text.skipToContent text.skipToNavigation


Precision isolated current sensor with internal reference

Availability: 519


Package | PIN: SOIC (D) | 8
Temp: Q (-40 to 125)
Package qty | Carrier: 2,500 | LARGE T&R
Qty Price
1-99 $3.11
100-249 $2.73
250-999 $1.91
1,000+ $1.54


  • Total error current sensing: < 1.5%
    • Sensitivity error: ±0.3%, –40ºC to+125ºC
    • Offset error: ±12.5 mA, –40ºC to +125ºC
    • Offset current drift: 0.02 mA/°C
    • Linearity over temperature: 0.1%typ
  • UL1577, VDE 0884-11, 60950 certifications planned
    • 600-VDC/VPKworking isolation
    • 3-kVRMS withstandisolation
  • Bidirectional and unidirectional linear current sensing
  • Zero drift internal reference
  • Operating supply range: 3 V to 5.5 V
  • Signal bandwidth: 80-kHz
  • Multiple sensitivity options:
    • TMCS1101A1U/B: 50mV/A
    • TMCS1101A2U/B: 100mV/A
    • TMCS1101A3U/B: 200mV/A
    • TMCS1101A4U/B: 400mV/A

All trademarks are the property of their respective owners.

Texas Instruments  PMCS1101A1UQDR

The TMCS1101 is a galvanically isolated Hall-effect current sensorcapable of dc or ac current measurement with high accuracy, excellent linearity, and temperaturestability. A low-drift, temperature-compensated signal chain provides < 1.5% full-scale error across the entiredevice temperature range.

The input current flows through an internal 1.8-mΩ conductor that generates a magneticfield measured by an integrated Hall-effect sensor. This structure eliminates externalconcentrators and simplifies PCB design. Low conductor resistance minimizes power loss and thermaldissipation. Inherent galvanic insulation provides a 600-V basic working isolation and 3-kVdielectric withstand isolation between the current path and circuitry. Integrated electricalshielding 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 TMCS1101 to operate from a single 3-V to 5.5-V powersupply, eliminates ratiometry errors, and improves supply noise rejection. The current polarity isconsidered positive when flowing into the positive input pin. Both unidirectional and bidirectional sensingvariants are available.

The TMCS1101 draws a maximum supply current of 5 mA, and allsensitivity options are specified over the operating temperature range of –40°C to +125°C.