Product details

Continuous current (Max) (A) 20 Isolation working voltage VIOWM (rms) (V) 71 Sensitivity (Typ) (mV/A) 50, 100, 200, 400 Sensitivity error (%) 0.9 Sensitivity error drift (+/-) (Max) (ppm/°C) 105 Input offset current (+/-) (Max) (mA) 40 Input offset current drift (+/-) (Typ) (µA/°C) 0.2 Features Internal Zero Current Reference Voltage Small signal bandwidth (kHz) 80 Supply voltage (Max) (V) 5 Supply voltage (Min) (V) 3 Iq (Max) (mA) 5 CMTI (kV/µs) 50 TI functional safety category Functional Safety-Capable
Continuous current (Max) (A) 20 Isolation working voltage VIOWM (rms) (V) 71 Sensitivity (Typ) (mV/A) 50, 100, 200, 400 Sensitivity error (%) 0.9 Sensitivity error drift (+/-) (Max) (ppm/°C) 105 Input offset current (+/-) (Max) (mA) 40 Input offset current drift (+/-) (Typ) (µA/°C) 0.2 Features Internal Zero Current Reference Voltage Small signal bandwidth (kHz) 80 Supply voltage (Max) (V) 5 Supply voltage (Min) (V) 3 Iq (Max) (mA) 5 CMTI (kV/µs) 50 TI functional safety category Functional Safety-Capable
SOIC (D) 8 19 mm² 4.9 x 3.9
  • AEC-Q100 qualified for automotive applications
    • Temperature Grade 1: –40°C to 125°C, TA
  • Functional Safety-Capable
  • Total error: ±1% typical, ±3% maximum, –40°C to 125°C
    • Sensitivity error: ±0.9%
    • Offset error: 40 mA
    • Offset drift: 0.2 mA/°C
    • Linearity error: 0.5%
  • Multiple sensitivity options:
    • TMCS1108A1B/U -Q1: 50 mV/A
    • TMCS1108A2B/U -Q1: 100 mV/A
    • TMCS1108A3B/U -Q1: 200 mV/A
    • TMCS1108A4B/U -Q1: 400 mV/A
  • Zero drift internal reference
  • Bidirectional and unidirectional current sensing
  • Operating supply range: 3 V to 5.5 V
  • Signal bandwidth: 80 kHz
  • Robust 100-V galvanic isolation
  • AEC-Q100 qualified for automotive applications
    • Temperature Grade 1: –40°C to 125°C, TA
  • Functional Safety-Capable
  • Total error: ±1% typical, ±3% maximum, –40°C to 125°C
    • Sensitivity error: ±0.9%
    • Offset error: 40 mA
    • Offset drift: 0.2 mA/°C
    • Linearity error: 0.5%
  • Multiple sensitivity options:
    • TMCS1108A1B/U -Q1: 50 mV/A
    • TMCS1108A2B/U -Q1: 100 mV/A
    • TMCS1108A3B/U -Q1: 200 mV/A
    • TMCS1108A4B/U -Q1: 400 mV/A
  • Zero drift internal reference
  • Bidirectional and unidirectional current sensing
  • Operating supply range: 3 V to 5.5 V
  • Signal bandwidth: 80 kHz
  • Robust 100-V galvanic isolation

The TMCS1108-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 <3% 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 100-V functional 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 multiple sensitivity options. Fixed sensitivity allows the TMCS1108-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. Both unidirectional and bidirectional sensing variants are available.

The TMCS1108-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.

The TMCS1108-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 <3% 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 100-V functional 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 multiple sensitivity options. Fixed sensitivity allows the TMCS1108-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. Both unidirectional and bidirectional sensing variants are available.

The TMCS1108-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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Technical documentation

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Type Title Date
* Data sheet TMCS1108-Q1 AEC-Q100, 3% Functional Isolation Hall-Effect Current Sensor With ±100-V Working Voltage datasheet 01 Jul 2021
Functional safety information TMCS1108-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 30 Mar 2021
User guide TMCS1108EVM User's Guide 04 Dec 2020
Application note Thermal Implementation Guide for In-Package Magnetic Current Sensors 12 Jul 2020
White paper Improving Performance in High-Voltage Systems With Zero-Drift Hall-Effect Curren 29 Jun 2020
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

TMCS1108EVM — TMCS1108 isolated Hall-effect current sensing evaluation module

The TMCS1108EVM is intended to facilitate rapid, convenient use of the TMCS1108, an isolated Hall-effect precision current sense monitor utilizing an internal ratiometric reference. This evaluation module (EVM) allows the designer to push the max operating current through the Hall-input side while (...)

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Simulation model

TMCS1108A1B PSpice Model

SBOMBO7.ZIP (195 KB) - PSpice Model
Simulation model

TMCS1108A3B PSpice Model

SBOMBO8.ZIP (195 KB) - PSpice Model
Simulation model

TMCS1108A4B PSpice Model

SBOMBO9.ZIP (195 KB) - PSpice Model
Simulation model

TMCS1108 TINA-TI SPICE Model

SBOMBV2.ZIP (55 KB) - TINA-TI Spice Model
Simulation model

TMCS1108A4U PSpice Model

SBOMBV3.ZIP (193 KB) - PSpice Model
Simulation model

TMCS1108A3U PSpice Model

SBOMBV4.ZIP (193 KB) - PSpice Model
Simulation model

TMCS1108A2U PSpice Model

SBOMBV5.ZIP (194 KB) - PSpice Model
Simulation model

TMCS1108A1U PSpice Model

SBOMBV6.ZIP (194 KB) - PSpice Model
Simulation model

TMCS1108A2B PSpice Model

SBOMBV7.ZIP (194 KB) - PSpice Model
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SOIC (D) 8 View options

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