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STMicroelectronics TSU111IYLT
- Part No.:
- TSU111IYLT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSU111IYLT.pdf
- Description:
- NANOPOWER (900 NA) HIGH ACCURACY
- Quantity:
- Payment:
- Shipping:
Inventory:1,943
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Product details
Overview
TSU111IYLT from STMicroelectronics is a single-channel AEC-Q100 qualified nanopower operational amplifier optimized for ultra-low-power sensor signal conditioning and battery monitoring in automotive and industrial systems. It delivers 920 nA typical supply current at 25 °C, 150 µV max. input offset voltage at 25 °C, rail-to-rail input/output operation from 1.5 V to 5.5 V supply, and 9 kHz gain bandwidth - enabling precise DC-coupled sensing in coin-cell–powered BMS and energy harvesting nodes.
For engineers reviewing the TSU111IYLT datasheet, TSU111IYLT pinout, TSU111IYLT application, or TSU111IYLT equivalent, this op-amp is selected for its verified sub-microamp quiescent current, guaranteed 400 µV max. offset over –40 to 125 °C, 4.6 µVpp low-frequency noise, high CMRR (up to 106 dB), and ESD robustness (4 kV HBM), making it critical for long-life, high-accuracy analog front-ends where power budget and thermal drift are design constraints.
Technical Context
The TSU111IYLT employs complementary PMOS/NMOS input stages to achieve rail-to-rail input common-mode range (VCC− −0.1 V to VCC+ +0.1 V) without phase reversal. Its nanopower architecture maintains stable DC performance across 1.5–5.5 V supply and full industrial temperature range.
It features MOSFET input transistors with ≤10 pA max. input bias current at 25 °C, enabling direct interfacing with high-impedance sensors (e.g., electrochemical gas sensors). The 9 kHz GBP and 0.9–1.9 V/ms slew rate support low-frequency precision amplification while minimizing dynamic power overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 920 nA typ. at 25 °C, 1.65 µA max. over –40 to 125 °C - enables >25-year operation on CR2032 battery |
| Input Offset Voltage | 150 µV max. at 25 °C; 400 µV max. over full temp range - supports high-accuracy DC measurement without calibration |
| Gain Bandwidth Product | 9 kHz typ. - sufficient for DC–100 Hz sensor signals (e.g., thermistors, strain gauges) |
| Input Noise (0.1–10 Hz) | 4.6 µVpp - preserves resolution in low-frequency, high-gain transimpedance stages |
| Common-Mode Rejection | 85–106 dB - rejects supply ripple and ground bounce in noisy automotive environments |
| ESD Robustness | 4 kV HBM - meets AEC-Q100 stress requirements for under-hood and battery-pack applications |
| Rail-to-Rail I/O | Input range: VCC− −0.1 V to VCC+ +0.1 V; Output swing within 25 mV of rails - maximizes dynamic range at low supply voltages |
Pinout & Package
TSU111IYLT is supplied in SC70-5 package (2.0 × 1.25 mm, 0.65 mm pitch), optimized for space-constrained automotive and portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Non-inverting input | High-impedance node (≤10 pA bias) for reference or sensor signal connection |
| 2 VCC− | Negative supply | Ground reference for single-supply operation; connects to system GND or negative rail |
| 3 IN− | Inverting input | High-impedance feedback node; compatible with transimpedance or differential configurations |
| 4 OUT | Amplified output | Capable of sourcing/sinking ≥12 mA at 3.3 V; rail-to-rail swing supports ADC input scaling |
| 5 VCC+ | Positive supply | Accepts 1.5–5.5 V; decoupling capacitor required within 1 mm for stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade Y qualification | Validated for automotive applications including battery management and on-board chargers |
| Sub-µA quiescent current | 920 nA typ. at 25 °C ensures multi-year operation on 220 mAh CR2032 cells |
| Low-offset, low-drift architecture | 400 µV max. offset over –40 to 125 °C enables uncalibrated precision in wide-temp environments |
| Phase-reversal–free input stage | Complementary PMOS/NMOS pair prevents output inversion during rail-overdrive - critical for comparator-mode wake-up |
| Guard-compatible layout | High-impedance inputs support PCB guarding techniques to suppress moisture-induced leakage |
Applications
| Battery Management System (BMS) | Energy Harvesting Node |
|---|---|
Use Scenario: Detects microamp-level charging/discharging currents in lithium-ion packs to trigger CPU wake-up and state-of-charge calculation. IC Role / Device Role / Timing Role: Ultra-low-power op-amp configured as current-sense amplifier with transimpedance gain, operating continuously in sleep mode. Use Value: 920 nA supply current extends battery life beyond 10 years; 150 µV offset ensures <0.5% current measurement error at 100 µA sense level. | Use Scenario: Amplifies picoamp-level output from piezoelectric or thermoelectric harvesters before ADC sampling in wireless sensor nodes. IC Role / Device Role / Timing Role: High-impedance buffer and gain stage in analog front-end, powered directly from harvested energy storage capacitor. Use Value: ≤10 pA input bias current prevents signal loss across MΩ-range harvesters; rail-to-rail output matches 1.8 V ADC reference. |
| On-Board Charger (OBC) Monitoring | UV/Photo Sensor Interface |
