TMCS1100 Texas instruments

TMCS1100

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TMCS1100

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Описание

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 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 600-V lifetime working voltage and 3-kVRMS basic 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 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 6 mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.

Total error: ±0.4% typical, ±0.9% maximum, –40°C to 85°C
- Sensitivity error: ±0.4%
- Offset error: 7 mA
- Offset drift: 0.04 mA/°C
- Linearity error: 0.05%
Lifetime and environmental drift: <±0.5%
3-kV_RMS isolation rating
Robust 600-V lifetime working voltage
Bidirectional and unidirectional current sensing
External reference voltage
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
Safety related certifications
- UL 1577 Component Recognition Program
- IEC/CB 62368-1

Continuous current (max) (A)	20
Working isolation voltage (VIOWM) (Vrms)	424
Magnetic sensitivity (typ) (mV/A)	50, 100, 200, 400
Input offset current (±) (max) (mA)	25
Input offset current drift (±) (typ) (µA/°C)	0.1
Features	Externally Driven Zero Current Reference Voltage
Supply voltage (max) (V)	5.5
Supply voltage (min) (V)	3
Iq (max) (mA)	6
CMTI (kV/µs)	25
Small-signal bandwidth (Hz)	80000
Sensitivity error (%)	0.2
Sensitivity error drift (±) (max) (ppm/°C)	50
Rating	Catalog
Operating temperature range (°C)	-40 to 125
Creepage (min) (mm)	4
Clearance (min) (mm)	4
Isolation rating	Basic
Surge isolation voltage (VIOSM) (VPK)	6000