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STMicroelectronics TS941BID
- Part No.:
- TS941BID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS941BID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
TS941BID from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier optimized for ultra-low-power, single-supply operation (2.5 V to 10 V), featuring 1.2 µA typical supply current, 1 pA typical input bias current, and 10 kHz gain bandwidth product. It delivers rail-to-rail output swing (e.g., 2.85 V at 3 V with 10 kΩ load) and is qualified for -40°C to +85°C industrial temperature range - ideal for battery-powered smoke detectors and portable pH meters.
For engineers reviewing the TS941BID datasheet, TS941BID pinout, TS941BID application, or TS941BID equivalent, this page provides verified electrical specifications, SOT23-5 package details, real-world use scenarios in low-power sensing, and validated alternative options for offset-critical, micropower signal conditioning designs.
Technical Context
The TS941BID employs CMOS input stage architecture enabling ultra-low input bias current (1 pA typ.) and rail-to-rail output swing via complementary push-pull output stage. Its constant 1.2 µA supply current across 2.5–10 V supply ensures stable operation during battery voltage decay.
It achieves 2 mV max input offset voltage (B-grade), 7 µV/°C drift, and 85 dB common-mode rejection - enabling precision DC-coupled amplification in high-impedance sensor interfaces without external trimming or power cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA typical - enables >10-year battery life in coin-cell–powered detectors |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-Z pH electrode and gas sensor front-ends |
| Input Offset Voltage | 2 mV max (B-grade) - supports <1% error in 100 mV–1 V sensor output amplification |
| Gain Bandwidth | 10 kHz - sufficient for DC–1 kHz sensor signal conditioning (e.g., thermistor, CO sensor) |
| Output Swing | Rail-to-rail - delivers full dynamic range at 3 V supply (2.85 V high / 0.1 V low @ 10 kΩ) |
| CMRR | 85 dB - rejects noise from shared ground in multi-sensor battery systems |
| ESD Protection | 2 kV HBM - withstands handling in unshielded portable device assembly |
Pinout & Package
SOT23-5 micropackage (ECOPACK® compliant), 2.9 mm × 1.6 mm footprint, 1.3 mm height - optimized for space-constrained PCBs in handheld and wearable sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Push-pull rail-to-rail output capable of sourcing/sinking ±650 µA @ 3 V |
| 2 (−IN) | Inverting Input | High-impedance CMOS node; 1 pA bias current minimizes leakage error |
| 3 (V−) | Negative Supply / Ground | Connect to system ground in single-supply configuration (VDD = 0 V) |
| 4 (V+) | Positive Supply | Accepts 2.5–10 V; supply current remains stable across full range |
| 5 (+IN) | Non-inverting Input | High-impedance CMOS node; common-mode range extends to V− −0.2 V and V+ −1.3 V |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers full 0–VCC dynamic range at 3 V supply - eliminates need for level-shifting in low-voltage ADC interfaces |
| Micropower operation | 1.2 µA supply current enables >5-year operation on CR2032 (220 mAh) in sleep-mode smoke alarms |
| Ultra-low input bias | 1 pA typical allows direct connection to >1 GΩ pH electrodes without significant offset drift |
| Single-supply compatible | Operates from 2.5 V - supports Li-ion, alkaline, and coin-cell sources without charge pumps |
| Latch-up immunity | Class A rating ensures robustness against transient overvoltage events in field-deployed detectors |
Applications
| Smoke/Gas Detector Front-End | pH Electrode Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying weak current output (nA–µA) from electrochemical CO or smoke ionization chambers into clean voltage for ADC sampling. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with ultra-low input bias to prevent signal loss across high-value feedback resistors. Use Value: 1 pA input bias enables ≥10 MΩ feedback resistor selection, achieving 10 mV/nA gain while maintaining stability and low noise. |
Use Scenario: Buffering and amplifying high-impedance mV-level output from glass pH electrodes in portable water quality testers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating electrode from ADC input; rail-to-rail output maximizes usable range at 3.3 V supply. Use Value: 2 mV max offset ensures <±0.03 pH error at 59 mV/pH slope; 1.2 µA current extends battery life beyond 2 years. |
| Battery-Powered Alarm System | Portable Gas Sensor Interface |
|
