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STMicroelectronics TSC199A2IQT
- Part No.:
- TSC199A2IQT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFQFN
- Datasheet:
-
TSC199A2IQT.pdf
- Description:
- POA FOR VFQFPN 1.8X1.4X0.75 10L
- Quantity:
- Payment:
- Shipping:
Inventory:4,258
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Product details
Overview
TSC199A2IQT from STMicroelectronics is a zero-drift, high-precision current sense amplifier with 100 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. It operates from 2.7 V to 26 V supply and supports industrial temperature range (-40 °C to 125 °C), enabling accurate shunt-based current monitoring in battery chargers and telecom power rails.
For engineers reviewing the TSC199A2IQT datasheet, TSC199A2IQT pinout, TSC199A2IQT application, or TSC199A2IQT equivalent, key selection criteria include bidirectional sensing capability, low 0.5 µV/°C offset drift, SC70-6 and QFN10L (1.8 × 1.4 mm) package options, and compatibility with low-side/high-side configurations requiring <10 mV full-scale sensing resolution.
Technical Context
The TSC199A2IQT implements a chopper-stabilized zero-drift architecture to achieve ±150 µV RTI offset and 0.5 µV/°C drift over -40 °C to 125 °C, enabling stable precision measurement across wide temperature swings. Its input stage accepts common-mode voltages from -0.3 V to +26 V independent of supply voltage, supporting both high-side and low-side shunt placement.
With 100 V/V gain set by internal resistor network (R1 = 1 MΩ, R3/R4 = 10 kΩ), it delivers 40 kHz bandwidth and 0.32 V/µs slew rate into 100 pF load, while maintaining 120 dB CMRR and 0.01% linearity error over ±5 mV sense range - critical for closed-loop current feedback in power management ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - fixed-ratio amplification enabling direct conversion of 10 mV shunt drop to 1 V output for ADC interfacing. |
| Common-mode input range | -0.3 V to +26 V - supports bidirectional sensing and operation beyond supply rail, ideal for high-side current monitoring in 24 V systems. |
| Offset voltage (RTI) | ±150 µV max - ensures ≤0.15% full-scale error at 100 mV sense voltage, critical for sub-1% current measurement accuracy. |
| Gain error | ±1.5% max - guarantees consistent scaling across temperature and unit-to-unit variation without per-unit calibration. |
| Quiescent current | 100 µA max - enables integration into always-on battery monitoring paths with negligible standby power penalty. |
| Supply voltage range | 2.7 V to 26 V - allows single-supply operation across Li-ion, 12 V automotive, and 24 V industrial rails without external regulators. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood, base station, and industrial motor control environments. |
Pinout & Package
Available in SC70-6 (1.8 × 1.4 mm footprint) and QFN10L (1.8 × 1.4 × 0.5 mm, wettable flank), both RoHS-compliant ECOPACK® packages optimized for space-constrained power monitoring PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Reference voltage input | Accepts externally supplied reference (e.g., VCC/2) to set output common-mode level; floating default is VCC/2 internally. |
| GND | Ground reference | Primary return path for supply, inputs, and output; must be low-impedance connection to minimize noise coupling. |
| VCC | Positive supply | Power rail from 2.7 V to 26 V; supplies internal amplifier stages and bias networks. |
| VIN+ | Non-inverting input | Connects to high-potential side of shunt resistor; handles common-mode up to +26 V regardless of VCC. |
| VIN- | Inverting input | Connects to low-potential side of shunt; differential input accepts ±26 V swing relative to VIN+. |
| OUT | Amplified output | Delivers 100×(VIN+ − VIN−) referenced to REF; rail-to-rail swing (0.05 V to VCC − 0.2 V) supports 10 kΩ loads. |
| NC | No-connect terminal | Unused pins (SC70-6 Pin 1, QFN10 Pins 1 & 7); may be left floating or tied to GND/VCC per layout requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Chopper stabilization eliminates 1/f noise and thermal drift, enabling stable µV-level offset over full temperature range. |
| Bidirectional sensing support | Input common-mode range extends to -0.3 V allows shunt placement on either side of load, including ground-referenced configurations. |
| Low full-scale sensing threshold | 10 mV full-scale capability minimizes I²R loss in shunt resistors, improving system efficiency in high-current applications. |
| High CMRR | 120 dB minimum rejects noise from switching power supplies and adjacent high-dV/dt traces in dense PCB layouts. |
| Small-footprint packaging | QFN10L (1.8 × 1.4 mm) and SC70-6 enable integration into compact battery packs and telecom modules with minimal board area. |
Applications
| Battery Charger Monitoring | Telecom DC-DC Module Current Feedback |
|---|---|
|
Use Scenario: Real-time charge/discharge current tracking in multi-cell Li-ion battery packs with 2–4 A nominal current. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to scaled analog output for microcontroller ADC sampling. Use Value: ±150 µV offset ensures ≤0.15% error at 100 mV sense voltage, enabling precise state-of-charge estimation without calibration. |
Use Scenario: Output current regulation in 48 V telecom DC-DC converters delivering up to 20 A to baseband processing units. IC Role / Device Role / Timing Role: Low-side current monitor feeding analog feedback loop to PWM controller for tight current limit enforcement. Use Value: 100 V/V gain and 40 kHz bandwidth support fast transient response during burst-mode load changes. |
