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STMicroelectronics TS931ILT
- Part No.:
- TS931ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS931ILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:26,071
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Product details
Overview
TS931ILT from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier in SOT23-5 package, designed for ultra-low-power sensor signal conditioning and battery-powered instrumentation. It operates from 2.7 V to 10 V supply, consumes only 20 μA typical supply current, delivers 2.95 V high-level output at 3 V supply with 100 kΩ load, and features 1 pA input bias current and 2 mV max input offset voltage (TS931B grade).
For engineers reviewing the TS931ILT datasheet, TS931ILT pinout, TS931ILT application, or TS931ILT equivalent, this device is selected for precision, low-voltage analog front-ends where micropower operation, CMOS input stage integrity, and rail-to-rail output swing are critical - especially in portable pH meters, digital scales, and automotive-grade smoke detectors.
Technical Context
The TS931ILT implements a CMOS-input, rail-to-rail output op-amp architecture optimized for single-supply operation down to 2.7 V. Its input common-mode range extends from VCC− −0.2 V to VCC+ −1.5 V, enabling direct sensing of near-ground signals without level-shifting circuitry.
It achieves 100 kHz gain-bandwidth product and 50 V/ms slew rate under 100 kΩ/50 pF load conditions, with 65° phase margin ensuring stable unity-gain follower operation. Input voltage noise is specified at 75 nV/√Hz at 1 kHz, supporting low-noise DC-coupled amplification in high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - enables direct use with single Li-ion, two alkaline, or regulated 3.3 V/5 V rails without external regulators. |
| Supply Current (per amp) | 20 μA typ. - supports >1-year battery life in coin-cell–powered devices operating at 100% duty cycle. |
| Input Bias Current | 1 pA typ. - preserves signal integrity in high-impedance pH electrode or photodiode front-ends without leakage-induced offset drift. |
| Input Offset Voltage | 2 mV max. (TS931B grade) - ensures ≤0.2% full-scale error in 1 V-range sensor outputs without trimming. |
| Output Swing | 2.95 V at VOH / 10 mV at VOL (3 V supply, 100 kΩ load) - delivers true rail-to-rail dynamic range for ADC input optimization. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning including thermocouple, strain gauge, and capacitive humidity sensors. |
| CMRR / PSRR | 85 dB min. - rejects power supply ripple and common-mode interference in noisy automotive or industrial environments. |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm lead pitch, surface-mount, RoHS-compliant ECOPACK® variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V−) | Negative supply / ground reference | Connects to system GND or negative rail; supports single-supply operation with 0 V reference. |
| 2 (In−) | Inverting input | Differential input node with 1 pA bias current; requires matched trace impedance for optimal CMRR. |
| 3 (In+) | Non-inverting input | High-impedance CMOS node; used for reference voltage buffering or sensor excitation feedback. |
| 4 (Out) | Amplifier output | Rail-to-rail capable output driving up to 1.5 mA source/sink into 100 kΩ load. |
| 5 (V+) | Positive supply | Accepts 2.7–10 V DC; internal ESD protection rated to 2 kV HBM on all pins. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range across supply rails - maximizes ADC utilization and eliminates need for level-shifting stages. |
| Micropower consumption | 20 μA supply current enables continuous monitoring in energy-harvesting and battery-backed systems with multi-year runtime. |
| Ultra-low input bias current | 1 pA bias current prevents loading of high-Z sources like glass pH electrodes or piezoelectric sensors. |
| Automotive-grade qualification | Qualified per AEC-Q100 (for TS931B variants) - supports deployment in under-hood and cabin-sensing modules requiring -40°C to +105°C operation. |
| ESD and latch-up immunity | 2 kV HBM ESD rating and Class A latch-up immunity ensure robustness in manufacturing and field-deployed equipment. |
Applications
| Portable pH Meters | Digital Weight Scales |
|---|---|
|
Use Scenario: Amplifying microvolt-level Nernst potential from glass pH electrodes in handheld field testers. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance and buffer amplifier with ultra-low input current and offset stability over temperature. Use Value: Enables ±0.02 pH accuracy without calibration drift due to 1 pA input bias and 3 μV/°C offset drift. |
Use Scenario: Conditioning mV-level bridge output from load cells in consumer and medical weighing platforms. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail instrumentation amplifier front-end with 2.7 V minimum supply compatibility. Use Value: Supports direct interface to 3.3 V SAR ADCs while maintaining >100 dB dynamic range across 0–5 kg full scale. |
