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TMCS1100

ACTIVE

Precision isolated current sensor with external reference

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Data sheet

TMCS1100

ACTIVE
Data sheet Order now

Product details

Continuous current (Max) (A) 20 Isolation working voltage VIOWM (rms) (V) 424 Sensitivity (Typ) (mV/A) 50, 100, 200, 400 Sensitivity error (%) 0.2 Sensitivity error drift (+/-) (Max) (ppm/°C) 50 Input offset current (+/-) (Max) (mA) 25 Input offset current drift (+/-) (Typ) (µA/°C) 0.1 Features Externally Driven Zero Current Reference Voltage Small signal bandwidth (kHz) 80 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 3 Iq (Max) (mA) 5 CMTI (kV/µs) 25
Continuous current (Max) (A) 20 Isolation working voltage VIOWM (rms) (V) 424 Sensitivity (Typ) (mV/A) 50, 100, 200, 400 Sensitivity error (%) 0.2 Sensitivity error drift (+/-) (Max) (ppm/°C) 50 Input offset current (+/-) (Max) (mA) 25 Input offset current drift (+/-) (Typ) (µA/°C) 0.1 Features Externally Driven Zero Current Reference Voltage Small signal bandwidth (kHz) 80 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 3 Iq (Max) (mA) 5 CMTI (kV/µs) 25
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SOIC (D) 8 19 mm² 4.9 x 3.9
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  • Total error: ±0.4% typical, ±0.9% maximum, –40°C to 85°C
    • Sensitivity error: ±0.4%
    • Offset error: 7 mA
    • Offset drift: 0.04 mA/°C
    • Linearity error: 0.05%
  • Lifetime and environmental drift: <±0.5%
  • 3-kVRMS isolation rating
  • Robust 600-V lifetime working voltage
  • Bidirectional and unidirectional current sensing
  • External reference voltage
  • Operating supply range: 3 V to 5.5 V
  • Signal bandwidth: 80 kHz
  • Multiple sensitivity options:
    • TMCS1100A1: 50 mV/A
    • TMCS1100A2: 100 mV/A
    • TMCS1100A3: 200 mV/A
    • TMCS1100A4: 400 mV/A
  • Safety related certifications
    • UL 1577 Component Recognition Program
    • IEC/CB 62368-1
  • Total error: ±0.4% typical, ±0.9% maximum, –40°C to 85°C
    • Sensitivity error: ±0.4%
    • Offset error: 7 mA
    • Offset drift: 0.04 mA/°C
    • Linearity error: 0.05%
  • Lifetime and environmental drift: <±0.5%
  • 3-kVRMS isolation rating
  • Robust 600-V lifetime working voltage
  • Bidirectional and unidirectional current sensing
  • External reference voltage
  • Operating supply range: 3 V to 5.5 V
  • Signal bandwidth: 80 kHz
  • Multiple sensitivity options:
    • TMCS1100A1: 50 mV/A
    • TMCS1100A2: 100 mV/A
    • TMCS1100A3: 200 mV/A
    • TMCS1100A4: 400 mV/A
  • Safety related certifications
    • UL 1577 Component Recognition Program
    • IEC/CB 62368-1
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The TMCS1100 is a galvanically isolated Hall-effect current sensor capable of DC or AC current measurement with high accuracy, excellent linearity, and temperature stability. A low-drift, temperature-compensated signal chain provides < 1% full-scale error across the device temperature range.

The input current flows through an internal 1.8-mΩ conductor that generates a magnetic field measured by an integrated Hall-effect sensor. This structure eliminates external concentrators and simplifies design. Low conductor resistance minimizes power loss and thermal dissipation. Inherent galvanic insulation provides a 600-V lifetime working voltage and 3-kVRMS basic isolation between the current path and circuitry. Integrated electrical shielding enables excellent common-mode rejection and transient immunity.

The output voltage is proportional to the input current with four sensitivity options. Fixed sensitivity allows the TMCS1100 to operate from a single 3-V to 5.5-V power supply, eliminates ratiometry errors, and improves supply noise rejection. The current polarity is considered positive when flowing into the positive input pin. The VREF input pin provides a variable zero-current output voltage, enabling bidirectional or unidirectional current sensing.

The TMCS1100 draws a maximum supply current of 6 mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.

The TMCS1100 is a galvanically isolated Hall-effect current sensor capable of DC or AC current measurement with high accuracy, excellent linearity, and temperature stability. A low-drift, temperature-compensated signal chain provides < 1% full-scale error across the device temperature range.

The input current flows through an internal 1.8-mΩ conductor that generates a magnetic field measured by an integrated Hall-effect sensor. This structure eliminates external concentrators and simplifies design. Low conductor resistance minimizes power loss and thermal dissipation. Inherent galvanic insulation provides a 600-V lifetime working voltage and 3-kVRMS basic isolation between the current path and circuitry. Integrated electrical shielding enables excellent common-mode rejection and transient immunity.

