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STMicroelectronics TSC2020IST
- Part No.:
- TSC2020IST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSC2020IST.pdf
- Description:
- MSOP/TSSOP 8 BODY3.00 PITCH0.65
- Quantity:
- Payment:
- Shipping:
Inventory:6,868
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Product details
Overview
TSC2020IST from STMicroelectronics is a precision bidirectional current sense amplifier with fixed 20 V/V gain, -4 to +100 V input common-mode voltage range, 100 dB minimum CMR, ±150 µV max offset voltage, and AEC-Q100 qualification for automotive use. It operates from 2.7–5.5 V supply and supports high-side/low-side sensing in 48 V battery management and motor control systems.
For engineers reviewing the TSC2020IST datasheet, TSC2020IST pinout, TSC2020IST application, or TSC2020IST equivalent, this device delivers verified DC accuracy, enhanced PWM rejection, stable gain error (≤0.3%), and thermal drift performance (0.5 µV/°C offset drift) across -40 °C to +125 °C - critical for real-time current monitoring in safety-critical power distribution.
Technical Context
The TSC2020IST uses a zero-drift topology with thin-film resistors to achieve 100 dB CMRR and <0.01% linearity error over -4 V to +100 V common-mode range. Its internal PWM enhancer detects fast ∆V/∆t transients on the input bus to suppress output disturbance during switching events in motor drives or solenoid control.
It features dual reference inputs (VREF1/VREF2) enabling flexible output common-mode setting for unidirectional or bidirectional current measurement, and maintains 350–450 kHz small-signal bandwidth across full supply (2.7–5.5 V) and temperature (-40 to +125 °C) ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - fixed ratio enables direct shunt voltage-to-current scaling without external gain-setting components. |
| Common-mode voltage range | -4 V to +100 V - supports high-side sensing in 48 V systems and low-side sensing with negative rail margin. |
| Offset voltage (max) | ±150 µV - ensures ≤7.5 mV total error at 20× gain for 100 mV shunt drop, critical for sub-amp precision. |
| CMR (min) | 100 dB - rejects >99.99% of common-mode noise at DC, preserving signal integrity in noisy 48 V power domains. |
| Supply voltage | 2.7–5.5 V - compatible with standard 3.3 V and 5 V microcontroller I/O rails and ADC references. |
| Operating temperature | -40 °C to +125 °C - meets automotive under-hood and industrial embedded requirements with full spec guarantee. |
| Gain error (max) | 0.3% - limits full-scale current measurement error to ±0.3%, enabling accurate overcurrent protection thresholds. |
Pinout & Package
Available in SO8, MiniSO8, and TSSOP8 packages; all share identical pin mapping per datasheet DS14393 Rev 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Positive differential input | Connects to high-side of shunt resistor; tolerates up to +100 V common-mode voltage. |
| IN- | Negative differential input | Connects to low-side of shunt; supports -4 V common-mode, enabling true bidirectional sensing. |
| GND | Analog ground reference | System ground return for internal circuitry; separate from power ground in layout-sensitive designs. |
| VCC | Supply voltage input | 2.7–5.5 V analog supply; powers internal amplifiers and PWM enhancer block. |
| OUT | Amplified output | Single-ended output referenced to GND; drives ADC inputs or comparator thresholds directly. |
| VREF1 / VREF2 | Reference voltage inputs | Set output common-mode level; connecting one to VCC and one to GND yields VCC/2 output center point. |
| NC | No connect | Pin 4 in SO8/MiniSO8 (Pin 1 in TSSOP8); must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced PWM rejection | Dedicated transient detection circuit suppresses output disturbance during fast common-mode edges (e.g., MOSFET switching), reducing measurement jitter in motor phase current sensing. |
| AEC-Q100 qualified | Grade 1 (-40 °C to +125 °C) qualification confirms reliability for automotive powertrain and body electronics applications. |
| Zero-drift architecture | Eliminates 1/f noise and minimizes thermal drift, delivering ±150 µV offset and 0.5 µV/°C drift over full temperature range. |
| Flexible output biasing | Dual VREF pins allow precise setting of output common-mode voltage, supporting both unidirectional (0–VCC) and bidirectional (±VCC/2) current measurement modes. |
| High-frequency CMRR stability | Maintains ≥80 dB CMRR up to 100 kHz (Fig. 44), ensuring robustness against high-speed switching noise in 48 V DC-DC converters. |
Applications
| Battery Management System (BMS) | 48 V Power Distribution Unit (PDU) |
|---|---|
|
Use Scenario: Real-time cell-string current monitoring and charge/discharge balancing in 12S–16S lithium-ion packs. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier measuring shunt voltage with ±150 µV offset to resolve sub-100 mA currents at 48 V bus. Use Value: Enables <1% full-scale current accuracy over -40 °C to +85 °C, supporting ISO 26262 ASIL-B functional safety diagnostics. |
Use Scenario: Branch-level current monitoring in vehicle 48 V PDU for load shedding and fault isolation. IC Role / Device Role / Timing Role: High-side current sensor interfacing to MCU ADC with 20 V/V gain and 100 dB CMR to reject bus ripple. Use Value: Delivers stable 350 kHz bandwidth and <0.3% gain error, allowing accurate RMS current calculation for thermal derating algorithms. |