| Automotive Smoke Detectors | Battery-Powered Gas Sensors |
|
Use Scenario: Signal conditioning for ionization chamber current in OEM vehicle cabin safety modules. IC Role / Device Role / Timing Role: Micropower transimpedance amplifier with rail-to-rail output driving comparator input. Use Value: Achieves <10 μA total system standby current while maintaining fast response to smoke-induced current spikes. |
Use Scenario: Amplifying nanoamp-level currents from electrochemical CO or NO₂ sensors in portable air quality monitors. IC Role / Device Role / Timing Role: Ultra-low-bias current amplifier with 2.7 V operation for coin-cell–powered field units. Use Value: Eliminates input error from sensor leakage, enabling sub-ppm gas detection resolution over 2-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Higher supply current (65 μA), wider GBW (1 MHz), but 10× higher input bias current (100 pA). | Better for AC-coupled, higher-speed sensor interfaces; less suitable for ultra-high-Z DC sensors. | Select when bandwidth >100 kHz is required and input Z <100 MΩ. |
| MCP6001T-I/OT | Lower offset (1.5 mV max), same 1 pA bias, but only 10 kHz GBW and no AEC-Q100 option. | Preferred for cost-sensitive consumer instrumentation; not qualified for automotive use. | Select for non-automotive, low-offset DC applications where speed is secondary. |
Compared with LMV321IDBVR and MCP6001T-I/OT, the TS931ILT uniquely balances ultra-low bias current, automotive qualification, and rail-to-rail output in a 5-pin SOT23 footprint - making it the optimal choice for safety-critical, battery-constrained, high-impedance analog sensing.
Availability
TS931ILT is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin safety systems, and battery-powered environmental monitoring requiring stable component supply across extended temperature ranges.
Supply support for TS931ILT 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, delivering silicon solutions for smart mobility, power, and sensing applications since 1987.
The TS93x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, rail-to-rail signal conditioning in battery-operated and automotive-grade measurement systems.
FAQ
What is the maximum operating temperature for TS931ILT?
The TS931ILT is rated for operation from −40 °C to +105 °C ambient temperature, meeting industrial and automotive-grade requirements. This range is validated per AEC-Q100 stress testing for TS931B variants, with thermal resistance (RthJA) of 250 °C/W in SOT23-5 package.
Does TS931ILT support dual-supply operation?
No - the TS931ILT is optimized for single-supply operation from 2.7 V to 10 V. Its input common-mode range extends to VCC− −0.2 V, allowing ground-referenced inputs, but it lacks symmetric dual-rail capability or split-supply pin configuration.
Can TS931ILT drive capacitive loads directly?
Stable operation is guaranteed for capacitive loads ≤50 pF per datasheet test conditions. Driving larger capacitive loads (e.g., long PCB traces or ADC input caps) requires isolation via a series resistor (≥100 Ω) to maintain 65° phase margin and prevent oscillation.
Is there a pin-compatible upgrade path from TS931ILT?
No direct pin-compatible upgrade exists within ST's portfolio. The TS931ILT's SOT23-5 layout is unique to this family; alternatives like the TSV911 (same package) offer higher speed but higher current (150 μA), compromising micropower advantage without redesign.
TS931ILT 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:
- Rail-to-Rail
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 10 mV
- Current - Supply:
- 20µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS931ILT FAQ
1.How can I place an order for TS931ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS931ILT 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 TS931ILT reliable?
The price and inventory of TS931ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS931ILT is usually 5 days.
3.What payment methods are accepted for TS931ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS931ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS931ILT?
TS931ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS931ILT 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 TS931ILT?
For technical support, including TS931ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS931ILT requirements.
6.How does Aetrix verify that TS931ILT is sourced from the original manufacturer or authorized distributors?
All TS931ILT 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 TS931ILT meets industry standards.
7.What is the process for return or replacement of TS931ILT?
All TS931ILT units undergo pre-shipment inspection (PSI). If there is an issue with TS931ILT, 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 TS931ILT part is unused and in its original packaging.
Return procedure for TS931ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS931ILT Tags
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LM358DT
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