Precision isolated current sensor with external reference
Product details
Parameters
Package | Pins | Size
Features
- Total error: ±0.4% typical, ±0.9% maximum, –40ºC to 85ºC
- Sensitivity error: ±0.4%
- Offset error: 7 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
- 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 (planned)
- UL 1577 Component Recognition Program
- IEC/CB 62368-1
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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 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.
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 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
Reference designs
Design files
-
download PMP40690 BOM Files.zip (327KB) -
download PMP40690 Assembly Files.zip (432KB) -
download PMP40690 Layer Plots.zip (2496KB) -
download PMP40690 CAD Files.zip (3876KB) -
download PMP40690 Gerber.zip (5577KB)
Design files
-
download TIDA-010062 Assembly Drawing.pdf (490KB) -
download TIDA-010062 PCB.pdf (1064KB) -
download TIDA-010062 CAD Files.zip (23805KB) -
download TIDA-010062 Gerber.zip (385KB) -
download TIDA-010062 BOM Files (Rev. A).zip (355KB)
Design files
-
download TIDA-010059 BOM Files.zip (128KB) -
download TIDA-010059 Assembly Files.zip (342KB) -
download TIDA-010059 Layer Plots.zip (1850KB) -
download TIDA-010059 CAD Files.zip (3911KB) -
download TIDA-010059 Gerber.zip (1465KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- 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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