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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.

TMCS1100

SBOS820 – SEPTEMBER 2019

TMCS1100 High-Precision, Isolated Current Sensor With External Reference

1

1 Features

1

•

Total error current sensing: < 1%

–

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

–

Offset error: ±10.5 mA, –40ºC to +125ºC

–

Offset current drift: 0.01 mA/°C

–

Linearity over temperature: 0.1% typ

•

UL1577, VDE 0884-11, 60950 certifications

planned

–

–

•

Bidirectional and unidirectional linear current

sensing

•

External reference voltage enables variable

measurable ranges and differential signal chains

•

Operating supply range: 3 V to 5.5 V

•

Signal bandwidth: 80-kHz

•

Multiple sensitivity options:

–

TMCS1100A1: 50 mV/A

–

TMCS1100A2: 100 mV/A

–

TMCS1100A3: 200 mV/A

–

TMCS1100A4: 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 TMCS1100 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% 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 TMCS1100 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. The VREF input pin provides a variable

zero-current output voltage, enabling bidirectional or

unidirectional current sensing.

The TMCS1100 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)

TMCS1100

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