The output voltage is proportional to the input current with four sensitivity options. Fixed sensitivity allows the TMCS1100 to operate from a single 3-V to 5.5-V power supply, eliminates ratiometry errors, and improves supply noise rejection. The current polarity is considered positive when flowing into the positive input pin. The VREF input pin provides a variable zero-current output voltage, enabling bidirectional or unidirectional current sensing.

The TMCS1100 draws a maximum supply current of 6 mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.

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TMCS1100 won a gold Leadership in Engineering Achievement Program (LEAP) Award in the Switches & Sensors category.

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Technical documentation

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Type Title Date
* Data sheet TMCS1100 1% High-Precision, Basic Isolation Hall-Effect Current Sensor With ±600-V Working Voltage datasheet (Rev. B) 27 Jul 2021
Application note TMCS110x Layout Challenges and Best Practices 03 Dec 2022
User guide TMCS1100EVM User's Guide (Rev. B) 25 Aug 2021
Application note Current Sensing Applications in Communication Infrastructure Equipment (Rev. A) 29 Dec 2020
Application note Improving Power Amplifier Efficiency with Current Monitors (Rev. A) 29 Dec 2020
Application note Compact Multichannel Current Sensing 06 Nov 2020
Application note Thermal Implementation Guide for In-Package Magnetic Current Sensors 12 Jul 2020
Technical article How to select the right current sense technology for your high-voltage system 06 Jul 2020
White paper Improving Performance in High-Voltage Systems With Zero-Drift Hall-Effect Curren 29 Jun 2020
Technical article How to use Hall-effect current sensors in telecom rectifiers and server PSUs 06 May 2020
Technical article How current sensors help monitor and protect the world’s wireless infrastructure 30 Dec 2019
Application note Precision Designs with Non-Ratiometric Magnetic Current Sensors 01 Jul 2019
Application note Low-Drift, Precision, In-Line Isolated Magnetic Motor Current Measurements 15 Apr 2019

Design & development

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

Evaluation board

TMCS1100EVM — TMCS1100 isolated Hall-effect current sensing evaluation module

The TMCS1100EVM is a tool intended to facilitate rapid, convenient use of the TMCS1100, an isolated Hall-effect precision crrent sense monitor utilizing an external reference.  This evaluation module allows the user to push the max operating current through the Hall-input side while measuring (...)
document-pdfAcrobat User guide
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Simulation model

TMCS1100 TINA-TI Reference Design (Rev. A)

SBOMB06A.TSC (171 KB) - TINA-TI Reference Design
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Simulation model

TMCS1100 TINA-TI SPICE Model (Rev. B)

SBOMB07B.ZIP (27 KB) - TINA-TI Spice Model
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Simulation model

TMCS1100A4 PSpice Model

SBOMBE3.ZIP (21 KB) - PSpice Model
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Simulation model

TMCS1100A3 PSpice Model

SBOMBE5.ZIP (21 KB) - PSpice Model
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Simulation model

TMCS1100A2 PSpice Model

SBOMBE6.ZIP (22 KB) - PSpice Model
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Simulation model

TMCS1100A1 PSpice Model

SBOMBE7.ZIP (20 KB) - PSpice Model
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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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Reference designs

PMP41006 — 1-kW reference design with CCM totem pole PFC and current-mode LLC realized by C2000 and GaN

This reference design demonstrates a hybrid hysteresis control (HHC) method, a kind of current-mode control method, on half-bridge LLC stage with a C2000 F28004x microcontroller. The hardware is based on TIDA-010062, which is 1-kW, 80-Plus titanium, GaN CCM totem pole bridgeless PFC and half-bridge (...)
Reference designs

TIDA-010062 — 1-kW, 80 Plus titanium, GaN CCM totem pole bridgeless PFC and half-bridge LLC reference design

This reference design is a digitally controlled, compact 1-kW AC/DC power supply design for server power supply unit (PSU) and telecom rectifier applications. The highly efficient design supports two main power stages, including a front-end continuous conduction (...)
document-generic Schematic
Reference designs

PMP40690 — 4-kW interleaved CCM totem pole bridgeless PFC reference design using C2000™ MCU and GaN

This reference design is a 4-kW interleaved CCM totem pole (TTPL) bridgeless PFC reference design using a 64-pin C2000™ microcontroller, LM3410 gallium nitride device and TMCS1100 hall sensor. It is based on TIDM-02008 bidirectional interleaved CCM TTPL bridgeless PFC reference (...)
document-generic Schematic
Reference designs

TIDA-010059 — In-phase current-sense reference design for 230-VAC motor drives using hall-effect current sensors

This reference design features the Hall-effect current sensor, TMCS1100, that can measure currents with an absolute error of < 1% (–40 to 125°C) and provide a working isolation voltage of up to 600 V. The low-resistance in-package current sensing element and lack of need for high-side (...)
document-generic Schematic
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