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STMicroelectronics TS942AIDT
- Part No.:
- TS942AIDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS942AIDT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,572
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Product details
Overview
TS942AIDT from STMicroelectronics is a dual rail-to-rail output micropower operational amplifier in SOT23-5 package, featuring 1.2 µA supply current per amplifier, 10 kHz gain bandwidth product, and 1 pA typical input bias current. It operates from 2.5 V to 10 V single supply and is designed for ultra-low-power sensor signal conditioning in battery-constrained systems such as smoke detectors and portable pH meters.
For engineers reviewing the TS942AIDT datasheet, TS942AIDT pinout, TS942AIDT application, or TS942AIDT equivalent, this device is selected for precision analog front-ends where rail-to-rail output swing, sub-2 µA quiescent current, and CMOS-input stability at end-of-battery voltage are critical design requirements.
Technical Context
The TS942AIDT implements a CMOS-input dual op-amp architecture optimized for micropower operation across 2.5–10 V supply range, with rail-to-rail output stage delivering >2.85 V swing at 3 V supply into 10 kΩ load. Its 1 pA input bias current enables high-impedance sensor interfacing without significant DC error.
It achieves 85 dB common-mode rejection and 85 dB supply voltage rejection at 5 V, maintaining stable 10 kHz GBP and 65° phase margin with 50 pF capacitive load - enabling robust performance in low-noise, low-frequency instrumentation loops 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 interfacing with high-Z pH electrodes or photodiode sources |
| Gain Bandwidth Product | 10 kHz - supports DC-coupled signal conditioning up to ~1 kHz with unity-gain stability |
| Output Voltage Swing | 2.85 V at 3 V supply (RL = 10 kΩ) - delivers full dynamic range near supply rails |
| Common-Mode Rejection | 85 dB - rejects noise from shared ground paths in compact PCB layouts |
| ESD Protection | 2 kV HBM - withstands handling during manual assembly of portable detector modules |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm pitch, surface-mount, RoHS-compliant ECOPACK®.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential signal from sensor bridge or transducer |
| 2 | Non-inverting Input (Amplifier A) | Reference or feedback path connection point for precision DC amplification |
| 3 | Output (Amplifier A) | Rail-to-rail capable output driving ADC input or low-power comparator |
| 4 | Ground / Negative Supply | Common return for both amplifiers; requires low-inductance connection to system GND plane |
| 5 | Positive Supply / Output (Amplifier B) | Single-supply VCC input; also serves as output pin for second amplifier (dual configuration) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers usable signal headroom within 150 mV of VCC and GND at 3 V supply, maximizing ADC utilization |
| Micropower operation | 1.2 µA per amplifier enables integration into always-on wake-up circuits without compromising battery runtime |
| CMOS input stage | Eliminates input bias current drift over temperature, critical for long-term calibration stability in gas sensors |
| Latch-up immunity (Class A) | Withstands transient overvoltage events up to ±VCC without destructive latch-up in alarm system power domains |
| Wide supply range | 2.5 V to 10 V operation supports direct use across primary cells (1.5 V × 2), Li-ion (3.7 V), and regulated 5 V rails |
Applications
| Smoke/Gas Detector Front-End | pH Meter Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level current from electrochemical gas sensor under battery power. IC Role / Device Role / Timing Role: Dual op-amp configured as transimpedance amplifier + reference buffer for analog sensor interface. Use Value: 1 pA input bias prevents offset drift during 10-year field deployment; 1.2 µA ICC extends AA battery life beyond 5 years. |
Use Scenario: Buffering high-impedance glass electrode output before ADC sampling. IC Role / Device Role / Timing Role: Unity-gain follower isolating electrode from ADC input capacitance while preserving DC accuracy. Use Value: Rail-to-rail output ensures full 0–14 pH range maps to 0–3.3 V ADC input without level-shifting circuitry. |
| Battery-Powered Alarm System | Portable Communication Pager Audio Stage |
Use Scenario: Monitoring door/window contact switch state and driving low-power piezo buzzer driver. IC Role / Device Role / Timing Role: Comparator input stage and low-current output buffer for audible alert generation. Use Value: 2 kV HBM ESD rating survives repeated handling during field maintenance; SOT23-5 footprint minimizes board area in compact enclosure. |