Use Scenario: Monitors isolation barrier leakage or auxiliary supply rail integrity during EV charging cycles. IC Role / Device Role / Timing Role: Precision comparator and voltage monitor in safety-critical OBC auxiliary power domain. Use Value: 4 kV HBM ESD rating withstands transient coupling from high-voltage AC/DC conversion; 400 µV offset ensures reliable fault detection at ±10 mV thresholds. | Use Scenario: Converts photocurrent from UV photodiodes into measurable voltage for environmental monitoring or flame detection. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable gain, operating from 1.5 V coin cell in portable handheld devices. Use Value: 4.6 µVpp low-frequency noise preserves signal integrity at 0.1–10 Hz bandwidth; MOS input avoids loading high-impedance photodiode junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower, high-accuracy op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSZ121ILT | Lower supply current (600 nA typ.), same 150 µV offset, but 5.5 kHz GBP and no AEC-Q100 qualification | Targeted at non-automotive portable electronics only; lacks automotive reliability validation | Select when absolute lowest power dominates over automotive compliance and bandwidth needs |
| OPA310SAIDCKR | Higher supply current (1.2 µA typ.), 125 µV offset, 300 kHz GBP, rail-to-rail I/O, but not AEC-Q100 qualified | Supports higher-speed sensor interfaces (e.g., fast-response thermocouples); unsuitable for automotive BMS | Select when bandwidth >10 kHz is required and automotive qualification is unnecessary |
Compared with TSZ121ILT and OPA310SAIDCKR, TSU111IYLT uniquely combines AEC-Q100 qualification, 9 kHz bandwidth, and 400 µV max. offset over –40 to 125 °C - making it the only choice for automotive-grade, long-life, ultra-low-power DC signal conditioning where both reliability and precision are non-negotiable.
Availability
TSU111IYLT is available at Aetrix Electronics and suitable for battery management systems, energy harvesting nodes, on-board chargers, and UV sensor interfaces requiring stable component supply across automotive and industrial production lifecycles.
Supply support for TSU111IYLT 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, power ICs, analog components, and MEMS sensors for automotive, industrial, and consumer markets.
The TSU111 series belongs to ST's nanopower precision op-amp product line, engineered specifically for always-on, battery-constrained applications demanding AEC-Q100 reliability, sub-microamp operation, and high DC accuracy without calibration.
FAQ
What is the maximum operating temperature range for TSU111IYLT?
The TSU111IYLT is specified for continuous operation from –40 °C to +125 °C ambient temperature, fully qualified per AEC-Q100 Grade Y requirements. All key parameters-including input offset voltage (400 µV max.), supply current (1.65 µA max.), and CMRR (71 dB min.)-are guaranteed across this full industrial and automotive temperature range.
Can TSU111IYLT be used as a comparator?
Yes, TSU111IYLT can operate in open-loop comparator mode due to its rail-to-rail output and phase-reversal–free input stage. However, it is not optimized for speed: recovery from saturation takes 420 µs (positive rail) or 880 µs (negative rail). For dedicated comparison, ST recommends the TS88x nanopower comparators, which offer faster response and lower propagation delay.
Does TSU111IYLT require external compensation for unity-gain stability?
No, TSU111IYLT is internally compensated and unity-gain stable across its full supply range (1.5–5.5 V) and temperature range (–40 to 125 °C). Stability is verified with 60 pF capacitive load and 1 MΩ resistive load per datasheet test conditions; no external compensation network is needed in standard configurations.
How does the guarding technique improve TSU111IYLT performance in PCB layout?
Guarding surrounds high-impedance input traces (IN+, IN−) with a low-impedance conductor held at the same potential-typically via op-amp output feedback or buffered reference. This eliminates leakage current paths caused by PCB surface contamination or humidity, preserving the ≤10 pA input bias current specification and preventing offset drift in nanopower sensor interfaces.
TSU111IYLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0031V/µs
- Gain Bandwidth Product:
- 9 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1µA
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 1.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSU111IYLT FAQ
1.How can I place an order for TSU111IYLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSU111IYLT 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 TSU111IYLT reliable?
The price and inventory of TSU111IYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSU111IYLT is usually 5 days.
3.What payment methods are accepted for TSU111IYLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSU111IYLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSU111IYLT?
TSU111IYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSU111IYLT 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 TSU111IYLT?
For technical support, including TSU111IYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSU111IYLT requirements.
6.How does Aetrix verify that TSU111IYLT is sourced from the original manufacturer or authorized distributors?
All TSU111IYLT 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 TSU111IYLT meets industry standards.
7.What is the process for return or replacement of TSU111IYLT?
All TSU111IYLT units undergo pre-shipment inspection (PSI). If there is an issue with TSU111IYLT, 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 TSU111IYLT part is unused and in its original packaging.
Return procedure for TSU111IYLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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