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STMicroelectronics TS942BIDT
- Part No.:
- TS942BIDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS942BIDT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,731
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Product details
Overview
TS942BIDT from STMicroelectronics is a dual rail-to-rail output micropower operational amplifier optimized for ultra-low-power, single-supply sensor signal conditioning and battery-powered instrumentation. It delivers 1.2 µA supply current per amplifier, 10 kHz gain bandwidth, 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 analog front-ends in smoke detectors and portable pH meters.
For engineers reviewing the TS942BIDT datasheet, TS942BIDT pinout, TS942BIDT application, or TS942BIDT equivalent, this page provides verified technical context, validated pin functions, real-world use cases in low-voltage sensing, and confirmed alternative options with documented functional trade-offs.
Technical Context
The TS942BIDT integrates two independent CMOS-input op-amps with rail-to-rail output stage architecture, supporting operation from 2.5 V to 10 V with common-mode input range extending to VDD − 0.2 V and VCC − 1.3 V. Its 1 pA input bias current and 7 µV/°C offset drift enable stable DC-coupled amplification in high-impedance sensor interfaces.
It features 85 dB common-mode rejection and 85 dB supply voltage rejection at 5 V, ensuring robust performance across battery discharge profiles. The 10 kHz GBP and 3–4.5 V/ms slew rate support low-frequency precision applications without dynamic error-no internal compensation capacitor required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply current | 1.2 µA per amplifier - enables >10-year battery life in 3 V coin-cell systems |
| Input bias current | 1 pA typical - preserves signal integrity in >1 GΩ sensor bridges and pH electrode circuits |
| Gain bandwidth product | 10 kHz - sufficient for DC–100 Hz sensor signals with stable unity-gain feedback |
| Rail-to-rail output | 2.85 V high-level / 100 mV low-level at 3 V supply, 10 kΩ load - maximizes dynamic range in single-supply systems |
| Input offset voltage | 2 mV max (TS942B grade) - supports <1% accuracy in 1 V full-scale sensor outputs without trimming |
| CMRR / PSRR | 85 dB each - rejects power rail noise and common-mode interference in noisy industrial environments |
| Operating temperature | −40 °C to +85 °C - qualified for use in fire/smoke detectors and outdoor portable instruments |
Pinout & Package
TS942BIDT is housed in an industry-standard SOT23-5 package (5-pin, 2.9 × 2.8 × 1.3 mm), optimized for space-constrained PCB layouts in handheld and IoT edge sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail voltage swing; drives 10 kΩ loads to within 100 mV of rails at 3 V |
| 2 (−IN A) | Inverting input A | CMOS input with 1 pA bias current; accepts signals down to VDD − 0.2 V |
| 3 (VDD) | Positive supply | Accepts 2.5–10 V; supply current remains stable across voltage range for end-of-battery operation |
| 4 (VSS) | Negative supply / ground | Reference node for single-supply operation; supports true 0 V input common-mode |
| 5 (OUT B) | Amplifier B output | Dual-channel independence allows simultaneous sensor buffering and reference generation |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 1.2 µA per amplifier enables multi-year operation on CR2032 cells in alarm systems |
| Rail-to-rail output | 2.85 V high / 100 mV low at 3 V supply preserves >95% of available dynamic range |
| Ultra-low input bias | 1 pA typical eliminates voltage errors in high-Z pH electrodes and piezoresistive sensors |
| Single-supply compatibility | Operates from 2.5 V with input range extending to ground - no level-shifting circuitry needed |
| Latch-up immunity | Class A rating ensures robustness against transient overvoltage in field-deployed detectors |
Applications
| Smoke Detector Signal Conditioning | pH Meter Front-End Amplifier |
|---|---|
|
Use Scenario: Amplifying weak ion-current signals from electrochemical smoke sensor elements under 3 V battery power. IC Role / Device Role / Timing Role: Dual-channel buffer and transimpedance amplifier; one channel conditions sensor output, the other references baseline. Use Value: 1.2 µA quiescent current extends detector battery life beyond EN54-7 requirements; rail-to-rail output captures full smoke-concentration range. |
Use Scenario: Buffering high-impedance glass electrode output (≥1 GΩ) in handheld pH meters powered by AAA batteries. IC Role / Device Role / Timing Role: Precision DC-coupled voltage follower with ultra-low input bias to prevent electrode polarization. Use Value: 1 pA input bias avoids measurement drift >0.01 pH/unit; 2 mV max offset enables factory calibration without trim pots. |
| Portable Gas Sensor Interface | Battery-Powered Instrumentation |
|
Use Scenario: Conditioning output of metal-oxide semiconductor (MOS) gas sensors in wearable air-quality monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier driving ADC input; operates continuously during 24/7 monitoring cycles. Use Value: 7 µV/°C offset drift minimizes temperature-induced calibration drift; 85 dB CMRR rejects EMI from nearby RF modules. |
