TMCS1108

Name: TMCS1108
Brand: TI
SKU: TMCS1108
Price: 0.68 USD

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±100V basic isolation, 20Arms 80kHz Hall-effect current sensor with reference

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Data sheet

document-pdfAcrobat TMCS1108 3% Functional Isolation Hall-Effect Current Sensor With ±100-V Working Voltage datasheet (Rev. A) PDF | HTML

TMCS1108

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Data sheet

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Product details

Continuous current (max) (A)

20

Working isolation voltage (VIOWM) (Vrms)

71

Input offset current (±) (max) (mA)

8, 10, 12, 30

Input offset current drift (±) (typ) (µA/°C)

0.2

Features

Internal Zero Current Reference Voltage

Supply voltage (max) (V)

5

Supply voltage (min) (V)

3

Iq (max) (mA)

5

Small-signal bandwidth (kHz)

80

Sensitivity error (%)

0.9

Sensitivity error drift (±) (max) (ppm/°C)

105

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Creepage (min) (mm)

4

Clearance (min) (mm)

4

Isolation rating

Functional

Surge isolation voltage (VIOSM) (VPK)

6000

Continuous current (max) (A)

20

Working isolation voltage (VIOWM) (Vrms)

71

Input offset current (±) (max) (mA)

8, 10, 12, 30

Input offset current drift (±) (typ) (µA/°C)

0.2

Features

Internal Zero Current Reference Voltage

Supply voltage (max) (V)

5

Supply voltage (min) (V)

3

Iq (max) (mA)

5

Small-signal bandwidth (kHz)

80

Sensitivity error (%)

0.9

Sensitivity error drift (±) (max) (ppm/°C)

105

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Creepage (min) (mm)

4

Clearance (min) (mm)

4

Isolation rating

Functional

Surge isolation voltage (VIOSM) (VPK)

6000

SOIC (D)

8

29.4 mm² 4.9 x 6

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: 50 mV/A
- TMCS1108A2B/U: 100 mV/A
- TMCS1108A3B/U: 200 mV/A
- TMCS1108A4B/U: 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

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: 50 mV/A
- TMCS1108A2B/U: 100 mV/A
- TMCS1108A3B/U: 200 mV/A
- TMCS1108A4B/U: 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 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 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 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 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 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 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 3% Functional Isolation Hall-Effect Current Sensor With ±100-V Working Voltage datasheet (Rev. A)	PDF \| HTML	01 Jul 2021
	Application note	Simplify Your Current Sensing Design in Negative Output Power Supply Designs (Rev. A)	PDF \| HTML	15 Oct 2024
	Application brief	Introduction to TI Magnetic Sense Simulator Features	PDF \| HTML	05 Dec 2023
	User guide	Texas Instruments' Magnetic Sense Simulator User's Guide	PDF \| HTML	04 Dec 2023
	Application brief	Current Sensing in Collaborative and Industrial Robotic Arms (Rev. B)	PDF \| HTML	24 Jul 2023
	Application brief	Low-Drift, Precision, In-Line Isolated Magnetic Motor Current Measurements (Rev. A)		24 Jul 2023
	Application note	TMCS110x Layout Challenges and Best Practices	PDF \| HTML	03 Dec 2022
	White paper	Improve High-Voltage System Efficiency With Zero-Drift Hall-Effect Current Sense (Rev. A)	PDF \| HTML	15 Mar 2022
	EVM User's guide	TMCS1108EVM User's Guide	PDF \| HTML	04 Dec 2020
	Application note	Thermal Implementation Guide for In-Package Magnetic Current Sensors	PDF \| HTML	12 Jul 2020
	Application brief	Precision Designs with Non-Ratiometric Magnetic Current Sensors		01 Jul 2019

Design & development

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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 (...)

User guide: PDF | HTML