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STMicroelectronics TS941ILT
- Part No.:
- TS941ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS941ILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,610
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Product details
Overview
TS941ILT from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier optimized for ultra-low-power, single-supply operation (2.5 V to 10 V), featuring 1.2 µA typical supply current, 1 pA typical input bias current, and 10 kHz gain bandwidth product. It operates across -40°C to +85°C and is packaged in SOT23-5, targeting battery-powered smoke detectors, portable pH meters, and low-current sensor signal conditioning.
For engineers reviewing the TS941ILT datasheet, TS941ILT pinout, TS941ILT application, or TS941ILT equivalent, this page delivers verified electrical specs, real-world use cases, validated alternatives, and supply-chain support - all grounded in ST's official Doc ID 6972 Rev 6 specification.
Technical Context
The TS941ILT employs CMOS input stage architecture enabling ultra-low input bias current (1 pA) and rail-to-rail output swing (e.g., 2.85 V at 3 V supply with 10 kΩ load). Its micropower design maintains stable 1.2–1.8 µA supply current across 2.5–10 V supply range, critical for end-of-battery-life operation.
It delivers 10 kHz gain-bandwidth product and 3–4.5 V/ms slew rate under 1 MΩ/50 pF load, with phase margin of 65° ensuring stability in unity-gain buffer and high-impedance sensor interface configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA typ. - enables >1-year operation on CR2032 in always-on smoke detector mode |
| Input Bias Current | 1 pA typ. - preserves accuracy in high-Z pH electrode and piezoelectric sensor interfaces |
| Gain Bandwidth Product | 10 kHz - supports DC–1 kHz signal conditioning for gas sensing and analog front-ends |
| Output Swing | Rail-to-rail - delivers full 0–3 V dynamic range from 3 V supply, maximizing ADC utilization |
| Common-Mode Range | VDD − 0.2 V to VCC − 1.3 V - accommodates single-ended sensor outputs referenced to ground or mid-supply |
| ESD Protection | 2 kV HBM - meets IEC 61000-4-2 Level 2 for handheld and field-deployable instrumentation |
| Operating Temp | −40°C to +85°C - qualified for industrial and consumer environmental monitoring enclosures |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm pitch, thermally enhanced die pad (exposed copper not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Rail-to-rail voltage source/sink capable of ±650 µA at 3 V, driving 10 kΩ loads to within 150 mV of rails |
| 2 (−IN) | Inverting Input | CMOS node with 1 pA bias current; requires guarded trace routing in high-impedance pH probe applications |
| 3 (V−) | Negative Supply / Ground | Reference for single-supply operation; must be low-impedance to minimize noise coupling into input stage |
| 4 (V+) | Positive Supply | Accepts 2.5–10 V; supply current remains constant across range, simplifying battery-voltage scaling |
| 5 (+IN) | Non-inverting Input | High-impedance CMOS input; used for reference buffering or sensor excitation feedback paths |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers 0.15 V from each rail at 10 kΩ load (3 V supply), maximizing dynamic range for 10-bit ADCs |
| Micropower operation | 1.2 µA supply current enables >2-year shelf life in battery-backed CO detectors with periodic wake-up |
| Ultra-low input bias | 1 pA bias current prevents voltage error >1 mV in 1 GΩ pH electrode circuits at 25°C |
| Latch-up immunity | Class A rating (200 mA) ensures robustness against transient overvoltage during sensor hot-plug events |
| Single-supply compatible | Operates down to 2.5 V with input common-mode extending to VDD − 0.2 V, supporting direct Li-ion cell interfacing |
Applications
| Smoke Detector Signal Conditioning | pH Meter Front-End Amplifier |
|---|---|
|
Use Scenario: Amplifying weak ion-current signals (sub-nA) from electrochemical smoke chamber electrodes under 3 V coin-cell power. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with rail-to-rail output feeding 12-bit SAR ADC. Use Value: 1 pA input bias avoids signal loss; 1.2 µA quiescent current extends battery life beyond EN54-7 compliance thresholds. |
Use Scenario: Buffering high-impedance glass electrode (≥1 GΩ) output in handheld pH meters powered by two AAA cells. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating electrode from ADC input capacitance. Use Value: Rail-to-rail output preserves full 0–3 V measurement span; CMOS inputs prevent electrode polarization drift. |
| Portable Gas Sensor Interface | Battery-Powered Fire Alarm Controller |
|
Use Scenario: Conditioning output of metal-oxide semiconductor (MOS) gas sensors requiring stable bias and low-drift amplification. IC Role / Device Role / Timing Role: Precision differential amplifier with matched input impedance for bridge-based detection. Use Value: 7 µV/°C offset drift minimizes temperature-induced calibration drift; 85 dB CMRR rejects supply ripple in compact PCB layout. |