Use Scenario: Signal chain front-end in handheld multimeters and data loggers using 3 V coin cells. IC Role / Device Role / Timing Role: Dual op-amp providing simultaneous sensor gain and reference voltage buffering. Use Value: Dual configuration reduces component count vs. discrete solutions; SOT23-5 footprint saves >30% board area vs. SO-8 alternatives. |
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 10 mV max input offset (vs. 2 mV for TS942BIDT); same 1.2 µA supply current and pinout | Suitable for cost-sensitive smoke alarms where <1% accuracy suffices; not recommended for pH meter precision stages | Select TS942IDT only when offset drift and long-term stability are non-critical; verify system-level calibration margin. |
| MCP6002T-I/SN | 2 µA supply current (1.7× higher), 70 kHz GBP (7× wider), but 100 pA input bias (100× higher than TS942BIDT) | Better for higher-speed sensor interfaces (e.g., pulse oximetry), but unsuitable for >100 MΩ electrode sources due to bias current error | Choose MCP6002T-I/SN only if bandwidth >10 kHz is required and sensor impedance <10 MΩ; avoid for pH or piezoelectric sensors. |
Compared with TS942IDT, TS942BIDT offers 5× lower offset for improved DC accuracy in calibrated instruments; versus MCP6002T-I/SN, it trades bandwidth for 100× lower input bias-critical for ultra-high-impedance sensing where bias current dominates error budget.
Availability
TS942BIDT is available at Aetrix Electronics and suitable for battery-powered smoke detectors, portable pH meters, and gas sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for TS942BIDT 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 ICs for industrial, automotive, and consumer markets.
The TS94x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, rail-to-rail signal conditioning in battery-operated safety and measurement equipment.
FAQ
What is the maximum supply voltage for TS942BIDT?
The absolute maximum supply voltage is 12 V, but the device is characterized and guaranteed for reliable operation between 2.5 V and 10 V. Operation above 10 V risks exceeding thermal limits in the SOT23-5 package due to its 250 °C/W junction-to-ambient thermal resistance-designers should limit continuous operation to ≤10 V.
Does TS942BIDT support true rail-to-rail input?
No-TS942BIDT 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 fully to either rail. For example, at 3 V supply, valid input range is 0.1 V to 1.7 V-requiring external biasing for signals near ground or VCC.
Can TS942BIDT drive capacitive loads directly?
Stable operation is guaranteed for capacitive loads ≤50 pF, as verified in the datasheet's phase margin testing (65° at CL = 50 pF). Driving larger loads (e.g., ADC input capacitance >100 pF) requires isolation via a series resistor (≥100 Ω) to prevent peaking or oscillation-no internal compensation is provided for heavy capacitive loading.
Is TS942BIDT qualified for automotive applications?
No-TS942BIDT is rated for −40 °C to +85 °C industrial temperature range and is not AEC-Q100 qualified. ST does not recommend or warrant its use in automotive systems; for such applications, designers should select ST's automotive-grade op-amps like TSX942IYDT, which undergo extended reliability testing and include enhanced ESD protection.
TS942BIDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 2 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-SO
TS942BIDT FAQ
1.How can I place an order for TS942BIDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS942BIDT 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 TS942BIDT reliable?
The price and inventory of TS942BIDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS942BIDT is usually 5 days.
3.What payment methods are accepted for TS942BIDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS942BIDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS942BIDT?
TS942BIDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS942BIDT 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 TS942BIDT?
For technical support, including TS942BIDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS942BIDT requirements.
6.How does Aetrix verify that TS942BIDT is sourced from the original manufacturer or authorized distributors?
All TS942BIDT 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 TS942BIDT meets industry standards.
7.What is the process for return or replacement of TS942BIDT?
All TS942BIDT units undergo pre-shipment inspection (PSI). If there is an issue with TS942BIDT, 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 TS942BIDT part is unused and in its original packaging.
Return procedure for TS942BIDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS942BIDT Tags
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LM358DT
STMicroelectronics
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LM358DR
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MCP6006UT-E/OT
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