| Industrial Motor Drive Overcurrent Protection | Notebook System Power Rail Monitoring |
|
Use Scenario: Phase current detection in 24 V BLDC motor drives where overcurrent must trigger shutdown within 10 µs. IC Role / Device Role / Timing Role: High-speed current sense amplifier driving comparator input for hardware fault detection. Use Value: 0.32 V/µs slew rate and 40 kHz bandwidth ensure <5 µs propagation delay from sense event to valid output transition. |
Use Scenario: Dual-rail monitoring (CPU core, DDR memory) in ultrabooks with dynamic power budgets below 28 W. IC Role / Device Role / Timing Role: Precision current sensor feeding PMIC telemetry interface for adaptive power throttling. Use Value: 100 µA quiescent current avoids measurable impact on standby power, supporting >14-day battery shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | 50 V/V gain, 80 V/V max common-mode, ±10 µV offset, 2.7 V to 5.5 V supply only | Limited to low-voltage systems; lacks -0.3 V extended common-mode for bidirectional sensing | Select when supply is strictly ≤5.5 V and ultra-low offset (<±10 µV) is prioritized over wide common-mode range. |
| MAX40056ATA+T | 100 V/V gain, -0.1 V to 65 V common-mode, ±50 µV offset, 125 µA IQ, 1.8 V to 5.5 V supply | Higher common-mode range but narrower supply window; not suitable for 12–24 V standalone operation | Prefer for high-voltage (>40 V) systems with separate low-voltage bias rail; avoid if main supply exceeds 5.5 V. |
Compared with INA240A1IDR and MAX40056ATA+T, TSC199A2IQT uniquely supports 2.7–26 V single-supply operation with -0.3 V to 26 V common-mode - essential for self-powered, wide-input industrial and telecom current monitors without auxiliary rails.
Availability
TSC199A2IQT is available at Aetrix Electronics and suitable for battery chargers, telecom DC-DC modules, and industrial motor drives requiring stable component supply across extended temperature and voltage ranges.
Supply support for TSC199A2IQT 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TSC199 series belongs to ST's precision analog portfolio, engineered specifically for high-accuracy, low-power current sensing in energy-efficient power management systems where shunt-based measurement replaces invasive Hall-effect sensors.
FAQ
What is the maximum capacitive load the TSC199A2IQT output can drive without oscillation?
The TSC199A2IQT is stable with up to 470 pF capacitive load at the output, as specified in the Electrical Characteristics table. Exceeding this value may cause peaking or sustained oscillation due to phase margin degradation; for larger loads, add a series 10–50 Ω isolation resistor between OUT and the capacitor.
Can the TSC199A2IQT operate with a reference voltage other than VCC/2?
Yes - the REF pin accepts any DC voltage from -0.3 V to VCC+0.3 V, allowing user-defined output common-mode level. When left unconnected, internal circuitry defaults to VCC/2; tying REF to an external precision reference improves absolute output accuracy in ratiometric systems.
Is the TSC199A2IQT suitable for bidirectional current sensing in H-bridge motor control?
Yes - its -0.3 V to +26 V common-mode input range enables direct connection across shunt resistors placed on either side of the H-bridge, supporting true bidirectional measurement without level-shifting circuitry or dual-supply operation.
How does the zero-drift architecture affect long-term measurement stability?
The chopper-stabilized design actively cancels input offset and its drift over time and temperature, reducing 1/f noise and eliminating thermal hysteresis - resulting in <0.5 µV/°C offset drift and no observable drift over 1,000 hours of continuous operation at 125 °C.
TSC199A2IQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 10-WFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 0.32V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 40 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:
- 10-QFN (1.8x1.4)
TSC199A2IQT FAQ
1.How can I place an order for TSC199A2IQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC199A2IQT 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 TSC199A2IQT reliable?
The price and inventory of TSC199A2IQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC199A2IQT is usually 5 days.
3.What payment methods are accepted for TSC199A2IQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC199A2IQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC199A2IQT?
TSC199A2IQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC199A2IQT 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 TSC199A2IQT?
For technical support, including TSC199A2IQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC199A2IQT requirements.
6.How does Aetrix verify that TSC199A2IQT is sourced from the original manufacturer or authorized distributors?
All TSC199A2IQT 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 TSC199A2IQT meets industry standards.
7.What is the process for return or replacement of TSC199A2IQT?
All TSC199A2IQT units undergo pre-shipment inspection (PSI). If there is an issue with TSC199A2IQT, 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 TSC199A2IQT part is unused and in its original packaging.
Return procedure for TSC199A2IQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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