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STMicroelectronics TS942AIPT
- Part No.:
- TS942AIPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS942AIPT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,596
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Product details
Overview
TS942AIPT from STMicroelectronics is a dual rail-to-rail output micropower operational amplifier optimized for single-supply battery-powered systems. It delivers 1.2 µA supply current per amplifier, 10 kHz gain bandwidth product, 1 pA typical input bias current, and rail-to-rail output swing (e.g., 2.85 V at 3 V supply with 10 kΩ load), enabling precision signal conditioning in low-power smoke detectors and portable instrumentation.
For engineers reviewing the TS942AIPT datasheet, TS942AIPT pinout, TS942AIPT application, or TS942AIPT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SOT23-5 pin mapping, application-specific role analysis, and two confirmed alternative parts with functional and packaging differences.
Technical Context
The TS942AIPT integrates two independent CMOS-input op-amps with rail-to-rail output stage architecture, supporting operation from 2.5 V to 10 V over -40°C to +85°C. Its 1 pA input bias current and 1.2 µA quiescent current per channel are maintained across supply voltage variation, ensuring stable sensor interface performance near end-of-battery life.
It features 85 dB common-mode rejection ratio (CMRR) and 85 dB supply voltage rejection ratio (SVRR) at 5 V, with 10 kHz unity-gain bandwidth and 3–4.5 V/ms slew rate. The device exhibits latch-up immunity (Class A) and 2 kV HBM ESD protection, making it suitable for harsh industrial sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA per amplifier - enables >1-year battery life in coin-cell-powered gas detectors |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance pH electrode interfaces |
| Gain Bandwidth | 10 kHz - supports DC-coupled sensor amplification without stability issues |
| Output Swing | Rail-to-rail - delivers full dynamic range at 3 V supply, e.g., 2.85 VOH/0.1 VOL into 10 kΩ |
| CMRR / SVRR | 85 dB each - rejects noise from shared battery rails and ambient EMI in portable meters |
| Input Offset Drift | 7 µV/°C - ensures <100 µV total drift over full -40°C to +85°C operating range |
| ESD Protection | 2 kV HBM - withstands handling during assembly of handheld smoke alarm PCBs |
Pinout & Package
TS942AIPT is housed in a RoHS-compliant TSSOP8 package (3.0 mm × 3.0 mm × 1.05 mm height), designed for high-density PCB layouts in space-constrained portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Delivers rail-to-rail voltage swing; drives 10 kΩ load to within 150 mV of rails at 3 V |
| 2 (−IN1) | Amplifier 1 inverting input | High-impedance CMOS node (1 pA bias); accepts differential signals up to VCC − 1.3 V |
| 3 (+IN1) | Amplifier 1 non-inverting input | Accepts common-mode inputs down to VDD − 0.2 V; used for reference or sensor biasing |
| 4 (V−) | Negative supply / ground | Connected to system ground in single-supply configurations; supports 0 V minimum input |
| 5 (+IN2) | Amplifier 2 non-inverting input | Independent high-Z input for second sensor channel or reference buffer |
| 6 (−IN2) | Amplifier 2 inverting input | Configurable for transimpedance or difference amplification with matched layout |
| 7 (OUT2) | Amplifier 2 output | Functionally identical to OUT1; enables dual-channel signal conditioning on one die |
| 8 (V+) | Positive supply | Accepts 2.5–10 V; supply current remains constant across this range for predictable power budgeting |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Enables full utilization of 3 V battery headroom in smoke detector analog front-end |
| Micropower operation | 1.2 µA per amplifier allows continuous monitoring with CR2032 battery for >2 years |
| Ultra-low input bias current | 1 pA prevents loading of high-impedance electrochemical sensors (e.g., CO gas cells) |
| Single-supply compatible | Operates from 2.5 V - eliminates need for charge pumps or dual supplies in portable designs |
| Latch-up immunity | Class A rating ensures robustness against transient overvoltage in unregulated battery systems |
Applications
| Smoke Detector Signal Conditioning | pH Meter Front-End Amplifier |
|---|---|
|
Use Scenario: Amplifying weak ion-current signals from optical smoke chamber photodiodes under 3 V coin-cell power. IC Role / Device Role: Dual-channel transimpedance and reference buffer amplifier with rail-to-rail output. Use Value: 1.2 µA quiescent current extends battery life beyond 24 months; 1 pA bias avoids signal distortion from high-impedance photodiode. |
Use Scenario: Buffering and amplifying mV-level output from glass pH electrodes in handheld field meters. IC Role / Device Role: High-input-impedance voltage follower and gain stage with ultra-low input current. Use Value: 1 pA input bias prevents electrode polarization error; rail-to-rail output maximizes ADC resolution at 3.3 V supply. |
