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STMicroelectronics TS942IPT
- Part No.:
- TS942IPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS942IPT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,145
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Product details
Overview
TS942IPT from STMicroelectronics is a dual rail-to-rail output micropower operational amplifier in TSSOP-8 package, operating from 2.5 V to 10 V with 1.2 µA supply current per amplifier, 10 kHz gain bandwidth, and 1 pA typical input bias current. It targets ultra-low-power sensor signal conditioning in battery-powered smoke detectors and portable pH meters.
For engineers reviewing the TS942IPT datasheet, TS942IPT pinout, TS942IPT application, or TS942IPT equivalent, this page delivers verified electrical specs, real-world use cases, validated alternatives, and supply-chain support - all grounded in ST's Doc ID 6972 Rev 6.
Technical Context
The TS942IPT implements a CMOS-input, rail-to-rail output op-amp architecture optimized for single-supply operation across -40°C to +85°C. Its 1.2 µA quiescent current remains stable over 2.5–10 V supply range, enabling reliable performance at end-of-battery voltage.
It achieves 10 kHz gain-bandwidth product with 65° phase margin (CL = 50 pF), supports ±100 mV differential input, and delivers 2.85 V high-level output at 3 V supply into 10 kΩ load - critical for analog front-end accuracy in low-voltage sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA per amplifier - enables multi-year battery life in coin-cell–powered devices |
| Input Bias Current | 1 pA typical - preserves signal integrity 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 typical - rejects common-mode noise in noisy industrial or automotive sensor environments |
| ESD Protection | 2 kV HBM - ensures robustness during PCB handling and field deployment |
| Operating Temp | -40°C to +85°C - qualified for use in fire alarm enclosures and outdoor portable instruments |
Pinout & Package
TSSOP-8 package: 3 mm × 4.4 mm body, 0.65 mm pitch, 1.05 mm max height, lead-free ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail voltage swing; drives 10 kΩ load to within 150 mV of rails at 3 V |
| 2 (IN− A) | Inverting input A | Accepts differential signals up to ±VCC; 1 pA bias current minimizes error in high-Z sources |
| 3 (IN+ A) | Non-inverting input A | Common-mode range extends to VDD − 0.2 V and VCC − 1.3 V - supports single-supply sensor biasing |
| 4 (V−) | Negative supply / ground | Reference node for dual-supply operation or ground return in single-supply configurations |
| 5 (IN+ B) | Non-inverting input B | Independent channel input; identical CMR and bias specs as Channel A |
| 6 (IN− B) | Inverting input B | Supports differential or single-ended configuration for second sensor channel |
| 7 (OUT B) | Amplifier B output | Matched rail-to-rail performance to OUT A; enables dual-channel signal conditioning |
| 8 (V+) | Positive supply | Accepts 2.5–10 V; supply current flat across range - simplifies power design across battery discharge |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Enables full 0–3 V output swing at 3 V supply, maximizing resolution when interfacing to 10-bit ADCs |
| Micropower operation | 1.2 µA per amplifier allows continuous monitoring in battery-powered alarms with >5-year shelf life |
| Ultra-low input bias current | 1 pA typical eliminates voltage drop across >1 GΩ pH probe electrodes, preserving measurement accuracy |
| Latch-up immunity | Class A rating ensures immunity to transient-induced latch-up in unregulated battery systems |
| Single-supply compatible | Operates down to 2.5 V with input common-mode range including ground - eliminates need for level-shifting |
Applications
| Smoke Detector Signal Conditioning | pH Meter Front-End Amplifier |
|---|---|
Use Scenario: Amplifying weak ion-current signals from electrochemical smoke sensors under 3 V coin-cell power. IC Role / Device Role / Timing Role: Dual-channel op-amp providing low-noise, rail-to-rail gain stage before 12-bit SAR ADC sampling at 100 Hz. Use Value: 1.2 µA quiescent current extends detector battery life beyond EN 14604 requirements; 1 pA bias prevents drift in microamp-level sensor currents. |
Use Scenario: Buffering high-impedance glass electrode output (≥1 GΩ) in handheld pH meters powered by two AAA cells. IC Role / Device Role / Timing Role: Non-inverting unity-gain buffer isolating electrode from ADC input; operates continuously during measurement. Use Value: Rail-to-rail output delivers full 0–2.85 V range at 3 V supply, matching ADC reference; 1 pA bias avoids >10 mV offset error at 100 MΩ source impedance. |
| Portable Gas Sensor Interface | Battery-Powered Instrumentation Logger |
