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Product details

Parameters

Input range (Vp-p) 250mV Interface type Serial Sample rate (Max) (MSPS) 0.078 Rating Catalog Isolation (kV peak) 4.25 CMTI (Min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) -80 Operating temperature range (C) -40 to 125 INL (Max) (+/-LSB) 9 Power consumption (Typ) (mW) 88 open-in-new Find other Isolated ADCs

Package | Pins | Size

SOIC (DW) 16 77 mm² 10.3 x 7.5 SOIC (DWV) 8 67 mm² 5.85 x 11.5 open-in-new Find other Isolated ADCs

Features

  • ±250-mV input voltage range optimized for shunt resistors
  • Safety-related certifications:
    • 4250-VPK (AMC1204B) basic isolation per DIN VDE V 0884-11: 2017-01
    • 3005-VRMS (AMC1204B) isolation for 1 minute per UL1577
    • CAN/CSA no. 5A-component acceptance service notice and DIN EN 61010-1
    • Working voltage: 1200 VPEAK
    • Transient immunity: 15 kV/µs
  • High electromagnetic field immunity
    (see SLLA181A application report)
  • Outstanding AC performance:
    • SNR: 84 dB (minimum)
    • THD: –80 dB (maximum)
  • Excellent DC precision:
    • INL: ±8 LSB (maximum)
    • Gain Error: ±2% (maximum)
  • External clock input for easier synchronization
  • Fully specified over the extended industrial temperature range
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Description

The AMC1204 and AMC1204B are 1-bit digital output, isolated delta-sigma (ΔΣ) modulators that can be clocked at up to 20 MHz. The digital isolation of the modulator output is provided by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been certified to provide basic galvanic isolation of up to 4000 VPEAK (AMC1204) and 4250 VPEAK (AMC1204B) according to UL1577, VDE V 0884-11, and CSA standards or specifications.

The AMC1204 and AMC1204B provide a single-chip solution for measuring the small signal of a shunt resistor across an isolated barrier. These types of resistors are typically used to sense currents in motor control inverters, green energy generation systems, and other industrial applications. The AMC1204 and AMC1204B differential inputs easily connect to the shunt resistor or other low-level signal sources. An internal reference eliminates the need for external components. When used with an appropriate external digital filter, an effective number of bits (ENOB) of 14 is achieved at a data rate of 78 kSPS.

A 5-V analog supply (AVDD) is used by the modulator while the isolated digital interface operates from a 3-V, 3.3-V, or 5-V supply (DVDD). The AMC1204 and AMC1204B are available in SOIC-16 (DW) and SOIC-8 (DWV) packages and are specified from –40°C to 105°C.

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Technical documentation

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Type Title Date
* Data sheet AMC1204 20-MHz, Second-Order, Isolated Delta-Sigma Modulator for Current-Shunt Measurement datasheet (Rev. F) Feb. 11, 2020
White paper Best in Class Radiated Emissions EMI Perf. with AMC1300B-Q1 Isolated Amplifier Jun. 29, 2020
White paper Comparing isolated amplifiers and isolated modulators (Rev. A) Feb. 28, 2019
Certificate UL Certification (File: E181974 Project: 478705069) (Rev. C) Jun. 11, 2018
Application note Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
User guide AMC1210MB-EVM User's Guide (Rev. A) Feb. 04, 2016
Certificate CSA Certification (Certificate: 220991) (Rev. A) Oct. 23, 2015
Application note How to Optimize Performance of AMC1204 in Voltage Sensing Aug. 31, 2015
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 TIC Digital Interface (Rev. A) Dec. 02, 2013
User guide AMC1204EVM User Guide (Rev. A) Sep. 04, 2013
User guide AMC1204EVM User Guide Aug. 06, 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
75
Description

The AMC1204 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 AMC1204EVM is a small form factor board containing all the necessary components (...)

Features
  • 2mm, 2-terminal screw connectors to provide easy access to the analog inputs of the modulator
  • 9-pin sub-D connector to provide modulator digital output (DATA) and modulator clock input (CLKIN)
  • Compatible with the AMC1210 Digital Filter Chip
EVALUATION BOARD Download
document-generic User guide
Description

The AMC1210MB-EVM is a complete evaluation kit for the AMC1210 & ADS1205 in resolver applications and part of a modular evaluation system for evaluating TI delta-sigma modulators. The AMC1210MB-EVM software allows use of the AMC1210 in a variety of configurations for resolver and current shunt (...)

Features
  • Full-featured evaluation board for the AMC1210 quad digital filter for second-order delta-sigma modulators
  • Contains all support circuitry needed for the AMC1210
  • Onboard clocking for built-in ADS1205
  • Stellaris™ LM3S3748 ARM™ processor and parallel interface to AMC1210
  • JTAG header for reprogramming the (...)
EVALUATION BOARD Download
document-generic User guide
999
Description

This board supports: TAS2555YZEVMTAS2557EVM and TAS2559EVM.

The Smart Amplifier Speaker Characterization Board, when used in conjunction with a supported TI Smart Amplifier and PurePath Console software, provides users the ability to measure speaker excursion, temperature and other parameters for (...)

Features
  • Easily and quickly characterize speakers
  • Quick connection to TI Smart Amplifier EVMs
  • Microphone included for SPL measurements
  • Laser input for speaker excursion measurements

Design tools & simulation

SIMULATION MODEL Download
SBAM095.ZIP (41 KB) - IBIS Model
CALCULATION TOOL Download
SBAR010.ZIP (3354 KB)

Reference designs

REFERENCE DESIGNS Download
Distributed multi-axis servo drive over fast serial interface (FSI) reference design
TIDM-02006 — This reference design presents an example distributed or decentralized multi-axis servo drive over Fast Serial Interface (FSI) using C2000™ real-time controllers. Multi-axis servo drives are used in many applications such as factory automation and robots. The cost per axis, performance and (...)
document-generic Schematic
Design files
REFERENCE DESIGNS Download
Industrial Servo Drive and AC Inverter Drive Reference Design
TIDM-SERVODRIVE The DesignDRIVE Development Kit is a reference design for a complete industrial drive directly connecting to a three phase ACI or PMSM motor. Many drive topologies can be created from the combined control, power and communications technologies included on this single platform.  Includes (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Motherboard/controller for the AMC1210
TIDA-RESOLVER-APPLICATIONS-REFERENCE-DESIGN This is a reference design for resolver applications and part of a modular system for evaluating our delta-sigma modulators. The software included allows use of the AMC1210 in a variety of configurations for resolver and current-shunt applications and features a data-export utility to support data (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options
SOIC (DWV) 8 View options

Ordering & quality

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  • Ongoing reliability monitoring

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