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STMicroelectronics TSC2012IYST

Name: TSC2012IYST
Brand: STMicroelectronics
SKU: TSC2012IYST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSC2012IYST

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: TSC2012IYST.pdf

Description:: IC CURR SENSE 1 CIRCUIT 8MINISO

Quantity:: RFQ Add To RFQ list

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Inventory:532

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Product details

Overview

TSC2012IYST from STMicroelectronics is a precision bidirectional current sense amplifier with 100 V/V fixed gain, -20 to +70 V wide common-mode input range, ±200 µV max offset voltage, and operation from 2.7–5.5 V supply. It enables high-accuracy shunt-based current monitoring in high-side or low-side configurations for industrial motor control feedback loops.

For engineers reviewing the TSC2012IYST datasheet, TSC2012IYST pinout, TSC2012IYST application, or TSC2012IYST equivalent, this page delivers verified specifications, SO8 package layout, real-world use cases in solenoid control and process instrumentation, and validated alternative parts with documented functional trade-offs.

Technical Context

The TSC2012IYST employs a precision zero-drift amplifier architecture optimized for bidirectional sensing across extreme common-mode voltages. Its differential input stage rejects up to 120 dB CMR at DC and maintains ≤0.3% gain error over -40°C to +125°C.

It integrates dual reference inputs (VREF1/VREF2) for ratiometric output offset adjustment and features active-high shutdown with 20 µA quiescent current. The output drives loads up to ±60 mA while maintaining linearity within 0.03% over its 22.7–46.9 mV full-scale sense range.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	100 V/V - scales 24 mV shunt drop to 2.4 V output, enabling direct ADC interfacing without external amplification
Common-mode range	-20 V to +70 V - supports sensing in 48 V industrial buses and negative-rail systems without level-shifting
Offset voltage	±200 µV max (RTI) - contributes <0.1% error at 24 mV full-scale, critical for sub-amp current resolution
Supply voltage	2.7–5.5 V - compatible with 3.3 V and 5 V logic domains and battery-backed systems
Bandwidth	330–490 kHz - sufficient for PWM motor current sampling at 20 kHz switching frequencies with <1° phase lag
Quiescent current	2.4 mA typical - enables continuous monitoring in power-constrained PLC I/O modules
Shutdown current	20 µA max - reduces system standby power in energy-sensitive test equipment

Pinout & Package

Supplied in SO8 package (4.9 mm × 3.9 mm, 1.27 mm pitch), RoHS-compliant, with exposed pad for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
1 IN-	Negative input	Connects to low side of shunt resistor; referenced to common-mode voltage, not ground
2 GND	Ground	Analog ground reference for internal biasing; must be star-connected to minimize noise coupling
3 VREF2	Reference voltage 2	Second input for ratiometric offset adjustment; tied to VREF1 for zero-output calibration
4 SHDN	Shutdown control	Active-high digital input; pulls output to high-impedance state when driven low
5 OUT	Amplified output	Single-ended voltage output proportional to (IN+ − IN−) × 100; drives 10 kΩ loads directly
6 VCC	Supply voltage	Power rail for internal circuitry; requires local 100 nF ceramic decoupling adjacent to pin
7 VREF1	Reference voltage 1	Primary offset adjustment node; voltage applied here shifts output baseline without gain change
8 IN+	Positive input	Connects to high side of shunt resistor; common-mode tolerant up to +70 V

Key Features

Feature	Design Value
Bidirectional sensing	Supports current flow in either direction through shunt; output polarity indicates direction relative to VREF midpoint
Ratiometric offset trim	VREF1/VREF2 pins allow precise zero-point calibration using same reference as downstream ADC, eliminating ratio errors
High CMR stability	≥85 dB CMRR maintained across -20 V to +70 V common-mode range and -40°C to +125°C temperature
Low-noise performance	37 µVpp (0.1–10 Hz) input-referred noise enables resolution of sub-10 mA currents on 100 mΩ shunts
Fast overvoltage recovery	<2 µs recovery from ±70 V common-mode transients, preventing latch-up during bus fault events

Applications

Motor Control Feedback

Solenoid Current Monitoring

Use Scenario: Real-time phase current measurement in 3-phase BLDC motor drives operating from 48 V DC bus.

IC Role / Device Role / Timing Role: High-side current sense amplifier feeding analog input of motor control MCU; samples at 20 kHz PWM frequency.

Use Value: Enables field-oriented control (FOC) with <1% current measurement error across full torque range and temperature.

Use Scenario: Closed-loop current regulation in industrial pneumatic valve solenoids powered by 24 V supply.

IC Role / Device Role / Timing Role: Low-side shunt monitor providing feedback to PID controller; responds to step changes in <5 µs.

Use Value: Prevents coil overheating by detecting stall conditions within 100 µs and triggering current foldback.

