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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

TMCS1101

SBOS825 – SEPTEMBER 2019

TMCS1101 Precision, Isolated Current Sensor With Internal Reference

1

1 Features

1

•

Total error current sensing: < 1.5%

–

Sensitivity error: ±0.3%, –40ºC to +125ºC

–

Offset error: ±12.5 mA, –40ºC to +125ºC

–

Offset current drift: 0.02 mA/°C

–

Linearity over temperature: 0.1% typ

•

UL1577, VDE 0884-11, 60950 certifications

planned

–

–

•

Bidirectional and unidirectional linear current

sensing

•

Zero drift internal reference

•

Operating supply range: 3 V to 5.5 V

•

Signal bandwidth: 80-kHz

•

Multiple sensitivity options:

–

TMCS1101A1U/B: 50 mV/A

–

TMCS1101A2U/B: 100 mV/A

–

TMCS1101A3U/B: 200 mV/A

–

TMCS1101A4U/B: 400 mV/A

2 Applications

•

Motor and load control

•

Inverter and H-bridge current measurements

•

Power factor correction

•

Overcurrent protection

•

DC and ac power monitoring

3 Description

The TMCS1101 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 < 1.5% full-scale

error across the entire 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 PCB

design. Low conductor resistance minimizes power

loss

and

thermal

dissipation.

Inherent

galvanic

insulation provides a 600-V basic working isolation

and 3-kV dielectric withstand isolation between the

current

path

and

circuitry.

Integrated

electrical

shielding enables excellent common-mode rejection

and transient immunity protection.

The output voltage is proportional to the input current

with four sensitivity options. Fixed sensitivity allows

the TMCS1101 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 TMCS1101 draws a maximum supply current of

5 mA, and all sensitivity options are specified over the

operating temperature range of –40°C to +125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TMCS1101

SOIC (8)

4.90 mm x 3.90 mm

(1) For all available packages, see the package option addendum

at the end of the data sheet.

Typical Application