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STMicroelectronics TS941ID
- Part No.:
- TS941ID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS941ID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,285
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Product details
Overview
TS941ID from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier designed for ultra-low-power signal conditioning in battery-constrained systems. It operates from 2.5 V to 10 V, draws only 1.2 µA supply current (typ.), delivers 10 kHz gain bandwidth, and features 1 pA typical input bias current - enabling precision sensing in smoke detectors, pH meters, and portable pagers.
For engineers reviewing the TS941ID datasheet, TS941ID pinout, TS941ID application, or TS941ID equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SO-8 package pin functions, application-specific role definitions, and two confirmed alternative op-amps with documented functional trade-offs.
Technical Context
The TS941ID uses CMOS input stage architecture to achieve 1 pA typical input bias current and rail-to-rail output swing - delivering 2.85 V high-level output at 3 V supply with 10 kΩ load. Its 10 kHz gain-bandwidth product and 3 V/ms slew rate support low-frequency sensor amplification without phase distortion.
It maintains stable 1.2 µA supply current across 2.5–10 V supply range and exhibits 85 dB common-mode rejection (CMR) and 85 dB supply voltage rejection (SVR) at 5 V, ensuring robust performance in noisy single-supply environments like battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA typ. - enables >1-year operation on CR2032 coin cell in always-on smoke detector mode |
| Input Bias Current | 1 pA typ. - minimizes voltage error in high-impedance pH electrode interfaces (>100 MΩ source) |
| Gain Bandwidth | 10 kHz - sufficient for DC–100 Hz sensor signals (e.g., thermistor, gas sensor outputs) |
| Output Swing | Rail-to-rail - delivers full 0–3 V dynamic range at 3 V supply, maximizing ADC utilization |
| Input Voltage Range | VDD − 0.2 V to VCC − 1.3 V - supports single-supply operation down to 2.5 V with usable common-mode headroom |
| ESD Protection | 2 kV HBM - meets IEC 61000-4-2 Level 2 for handheld device front-end protection |
| Operating Temp | −40°C to +85°C - qualified for industrial and consumer environmental deployment |
Pinout & Package
TS941ID is housed in an SO-8 surface-mount package (JEDEC MS-012AC), measuring 4.9 mm × 6.0 mm × 1.75 mm, with 1.27 mm lead pitch and ECOPACK® RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Inverting Input (−) | Differential input node | Accepts feedback or sensor signal; 1 pA bias current avoids loading high-Z sources |
| Non-inverting Input (+) | Differential input node | Connects to reference or sensor; CMOS input enables direct connection to pH probe electrodes |
| Output | Amplified signal source/sink | Drives 10 kΩ load rail-to-rail; 680 µA sink/source capability supports buffered ADC input stages |
| VCC | Positive supply rail | Accepts 2.5–10 V; supply current remains constant across this range for predictable battery life |
| VDD | Negative supply rail / ground | Typically 0 V in single-supply configs; allows true 0 V output swing |
| NC | No connect | Pin 6 is internally unconnected - must be left floating or tied to VDD per layout guidelines |
| NC | No connect | Pin 7 is internally unconnected - no routing or soldering required |
| NC | No connect | Pin 8 is internally unconnected - unused pad; no thermal or electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers full 0–VCC swing at 3 V supply with 10 kΩ load - maximizes dynamic range into 10-bit ADCs |
| Micropower operation | 1.2 µA supply current enables >5-year shelf life in alarm systems with lithium primary batteries |
| Ultra-low input bias | 1 pA typical bias current prevents drift in high-impedance pH meter front-ends (≥1 GΩ electrode impedance) |
| Single-supply compatible | Operates from 2.5 V - supports direct integration with 3 V microcontrollers and low-voltage sensors |
| Latch-up immunity | Class A rating ensures immunity to transient-induced latch-up during battery insertion or ESD events |
Applications
| Smoke/Gas Detector Front-End | pH Meter Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying weak current output (nA–µA) from electrochemical gas sensors in battery-powered residential alarms. IC Role / Device Role / Timing Role: Transimpedance amplifier with rail-to-rail output driving low-power ADC; no external biasing needed due to CMOS inputs. Use Value: 1 pA input bias eliminates offset drift over 10-year battery life; 1.2 µA quiescent current extends CR123A battery life to >7 years in standby. |
Use Scenario: Buffering high-impedance glass electrode (≥1 GΩ) in handheld pH meters powered by AAA alkaline cells. IC Role / Device Role / Timing Role: Unity-gain buffer isolating electrode from ADC input; rail-to-rail output preserves full 0–14 pH measurement range. Use Value: 1 pA input bias prevents electrode polarization errors; 2.5 V minimum supply enables operation until battery drops to 2.7 V. |
