TMCS1101-Q1 - 1.5% Isolated Hall-Effect Current Sensor | TI
MPN: TMCS1101-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.89 | $18.90 |
| 100 | $1.62 | $162.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.15 | $1,150.00 |
Drop-in alternatives for TMCS1101-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TMCS1101A3UQDRQ1
β Drop-Inπ Reference alternative (not in catalog)
TMCS1101A1BQDRQ1
β Drop-Inπ Reference alternative (not in catalog)
TMCS1101A2UQDRQ1
β Drop-Inπ Reference alternative (not in catalog)
TMCS1101A3BQDR
β Drop-Inπ Reference alternative (not in catalog)
MCA1101-50-5
β‘ Same Packageπ Reference alternative (not in catalog)
TMCS1101-Q1 Maximum Ratings & Electrical Characteristics
| Sensor Type | Hall-Effect Isolated Current Sensor |
| Measurement Type | DC or AC, bidirectional and unidirectional variants |
| Accuracy | 1.5% (full range) |
| Isolation Type | Galvanic (basic isolation) |
| Working Isolation Voltage | +/-600 V |
| Rated Current (A3B variant) | 11.25 A |
| Supply Current (max) | 6 mA |
| Operating Temperature Range | -40C to +125C |
| Automotive Qualification | AEC-Q100 qualified |
| Package | 8-SOIC (0.154 inch, 3.90 mm width) |
| Mounting Type | Surface Mount |
| Output Type | Analog voltage output with internal reference |
| Linearity | Excellent linearity (proprietary linearization) [DATA_NEEDED: exact % linearity] |
| Isolation Barrier | Between pins 1-4 and pins 5-8 |
| Number of Channels | 1 |
| Bandwidth | [DATA_NEEDED: bandwidth] |
| RoHS Status | Compliant [DATA_NEEDED: confirm on TI page] |
TMCS1101-Q1 Pin Configuration
| Pin 1 | IP β Current input - positive current flows into this pin (high-voltage side) |
| Pin 2 | IP β Current input (internally connected conductor, high-voltage side) |
| Pin 3 | IP β Current input (internally connected conductor, high-voltage side) |
| Pin 4 | IP β Current input (internally connected conductor, high-voltage side) |
| Pin 5 | GND β Low-side ground reference |
| Pin 6 | VOUT β Analog output voltage proportional to sensed current |
| Pin 7 | NC β No connect (low-voltage side) |
| Pin 8 | VCC β Low-side supply, 3.0 V to 5.5 V [DATA_NEEDED: confirm exact range] |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TMCS1101-Q1 is suitable for 6 applications: Automotive Traction Inverter Phase Current Sensing, Onboard Charger and DC-DC Converter Current Monitoring, Industrial Motor Drives and Servo Drives, Solar Inverter and MPPT String Current Sensing, Battery Management Systems (BMS), AC/DC Power Supplies and Server PSU Monitoring.
Automotive Traction Inverter Phase Current Sensing
The TMCS1101-Q1 fits traction inverter phase-current monitoring because its AEC-Q100 qualification, +/-600 V working isolation, and 1.5% accuracy address both the safety barrier and control-loop accuracy needs of 400V/800V EV drivetrains. Placed in series with each motor phase, its analog output feeds the ADC inputs of a C2000 MCU such as TMS320F28003x for field-oriented control. The low 6 mA supply current and stability from -40C to +125C reduce calibration burden over the automotive temperature range.
Recommended
Onboard Charger and DC-DC Converter Current Monitoring
In OBC and high-voltage DC-DC stages, the TMCS1101-Q1 provides isolated current feedback across the +/-600 V basic isolation barrier required between the high-voltage battery bus and low-voltage control domain. Its 1.5% accuracy supports charging-current regulation and protection thresholds, while the internal reference removes an external reference IC from the isolated-side BOM. The 8-SOIC footprint keeps the sensing solution compact on dense power boards, and specified behavior to +125C covers under-hood thermal environments.
Recommended
Industrial Motor Drives and Servo Drives
Industrial variable-frequency and servo drives need accurate phase-current feedback for torque control plus galvanic isolation from grounded or high-voltage DC buses. The TMCS1101-Q1 delivers DC or AC measurement with excellent linearity, so sinusoidal motor currents are captured without gain compression, and proprietary linearization keeps sensitivity drift low across temperature. Its analog output connects directly to drive MCUs or a 10-bit I2C ADC like ADC101C021, and the SOIC-8 package fits existing shunt-amplifier footprints during drive redesigns.