Use Scenario: Conditioning output of metal-oxide semiconductor (MOS) gas sensors in wearable air-quality monitors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting nanoamp-level sensor current to voltage; dual channel supports CO and NO₂ simultaneously. Use Value: Stable 10 kHz GBW ensures accurate response to step changes in gas concentration; 85 dB CMRR rejects switching noise from integrated BLE radio. |
Use Scenario: Low-power analog front-end for temperature/humidity data loggers recording every 5 minutes on CR2032 battery. IC Role / Device Role / Timing Role: Dual op-amp performing sensor excitation (constant-current source) and signal amplification in duty-cycled mode. Use Value: Supply current flat across 2.5–10 V allows direct connection to battery without regulation; latch-up immunity prevents failure during cold-temperature startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS942IDT | SO-8 package, same electrical specs, 125 °C/W RthJA vs. 120 °C/W for TSSOP-8 | Preferred for through-hole prototyping or higher thermal mass PCBs; larger footprint | Select when board space permits and manual soldering is required |
| MCP6022-E/SN | Higher supply current (100 µA), wider GBW (1 MHz), but same rail-to-rail output and 1 pA Iib | Suitable for higher-speed sensor interfaces (e.g., ultrasonic transducers), not ultra-low-power logging | Choose only if bandwidth >10 kHz is needed and battery life is secondary |
Compared with TS942IPT, TS942IDT offers identical performance in a larger SO-8 package for easier assembly, while MCP6022-E/SN trades 83× higher supply current for 100× greater bandwidth - making TS942IPT optimal for multi-year battery operation where speed is non-critical.
Availability
TS942IPT is available at Aetrix Electronics and suitable for battery-powered smoke detectors, portable pH meters, gas sensor modules, and low-duty-cycle instrumentation loggers requiring stable component supply across extended production lifecycles.
Supply support for TS942IPT 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, designing and manufacturing analog, MCU, 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 ultra-low-quiescent-current signal conditioning in energy-constrained portable and safety-critical sensing applications.
FAQ
What is the maximum recommended supply voltage for TS942IPT?
The absolute maximum supply voltage is 12 V, but the device is characterized and guaranteed for operation between 2.5 V and 10 V. Operating above 10 V voids parametric guarantees and risks exceeding junction temperature limits due to increased power dissipation in the TSSOP-8 package.
Does TS942IPT support true rail-to-rail input?
No - TS942IPT 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 it cannot accept inputs within 1.3 V of the positive rail. This is typical for CMOS-input op-amps optimized for micropower.
Can TS942IPT drive a 10 kΩ load at 3 V supply?
Yes - at VCC = 3 V and RL = 10 kΩ, the typical high-level output voltage is 2.85 V and low-level is 150 mV, confirming rail-to-rail capability into that load. Output current capability is ±650 µA (sink/source) under those conditions.
Is TS942IPT qualified for automotive applications?
No - TS942IPT is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. ST does not recommend or warrant its use in automotive safety systems; for such applications, consider ST's TSZ12x or TSV91x automotive-grade op-amp families.
TS942IPT 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:
- 10 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
TS942IPT FAQ
1.How can I place an order for TS942IPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS942IPT 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 TS942IPT reliable?
The price and inventory of TS942IPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS942IPT is usually 5 days.
3.What payment methods are accepted for TS942IPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS942IPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS942IPT?
TS942IPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS942IPT 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 TS942IPT?
For technical support, including TS942IPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS942IPT requirements.
6.How does Aetrix verify that TS942IPT is sourced from the original manufacturer or authorized distributors?
All TS942IPT 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 TS942IPT meets industry standards.
7.What is the process for return or replacement of TS942IPT?
All TS942IPT units undergo pre-shipment inspection (PSI). If there is an issue with TS942IPT, 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 TS942IPT part is unused and in its original packaging.
Return procedure for TS942IPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS942IPT Tags
-
LM358DT
STMicroelectronics
-
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
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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