PMCS1101A3UQDR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments PMCS1101A3UQDR is a precision isolated current sensor with an integrated internal reference, delivering an analog voltage output proportional to measured current. It features galvanic isolation in a compact 8-pin SOP package measuring 4.9 x 3.9 x 1.75 mm for surface-mount assembly. Suitable for motor drive, solar inverter, and industrial power monitoring applications requiring safe isolation.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- PMCS1101A3UQDR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Galvanic isolation between high-voltage current path and analog output enables safe sensing in motor drives and inverters without external isolation transformers
- Integrated internal reference ensures stable analog voltage output proportional to sensed current across supply and temperature variations
- Compact SOP-8 surface-mount package (4.9 x 3.9 x 1.75 mm) simplifies PCB integration of isolated current sensing in space-constrained power designs
Applications
The PMCS1101A3UQDR is designed for isolated current monitoring in applications such as solar inverters, motor drive controllers, and industrial power supplies where high-voltage isolation between the sensing element and the signal chain is mandatory. Its analog voltage output interfaces directly with microcontroller ADC inputs or analog control loops without requiring digital communication. The device simplifies isolated current feedback in closed-loop power conversion systems by integrating the reference and sensing element in a single 8-pin SOP.
Specifications
| Date Of Intro | 2019-09-20 |
| YTEOL | 0 |
| Body Breadth | 3.895mm |
| Body Height | 1.75mm |
| Body Length or Diameter | 4.905mm |
| Mounting Feature | SURFACE MOUNT |
| Output | ANALOG |
| Output Type | ANALOG VOLTAGE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape/Style | RECTANGULAR |
| Sensors/Transducers Type | CURRENT SENSOR |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3V |
| Surface Mount | YES |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PMCS1101A3UQDR:
Frequently Asked Questions
Why is galvanic isolation important in the PMCS1101A3UQDR for motor drive current sensing?
Galvanic isolation separates the high-voltage motor phase current path from the low-voltage analog measurement circuit, preventing dangerous voltages from reaching the MCU or control logic. In a 3-phase inverter switching at hundreds of volts, the PMCS1101A3UQDR's isolation barrier protects the signal chain and complies with safety standards requiring 8mm or greater creepage distances between power and control circuits.
What output format does the PMCS1101A3UQDR provide and how does it interface with a microcontroller ADC?
The PMCS1101A3UQDR produces an analog voltage output that scales linearly with sensed current, referenced to the internal voltage reference. This analog output connects directly to a microcontroller's ADC input, typically in the 0V to 3.3V or 0V to 5V range, enabling 10-bit or 12-bit current measurement without a separate signal conditioning IC or digital interface decoder.
How does the integrated internal reference of the PMCS1101A3UQDR improve measurement consistency across temperature?
By including a precision internal reference, the PMCS1101A3UQDR eliminates dependency on the board-level supply for output midpoint voltage stability. External supply variations of ±5% or thermal drift across -40°C to +125°C operating range do not shift the zero-current output baseline, which would introduce current measurement offset errors in closed-loop power control algorithms.
For a solar inverter design, what PCB area does the PMCS1101A3UQDR require and how does it compare to discrete isolated sensing solutions?
The PMCS1101A3UQDR in its SOP-8 package occupies a PCB footprint of approximately 4.9 mm x 3.9 mm, or roughly 19 mm² including pad area. A discrete isolated current sensing solution using a current transformer, signal conditioning op-amp, and external reference would typically require 5 to 10 times more board area, making the integrated single-chip approach significantly more compact for solar inverter PCBs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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