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STMicroelectronics TSC199A3ICT
- Part No.:
- TSC199A3ICT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
TSC199A3ICT.pdf
- Description:
- SOT 323 6LDS
- Quantity:
- Payment:
- Shipping:
Inventory:3,599
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Product details
Overview
TSC199A3ICT from STMicroelectronics is a zero-drift, high-precision current sense amplifier with 200 V/V fixed gain, -0.3 V to 26 V common-mode input range, ±150 µV max offset voltage, 1.5% max gain error, and 100 µA max quiescent current-designed for bidirectional current monitoring in battery chargers and industrial power management systems.
For engineers reviewing the TSC199A3ICT datasheet, TSC199A3ICT pinout, TSC199A3ICT application, or TSC199A3ICT equivalent, key selection criteria include its wide common-mode range, low offset drift (0.5 µV/°C), SC70-6 and QFN10 package options, and suitability for high-accuracy shunt-based current sensing at ≤10 mV full-scale differential voltage.
Technical Context
The TSC199A3ICT employs a chopper-stabilized zero-drift architecture to achieve <0.5 µV/°C offset drift and 120 dB CMRR across -40 °C to 125 °C, enabling stable measurement under thermal stress. Its input stage operates rail-to-rail on common-mode voltage while maintaining precision at supply voltages from 2.7 V to 26 V.
It delivers 25 kHz bandwidth and 0.2 V/µs slew rate with 40 nV/√Hz input-referred noise, optimized for low-voltage, high-gain current sensing where signal integrity must be preserved despite large common-mode transients in telecom and notebook power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - enables accurate amplification of sub-10 mV shunt voltage drops to usable output levels |
| Common-mode range | -0.3 V to +26 V - supports high-side, low-side, and bidirectional sensing regardless of supply rail |
| Offset voltage (max) | ±150 µV - ensures ≤0.75% error at 20 mV input, critical for precision battery charge control |
| Gain error (max) | ±1.5% - guarantees consistent scaling across temperature and unit-to-unit variation |
| Quiescent current (max) | 100 µA - allows integration into always-on power monitoring circuits without significant overhead |
| Operating temperature | -40 °C to +125 °C - meets industrial and automotive under-hood ambient requirements |
| Bandwidth | 25 kHz - sufficient for DC–10 kHz current loop feedback and overcurrent fault detection |
Pinout & Package
Available in SC70-6 (1.8 × 1.4 mm) and QFN10L (1.8 × 1.4 × 0.5 mm) packages; both RoHS-compliant ECOPACK® variants with exposed thermal pad (QFN10 only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Reference voltage input | Accepts external reference (e.g., VCC/2) to set output common-mode level; supports ratiometric or absolute output scaling |
| GND | Ground connection | Primary return path for supply, inputs, and output; requires low-impedance PCB plane for noise immunity |
| VCC | Positive supply input | Supports 2.7–26 V operation; decoupling capacitor mandatory near pin for stability |
| VIN+ | High-side sense node | Connects to shunt resistor's high-potential side; tolerates up to 26 V above GND |
| VIN- | Low-side sense node | Connects to shunt resistor's low-potential side; enables bidirectional current polarity detection |
| OUT | Differential output | Single-ended output referenced to REF; swings within 0.05 V of GND and 0.2 V below VCC |
| NC | No-connect terminal | Internally unused; may be left floating, tied to GND, or connected to VCC per layout needs |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Chopper stabilization reduces offset drift to ≤0.5 µV/°C-enables stable long-term current monitoring without recalibration |
| Wide common-mode input | -0.3 V to +26 V operation independent of supply voltage-supports direct high-side sensing in 24 V industrial buses |
| Low full-scale sensing threshold | 10 mV full-scale differential input-minimizes I²R loss in shunt resistors while preserving accuracy |
| High CMRR | 120 dB minimum-rejects noise from switching regulators and motor drives during precision current capture |
| Low-power operation | 100 µA max ICC-enables continuous current monitoring in energy-sensitive portable and battery-powered systems |
Applications
| Battery Charger Monitoring | Industrial Power Supply Feedback |
|---|---|
|
Use Scenario: Real-time charging current measurement in multi-cell Li-ion fast-charging systems with 12–24 V input rails. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for ADC sampling and charge algorithm control. Use Value: Enables ±1% current accuracy across temperature, supporting JEITA-compliant thermal charge profiling and end-of-charge termination. |
Use Scenario: Output current regulation in programmable 0–30 V, 0–5 A bench power supplies used in factory test equipment. IC Role / Device Role / Timing Role: Precision current monitor feeding analog feedback loop to maintain constant-current mode during load transients. Use Value: Delivers 25 kHz bandwidth and 0.2 V/µs slew rate to track rapid load steps without overshoot or delay-induced instability. |
| Telecom DC-DC Module Protection | Notebook System Power Rail Monitoring |