Recommended
Solar Inverter and MPPT String Current Sensing
Solar string inverters require isolated DC current measurement on PV inputs where ground-referenced sensing is unsafe or non-compliant. The TMCS1101-Q1's +/-600 V working isolation covers typical 600V-class and marginally 1000V-system architectures with appropriate stacking, while 1.5% accuracy improves MPPT efficiency by reducing power-point tracking error. Specified operation across -40C to +125C matches outdoor inverter environments, and the low 6 mA consumption limits standby losses in residential string inverters.
Recommended
Battery Management Systems (BMS)
In high-voltage BMS packs, the TMCS1101-Q1 measures pack charge/discharge current across the isolation barrier feeding the battery-management IC domain. Its 1.5% accuracy and low drift support coulomb counting and overcurrent protection decisions, while AEC-Q100 qualification enables automotive 12V/48V/400V pack designs. The bidirectional variants natively handle charge and discharge current polarity, and the internal reference simplifies interfacing with battery monitors such as BQ79616 in the low-voltage domain.
Recommended
AC/DC Power Supplies and Server PSU Monitoring
Server and telecom power supplies use the TMCS1101-Q1 for isolated output-current telemetry and hot-swap protection on high-voltage primary or secondary rails. DC or AC measurement capability covers both PFC-stage and output-stage monitoring with one device family, and the analog output feeds supervisory ADCs for power telemetry reporting. The compact 8-SOIC package and 6 mA supply current suit high-density PSU designs, while +/-600 V working isolation supports offline topology creepage requirements.
Recommended
Recommended Products Summary
Engineering reference data for TMCS1101-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMCS1101A3UQDRQ1 | TMCS1101A1BQDRQ1 | TMCS1101A2UQDRQ1 | TMCS1101A3BQDR | MCA1101-50-5 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | SOIC-8 (verify pinout) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | ACEINNA |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Not qualified (standard) | [DATA_NEEDED] |
| Sensing Polarity | Bidirectional (B variant) | Unidirectional | Bidirectional | Unidirectional | Bidirectional | Bidirectional |
| Accuracy | 1.5% | 1.5% | 1.5% | 1.5% | 1.5% | [DATA_NEEDED] |
| Working Isolation Voltage | +/-600 V basic | +/-600 V basic | +/-600 V basic | +/-600 V basic | +/-600 V basic | [DATA_NEEDED] |
| Supply Current (max) | 6 mA | 6 mA | 6 mA | 6 mA | 6 mA | [DATA_NEEDED] |
| Rated/Full-Scale Current | 11.25 A (A3B variant) | A3 unidirectional range | A1 bidirectional range | A2 unidirectional range | Same range as A3B | 50 A (per naming) |
| Internal Reference | Yes | Yes | Yes | Yes | Yes | [DATA_NEEDED] |
Key Differentiators
- True galvanic isolation with internal reference (vs INA240A1QPWRQ1)
- Automotive qualification maintained across family (vs TMCS1101A3BQDR)
- 6 mA maximum supply current (vs MCA1101-50-5)
Design Notes
The high-voltage side (pins 1-4) and low-voltage side (pins 5-8) must maintain creepage and clearance per your isolation requirement for +/-600 V working voltage. Keep the low-side VOUT trace short and route it away from the primary conductor plane; the isolation barrier in the PCB layout should not be bridged by solder mask exceptions or silkscreen on the primary side.
The analog VOUT output should be filtered before the ADC to limit noise bandwidth: a simple RC (e.g., 100 ohm + 1 nF) placed close to the ADC input preserves the sensor bandwidth while suppressing switching-noise coupling in motor-drive environments. Per TI datasheet guidance, decouple VCC with 0.1 uF plus 1 uF ceramics placed within 2 mm of pin 8.
Selecting an oversized sensitivity variant wastes ADC resolution: a bidirectional variant centered at mid-scale gives half the unidirectional range, so verify your expected current polarity before choosing U vs B. Also remember polarity convention: positive current flows into pin 1. Mismatched variant selection is the most common cause of clipped outputs during inverter transients.
Compliance Information
AEC-Q100 qualified per TI datasheet title. RoHS/lead-free per standard TI catalog offering - verify on TI product page for the specific ordering part number.
