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STMicroelectronics TS941AILT
- Part No.:
- TS941AILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS941AILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
TS941AILT from STMicroelectronics is a rail-to-rail output, micropower CMOS operational amplifier in SOT23-5 package, specified for 2.5 V to 10 V single-supply operation over -40°C to +85°C. It delivers 10 kHz gain bandwidth, 1.2 µA supply current (typ), 1 pA input bias current (typ), and rail-to-rail output swing - enabling precision signal conditioning in ultra-low-power battery systems such as smoke detectors and portable pH meters.
For engineers reviewing the TS941AILT datasheet, TS941AILT pinout, TS941AILT application, or TS941AILT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation value, and confirmed alternative options with documented functional trade-offs.
Technical Context
The TS941AILT employs a CMOS input stage delivering ultra-low 1 pA typical input bias current and rail-to-rail output stage capable of sourcing/sinking up to 1.5 mA at 3 V. Its 10 kHz gain-bandwidth product and 65° phase margin ensure stable unity-gain operation with capacitive loads up to 50 pF.
Designed for single-supply use, it supports common-mode input voltage range from VDD − 0.2 V to VCC − 1.3 V and maintains constant 1.2 µA supply current across 2.5–10 V supply, making it ideal for end-of-battery-life operation where supply voltage droops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA typ - enables >1-year operation on a CR2032 coin cell in low-duty-cycle sensor nodes |
| Input Bias Current | 1 pA typ - minimizes voltage error in high-impedance pH electrode and gas sensor interfaces |
| Gain Bandwidth | 10 kHz - sufficient for DC–100 Hz sensor signal amplification without stability risk |
| Output Swing | Rail-to-rail - delivers full dynamic range at 3 V supply, maximizing ADC utilization |
| CMRR | 85 dB typ - rejects common-mode noise in unshielded battery-powered instrumentation |
| ESD Protection | 2 kV HBM - withstands handling in non-ESD-controlled assembly environments |
| Operating Temp | −40°C to +85°C - qualified for industrial and consumer environmental monitoring deployments |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm pitch, surface-mount, lead-free ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | High-impedance CMOS node; accepts signals up to VCC − 1.3 V, critical for sensor buffer stages |
| 2 (IN−) | Inverting input | Differential input node; matched to IN+ for <10 mV offset in precision transducer amps |
| 3 (V−) | Negative supply / ground | Reference for single-supply operation; must be connected directly to PCB ground plane |
| 4 (OUT) | Amplifier output | Rail-to-rail capable; drives 10 kΩ load to within 150 mV of rails at 3 V, enabling direct ADC interface |
| 5 (V+) | Positive supply | Accepts 2.5–10 V; supply current remains stable across range, simplifying battery-voltage scaling |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers full 0–3 V swing at 3 V supply, maximizing SNR when driving 12-bit SAR ADCs |
| Micropower operation | 1.2 µA ICC enables >5-year shelf life in smoke detector standby mode (EN/ALERT logic disabled) |
| Ultra-low input bias | 1 pA IIB prevents >10 mV error across 10 MΩ pH probe impedance at 25°C |
| Single-supply compatible | VICM extends to VDD − 0.2 V, allowing direct connection to grounded sensor elements |
| Latch-up immunity | Class A rating ensures no destructive latch-up during ESD events or supply sequencing faults |
Applications
| Smoke Detector Signal Conditioning | pH Meter Front-End Amplifier |
|---|---|
Use Scenario: Amplifying weak ion-current signals from electrochemical smoke chamber under 3 V coin-cell power. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10 MΩ feedback resistor, converting pA-level chamber current to measurable voltage. Use Value: 1 pA input bias avoids signal corruption; rail-to-rail output ensures full 0–3 V range feeds 10-bit ADC without level-shifting. | Use Scenario: Buffering high-impedance glass electrode (≥1 GΩ) in handheld pH meter operating from two AAA cells. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating electrode from ADC input capacitance and noise. Use Value: 1 pA IIB limits electrode polarization error to <0.1 mV; 1.2 µA ICC extends battery life to >200 hours continuous use. |
| Portable Gas Sensor Interface | Battery-Powered Instrumentation |
Use Scenario: Amplifying microvolt-level output from catalytic bead or NDIR gas sensor in wearable air-quality monitor. IC Role / Device Role / Timing Role: Low-noise, low-drift preamplifier stage preceding 24-bit delta-sigma ADC. Use Value: 7 µV/°C offset drift minimizes calibration frequency; 85 dB CMRR rejects supply ripple in shared battery rail. | Use Scenario: Precision reference buffer and sensor signal conditioner in field-deployable data logger powered by Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Dual-role device: reference voltage follower and transducer amplifier in same SOT23-5 footprint. Use Value: Stable 1.2 µA ICC across 3.6–2.5 V battery discharge curve enables accurate runtime prediction and low-power sleep-state management. |
