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STMicroelectronics TSB621ILT
- Part No.:
- TSB621ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSB621ILT.pdf
- Description:
- LOW POWER, 1.7MHZ, RAIL-TO-RAIL
- Quantity:
- Payment:
- Shipping:
Inventory:1,847
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Product details
Overview
TSB621ILT from STMicroelectronics is a single-channel, rail-to-rail output operational amplifier designed for precision signal conditioning in automotive and industrial power supply monitoring circuits. It delivers 1.7 MHz gain bandwidth, 1 mV max input offset voltage at 25 °C, 375 μA max supply current per channel at 36 V, and operates across -40 to 125 °C - enabling use in engine control unit (ECU) sensor interfaces and 24 V DC-DC feedback loops.
For engineers reviewing the TSB621ILT datasheet, TSB621ILT pinout, TSB621ILT application, or TSB621ILT equivalent, key selection criteria include its rail-to-rail output swing with ground-sensing inputs, 36 V wide supply range, AEC-Q100 qualification, and low 30 nV/√Hz input noise at 1 kHz - critical for high-side current sensing and battery management analog front-ends.
Technical Context
The TSB621ILT employs a CMOS input stage with input common-mode voltage extending to ground and rail-to-rail output swing, supporting single-supply operation down to 2.7 V. Its unity-gain stable architecture achieves 45° phase margin with 100 pF capacitive load, ensuring robustness in noisy automotive environments.
It features EMI hardening and 4 kV HBM ESD tolerance, with supply voltage rejection ratio (SVR) of 124 dB at 36 V and common-mode rejection ratio (CMR) up to 135 dB - confirming suitability for high-precision differential measurements in electric powertrain subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.7 MHz at 36 V - enables stable closed-loop operation up to ~100 kHz in unity-gain buffer or transimpedance configurations. |
| Input Offset Voltage | 1 mV max at 25 °C - ensures ≤10 mV error in 10 V full-scale current sense amplifiers without trimming. |
| Supply Current per Channel | 375 μA max at 36 V - supports always-on diagnostics in low-power automotive modules with <1.4 mW quiescent dissipation. |
| Rail-to-Rail Output | Swings within 35 mV of VCC and 50 mV of VCC− at 25 °C - preserves dynamic range in 3.3 V or 5 V microcontroller ADC interfaces. |
| Operating Temperature | -40 to 125 °C - meets under-hood automotive ambient requirements per AEC-Q100 Grade 1. |
| Input Common-Mode Range | Includes ground (VCC−) - allows direct connection to shunt resistors referenced to system ground in high-side sensing. |
| ESD Tolerance | 4 kV HBM - exceeds IEC 61000-4-2 Level 3 for board-level transient immunity in production assemblies. |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.45 mm body height, wettable flanks optional, RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail sourced/sunk current up to 45 mA; drives 10 kΩ loads with <0.005% THD+N at 1 kHz. |
| 2 (VCC−) | Negative supply rail | Reference for dual-supply operation; tied to ground in single-supply systems; supports true ground-referenced input. |
| 3 (IN+) | Non-inverting input | High-impedance CMOS node (IIB = 30 nA typ); accepts signals from 0 V to VCC−1 V across full temperature range. |
| 4 (IN−) | Inverting input | Differential pair input; matched to IN+ for <1.6 mV offset drift over -40 to 125 °C. |
| 5 (VCC+) | Positive supply rail | Accepts 2.7–36 V; internal regulation enables stable biasing across wide input transients typical in 24 V vehicle systems. |
Key Features
| Feature | Design Value |
|---|---|
| Low power + high speed | 1.7 MHz GBW at only 375 μA - achieves 10× better speed/power ratio than legacy 1 MHz op-amps in same package. |
| Rail-to-rail output with ground-sensing input | Enables single-supply 3.3 V or 5 V operation while measuring signals referenced to system ground - eliminates level-shifting circuitry. |
| AEC-Q100 qualified | Qualified per Grade 1 (-40 to 125 °C) with extended reliability testing - approved for safety-critical automotive subsystems including ADAS power monitors. |
| EMI hardened | Immune to 100 MHz–1 GHz RF interference per ISO 11452-4 - prevents erroneous output during cellular/WiFi coexistence in telematics modules. |
| High PSRR & CMRR | 124 dB SVR and 135 dB CMR at 36 V - rejects supply ripple and common-mode noise in noisy 12/24 V battery domains. |
Applications
| Engine Control Unit (ECU) Sensor Interface | Battery Management System (BMS) Shunt Monitor |
|---|---|
Use Scenario: Amplifying low-level signals from exhaust gas oxygen (EGO) sensors and knock sensors in engine compartments. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with ground-referenced input, providing buffered analog output to MCU ADC. Use Value: 1 mV offset ensures ≤0.1% measurement error in 1 V full-scale O2 sensor outputs; 125 °C rating sustains operation near hot exhaust manifolds. |
Use Scenario: High-side current sensing across 50–100 mΩ shunts in 48 V mild-hybrid battery packs. IC Role / Device Role / Timing Role: Single-supply difference amplifier with rail-to-rail output driving isolated sigma-delta modulator inputs. Use Value: Input common-mode range including ground enables direct shunt connection; 30 nV/√Hz noise maintains SNR >85 dB at 10 kHz bandwidth. |
