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STMicroelectronics TSC888AILT
- Part No.:
- TSC888AILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSC888AILT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:23,332
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Product details
Overview
TSC888AILT from STMicroelectronics is a high-side current sense amplifier with fixed 20 V/V gain, operating over 2.8 V to 24 V input common-mode voltage and 4 V to 24 V supply range, consuming ≤1 mA quiescent current in SOT23-5 package-used for precision current monitoring in server SMPS and solar charge controllers.
For engineers reviewing the TSC888AILT datasheet, TSC888AILT pinout, TSC888AILT application, or TSC888AILT equivalent, key selection criteria include its independent common-mode/supply rails, ±6% total output accuracy, 95 dB CMR/SVR, buffered rail-to-rail output, and compatibility with shunt-based high-side sensing at voltages exceeding VCC.
Technical Context
The TSC888AILT implements a precision differential-input, single-ended-output architecture optimized for high-side shunt measurement. Its input stage operates independently of VCC, enabling sensing of 3.3 V/5 V/12 V power rails while powered from a 5 Vsb standby supply.
It features internally trimmed gain (20 V/V), rail-to-rail buffered output capable of sourcing/sinking 2 mA, and maintains 95 dB common-mode and supply rejection across full operating temperature (−40°C to +85°C) and supply (4–24 V) ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - fixed internal ratio; eliminates external gain-setting resistors and associated drift errors. |
| Common-mode range | 2.8 V to 24 V - enables direct sensing on high-voltage rails (e.g., 12 V server bus) independent of VCC. |
| Supply range | 4 V to 24 V - supports flexible biasing: VCC tied to Vp (simplified layout) or to low-voltage auxiliary rail (e.g., 5 Vsb). |
| Quiescent current | ≤1 mA - minimizes self-heating and system standby power loss in battery-backed or energy-sensitive designs. |
| Output accuracy | ±6% total error - includes gain error, offset, and linearity; sufficient for overcurrent protection and load regulation feedback. |
| CMRR / PSRR | 95 dB - suppresses noise from noisy power domains (e.g., switching node coupling) without additional filtering. |
Pinout & Package
SOT23-5 plastic package (ECOPACK® compliant, lead-free, JEDEC-standard footprint; thermal resistance RthJA = 250 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vp | Analog input (+) | High-side shunt connection point; current enters shunt here; withstands up to 30 V relative to GND. |
| Vm | Analog input (−) | Low-side shunt connection; current exits here; common-mode voltage referenced to this node. |
| Gnd | Power ground | Reference for output voltage and internal circuitry; must be connected to system power ground. |
| Vcc | Positive supply | Independent bias rail (4–24 V); may be tied to Vp for single-supply simplicity or isolated for noise immunity. |
| Out | Analog output | Buffered, ground-referenced voltage = 20 × (Vp − Vm); drives 1 mA load with <100 mV saturation at low state. |
Key Features
| Feature | Design Value |
|---|---|
| Independent VCM/VCC | Enables high-side sensing on 12 V rail while powered from 5 Vsb-eliminates level-shifting ICs or isolated supplies. |
| Fixed 20 V/V gain | Guarantees stable gain without external resistor tolerance or temperature drift; reduces BOM count and layout sensitivity. |
| Buffered rail-to-rail output | Drives ADC inputs or comparator thresholds directly without external op-amp buffering; supports 2 mA sink/source. |
| Low 1 mA supply current | Reduces thermal impact in dense PCB layouts and extends battery life in portable chargers and UPS systems. |
Applications
| Server SMPS Current Monitoring | Solar Charge Controller Sensing |
|---|---|
Use Scenario: Real-time load current measurement on 12 V intermediate bus in dual-CPU server power delivery. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt ΔV into ground-referenced analog signal for PMBus ADC sampling. Use Value: Enables accurate power budgeting and OCP triggering with ±6% output error-no calibration required across −40°C to +85°C. | Use Scenario: Bidirectional current sensing in MPPT charge controller between PV array and Li-ion battery bank. IC Role / Device Role / Timing Role: High-side amplifier measuring charging/discharging current via single shunt; output fed to microcontroller ADC. Use Value: 2.8–24 V common-mode range accommodates variable PV string voltage (up to 22 V) while powered from 5 V MCU rail. |
| Notebook CPU VRM Feedback | DC Motor Drive Current Protection |
