My Inquiry
My Account
STMicroelectronics TSU111RILT
- Part No.:
- TSU111RILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TSU111RILT.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:4,145
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TSU111RILT from STMicroelectronics is a nanopower, rail-to-rail input/output operational amplifier optimized for ultra-low-power sensor signal conditioning and battery monitoring in automotive-grade applications. It delivers 920 nA typical supply current at 25 °C, 150 µV max. input offset voltage at 25 °C, 4.6 µVpp low-frequency noise (0.1–10 Hz), 9 kHz gain bandwidth, and operates from 1.5 V to 5.5 V - enabling direct use with CR2032 coin cells in battery management systems.
For engineers reviewing the TSU111RILT datasheet, TSU111RILT pinout, TSU111RILT application, or TSU111RILT equivalent, key selection criteria include sub-microamp quiescent current, guaranteed accuracy over –40 to 125 °C, ESD robustness (4 kV HBM), rail-to-rail operation, and compatibility with high-impedance sensors in energy-constrained embedded systems.
Technical Context
The TSU111RILT 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 CMOS architecture enables 10 pA max. input bias current at 25 °C and stable DC performance across 1.5–5.5 V supply.
It features a 9 kHz gain bandwidth product with 70° phase margin and 30 dB gain margin, supporting stable unity-gain configurations. Low 4.6 µVpp 0.1–10 Hz noise and 2.5 µV/°C max. offset drift enable precision DC-coupled sensing without calibration in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 920 nA typ. at 25 °C - enables >25-year operation on 220 mAh CR2032 battery |
| Input Offset Voltage | 150 µV max. at 25 °C - supports high-accuracy DC signal amplification without trimming |
| Offset Drift | 2.5 µV/°C max. - ensures predictable error accumulation over –40 to 125 °C |
| Low-Frequency Noise | 4.6 µVpp (0.1–10 Hz) - critical for stable output in slow-varying sensor signals |
| Gain Bandwidth Product | 9 kHz typ. - sufficient for DC–low-frequency sensor interfaces (e.g., thermistors, gas sensors) |
| Input Bias Current | 10 pA max. at 25 °C - preserves signal integrity with MΩ-range sensor impedances |
| ESD Rating | 4 kV HBM - meets AEC-Q100 stress requirements for automotive PCB handling |
Pinout & Package
SOT23-5 package (3.04 mm × 1.4 mm × 1.1 mm), RoHS-compliant, surface-mount. Pin 1 marked by dot or bevelled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplified output node; rail-to-rail swing supports full-supply utilization |
| 2 | VCC− | Negative supply reference; connects to ground or negative rail in dual-supply configs |
| 3 | IN+ | Non-inverting input; high-impedance MOS node for sensor or reference connection |
| 4 | IN− | Inverting input; accepts feedback or differential signal in transimpedance setups |
| 5 | VCC+ | Positive supply input; accepts 1.5–5.5 V; decoupling capacitor required per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization with single-supply 1.5 V systems, eliminating level-shifting circuitry |
| AEC-Q100 Qualified | Validated for automotive temperature range (–40 to 125 °C) and reliability stress tests per Rev 02 |
| Transimpedance Ready | 10 pA max. input bias current allows stable feedback resistor values ≥100 MΩ for photodiode/gas sensor interfaces |
| No Phase Reversal | Complementary input stage prevents output inversion during input overdrive - avoids false wake-up in BMS |
| Low-Voltage Operation | Functional down to 1.5 V supply - supports direct integration with Li-ion/Li-SOCl₂ primary cells |
Applications
| Battery Management System (BMS) | Energy Harvesting Interface |
|---|---|
Use Scenario: Detects microamp-level charging/discharging current via shunt resistor to trigger MCU wake-up in sleep mode. IC Role / Device Role / Timing Role: Ultra-low-power op-amp configured as current-sense amplifier with rail-to-rail output driving comparator input. Use Value: 920 nA ICC extends system standby time beyond 10 years on CR2032; 150 µV Vio ensures <1% error at 100 µA sense current. | Use Scenario: Amplifies picoamp-level output from thermoelectric or piezoelectric harvesters before ADC sampling. IC Role / Device Role / Timing Role: Transimpedance amplifier converting harvester current to voltage; high Zin preserves source energy. Use Value: 10 pA Iib minimizes loading error; 4.6 µVpp noise avoids masking µV-level harvester signals. |
| On-Board Charger (OBC) Monitoring | Wireless Charging Receiver Sensing |
Use Scenario: Measures battery voltage and temperature in EV OBC auxiliary power rails during charging cycles. IC Role / Device Role / Timing Role: Precision buffer and level-shifter for isolated voltage/temperature feedback to MCU. Use Value: 2.5 µV/°C drift limits thermal error to <30 µV over 125 °C span; 4 kV HBM withstands ESD in high-noise charger environments. | Use Scenario: Conditions coil current/voltage feedback in Qi-compliant receivers to regulate power transfer efficiency. IC Role / Device Role / Timing Role: Signal conditioner for resonant tank current sensing in low-duty-cycle burst-mode operation. Use Value: 9 kHz GBP supports accurate RMS measurement of 100–205 kHz carrier; rail-to-rail output matches ADC input range. |