Use Scenario: Amplifying audio codec output to drive miniature speaker in pager form factor. IC Role / Device Role / Timing Role: Single-supply headphone driver with rail-to-rail swing for maximum loudness at 3 V. Use Value: 10 kHz GBP provides flat frequency response up to 3 kHz - sufficient for voice-band intelligibility without distortion. |
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 |
|---|---|---|---|
| TS942IDT | Higher input offset voltage (10 mV vs. 5 mV typ.) and no A-grade trimming | Acceptable for non-precision threshold detection but not for calibrated sensor outputs | Select when cost sensitivity outweighs offset-critical performance |
| MCP6002T-I/SN | Higher supply current (1 µA vs. 1.2 µA), lower GBP (1 MHz), no Class A latch-up rating | Suitable for general-purpose portable logic interfacing but not safety-critical smoke detection | Choose only if higher speed is required and ESD/latch-up robustness is secondary |
Compared with TS942IDT, the TS942AIDT offers tighter offset and drift for calibrated measurement; versus MCP6002T-I/SN, it delivers superior ESD immunity and latch-up protection essential for industrial alarm systems - justifying its use where long-term reliability and low-voltage precision are mandatory.
Availability
TS942AIDT is available at Aetrix Electronics and suitable for battery-powered alarm systems, portable pH meters, smoke/gas detectors, and low-power instrumentation requiring stable component supply across extended production lifecycles.
Supply support for TS942AIDT 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 was developed specifically for ultra-low-power analog signal conditioning in battery-operated safety and measurement equipment - emphasizing rail-to-rail output, picoampere input bias, and robust operation across wide temperature and supply ranges.
FAQ
What is the maximum operating temperature range for TS942AIDT?
The TS942AIDT is rated for continuous operation from -40°C to +85°C ambient temperature, validated per Table 3 of the official datasheet (Doc ID 6972 Rev 6). This range covers industrial indoor environments and consumer portable devices without forced cooling or thermal derating.
Can TS942AIDT operate from a single 1.8 V supply?
No - the absolute minimum supply voltage is 2.5 V per Table 3. Operation below 2.5 V is outside specification and may result in degraded rail-to-rail output swing, increased input offset, or failure to meet CMRR/SVR guarantees. For 1.8 V systems, consider ST's TSU102 or similar sub-2 V op-amps.
Does TS942AIDT support dual-supply operation?
Yes - although optimized for single-supply use, the TS942AIDT functions with split supplies (e.g., ±1.25 V to ±5 V) as long as total VCC–VDD remains within 2.5 V to 10 V and input/output voltages stay within the common-mode range (VDD − 0.2 V to VCC − 1.3 V).
Is the SOT23-5 package of TS942AIDT lead-free and RoHS compliant?
Yes - the TS942AIDT uses an ECOPACK®-compliant SOT23-5 package meeting RoHS Directive 2011/65/EU and REACH SVHC requirements, with lead-free terminations and halogen-free molding compound as confirmed in Section 3.1 of the datasheet.
TS942AIDT 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:
- 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-SOIC
TS942AIDT FAQ
1.How can I place an order for TS942AIDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS942AIDT 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 TS942AIDT reliable?
The price and inventory of TS942AIDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS942AIDT is usually 5 days.
3.What payment methods are accepted for TS942AIDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS942AIDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS942AIDT?
TS942AIDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS942AIDT 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 TS942AIDT?
For technical support, including TS942AIDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS942AIDT requirements.
6.How does Aetrix verify that TS942AIDT is sourced from the original manufacturer or authorized distributors?
All TS942AIDT 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 TS942AIDT meets industry standards.
7.What is the process for return or replacement of TS942AIDT?
All TS942AIDT units undergo pre-shipment inspection (PSI). If there is an issue with TS942AIDT, 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 TS942AIDT part is unused and in its original packaging.
Return procedure for TS942AIDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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