| Automotive Motor Control | Industrial 48 V Power Tools |
|
Use Scenario: Phase current feedback in 48 V BLDC motor drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: PWM-enhanced current amplifier rejecting gate-drive-induced common-mode transients during PWM dead-time. Use Value: Reduces current measurement error to <0.5% during 20 kHz PWM switching, improving torque ripple and efficiency. |
Use Scenario: Battery pack current monitoring and overload protection in cordless 48 V drills and impact drivers. IC Role / Device Role / Timing Role: Low-drift (0.5 µV/°C) current sensor operating from 2.7 V supply, compatible with integrated battery monitor ICs. Use Value: Maintains ±150 µV offset across -20 °C to +70 °C ambient, enabling accurate state-of-charge estimation under variable load conditions. |
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, -5 to 80 V common-mode, 120 dB CMR, but higher 250 µV offset and no integrated PWM enhancer. | Preferred for ultra-high CMRR needs in low-noise lab equipment; less suited for noisy motor drive environments. | Select when absolute CMRR >110 dB is required and PWM rejection is handled externally. |
| TSC2021IST | 50 V/V gain, identical package/pinout, same -4 to +100 V common-mode and AEC-Q100 rating. | Used where higher gain is needed for smaller shunt resistors (e.g., 5 mΩ instead of 10 mΩ) to reduce power loss. | Drop-in replacement if system requires higher sensitivity without changing PCB layout or reference network. |
Compared with INA240A1QDRQ1, TSC2020IST offers superior PWM transient immunity and lower offset drift; compared with TSC2021IST, it provides lower gain for improved dynamic range in high-current applications while sharing identical footprint and qualification.
Availability
TSC2020IST 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 with AEC-Q100 assurance and long-term industrial lifecycle support.
Supply support for TSC2020IST 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 automotive-grade manufacturing capability.
The TSC202x series is part of ST's precision current sensing product line, designed specifically for high-accuracy, high-CMRR bidirectional current measurement in 48 V automotive and industrial systems.
FAQ
What is the maximum shunt voltage the TSC2020IST can accurately measure?
The TSC2020IST supports a maximum shunt voltage (Vsense) of 238.2 mV at VCC = 5 V while maintaining ≤0.3% gain error, corresponding to 11.91 mA through a 20 mΩ shunt. At VCC = 2.7 V, the limit is 123.6 mV (6.18 mA). These values ensure full-scale accuracy across the specified temperature range.
How does the PWM enhancer function in the TSC2020IST?
The PWM enhancer is an internal circuit that detects rapid ∆V/∆t on the input common-mode bus and dynamically adjusts internal compensation to suppress resulting output transients. It reduces measurement error during MOSFET switching events in motor control, with validated recovery in <7 µs for 48 V step changes (Fig. 39–40).
Can the TSC2020IST be used for unidirectional current sensing only?
Yes - by connecting VREF1 to VCC and VREF2 to GND, the output common-mode is set to VCC/2, enabling unidirectional operation where OUT swings from ~0.1 V to VCC–0.1 V for positive current only. The device retains full accuracy and bandwidth in this configuration.
What thermal resistance values apply to the TSC2020IST in SO8 package?
In SO8 package, the TSC2020IST has RTHJA = 125 °C/W (junction-to-ambient, typical) and RTHJC = 45 °C/W (junction-to-case, per JEDEC JESD51-14). At 2.3 mA supply current and 100 mW dissipation, junction temperature rise remains <12 °C above ambient at 25 °C with standard PCB copper area.
TSC2020IST 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:
- Single-Ended
- Slew Rate:
- 2V/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MiniSO
TSC2020IST FAQ
1.How can I place an order for TSC2020IST through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2020IST 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 TSC2020IST reliable?
The price and inventory of TSC2020IST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2020IST is usually 5 days.
3.What payment methods are accepted for TSC2020IST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2020IST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2020IST?
TSC2020IST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2020IST 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 TSC2020IST?
For technical support, including TSC2020IST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2020IST requirements.
6.How does Aetrix verify that TSC2020IST is sourced from the original manufacturer or authorized distributors?
All TSC2020IST 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 TSC2020IST meets industry standards.
7.What is the process for return or replacement of TSC2020IST?
All TSC2020IST units undergo pre-shipment inspection (PSI). If there is an issue with TSC2020IST, 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 TSC2020IST part is unused and in its original packaging.
Return procedure for TSC2020IST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSC2020IST Tags
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