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TMCS1108A1BQDRQ1 +BOM

AEC-Q100, ±100-V isolated Hall-effect current sensor with internal reference

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TMCS1108A1BQDRQ1
Datasheet:

TMCS1108A1BQDRQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100
For Measuring:

AC/DC
Sensor Type:

Hall Effect
Current - Sensing:

±45A
EDA/CAD Models:

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TMCS1108A1BQDRQ1 General Description

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.

Key Features

AEC-Q100 qualified for automotive applications
- Temperature Grade 1: –40°C to 125°C, T_A
Functional Safety-Capable
- Documentation available to aid functional safety system design
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

Specifications

Category	Sensors, TransducersCurrent Sensors	Series	Automotive, AEC-Q100
For Measuring	AC/DC	Sensor Type	Hall Effect
Current - Sensing	±45A	Number of Channels	1
Output	Ratiometric, Voltage	Sensitivity	50mV/A
Frequency	80kHz	Linearity	±0.5%
Accuracy	-	Voltage - Supply	3V ~ 5.5V
Response Time	6.5µs	Current - Supply (Max)	6mA
Operating Temperature	-40°C ~ 125°C (TA)	Polarization	Bidirectional
Mounting Type	Surface Mount