My Inquiry
My Account
STMicroelectronics TS942IDT
- Part No.:
- TS942IDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS942IDT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,662
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS942IDT 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 TS942IDT datasheet, TS942IDT pinout, TS942IDT application, or TS942IDT equivalent, this page provides verified electrical specifications, SOT23-5 package details, real-world use cases in gas sensing and pH measurement, and validated alternative op-amps with documented offset voltage and supply current differences.
Technical Context
The TS942IDT integrates two independent CMOS-input op-amps in a single SOT23-5 package, each featuring ultra-low input bias current (1 pA typ) and rail-to-rail output stage capable of sourcing/sinking up to 1.5 mA at 5 V. Its constant 1.2 µA supply current across 2.5–10 V supply range ensures stable operation during battery discharge.
Designed for -40°C to +85°C industrial temperature operation, it achieves 85 dB common-mode rejection ratio and 78 dB supply voltage rejection ratio at 5 V, supporting high-accuracy DC-coupled sensor interfaces where input offset drift (7 µV/°C) and low-noise amplification are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA per amplifier - enables multi-year operation on coin-cell batteries in wireless sensors. |
| Input Bias Current | 1 pA typical - preserves signal integrity when interfacing high-impedance pH electrodes or photodiode sensors. |
| Gain Bandwidth Product | 10 kHz - sufficient for DC to low-frequency sensor signal conditioning (e.g., thermistor, gas sensor outputs). |
| Rail-to-Rail Output | Swings within 100 mV of rails at 3 V - maximizes dynamic range in 3 V microcontroller ADC front-ends. |
| Input Offset Voltage | 10 mV max (TS942) - supports <1% accuracy in 100 mV full-scale analog inputs without trimming. |
| Common-Mode Rejection | 85 dB - rejects noise from shared ground paths in battery-powered alarm control panels. |
| ESD Protection | 2 kV HBM - withstands handling and board-level ESD events in portable device assembly lines. |
Pinout & Package
SOT23-5 package: 2.9 mm × 1.6 mm × 1.1 mm body, 0.95 mm lead pitch, RoHS-compliant ECOPACK® grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts feedback or differential signal; high-impedance CMOS node (1 pA bias). |
| 2 | Non-Inverting Input (Amplifier A) | Connects to reference or sensor; immune to supply ripple due to 78 dB SVR. |
| 3 | Ground / Negative Supply | Reference for single-supply operation; must be low-impedance to avoid CMR degradation. |
| 4 | Output (Amplifier A) | Drives 10 kΩ loads to within 100 mV of rails; capable of 1.5 mA sink/source at 5 V. |
| 5 | Positive Supply | Accepts 2.5–10 V; supply current remains stable across this range for predictable battery life. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full 3 V output swing on 3 V supply - eliminates need for level-shifting in MCU ADC interfaces. |
| Micropower consumption | 1.2 µA per amplifier - reduces quiescent power by >95% vs. standard rail-to-rail op-amps (e.g., LMV358). |
| Ultra-low input bias current | 1 pA typical - prevents voltage error in high-Z pH probe circuits (>1 GΩ source impedance). |
| Latch-up immunity (Class A) | Withstands 200 mA transient overcurrent - protects against short-circuit faults in smoke detector alarm drivers. |
| Single-supply operation | 2.5–10 V range - operates directly from alkaline, lithium, or rechargeable cells without regulation. |
Applications
| Smoke/Gas Detectors | pH Measurement Systems |
|---|---|
|
Use Scenario: Amplifying low-current signals from electrochemical gas sensors in battery-powered residential CO alarms. IC Role / Device Role / Timing Role: Dual op-amp configures transimpedance amplifier (Channel A) and reference buffer (Channel B) for stable sensor biasing. Use Value: 1.2 µA quiescent current extends 9V battery life to >2 years; rail-to-rail output ensures full ADC utilization at 3.3 V MCU supply. |
Use Scenario: Conditioning mV-level output from glass pH electrodes in handheld field meters. IC Role / Device Role / Timing Role: First-stage amplifier with guard-driven input to minimize leakage-induced offset drift. Use Value: 1 pA input bias current limits measurement error to <0.1 pH unit over 0–14 pH range; 85 dB CMRR rejects common-mode noise from AC-powered reference electrodes. |
| Battery-Powered Alarms | Portable Instrumentation |
|
Use Scenario: Signal conditioning in wireless fire alarm nodes powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Dual configuration supports both sensor interface and comparator hysteresis generation. Use Value: Stable 1.2 µA supply current across 2.5–3.3 V battery discharge curve enables accurate end-of-life prediction; 2 kV HBM ESD rating survives field handling. |
