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 TI functional safety category Functional Safety-Capable 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


  • AEC-Q100 qualified for automotive applications
    • Temperature Grade 1: –40°C to 125°C, TA
  • Functional Safety-Capable
  • 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 -Q1: 50 mV/A
    • TMCS1100A2 -Q1: 100 mV/A
    • TMCS1100A3 -Q1: 200 mV/A
    • TMCS1100A4 -Q1: 400 mV/A
  • Safety related certifications
    • UL 1577 Component Recognition Program
    • IEC/CB 62368-1
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The TMCS1100-Q1 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-Q1 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-Q1 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-Q1 ACTIVE Automotive, precision isolated current sensor with internal reference Same functionality but with an internal reference voltage

Technical documentation

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Type Title Date
* Data sheet TMCS1100-Q1 AEC-Q100, 1% High-Precision, Basic Isolation Hall-Effect Current Sensor With ±600-V Working Voltage datasheet Jun. 04, 2021
User guide TMCS1100EVM User's Guide (Rev. B) Aug. 25, 2021
Functional safety information TMCS1100-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Mar. 30, 2021
Application note Thermal Implementation Guide for In-Package Magnetic Current Sensors Jul. 12, 2020
White paper Improving Performance in High-Voltage Systems With Zero-Drift Hall-Effect Curren Jun. 29, 2020
Application note Precision Designs with Non-Ratiometric Magnetic Current Sensors Jul. 01, 2019
Application note Low-Drift, Precision, In-Line Isolated Magnetic Motor Current Measurements Apr. 15, 2019

Design & development

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

Hardware development

document-generic User guide
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
SBOMB07B.ZIP (27 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

Reference designs

Automotive 400-V battery to 12-V, 3.6-kW DC/DC converter reference design
TIDA-020031 — This reference design is a 3.6-kW, automotive 400-V to 12-V unidirectional converter which converts the 200-V to 450-V DC input to 12-V, 300-A maximum output. Circuit breaker is applied for overcurrent and overvoltage protection. The converter is designed with SiC MOSFETs on the high voltage side (...)
document-generic Schematic

CAD/CAE symbols

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SOIC (D) 8 View options

Ordering & quality

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  • MTBF/FIT estimates
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Support & training

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