TMCS1100

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Precision isolated current sensor with external reference

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Product details

Parameters

Continuous current (Max) (A) 20 Sensitivity (Typ) (mV/A) 50, 100, 200, 400 Sensitivity error (%) 0.2 Sensitivity error drift (+/-) (Max) (ppm/°C) 50 Input offset current (+/-) (Max) (mA) 25 Input offset current drift (+/-) (Typ) (µA/°C) 0.1 Features Externally Driven Zero Current Reference Voltage Small signal bandwidth (kHz) 80 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 3 Iq (Max) (mA) 5 CMTI (kV/µs) 25 open-in-new Find other Magnetic current sensors

Package | Pins | Size

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Features

  • 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
    • 600-VDC/VPK working isolation
    • 3-kVRMS withstand isolation
  • 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

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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.

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Sample availability

Preproduction samples are available (PMCS1100AxQDR). Request now

Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$59.00
Description
The TMCS1100EVM is a tool intended to facilitate rapid, convenient use of the TMCS1100, an isolated Hall-effect precision crrent sense monitor utilizing an external reference.  This evaluation module allows the user to push the max operating current through the Hall-input side while measuring (...)
Features
  • Evaluation of the TMCS1100Ax in all gain options
  • Test points to allow ease of acess to device pins
  • Large copper planes to help with heat dissipation
  • Large lug connectors to connect the EVM to large current carrying leads

Design tools & simulation

SIMULATION MODELS Download
SBOMB06.ZIP (19 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMB07.ZIP (43 KB) - TINA-TI Spice Model

Reference designs

REFERENCE DESIGNS Download
High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
TIDA-010065 — This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
1-kW, 80 Plus titanium, GaN CCM totem pole bridgeless PFC and half-bridge LLC reference design
TIDA-010062 This reference design is a digitally controlled, compact 1-kW AC/DC power supply design for server power supply unit (PSU) and telecom rectifier applications. The highly efficient design supports two main power stages, including a front-end continuous conduction (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
In-phase current-sense reference design for 230-VAC motor drives using hall-effect current sensors
TIDA-010059 — This reference design features the Hall-effect current sensor, TMCS1100, that can measure currents with an absolute error of < 1% (–40 to 125°C) and provide a working isolation voltage of up to 600 V. The low-resistance in-package current sensing element and lack of need for high-side (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
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Ordering & quality

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