Use Scenario: Supervising backup battery voltage and siren driver enable logic in UL-listed fire alarm panels. IC Role / Device Role / Timing Role: Comparator input buffer and threshold reference conditioner with ESD-hardened inputs. Use Value: 2 kV HBM protection withstands field service ESD events; latch-up immunity prevents lockup during power fault recovery. |
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 (80 µA), wider GBW (1 MHz), but same SOT23-5 package and rail-to-rail output | Not suitable for multi-year battery life; better for higher-speed sensor sampling (>1 kHz) | Select when bandwidth >100 kHz is required and battery life <6 months is acceptable |
| OPA348AIDBVR | Lower input bias (0.5 pA), lower offset (1.5 mV), but 45 µA supply current and no latch-up immunity rating | Lacks Class A latch-up immunity; unsuitable for industrial environments with power transients | Prefer only in lab-grade pH instruments with regulated supplies and no field ESD exposure |
Compared with LMV321IDBVR and OPA348AIDBVR, the TS941ILT uniquely balances sub-µA quiescent current, 1 pA bias, rail-to-rail output, and Class A latch-up immunity - making it the only choice for safety-critical, long-life, single-supply sensor nodes where reliability trumps speed.
Availability
TS941ILT is available at Aetrix Electronics and suitable for smoke/fire detectors, portable pH meters, battery-powered gas sensors, and industrial environmental monitors requiring stable component supply across extended production lifecycles.
Supply support for TS941ILT 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 industrial, automotive, and consumer markets.
The TS94x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, single-supply sensor signal conditioning in battery-constrained portable and safety-critical systems.
FAQ
What is the maximum recommended supply voltage for TS941ILT?
The absolute maximum supply voltage is 12 V per Table 2, but the device is characterized and guaranteed for reliable operation between 2.5 V and 10 V. Operation above 10 V voids parametric guarantees and risks exceeding junction temperature limits due to increased dissipation in the SOT23-5 package.
Does TS941ILT support true rail-to-rail input?
No - TS941ILT features rail-to-rail *output* only. Its common-mode input voltage range is specified as VDD − 0.2 V to VCC − 1.3 V (Table 3), meaning the inputs cannot accept signals within ~1.3 V of the positive rail. This is typical for CMOS-input op-amps optimized for micropower.
Can TS941ILT drive a 10 kΩ load to both rails at 3 V supply?
Yes - per Table 5, at VCC = 3 V, VOL is 5 mV max and VOH is 2.99 V min into 10 kΩ, confirming rail-to-rail output capability. The output can sink/source up to 1.5 mA, well above the 300 µA required for that load, ensuring full swing under specified conditions.
Is the SOT23-5 package of TS941ILT lead-free and RoHS-compliant?
Yes - ST's ECOPACK® documentation confirms the TS941ILT uses a lead-free, halogen-free SOT23-5 package compliant with RoHS Directive 2011/65/EU and REACH SVHC regulations, with full material declarations available via ST's quality portal.
TS941ILT 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:
- 0.0045V/µs
- Gain Bandwidth Product:
- 10 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 10 mV
- Current - Supply:
- 1.2µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS941ILT FAQ
1.How can I place an order for TS941ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS941ILT 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 TS941ILT reliable?
The price and inventory of TS941ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS941ILT is usually 5 days.
3.What payment methods are accepted for TS941ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS941ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS941ILT?
TS941ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS941ILT 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 TS941ILT?
For technical support, including TS941ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS941ILT requirements.
6.How does Aetrix verify that TS941ILT is sourced from the original manufacturer or authorized distributors?
All TS941ILT 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 TS941ILT meets industry standards.
7.What is the process for return or replacement of TS941ILT?
All TS941ILT units undergo pre-shipment inspection (PSI). If there is an issue with TS941ILT, 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 TS941ILT part is unused and in its original packaging.
Return procedure for TS941ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS941ILT Tags
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LM358DT
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