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STMicroelectronics TS942BIN
- Part No.:
- TS942BIN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TS942BIN.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
TS942BIN 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, 1 pA input bias current, and rail-to-rail output swing (e.g., 2.85 V at 3 V with 10 kΩ load), enabling precision signal conditioning in low-power smoke detectors and portable pH meters.
For engineers reviewing the TS942BIN datasheet, TS942BIN pinout, TS942BIN application, or TS942BIN equivalent, this device is selected for ultra-low quiescent current, CMOS input stage integrity, and stable operation across 2.5–10 V supply range in temperature-critical instrumentation and safety-sensing circuits.
Technical Context
The TS942BIN integrates two independent CMOS-input op-amps in a single SOT23-5 package, each featuring rail-to-rail output stage capable of sourcing/sinking up to 1.3 mA at 5 V while maintaining 1.2 µA ICC over full supply voltage range. Its 1 pA typical input bias current and 7 µV/°C offset drift support high-impedance sensor interfacing without significant error accumulation.
Designed for single-supply operation from 2.5 V to 10 V, it achieves 85 dB common-mode rejection and 85 dB supply voltage rejection at 5 V, with phase margin of 65° into 50 pF capacitive load - ensuring stability in low-noise analog front-ends without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA per amplifier - enables multi-year battery life in coin-cell-powered sensors. |
| Input Bias Current | 1 pA typical - preserves accuracy when amplifying signals from high-impedance pH electrodes or photodiodes. |
| Gain Bandwidth | 10 kHz - sufficient for DC-coupled sensor signal conditioning and slow-varying industrial monitoring. |
| Output Swing | Rail-to-rail - delivers full dynamic range at 3 V supply (2.85 V high / 0.1 V low into 10 kΩ). |
| CMRR / PSRR | 85 dB / 85 dB at 5 V - rejects noise from shared power rails and common-mode interference in compact PCB layouts. |
| Operating Temp | -40°C to +85°C - qualified for use in fire/smoke detectors deployed in uncontrolled ambient environments. |
| ESD Rating | 2 kV HBM - provides robustness during handling and assembly in low-volume instrumentation manufacturing. |
Pinout & Package
SOT23-5 package: 5-pin surface-mount, 2.9 mm × 1.6 mm footprint, 1.3 mm height, ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts differential signal reference for first op-amp channel; high-impedance CMOS node. |
| 2 | Non-inverting Input (Amplifier A) | High-Z input for sensor signal routing; 1 pA leakage ensures minimal loading on resistive dividers. |
| 3 | Ground / Negative Supply | Reference return path for both amplifiers; must be low-impedance to maintain PSRR performance. |
| 4 | Output (Amplifier A) | Rail-to-rail capable output driving 10 kΩ loads to within 150 mV of rails at 3 V supply. |
| 5 | Positive Supply | Single-supply input (2.5–10 V); supplies both amplifiers; current draw remains constant vs. voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers full 0–VCC dynamic range at 3 V supply, maximizing ADC resolution in 8-bit microcontroller systems. |
| Micropower operation | 1.2 µA per amplifier enables >10-year operation on CR2032 cells in intermittent-sampling smoke detectors. |
| Ultra-low input bias | 1 pA typical eliminates offset errors in pH meter electrode buffers where source impedance exceeds 100 MΩ. |
| Single-supply compatible | Operates down to 2.5 V - supports direct integration with Li-ion or alkaline battery stacks without LDO pre-regulation. |
| Latch-up immunity | Class A rating ensures survival during transient overvoltage events in field-deployed safety equipment. |
Applications
| Smoke Detector Signal Conditioning | pH Electrode Buffer Amplifier |
|---|---|
Use Scenario: Amplifying weak ion-current signals from electrochemical smoke sensing chambers under battery-limited power budget. IC Role / Device Role / Timing Role: Dual-channel op-amp providing transimpedance gain and reference-level shifting for analog-to-digital conversion. Use Value: 1.2 µA quiescent current extends detector battery life beyond 10 years; rail-to-rail output ensures full utilization of 3 V ADC input range. |
Use Scenario: Buffering high-impedance glass pH electrode outputs in handheld water quality testers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating electrode from measurement circuitry while preserving mV-level accuracy. Use Value: 1 pA input bias prevents electrode polarization drift; CMOS inputs avoid leakage-induced calibration drift over time. |
| Portable Gas Sensor Front-End | Battery-Powered Alarm System Comparator |
Use Scenario: Conditioning output from metal-oxide semiconductor (MOS) gas sensors in wearable air quality monitors. IC Role / Device Role / Timing Role: Low-noise amplifier stage converting sensor resistance changes into measurable voltage deviations. Use Value: 85 dB CMRR rejects supply ripple from shared battery rail; stable 10 kHz GBW supports response to rapid CO concentration shifts. |