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 |
|---|---|---|---|
| TLV2461IDBVR | Higher 600 nA IIB, 220 µA ICC, 6.4 MHz GBP | Not suitable for >10 MΩ sensor sources; better for higher-speed, higher-power signal chains | Select only if bandwidth >100 kHz required and supply current budget >200 µA |
| MAX40002ANA+ | 150 nA IIB, 1.2 µA ICC, but only 3.5 kHz GBP and no rail-to-rail output | Lower drive capability limits use in ADC interface; requires external level-shifter | Prefer only for ultra-low-offset (<50 µV) requirements where output swing is not constrained |
Compared with TLV2461IDBVR and MAX40002ANA+, the TS941AILT uniquely balances sub-picoampere input bias, true rail-to-rail output, and micropower consumption - making it the only option among the three viable for high-impedance, battery-critical pH and smoke detection front-ends.
Availability
TS941AILT is available at Aetrix Electronics and suitable for smoke/fire detection systems, portable pH meters, battery-powered gas sensors, and industrial data loggers requiring stable component supply across extended production lifecycles.
Supply support for TS941AILT 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, MCU, 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, high-impedance sensor signal conditioning in battery-constrained environments - emphasizing rail-to-rail output, picoampere input bias, and supply voltage insensitivity.
FAQ
What is the maximum capacitive load the TS941AILT can drive while maintaining stability?
The TS941AILT is characterized for stable unity-gain operation with up to 50 pF capacitive load, as confirmed by phase margin measurements (65°) in the datasheet. Driving larger loads requires external isolation resistor (e.g., 100 Ω in series with output) to prevent peaking or oscillation - especially critical in pH meter cables or long PCB traces.
Does the TS941AILT support dual-supply operation?
No - the TS941AILT is designed exclusively for single-supply operation from 2.5 V to 10 V. Its input common-mode range extends down to VDD − 0.2 V and up to VCC − 1.3 V, and its output swings rail-to-rail relative to those supplies. Dual-supply use (e.g., ±2.5 V) is not specified, tested, or guaranteed per ST's absolute maximum ratings and electrical characteristics tables.
How does the 1.2 µA supply current behave across temperature?
Supply current remains tightly regulated: 1.10–1.30 µA over −40°C to +85°C at VCC = 2.5–10 V, as shown in Figure 4 of the datasheet. This minimal variation ensures predictable battery lifetime estimation in outdoor or automotive-adjacent deployments where ambient temperature fluctuates widely.
Can the TS941AILT be used as a comparator?
No - the TS941AILT is not optimized or characterized for open-loop comparator operation. It lacks internal hysteresis, has slow slew rate (3–4.5 V/ms), and exhibits undefined recovery behavior when overdriven. For comparator functions in the same low-power domain, ST recommends dedicated devices like TS881ILT or TLV3691IDCKR.
TS941AILT 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:
- 5 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
TS941AILT FAQ
1.How can I place an order for TS941AILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS941AILT 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 TS941AILT reliable?
The price and inventory of TS941AILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS941AILT is usually 5 days.
3.What payment methods are accepted for TS941AILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS941AILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS941AILT?
TS941AILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS941AILT 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 TS941AILT?
For technical support, including TS941AILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS941AILT requirements.
6.How does Aetrix verify that TS941AILT is sourced from the original manufacturer or authorized distributors?
All TS941AILT 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 TS941AILT meets industry standards.
7.What is the process for return or replacement of TS941AILT?
All TS941AILT units undergo pre-shipment inspection (PSI). If there is an issue with TS941AILT, 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 TS941AILT part is unused and in its original packaging.
Return procedure for TS941AILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS941AILT Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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