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STMicroelectronics TSC2021IST
- Part No.:
- TSC2021IST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSC2021IST.pdf
- Description:
- 100 V, PRECISION, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:1,971
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Product details
Overview
TSC2021IST from STMicroelectronics is a precision bidirectional current sense amplifier with fixed 50 V/V gain, -4 V to +100 V input common-mode voltage range, 100 dB minimum CMR, ±150 µV max offset voltage, and AEC-Q100 qualification for automotive-grade reliability. It enables accurate high-side/low-side shunt-based current measurement in 48 V battery management and motor control systems.
For engineers reviewing the TSC2021IST datasheet, TSC2021IST pinout, TSC2021IST application, or TSC2021IST equivalent, this device supports design of robust overcurrent protection, real-time current feedback loops, and PWM-noise-resilient sensing in harsh automotive and industrial power distribution environments.
Technical Context
The TSC2021IST employs a zero-drift topology with thin-film resistor networks to achieve stable 50 V/V gain (±0.3% error) and 3.5 ppm/°C gain drift across -40 °C to +125 °C. Its integrated PWM enhancer actively suppresses transients induced by fast common-mode edges-critical for motor drive and solenoid valve applications.
It operates from 2.7 V to 5.5 V supply, delivers 350–700 kHz small-signal bandwidth (depending on VCC), and maintains 0.01% linearity error over its full -4 V to +100 V common-mode range. Dual reference inputs (VREF1/VREF2) allow flexible output common-mode setting for unidirectional or bidirectional sensing configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed-enables precise 20 mV shunt drop detection at 1 A with 1 mΩ resistor. |
| Common-mode voltage range | -4 V to +100 V-supports direct high-side sensing in 48 V systems without level-shifting or protection circuitry. |
| CMR (DC) | ≥100 dB-rejects >99.999% of common-mode interference, critical for noisy motor drive buses. |
| Offset voltage (max) | ±150 µV RTI-limits current measurement error to ≤3 µA when using 50 mΩ shunt at 25 °C. |
| Supply voltage | 2.7 V to 5.5 V-compatible with standard 3.3 V and 5 V microcontroller I/O domains. |
| Operating temperature | -40 °C to +125 °C-fully specified for under-hood automotive and industrial power electronics. |
| AEC-Q100 grade | Grade 1 qualified-meets automotive reliability requirements for mission-critical current monitoring. |
Pinout & Package
Supplied in SO8 package (8-pin narrow-body, 1.27 mm pitch), the TSC2021IST features dual reference inputs for output common-mode control and dedicated IN+/IN- terminals for differential shunt sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN-) | Negative input | Connects to low-side of shunt resistor; referenced to system ground or negative rail. |
| 2 (GND) | Ground | Analog ground reference for internal circuitry; must be low-impedance connection to PCB ground plane. |
| 3 (VREF2) | Reference voltage 2 | Configures output common-mode voltage; tied to VCC or GND to set bidirectional/unidirectional operation. |
| 4 (NC) | No connect | Internally unused; leave floating or grounded per layout best practices. |
| 5 (OUT) | Output | Amplified, buffered current-sense signal; drives ADC input or comparator with 10 kΩ load capability. |
| 6 (VCC) | Supply voltage | 2.7–5.5 V analog supply; requires local 100 nF ceramic decoupling capacitor. |
| 7 (VREF1) | Reference voltage 1 | Second reference input; used with VREF2 to define output offset and polarity behavior. |
| 8 (IN+) | Positive input | Connects to high-side of shunt resistor; accepts up to +100 V common-mode potential. |
Key Features
| Feature | Design Value |
|---|---|
| PWM rejection enhancement | Detects and compensates for fast ∆V/∆t common-mode transients-reduces output disturbance during motor phase switching. |
| Zero-drift architecture | 0.5 µV/°C max offset drift-ensures <±10 µV total offset variation over full -40 °C to +125 °C range. |
| Dual reference inputs (VREF1/VREF2) | Supports programmable output common-mode: 0 V (unidirectional) or VCC/2 (bidirectional) via external resistor divider or direct tie-off. |
| High-frequency CMRR | ≥80 dB at 100 kHz-maintains accuracy even under high-frequency noise from DC-DC converters or inverters. |
| Low quiescent current | 1.7–2.4 mA-minimizes self-heating and enables use in always-on battery monitoring circuits. |
Applications
| Battery Management System | 48 V Power Distribution |
|---|---|
|
Use Scenario: Real-time cell stack current monitoring and charge/discharge balancing in 48 V mild-hybrid vehicle batteries. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier measuring shunt voltage with 50 V/V gain and 100 V common-mode tolerance. Use Value: Enables ±0.5% full-scale current accuracy over temperature without calibration, supporting ISO 26262 ASIL-B functional safety goals. |
Use Scenario: In-line current monitoring for fuseless 48 V distribution units in commercial vehicles and data center PSUs. IC Role / Device Role / Timing Role: High-side current sensor interfacing directly to 48 V bus with no external level shifters or protection diodes. Use Value: Eliminates need for isolated amplifiers or optocouplers-reducing BOM cost and board area while maintaining 100 dB CMR at DC and 100 kHz. |
| Motor Control | Automotive HVAC Blower |
|