Use Scenario: Threshold detection in low-power home security alarm panels powered by AA batteries. IC Role / Device Role / Timing Role: Precision comparator driver feeding logic-level signals to microcontroller wake-up interrupt pins. Use Value: Rail-to-rail output guarantees clean TTL-compatible transitions at 2.5 V supply; 2 kV ESD protects against user-handling discharge. |
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 |
|---|---|---|---|
| TS942ID | SO-8 package, same electrical specs, higher thermal resistance (125 °C/W vs. 250 °C/W). | Preferred for prototyping or through-hole assembly; less suitable for space-constrained portable designs. | Select when board layout allows larger footprint and thermal management via copper pour is feasible. |
| MCP6002T-I/SN | Higher supply current (1 µA vs. 1.2 µA), lower GBW (1 MHz vs. 10 kHz), wider supply range (1.8–6 V). | Better suited for higher-speed sensor interfaces but less optimal for ultra-low-power long-life deployments. | Choose only if system requires faster settling or operates below 2.5 V; otherwise TS942BIN offers superior battery longevity. |
Compared with TS942ID and MCP6002T-I/SN, the TS942BIN uniquely balances sub-1.5 µA quiescent current, true rail-to-rail output at 2.5 V, and 1 pA input bias in the smallest SOT23-5 form factor - making it the optimal choice for miniaturized, decade-life battery-powered safety sensors.
Availability
TS942BIN is available at Aetrix Electronics and suitable for smoke/fire detectors, portable pH meters, battery-powered alarm systems, and gas sensor front-ends requiring stable component supply across extended production lifecycles.
Supply support for TS942BIN 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 automotive, industrial, and consumer markets since 1987.
The TS94x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power signal conditioning in safety-critical and battery-operated instrumentation where energy efficiency and long-term stability are non-negotiable.
FAQ
What is the maximum supply voltage for TS942BIN?
The absolute maximum supply voltage is 12 V, but the recommended operating range is 2.5 V to 10 V per the datasheet. Operation above 10 V risks exceeding safe junction temperature limits and degrading long-term reliability, especially in the thermally constrained SOT23-5 package.
Does TS942BIN support dual-supply operation?
No - TS942BIN is designed exclusively for single-supply operation. Its input common-mode range extends from VDD − 0.2 V to VCC − 1.3 V, and its rail-to-rail output is specified only with respect to a single positive rail and ground. Dual-supply use is not characterized or guaranteed.
Can TS942BIN drive capacitive loads directly?
It is stable with up to 50 pF capacitive load per the datasheet's phase margin test condition. Driving larger capacitive loads (e.g., >100 pF) may cause peaking or oscillation; a series resistor (≥100 Ω) should be added between output and load to restore stability without compromising DC accuracy.
Is TS942BIN RoHS and REACH compliant?
Yes - TS942BIN carries STMicroelectronics' ECOPACK® designation, confirming compliance with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full material declarations and substance reports are available via ST's official product page and authorized distributor portals.
TS942BIN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 2 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:
- Through Hole
- Supplier Device Package:
- 8-DIP
TS942BIN FAQ
1.How can I place an order for TS942BIN through Aetrix?
Please submit a Request for Quotation (RFQ) for TS942BIN 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 TS942BIN reliable?
The price and inventory of TS942BIN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS942BIN is usually 5 days.
3.What payment methods are accepted for TS942BIN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS942BIN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS942BIN?
TS942BIN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS942BIN 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 TS942BIN?
For technical support, including TS942BIN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS942BIN requirements.
6.How does Aetrix verify that TS942BIN is sourced from the original manufacturer or authorized distributors?
All TS942BIN 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 TS942BIN meets industry standards.
7.What is the process for return or replacement of TS942BIN?
All TS942BIN units undergo pre-shipment inspection (PSI). If there is an issue with TS942BIN, 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 TS942BIN part is unused and in its original packaging.
Return procedure for TS942BIN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS942BIN 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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