| Battery-Powered Alarm System | Portable Pager Audio Stage |
|
Use Scenario: Low-power comparator input stage and sensor interface in wireless security alarm nodes using Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Precision reference buffer and sensor signal conditioner; operates continuously at <2 µA total system current. Use Value: Stable 1.2 µA supply current across temperature (−40°C to +85°C) ensures consistent battery modeling and end-of-life prediction. |
Use Scenario: Audio preamplifier for piezoelectric buzzer driver in legacy pagers requiring minimal PCB area and power. IC Role / Device Role / Timing Role: Single-supply AC-coupled gain stage; rail-to-rail output drives Class-AB audio buffer without negative rail. Use Value: 10 kHz GBW supports 1–5 kHz audible tones; SO-8 package allows compact 2-layer PCB layout with no thermal derating needed. |
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 | Lower 5 mV max input offset voltage vs. 10 mV for TS941ID - improves DC accuracy in pH calibration | Same SO-8 package and pinout; identical micropower profile - drop-in replacement where offset matters | Select when sensor offset error budget is <10 mV; same cost and availability as TS941ID |
| MCP6001T-I/OT | Higher 100 nA input bias current and 100 kHz GBW - trades ultra-low bias for wider bandwidth | Requires redesign for high-Z pH electrodes; better suited for audio or faster sensor signals | Choose only if bandwidth >10 kHz is required and input impedance <10 MΩ - not suitable for pH or gas sensors |
Compared with TS941AID, TS941ID offers higher offset tolerance but identical power and bias performance; versus MCP6001T-I/OT, it delivers 1000× lower input bias for electrode interfacing but sacrifices bandwidth - making TS941ID optimal for precision, ultra-low-power DC sensing.
Availability
TS941ID is available at Aetrix Electronics and suitable for battery-powered alarm systems, portable pH meters, and smoke/gas detector designs requiring stable component supply across extended production lifecycles.
Supply support for TS941ID 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The TS94x series belongs to ST's precision analog portfolio, engineered specifically for micropower, rail-to-rail signal conditioning in battery-operated instrumentation and safety-critical detection systems.
FAQ
What is the maximum supply voltage for TS941ID?
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 junction temperature limits under load and voids parametric guarantees - sustained use at 12 V is not advised for reliability-critical designs.
Can TS941ID drive a 10 kΩ load rail-to-rail at 3 V?
Yes - the datasheet specifies 2.85 V high-level output and 100 mV low-level output at 3 V supply with 10 kΩ load, confirming true rail-to-rail swing within 150 mV of each rail. This meets requirements for driving 10-bit SAR ADCs with 3 V reference.
Is TS941ID pin-compatible with TS941AID or TS941BID?
Yes - all three share identical SO-8 pinout, package dimensions, and terminal functions. Only electrical parameters differ: TS941AID has tighter 5 mV max offset, TS941BID has 2 mV max offset, while TS941ID is the standard grade with 10 mV max offset - mechanical interchangeability is fully guaranteed.
Does TS941ID require external compensation capacitors?
No - the TS941ID is unity-gain stable with 65° phase margin at 10 kHz (CL = 50 pF), and no external compensation is needed for gains ≥1. Stability is maintained across 1 MΩ to 10 kΩ loads and supply voltages from 2.5 V to 10 V per Figure 12.
TS941ID 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:
- 10 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
TS941ID FAQ
1.How can I place an order for TS941ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS941ID 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 TS941ID reliable?
The price and inventory of TS941ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS941ID is usually 5 days.
3.What payment methods are accepted for TS941ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS941ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS941ID?
TS941ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS941ID 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 TS941ID?
For technical support, including TS941ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS941ID requirements.
6.How does Aetrix verify that TS941ID is sourced from the original manufacturer or authorized distributors?
All TS941ID 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 TS941ID meets industry standards.
7.What is the process for return or replacement of TS941ID?
All TS941ID units undergo pre-shipment inspection (PSI). If there is an issue with TS941ID, 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 TS941ID part is unused and in its original packaging.
Return procedure for TS941ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS941ID 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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