Use Scenario: Phase current sensing in 48 V brushless DC motor drives for electric power steering and active suspension. IC Role / Device Role / Timing Role: PWM-enhanced current amplifier rejecting gate-drive-induced common-mode spikes during FET switching. Use Value: Reduces current measurement distortion during 20 ns edge transitions-enabling accurate field-oriented control (FOC) without software filtering. |
Use Scenario: Current feedback for closed-loop speed control of 48 V HVAC blower motors in premium passenger vehicles. IC Role / Device Role / Timing Role: Low-drift, AEC-Q100-qualified amplifier providing stable analog current signal to MCU ADC. Use Value: Maintains <±2 mA measurement accuracy over lifetime and temperature-supporting precise torque regulation and stall detection. |
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 | 20 V/V gain, 80 V common-mode, 120 dB CMR, higher quiescent current (2.4 mA vs. 2.3 mA) | Better CMR but narrower common-mode range; less suitable for >80 V systems like 100 V test fixtures | Select when ultra-high DC CMR is prioritized over wide common-mode coverage. |
| MAX40056ATA+T | 50 V/V gain, 65 V common-mode, 110 dB CMR, no VREF pins-fixed unidirectional output | Lacks bidirectional configuration flexibility; requires external op-amp for offset adjustment | Choose for cost-sensitive 48 V applications where bidirectional sensing is unnecessary. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the TSC2021IST uniquely combines 100 V common-mode tolerance, dual VREF configurability for bidirectional operation, and automotive-grade PWM rejection-making it optimal for next-generation 48 V–100 V high-reliability power systems.
Availability
TSC2021IST is available at Aetrix Electronics and suitable for battery management systems, 48 V power distribution units, and automotive motor control applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for TSC2021IST 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 automotive, industrial, and power management solutions, with broad analog portfolio and deep automotive qualification expertise.
The TSC202x series is designed specifically for high-accuracy, high-CMRR current sensing in 48 V–100 V automotive and industrial power systems-emphasizing PWM resilience, AEC-Q100 compliance, and zero-drift stability.
FAQ
What is the maximum shunt voltage the TSC2021IST can accurately measure?
The TSC2021IST supports a maximum differential input (Vsense) of 49.1 mV (typical) with ≤0.3% gain error across temperature. At 50 V/V gain, this corresponds to 2.455 V output swing-allowing precise measurement of shunt voltages up to ~49 mV, e.g., 490 A through a 100 µΩ shunt or 98 A through a 500 µΩ shunt.
How does the PWM enhancer function in the TSC2021IST?
The PWM enhancer detects rapid dV/dt events on the input common-mode bus and dynamically adjusts internal compensation to suppress transient-induced output errors. This reduces overshoot and settling time during motor phase-switching events, enabling clean current waveforms without post-processing filtering in FOC algorithms.
Can the TSC2021IST be used for unidirectional current sensing only?
Yes-by connecting VREF1 to VCC and VREF2 to GND (or vice versa), the output common-mode is fixed at VCC or GND, enabling unidirectional output swing. This simplifies interface to single-supply ADCs and eliminates need for AC-coupling or level-shifting in charge-only monitoring applications.
Is the TSC2021IST pin-compatible with other devices in the TSC202x family?
Yes-the TSC2020IST, TSC2021IST, and TSC2022IST share identical SO8 pinout, electrical interface, and reference pin functionality. Only the internal gain differs (20/50/100 V/V), allowing hardware reuse across designs with different shunt sizing and dynamic range requirements.
TSC2021IST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- TSC2021
- 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:
- Single-Ended
- Slew Rate:
- 2.8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 700 kHz
- Current - Input Bias:
- 200 µA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- 14.5 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MiniSO
TSC2021IST FAQ
1.How can I place an order for TSC2021IST through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2021IST 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 TSC2021IST reliable?
The price and inventory of TSC2021IST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2021IST is usually 5 days.
3.What payment methods are accepted for TSC2021IST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2021IST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2021IST?
TSC2021IST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2021IST 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 TSC2021IST?
For technical support, including TSC2021IST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2021IST requirements.
6.How does Aetrix verify that TSC2021IST is sourced from the original manufacturer or authorized distributors?
All TSC2021IST 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 TSC2021IST meets industry standards.
7.What is the process for return or replacement of TSC2021IST?
All TSC2021IST units undergo pre-shipment inspection (PSI). If there is an issue with TSC2021IST, 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 TSC2021IST part is unused and in its original packaging.
Return procedure for TSC2021IST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSC2021IST Tags
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