Product details


Continuous current (Max) (A) 20 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 open-in-new Find other Hall-effect current sensors

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Hall-effect current sensors


  • Total error: ±0.4% typical, ±0.9% maximum, –40ºC to 85ºC
    • Sensitivity error: ±0.4%
    • Offset error: 7 mA
    • Offset drift: 0.04 mA/ºC
    • 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 (planned)
    • UL 1577 Component Recognition Program
    • IEC/CB 62368-1

All trademarks are the property of their respective owners.

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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.

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NEW TMCS1101 ACTIVE Precision isolated current sensor with internal reference The TMCS1101 has the same functionality but with an internal reference voltage

Technical documentation

Design & development

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

Hardware development

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 (...)
  • Evaluation of the TMCS1100Ax in all gain options
  • Test points to allow ease of acess to device pins
  • Large copper planes to help with heat dissipation
  • Large lug connectors to connect the EVM to large current carrying leads

Design tools & simulation

SBOMB06A.TSC (171 KB) - TINA-TI Reference Design
SBOMB07A.ZIP (26 KB) - TINA-TI Spice Model
SBOMBE3.ZIP (21 KB) - PSpice Model
SBOMBE5.ZIP (21 KB) - PSpice Model
SBOMBE6.ZIP (22 KB) - PSpice Model
SBOMBE7.ZIP (20 KB) - PSpice Model
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 (...)

Reference designs

1-kW, 80 Plus titanium, GaN CCM totem pole bridgeless PFC and half-bridge LLC reference design
TIDA-010062 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
In-phase current-sense reference design for 230-VAC motor drives using hall-effect current sensors
TIDA-010059 — 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

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

Ordering & quality

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