|
Use Scenario: Overcurrent detection in 48 V intermediate bus converters supplying PoE++ and baseband processors. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier detecting reverse current during hot-swap events and forward overload faults. Use Value: -0.3 V to +26 V common-mode range accommodates negative-going transients during hot-plug insertion without saturation or latch-up. |
Use Scenario: Core voltage rail current monitoring in ultrabook platforms with dynamic CPU/GPU power states. IC Role / Device Role / Timing Role: Low-quiescent-current sense amplifier providing real-time current telemetry to system controller via ADC interface. Use Value: 100 µA max ICC minimizes impact on always-on subsystem power budget while delivering ±150 µV offset for sub-amp accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3IDR | 200 V/V gain, 85 dB CMRR, 125 µA IQ, SOIC-8 package | Larger footprint; lower CMRR limits noise rejection in noisy 48 V telecom environments | Prefer when board space allows SOIC and cost sensitivity outweighs CMRR requirement |
| MAX4080TASA+ | 200 V/V gain, 100 dB CMRR, 120 µA IQ, 8-pin µMAX package | Higher offset (±200 µV) and drift (1 µV/°C); no REF pin for flexible output biasing | Choose when REF-independent output simplifies design but ±0.1% additional offset is acceptable |
Compared with INA240A3IDR and MAX4080TASA+, the TSC199A3ICT offers superior CMRR (120 dB vs. ≤100 dB), lower offset drift (0.5 µV/°C vs. ≥1 µV/°C), and REF pin flexibility-making it optimal for high-accuracy, thermally demanding, and compact industrial current sensing.
Availability
TSC199A3ICT is available at Aetrix Electronics and suitable for battery chargers, industrial power supplies, telecom DC-DC modules, and notebook power rail monitoring requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TSC199A3ICT 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 headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power management devices, and MEMS sensors for industrial, automotive, and consumer markets.
The TSC199 series belongs to ST's precision analog portfolio, engineered specifically for high-accuracy, low-drift current sensing in power-constrained and thermally variable environments-from battery-powered portables to factory automation systems.
FAQ
What is the maximum common-mode voltage the TSC199A3ICT can handle?
The TSC199A3ICT supports a common-mode input voltage range of -0.3 V to +26 V, independent of supply voltage. This allows direct high-side sensing in 24 V industrial buses and accommodates negative transients during hot-swap events without saturation or damage.
Does the TSC199A3ICT require an external reference voltage?
No-the REF pin accepts an optional external reference (e.g., VCC/2) to set output common-mode level, but the device operates fully functional with REF tied to VCC/2 internally or left unconnected in basic configurations. Default operation uses internal biasing.
Can the TSC199A3ICT be used for bidirectional current sensing?
Yes-its symmetric input structure (VIN+ and VIN-) and rail-to-rail common-mode capability enable true bidirectional sensing. Polarity is determined by which input connects to the higher potential side of the shunt resistor, with output polarity indicating current direction.
What package options are available for the TSC199A3ICT?
The TSC199A3ICT is offered in two RoHS-compliant packages: SC70-6 (1.8 × 1.4 mm) and QFN10L (1.8 × 1.4 × 0.5 mm) with exposed thermal pad. Both support tape-and-reel delivery and are qualified for industrial temperature operation (-40 °C to +125 °C).
TSC199A3ICT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 25 kHz
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 65µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
TSC199A3ICT FAQ
1.How can I place an order for TSC199A3ICT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC199A3ICT 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 TSC199A3ICT reliable?
The price and inventory of TSC199A3ICT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC199A3ICT is usually 5 days.
3.What payment methods are accepted for TSC199A3ICT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC199A3ICT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC199A3ICT?
TSC199A3ICT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC199A3ICT 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 TSC199A3ICT?
For technical support, including TSC199A3ICT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC199A3ICT requirements.
6.How does Aetrix verify that TSC199A3ICT is sourced from the original manufacturer or authorized distributors?
All TSC199A3ICT 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 TSC199A3ICT meets industry standards.
7.What is the process for return or replacement of TSC199A3ICT?
All TSC199A3ICT units undergo pre-shipment inspection (PSI). If there is an issue with TSC199A3ICT, 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 TSC199A3ICT part is unused and in its original packaging.
Return procedure for TSC199A3ICT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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