| Industrial 24 V DC-DC Feedback Loop | Automotive Infotainment Power Sequencing |
Use Scenario: Voltage error amplification in isolated flyback or forward converter feedback paths. IC Role / Device Role / Timing Role: Compensator in Type II/III compensation networks; stabilizes loop with 1.7 MHz GBW and 45° phase margin. Use Value: Unity-gain stability with 100 pF load simplifies PCB layout; 36 V supply withstands 40 V transient surges per ISO 7637-2 Pulse 1/2. |
Use Scenario: Monitoring and sequencing multiple 1.8 V, 3.3 V, and 5 V rails during cold-start and wake-up sequences. IC Role / Device Role / Timing Role: Window comparator input buffer and reference-level translator for power-good logic. Use Value: Low 375 μA supply current minimizes standby loss; 4 kV HBM protects against ESD events during connector mating in head-unit assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel rail-to-rail output op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSB571ILT | Lower supply current (160 μA max), reduced GBP (0.9 MHz), same 36 V supply and -40 to 125 °C range. | Better suited for ultra-low-power always-on monitoring where bandwidth <1 MHz suffices. | Select when minimizing quiescent power is prioritized over signal fidelity at higher frequencies. |
| TSB711ILT | Includes rail-to-rail input stage, higher precision (0.3 mV VIO max), higher GBP (10 MHz), but limited to 20 V supply. | Required for precision instrumentation with bipolar input signals or fast settling demands. | Choose when input signal swings beyond VCC−+0.1 V or sub-microsecond response is needed. |
Compared with TSB571ILT, the TSB621ILT trades 57% higher current for 89% more bandwidth and identical automotive qualification; versus TSB711ILT, it sacrifices input-stage precision and voltage headroom for broader supply flexibility and lower cost in high-voltage feedback applications.
Availability
TSB621ILT is available at Aetrix Electronics and suitable for automotive ECU sensor interfaces, industrial 24 V DC-DC feedback loops, and battery management shunt monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for TSB621ILT 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 automotive, industrial, and consumer markets.
The TSB621 series belongs to ST's high-reliability automotive op-amp portfolio, engineered specifically for robust signal conditioning in harsh environment applications - emphasizing wide supply range, AEC-Q100 compliance, and EMI resilience.
FAQ
Is the TSB621ILT pin-compatible with other SOT23-5 op-amps?
No - the TSB621ILT uses non-standard pinout: Pin 1 = OUT, Pin 2 = VCC−, Pin 3 = IN+, Pin 4 = IN−, Pin 5 = VCC+. This differs from industry-standard SOIC/SOT23-5 layouts (e.g., LMV321, TSX561), requiring dedicated PCB footprint and schematic symbol validation before substitution.
Does the TSB621ILT support dual-supply operation?
Yes - it operates with split supplies from ±1.35 V to ±18 V (VCC+ to VCC− = 2.7 to 36 V). The input common-mode range extends to VCC−, and output swings rail-to-rail, enabling true dual-supply configurations such as ±12 V for industrial signal chains without external level shifters.
What is the thermal performance of the SOT23-5 package at maximum load?
With RthJA = 250 °C/W (SOT23-5), dissipating 15 mW (36 V × 420 μA worst-case) yields ~3.8 °C junction-to-ambient rise above ambient - well within safe limits. Derating begins above 105 °C ambient due to 150 °C max junction temperature specification.
Can the TSB621ILT drive capacitive loads directly?
It remains stable with up to 100 pF capacitive load per datasheet Figure 18–21, delivering 45° phase margin. For >100 pF (e.g., long traces or ADC input caps), a 10–50 Ω series resistor at the output is recommended to isolate capacitance and maintain stability without sacrificing bandwidth.
TSB621ILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1.7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 310µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSB621ILT FAQ
1.How can I place an order for TSB621ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSB621ILT 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 TSB621ILT reliable?
The price and inventory of TSB621ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSB621ILT is usually 5 days.
3.What payment methods are accepted for TSB621ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSB621ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSB621ILT?
TSB621ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSB621ILT 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 TSB621ILT?
For technical support, including TSB621ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSB621ILT requirements.
6.How does Aetrix verify that TSB621ILT is sourced from the original manufacturer or authorized distributors?
All TSB621ILT 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 TSB621ILT meets industry standards.
7.What is the process for return or replacement of TSB621ILT?
All TSB621ILT units undergo pre-shipment inspection (PSI). If there is an issue with TSB621ILT, 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 TSB621ILT part is unused and in its original packaging.
Return procedure for TSB621ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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