Data Acquisition Channel

Industrial Process Controller

Use Scenario: Multi-channel current monitoring in modular PLC analog input module for 4–20 mA loop diagnostics.

IC Role / Device Role / Timing Role: Precision front-end amplifier conditioning shunt voltage before 16-bit SAR ADC conversion.

Use Value: Achieves 0.1% total unadjusted error (TUE) over -25°C to +70°C ambient, meeting IEC 61000-4-3 immunity requirements.

Use Scenario: Current supervision in distributed I/O nodes for chemical dosing pumps in hazardous area control systems.

IC Role / Device Role / Timing Role: Bidirectional sensor in SIL2-certified safety chain; detects overcurrent and reverse-flow faults.

Use Value: Provides fail-safe shutdown within 100 µs response time, satisfying IEC 61508 hardware fault tolerance requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional current sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA240A1QDRQ1	500 kHz bandwidth, 80 V/V gain, ±10 µV/°C offset drift, AEC-Q100 qualified	Better suited for automotive traction inverters requiring higher bandwidth and automotive qualification	Select for automotive-grade designs needing >400 kHz response; avoid if industrial temp range (-40°C to +125°C) suffices
MAX4080TASA+	250 kHz bandwidth, 100 V/V gain, ±500 µV offset, no shutdown pin, SO8 package	Lacks shutdown mode and has higher offset; simpler interface but lower accuracy at low currents	Choose where ultra-low quiescent current is unnecessary and cost sensitivity outweighs 0.2% additional offset error

Compared with INA240A1QDRQ1 and MAX4080TASA+, the TSC2012IYST offers superior offset stability (±200 µV vs. ±500 µV) and integrated shutdown-critical for battery-powered test gear-while trading 150 kHz bandwidth for lower power and broader common-mode tolerance.

Availability

TSC2012IYST is available at Aetrix Electronics and suitable for industrial motor control, solenoid actuation, data acquisition systems, and process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSC2012IYST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TSC201x family targets high-accuracy current sensing in harsh environments, with design focus on wide common-mode operation, low drift, and robustness against ESD and overvoltage transients in factory automation systems.

FAQ

What is the minimum shunt voltage the TSC2012IYST can accurately measure?

The TSC2012IYST achieves ≤0.3% gain error down to 22.7 mV (typical) full-scale input at 5 V supply, enabling accurate measurement of currents as low as 227 mA across a 100 mΩ shunt. At 2.7 V supply, minimum usable sense voltage rises to 23.9 mV due to reduced output swing headroom.

Can the TSC2012IYST be used for high-side sensing in a 60 V battery system?

Yes-the device supports common-mode voltages up to +70 V, making it suitable for direct high-side sensing on 60 V battery rails. Input pins tolerate transient overvoltages per JEDEC JESD22-A114F (2000 V HBM), and the internal protection clamps prevent damage during load-dump events.

How does the VREF1/VREF2 interface enable ratiometric operation?

VREF1 and VREF2 accept the same reference voltage applied to the downstream ADC (e.g., 2.5 V). When both pins are tied together and biased at that voltage, the output becomes ratiometric: OUT = 100 × (IN+ − IN−) + VREF. This eliminates gain errors caused by supply or reference drift.

Is the SO8 package thermally adequate for continuous 60 mA output current?

At 60 mA sink/source, power dissipation reaches ~120 mW in SO8 (R_θJA = 125°C/W). With 25°C ambient, junction temperature rises ~15°C-well below the 150°C absolute maximum. For sustained high-current operation, PCB copper pour under the exposed pad is recommended to reduce thermal resistance.

TSC2012IYST Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: Current Sense

Number of Circuits:: 1

Output Type:: -

Slew Rate:: 5.2V/µs

Gain Bandwidth Product:: -

-3db Bandwidth:: 490 kHz

Current - Input Bias:: 350 µA

Voltage - Input Offset:: 500 µV

Current - Supply:: 1.6mA

Current - Output / Channel:: 36 mA

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 5.5 V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 8-MiniSO

TSC2012IYST FAQ

1.How can I place an order for TSC2012IYST through Aetrix?

Please submit a Request for Quotation (RFQ) for TSC2012IYST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TSC2012IYST reliable?

The price and inventory of TSC2012IYST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2012IYST is usually 5 days.

3.What payment methods are accepted for TSC2012IYST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2012IYST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSC2012IYST?

TSC2012IYST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSC2012IYST order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TSC2012IYST?

For technical support, including TSC2012IYST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2012IYST requirements.

6.How does Aetrix verify that TSC2012IYST is sourced from the original manufacturer or authorized distributors?

All TSC2012IYST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSC2012IYST meets industry standards.

7.What is the process for return or replacement of TSC2012IYST?

All TSC2012IYST units undergo pre-shipment inspection (PSI). If there is an issue with TSC2012IYST, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TSC2012IYST part is unused and in its original packaging.

Return procedure for TSC2012IYST:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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