integrated DC/DC converter that powers the high side of the amplifier. AMC3336 is a 7-kV reinforced isolated modulator designed for use in current shunt measuring applications.

A (...)

  • Integrated DC/DC converter for high-side power
  • Reinforced isolated modulator: 7-kV peak, 10-kV surge
  • ±1-V input range
  • Delta-sigma modulator with 16 bits of resolution

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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 (...)
  • Leverages Cadence PSpice Technology
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  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
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 (...)
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