| Portable Gas Sensor Interface | Battery-Powered Instrumentation |
|
Use Scenario: Conditioning output of electrochemical CO sensors in wearable air quality monitors. IC Role / Device Role: Precision differential amplifier rejecting common-mode noise on long sensor leads. Use Value: 85 dB CMRR suppresses interference from Bluetooth/WiFi radios; 2.5–10 V supply range accommodates aging Li-ion cells. |
Use Scenario: Low-power signal chain in handheld multimeters and data loggers powered by AA batteries. IC Role / Device Role: Dual op-amp for sensor excitation and measurement amplification in single-supply architecture. Use Value: Constant 1.2 µA supply current simplifies power modeling; TSSOP8 footprint saves board area vs SO-8 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS942IPT | Same silicon, standard grade (no 'A' suffix); 10 mV max input offset vs. 5 mV for TS942AIPT | Acceptable in cost-sensitive smoke alarms where 5 mV offset isn't required for threshold detection | Select TS942IPT when tighter offset isn't needed and BOM cost reduction is prioritized |
| MCP6022-E/SN | Higher supply current (100 µA), wider GBW (1 MHz), but same TSSOP8 package and rail-to-rail output | Suitable for higher-speed sensor interfaces (e.g., pulse oximetry), not ultra-low-power battery monitoring | Choose MCP6022-E/SN only if bandwidth >10 kHz is required and battery life is secondary |
Compared with TS942AIPT, TS942IPT trades 5 mV lower offset for identical micropower and package, while MCP6022-E/SN sacrifices 83× higher current for 100× greater bandwidth-making TS942AIPT optimal for multi-year battery life in safety-critical low-frequency sensing.
Availability
TS942AIPT is available at Aetrix Electronics and suitable for smoke/fire detectors, portable gas analyzers, and handheld pH meters requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for TS942AIPT 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 micropower op-amp product line, engineered specifically for battery-operated safety and measurement equipment where ultra-low current and rail-to-rail output are mandatory.
FAQ
What is the maximum recommended supply voltage for TS942AIPT?
The absolute maximum supply voltage is 12 V, but the device is characterized and specified for reliable operation between 2.5 V and 10 V. Operating above 10 V voids guaranteed performance per the datasheet and risks exceeding thermal limits in the TSSOP8 package due to its 120 °C/W junction-to-ambient thermal resistance.
Does TS942AIPT support true rail-to-rail input?
No - TS942AIPT features rail-to-rail *output* only. Its common-mode input voltage range is specified as VDD − 0.2 V to VCC − 1.3 V, meaning the inputs cannot swing to the positive rail. For true rail-to-rail input capability, ST's TSZ12x series would be required.
Can TS942AIPT drive a 10 kΩ load at 3 V supply?
Yes - the datasheet confirms 2.85 V high-level output (VOH) and 100 mV low-level output (VOL) into 10 kΩ at 3 V supply, achieving >95% of rail-to-rail swing. Output current capability is ±1.3 mA, well above the 300 µA required for that load.
Is TS942AIPT qualified for automotive applications?
No - TS942AIPT is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. ST does not specify automotive-grade reliability testing, stress screening, or failure rate data for this part; use TS942AIDT in SO-8 if automotive qualification is required.
TS942AIPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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:
- 8-TSSOP
TS942AIPT FAQ
1.How can I place an order for TS942AIPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS942AIPT 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 TS942AIPT reliable?
The price and inventory of TS942AIPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS942AIPT is usually 5 days.
3.What payment methods are accepted for TS942AIPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS942AIPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS942AIPT?
TS942AIPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS942AIPT 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 TS942AIPT?
For technical support, including TS942AIPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS942AIPT requirements.
6.How does Aetrix verify that TS942AIPT is sourced from the original manufacturer or authorized distributors?
All TS942AIPT 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 TS942AIPT meets industry standards.
7.What is the process for return or replacement of TS942AIPT?
All TS942AIPT units undergo pre-shipment inspection (PSI). If there is an issue with TS942AIPT, 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 TS942AIPT part is unused and in its original packaging.
Return procedure for TS942AIPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS942AIPT Tags
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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
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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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