PMCS1100A3QDR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
PMCS1100A3QDR is a precision isolated current sensor from Texas Instruments featuring an analog voltage output driven by an external reference for flexible scaling. Provides galvanic isolation between the high-voltage current path and the signal processing side, supporting safe measurement in motor drives and power conversion. Available in compact SOP-8 surface-mount package measuring approximately 4.9 mm x 3.9 mm.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- PMCS1100A3QDR 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 current path and analog output enables safe measurement in high-voltage motor drive and inverter applications
- External reference input allows the user to set output scaling and midpoint voltage, maximizing ADC input range utilization
- Analog voltage output simplifies interface to standard 12-bit and 16-bit SAR ADCs without digital communication overhead
Applications
The PMCS1100A3QDR is used in industrial motor drives, solar inverters, and UPS systems where isolated current sensing is required to protect low-voltage control circuitry from high-voltage bus hazards. Its external reference input enables designers to tailor the output range to match 3.3 V or 5 V ADC full-scale voltages, optimizing measurement resolution in power control loops requiring fast current feedback within a few microseconds.
Specifications
| Date Of Intro | 2019-09-13 |
| 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 PMCS1100A3QDR:
Frequently Asked Questions
How does the external reference input on PMCS1100A3QDR improve ADC measurement accuracy compared to a fixed-reference sensor?
By connecting the external reference pin to the ADC's own voltage reference, the PMCS1100A3QDR output swing tracks the ADC full-scale, eliminating the ratiometric error that arises when the sensor and ADC use independent references. This technique can reduce systematic gain error by several hundred ppm, which is significant in 16-bit current measurement chains where 1 LSB equals roughly 15 µV at 1 V full-scale.
What isolation capability does PMCS1100A3QDR provide, and why is isolation important in motor drive designs?
The PMCS1100A3QDR offers galvanic isolation between the high-voltage current sense path and the low-voltage analog output, protecting the microcontroller and signal processing circuitry from high-voltage bus transients that can reach 600 V or more in 3-phase motor drives. Without isolation, common-mode voltage transients from PWM switching at frequencies of 10 kHz to 20 kHz would couple directly into the ADC input and corrupt current feedback signals.
In which industrial power conversion applications is PMCS1100A3QDR typically deployed?
PMCS1100A3QDR is commonly used in 3-phase motor drives, solar string inverters, bidirectional DC-DC converters, and uninterruptible power supply (UPS) systems where per-phase current sensing with galvanic isolation is mandatory. The analog output is well matched to fast current control loops that need to sample and process current feedback within 1 µs to 5 µs per switching cycle.
How does the SOP-8 package of PMCS1100A3QDR affect PCB layout for isolation clearance?
The SOP-8 package body is approximately 4.9 mm long by 3.9 mm wide with 1.75 mm height, and the internal isolation barrier spans the center of the package. PCB layout must maintain sufficient creepage and clearance between the primary-side pads and secondary-side pads, typically 4 mm to 8 mm depending on the working voltage and IEC 60664 pollution degree, which determines the keep-out region around the package on the board.
Related Guides
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
Why Buy from FindMyChip
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.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”