Use Scenario: Monitoring battery voltage and sensor thresholds in wireless alarm panels powered by AA batteries. IC Role / Device Role / Timing Role: Precision comparator reference buffer and low-power supply monitor amplifier. Use Value: Stable 1.2 µA current across 2.5–10 V enables accurate end-of-life detection without supply-dependent calibration drift. |
Use Scenario: Signal conditioning for semiconductor metal-oxide (MOS) gas sensors requiring low-noise, low-drift amplification of resistance changes. IC Role / Device Role / Timing Role: Differential amplifier for bridge-based sensor configurations with rail-to-rail output swing. Use Value: 85 dB CMRR rejects common-mode noise from heater drive circuits; 10 kHz GBW supports fast response to gas concentration changes. |
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 |
|---|---|---|---|
| TS941AID | 5 mV max input offset (A-grade vs. B-grade's 2 mV); otherwise identical specs and pinout | Higher offset tolerance acceptable in non-precision threshold detection (e.g., basic alarm triggers) | Select when 5 mV offset meets system accuracy requirements and cost optimization is prioritized |
| MCP6001T-I/OT | 1 µA supply current, 2.5 V–5.5 V range only, 100 nA input bias (vs. 1 pA), 1 MHz GBW | Not suitable for ultra-high-Z pH electrodes; better for higher-speed, lower-accuracy portable audio or logic interfacing | Choose only if wider bandwidth is required and input impedance >100 MΩ is not critical |
Compared with TS941AID, the TS941BID offers tighter offset control for precision analog front-ends; versus MCP6001T-I/OT, it delivers 1000× lower input bias for electrochemical sensors but trades off bandwidth - making it optimal for DC–1 kHz, battery-constrained measurement systems.
Availability
TS941BID is available at Aetrix Electronics and suitable for battery-powered smoke detectors, portable pH meters, and gas sensor interfaces requiring stable component supply with long-term lifecycle support.
Supply support for TS941BID 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, single-supply sensor signal conditioning in portable and battery-operated instrumentation.
FAQ
What is the maximum operating supply voltage for TS941BID?
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 thermal limits due to increased junction temperature, especially in SOT23-5 package where RthJA is 250 °C/W - sustained 12 V operation may exceed 150 °C junction limit under load.
Does TS941BID support true rail-to-rail input?
No - TS941BID 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 to the positive rail. For example, at 3 V supply, valid input range is 0.1 V to 1.7 V - requiring external biasing for signals near VCC.
Can TS941BID drive a 10 kΩ load at 3 V supply?
Yes - the datasheet confirms 2.85 V high-level output and 0.1 V low-level output at 3 V supply with 10 kΩ load to VCC/2. Output source/sink capability is ≥650 µA, well above the 300 µA required for 3 V across 10 kΩ, ensuring full rail-to-rail swing remains intact under this load condition.
Is TS941BID suitable for pH electrode buffering?
Yes - its 1 pA typical input bias current and 2 mV max offset make it exceptionally well-suited for high-impedance pH electrodes (typically >1 GΩ). Unlike op-amps with nA-level bias, TS941BID avoids introducing significant offset or drift due to electrode leakage, preserving measurement accuracy in portable and handheld pH meters.
TS941BID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TS941BID FAQ
1.How can I place an order for TS941BID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS941BID 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 TS941BID reliable?
The price and inventory of TS941BID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS941BID is usually 5 days.
3.What payment methods are accepted for TS941BID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS941BID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS941BID?
TS941BID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS941BID 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 TS941BID?
For technical support, including TS941BID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS941BID requirements.
6.How does Aetrix verify that TS941BID is sourced from the original manufacturer or authorized distributors?
All TS941BID 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 TS941BID meets industry standards.
7.What is the process for return or replacement of TS941BID?
All TS941BID units undergo pre-shipment inspection (PSI). If there is an issue with TS941BID, 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 TS941BID part is unused and in its original packaging.
Return procedure for TS941BID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS941BID 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
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