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 ICC (600 nA typ.), same 150 µV Vio, but 5.5 kHz GBP and no AEC-Q100 qualification | Preferred for non-automotive portable devices where bandwidth <6 kHz suffices | Select when absolute lowest power dominates over automotive compliance and bandwidth |
| OPA316IDBVR | Higher ICC (400 µA), 100 µV Vio, 10 MHz GBP, 1.8–5.5 V supply - not nanopower | Suitable for higher-speed sensor interfaces requiring >100 kHz closed-loop bandwidth | Choose only if system requires >100× higher speed and can tolerate 435× higher current draw |
Compared with TSZ121ILT, TSU111RILT trades 30% lower current for 64% higher bandwidth and automotive qualification; versus OPA316IDBVR, it sacrifices 1100× bandwidth to achieve 435× lower supply current - making it irreplaceable in multi-year battery-powered BMS nodes.
Availability
TSU111RILT is available at Aetrix Electronics and suitable for battery management systems, energy harvesting interfaces, on-board chargers, and wireless charging receiver sensing requiring stable component supply across automotive and industrial lifecycles.
Supply support for TSU111RILT 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, and automotive-grade components since 1987.
The TSU111 series belongs to ST's nanopower precision op-amp product line, engineered specifically for ultra-long-life, high-accuracy signal conditioning in battery-constrained automotive and industrial edge nodes.
FAQ
What is the maximum operating temperature range for TSU111RILT?
The TSU111RILT is specified for continuous operation from –40 °C to +125 °C ambient temperature, fully qualified per AEC-Q100 Grade 1 standards. All key parameters-including input offset voltage (400 µV max.), supply current (1650 nA max.), and CMRR (76 dB min.)-are guaranteed across this full range, making it suitable for under-hood automotive and industrial control applications.
Can TSU111RILT be used as a comparator?
Yes, TSU111RILT can operate in open-loop comparator mode due to its rail-to-rail output and saturation recovery times (420 µs from positive rail, 880 µs from negative rail). However, it lacks dedicated comparator features like internal hysteresis or fast propagation delay. ST recommends the TS88x series for dedicated comparator functions; TSU111RILT is optimized for precision linear operation with guaranteed stability in closed-loop configurations.
Does TSU111RILT require external compensation capacitors?
No external compensation is required. The TSU111RILT is internally compensated for unity-gain stability across its full supply range (1.5–5.5 V) and temperature range (–40 to 125 °C), as confirmed by 70° phase margin and 30 dB gain margin in the datasheet. Layout best practices-such as 10 nF ceramic decoupling caps placed near VCC+ and VCC− pins-are sufficient for stable operation.
How does the SOT23-5 pinout of TSU111RILT differ from TSU111IYLT?
TSU111RILT uses a non-standard SOT23-5 pinout: Pin 1 = OUT, Pin 2 = VCC−, Pin 3 = IN+, Pin 4 = IN−, Pin 5 = VCC+. This differs from TSU111IYLT (Pin 1 = IN+, Pin 2 = VCC−, Pin 3 = IN−, Pin 4 = OUT, Pin 5 = VCC+). PCB layout and schematic symbols must reflect this ordering to avoid functional failure; the device is not pin-compatible with other TSU111 variants in the same package.
TSU111RILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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:
- -
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TSU111RILT FAQ
1.How can I place an order for TSU111RILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSU111RILT 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 TSU111RILT reliable?
The price and inventory of TSU111RILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSU111RILT is usually 5 days.
3.What payment methods are accepted for TSU111RILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSU111RILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSU111RILT?
TSU111RILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSU111RILT 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 TSU111RILT?
For technical support, including TSU111RILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSU111RILT requirements.
6.How does Aetrix verify that TSU111RILT is sourced from the original manufacturer or authorized distributors?
All TSU111RILT 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 TSU111RILT meets industry standards.
7.What is the process for return or replacement of TSU111RILT?
All TSU111RILT units undergo pre-shipment inspection (PSI). If there is an issue with TSU111RILT, 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 TSU111RILT part is unused and in its original packaging.
Return procedure for TSU111RILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSU111RILT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
