Precision isolated current sensor with internal reference
Product details
Parameters
Package | Pins | Size
Features
- Total error: ±0.51% typical, ±1.15% maximum, –40ºC to 85ºC
- Sensitivity error: ±0.5%
- Offset error: 9 mA
- Offset drift: 0.04 mA/ºC
- Linearity error: 0.05%
- Lifetime and environmental drift: <±0.5%
- 3-kVRMS isolation rating
- Robust 600-V lifetime working voltage
- Bidirectional and unidirectional 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
- Safety related certifications (planned)
- UL 1577 Component Recognition Program
- IEC/CB 62368-1
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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 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 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 6 mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Evaluation of the TMCS1101Ax 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
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
Ordering & quality
- RoHS
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- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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