Use Scenario: Front-end amplification in handheld multimeters measuring µA-range currents via shunt resistors. IC Role / Device Role / Timing Role: Precision buffer isolating high-impedance DMM input from internal ADC reference. Use Value: 10 mV max input offset ensures <0.5% reading accuracy at 100 mV full scale; 7 µV/°C drift maintains calibration over operating temperature range. |
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 |
|---|---|---|---|
| TS942AIDT | 5 mV max input offset voltage (vs. 10 mV for TS942IDT); same 1.2 µA supply current and 1 pA bias current. | Preferred for pH meter front-ends requiring <0.5% DC accuracy without calibration. | Select when tighter initial offset is required and cost premium is acceptable. |
| TS942BIDT | 2 mV max input offset voltage; identical micropower and rail-to-rail performance. | Suitable for medical-grade portable sensors where offset stability dominates design margin. | Choose for highest DC precision in battery-constrained diagnostics equipment. |
Compared with TS942IDT, TS942AIDT and TS942BIDT offer progressively lower input offset voltage (5 mV and 2 mV max) while retaining identical micropower consumption, rail-to-rail output, and 1 pA input bias current - making them drop-in upgrades for applications demanding higher DC accuracy without changing supply or layout constraints.
Availability
TS942IDT is available at Aetrix Electronics and suitable for battery-powered alarms, portable instrumentation, smoke/gas detectors, and pH measurement systems requiring stable component supply across extended production lifecycles.
Supply support for TS942IDT 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 ultra-low-power sensor signal conditioning in battery-operated safety and measurement devices.
FAQ
What is the maximum supply voltage for TS942IDT?
The absolute maximum supply voltage is 12 V, but the recommended operating range is 2.5 V to 10 V. Operation above 10 V risks exceeding thermal limits in the SOT23-5 package, especially under load; sustained 12 V operation is not characterized and may degrade long-term reliability.
Does TS942IDT support dual-supply operation?
No - TS942IDT is specified only for single-supply operation from 2.5 V to 10 V, with input common-mode range extending from VDD − 0.2 V to VCC − 1.3 V. It lacks symmetric rail capability and is not characterized for split-supply configurations like ±2.5 V.
Can TS942IDT drive a 10 kΩ load rail-to-rail at 3 V?
Yes - at 3 V supply and 25°C, the output swings to 2.85 V (high) and 100 mV (low) into 10 kΩ, meeting rail-to-rail specification. Performance degrades slightly at temperature extremes: low-level output rises to 200 mV at +85°C, still usable for most 3 V ADC interfaces.
Is the TS942IDT pinout compatible with other SOT23-5 op-amps?
TS942IDT uses standard SOT23-5 pinout (1: In−, 2: In+, 3: GND, 4: Out, 5: VCC), matching industry convention. However, functional compatibility requires verification of input bias current, supply current, and output drive - e.g., while LMV721IDBVR shares the pinout, its 25 nA bias current makes it unsuitable for pH electrode interfaces.
TS942IDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SOIC
TS942IDT FAQ
1.How can I place an order for TS942IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS942IDT 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 TS942IDT reliable?
The price and inventory of TS942IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS942IDT is usually 5 days.
3.What payment methods are accepted for TS942IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS942IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS942IDT?
TS942IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS942IDT 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 TS942IDT?
For technical support, including TS942IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS942IDT requirements.
6.How does Aetrix verify that TS942IDT is sourced from the original manufacturer or authorized distributors?
All TS942IDT 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 TS942IDT meets industry standards.
7.What is the process for return or replacement of TS942IDT?
All TS942IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS942IDT, 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 TS942IDT part is unused and in its original packaging.
Return procedure for TS942IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS942IDT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