Use Scenario: Phase current monitoring in notebook CPU voltage regulator module using high-side shunt on 1.2 V output rail. IC Role / Device Role / Timing Role: Precision current amplifier feeding analog feedback loop for dynamic phase shedding control. Use Value: 95 dB CMRR rejects PWM switching noise from adjacent power stages, preserving signal integrity at 1 MHz switching frequency. | Use Scenario: Overcurrent detection in 24 V brushed DC motor driver before H-bridge MOSFETs. IC Role / Device Role / Timing Role: High-side current monitor triggering hardware shutdown when sensed current exceeds threshold. Use Value: 1 mA quiescent current allows always-on protection without draining auxiliary 5 V supply during motor idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | 20 V/V gain, 76 V max common-mode, higher 2.7 mA ICC, SO-8 package | Supports industrial 48 V buses; less suitable for space-constrained SOT23-5 layouts | Select for >24 V common-mode or higher accuracy (±0.5% gain error); avoid if board area or standby current are critical. |
| INA240A1DGNR | 20 V/V gain, 80 V max common-mode, 2.4 mA ICC, MSOP-8, integrated EMI filter | Designed for motor drive EMI environments; larger footprint and higher power | Choose for noisy 48 V DC motor systems requiring built-in RF filtering; not optimal for compact 5 Vsb-powered servers. |
Compared with MAX4080TASA+ and INA240A1DGNR, the TSC888AILT offers the smallest footprint and lowest quiescent current for ≤24 V high-side sensing, trading off ultra-high common-mode range and advanced EMI hardening for cost and size efficiency in consumer/IT power systems.
Availability
TSC888AILT is available at Aetrix Electronics and suitable for desktop/server SMPS, photovoltaic charge controllers, and notebook VRM current monitoring requiring stable component supply and long-term industrial lifecycle support.
Supply support for TSC888AILT 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The TSC888 belongs to ST's precision analog current sensing portfolio, engineered specifically for cost-sensitive, space-constrained high-side measurement in computing and renewable energy power systems.
FAQ
Can TSC888AILT measure bidirectional current?
No. The TSC888AILT is unidirectional: it measures only the magnitude of Vp − Vm, with polarity determined by internal architecture. Output voltage is always ≥0 V for positive current flow (Vp > Vm). For true bidirectional sensing, a zero-drift amplifier with reference bias or dedicated bidirectional IC like INA226 is required.
What is the minimum shunt voltage the TSC888AILT can accurately resolve?
With ±6% total output error and 20 V/V gain, the minimum resolvable differential input is ~2.5 mV for 50 mV full-scale output error budget. At 25°C, typical input offset voltage is <100 µV, supporting sub-5 mV sense voltage detection in precision applications with post-processing calibration.
Does TSC888AILT require external compensation capacitors?
No. The TSC888AILT features internally compensated unity-gain-stable output stage. No external capacitor is needed for stability across all loads within its 2 mA drive capability. Layout best practice remains short traces to minimize parasitic inductance on Vp/Vm inputs.
How does TSC888AILT handle overvoltage on Vp or Vm pins?
Vp and Vm pins tolerate −0.3 V to +30 V (relative to GND) per absolute maximum ratings. Internal ESD protection diodes clamp transient overvoltages, but sustained >30 V or reverse bias <−0.3 V risks permanent damage. External Zener clamps are recommended for systems exposed to load-dump or inductive kick events.
TSC888AILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5.5 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 2 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSC888AILT FAQ
1.How can I place an order for TSC888AILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC888AILT 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 TSC888AILT reliable?
The price and inventory of TSC888AILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC888AILT is usually 5 days.
3.What payment methods are accepted for TSC888AILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC888AILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC888AILT?
TSC888AILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC888AILT 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 TSC888AILT?
For technical support, including TSC888AILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC888AILT requirements.
6.How does Aetrix verify that TSC888AILT is sourced from the original manufacturer or authorized distributors?
All TSC888AILT 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 TSC888AILT meets industry standards.
7.What is the process for return or replacement of TSC888AILT?
All TSC888AILT units undergo pre-shipment inspection (PSI). If there is an issue with TSC888AILT, 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 TSC888AILT part is unused and in its original packaging.
Return procedure for TSC888AILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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