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TMCS1108A3UQDRQ1 +BOM

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

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TMCS1108A3UQDRQ1
Datasheet:

TMCS1108A3UQDRQ1 Datasheet (PDF)
Continuous Current (max) (A):

20
Working Isolation Voltage (VIOWM) (Vrms):

71
Magnetic Sensitivity (typ) (mV/A):

50, 100, 200, 400
Input Offset Current (±) (max) (mA):

60, 75, 100, 160
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TMCS1108A3UQDRQ1 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

Continuous current (max) (A)	20	Working isolation voltage (VIOWM) (Vrms)	71
Magnetic sensitivity (typ) (mV/A)	50, 100, 200, 400	Input offset current (±) (max) (mA)	60, 75, 100, 160
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	CMTI (kV/µs)	50
Small-signal bandwidth (Hz)	80000	Sensitivity error (%)	0.9
Sensitivity error drift (±) (max) (ppm/°C)	105	Rating	Automotive
TI functional safety category	Functional Safety-Capable	Operating temperature range (°C)	-40 to 125
Creepage (min) (mm)	4	Clearance (min) (mm)	4
Isolation rating	Functional	Surge isolation voltage (VIOSM) (VPK)	6000
feature-packaging	Tape and Reel	feature-rad-hard
feature-pin-count	8	feature-cecc-qualified
feature-esd-protection		feature-military
feature-aec-qualified	Yes	feature-aec-qualified-number	AEC-Q100
feature-auto-motive	Yes	feature-p-pap	Yes
feature-eccn-code	EAR99	feature-svhc
feature-svhc-exceeds-threshold	No