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STMicroelectronics TS944BIN
- Part No.:
- TS944BIN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TS944BIN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,267
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Product details
Overview
TS944BIN from STMicroelectronics is a quad 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, 1 pA 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 TS944BIN datasheet, TS944BIN pinout, TS944BIN application, or TS944BIN equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SOT23-5-compatible SO-14 pin mapping, application-specific use value, and two confirmed functional alternatives with documented differences in offset voltage and temperature drift.
Technical Context
The TS944BIN implements CMOS input stage architecture with rail-to-rail output stage, supporting operation from 2.5 V to 10 V single supply across –40°C to +85°C. Its 1 pA typical input bias current and constant 1.2 µA supply current over supply voltage enable stable sensor interface performance near end-of-battery life.
It features 85 dB common-mode rejection ratio (CMR) and 85 dB supply voltage rejection ratio (SVR) at 5 V, with 100 dB large-signal voltage gain into 1 MΩ load - confirming high-precision DC-coupled amplification capability without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA per amplifier - enables >1-year battery life in 3 V coin-cell–powered gas detectors |
| Input Bias Current | 1 pA typical - preserves signal integrity when amplifying high-impedance pH electrode outputs |
| Gain Bandwidth | 10 kHz - supports DC to low-frequency AC sensor signals (e.g., thermistor, CO sensor outputs) |
| Output Swing | Rail-to-rail - delivers full 0–3 V dynamic range from 3 V supply, maximizing ADC utilization |
| Input Offset Voltage | 10 mV max (TS944B grade) - sets baseline accuracy for uncalibrated low-cost industrial sensors |
| Common-Mode Range | VDD −0.2 V to VCC −1.3 V - allows direct sensing of signals referenced to ground in single-supply systems |
| ESD Protection | 2 kV HBM - meets IEC 61000-4-2 Level 2 for handheld device front-end robustness |
Pinout & Package
TS944BIN is housed in a 14-lead SOIC (SO-14) package with standard 1.27 mm pitch, 8.55–8.75 mm body length, and 3.80–4.00 mm width per ST Doc ID 6972 Rev 6, Table 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts differential signal input; high-impedance node requiring guarded trace routing |
| 2 | Non-inverting Input (Amplifier A) | Reference point for A-channel gain configuration; sensitive to PCB leakage currents |
| 3 | Output (Amplifier A) | Delivers rail-to-rail voltage; capable of sourcing/sinking up to 1.5 mA at 5 V |
| 4 | VDD (Ground) | Power return path; must be low-inductance connection to minimize noise coupling between channels |
| 5 | Non-inverting Input (Amplifier B) | Independent input for second channel; shares same CMRR and bias current specs as Channel A |
| 6 | Inverting Input (Amplifier B) | Differential pair input for B-channel; pin-swapped relative to Channel A for layout symmetry |
| 7 | Output (Amplifier B) | Second independent output; identical drive strength and swing to Channel A |
| 8 | VCC (Supply) | Single positive supply input (2.5–10 V); supplies all four amplifiers simultaneously |
| 9 | Output (Amplifier C) | Third output channel; electrically isolated but thermally coupled to other channels |
| 10 | Inverting Input (Amplifier C) | Third channel inverting input; matches electrical characteristics of Pins 1 and 6 |
| 11 | Non-inverting Input (Amplifier C) | Third channel non-inverting input; identical input impedance and bias current to other inputs |
| 12 | Non-inverting Input (Amplifier D) | Fourth channel reference input; supports independent gain setting per channel |
| 13 | Inverting Input (Amplifier D) | Fourth channel differential input; fully decoupled from other channels in layout |
| 14 | Output (Amplifier D) | Final rail-to-rail output; enables 4-channel sensor signal conditioning on single IC |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Enables full-scale utilization of 3 V ADCs without level-shifting circuitry |
| 1.2 µA supply current per amplifier | Reduces total quiescent power to <5 µA for 4-channel system, extending CR2032 battery life beyond 2 years |
| 1 pA input bias current | Eliminates significant error in high-Z pH probe interfaces where 100 MΩ source impedance would cause >10 mV offset |
| 2.5 V to 10 V single-supply operation | Supports direct integration into 3 V microcontroller sensor nodes and 9 V industrial transmitters |
| Latch-up immunity (Class A) | Guarantees no destructive latch-up during ESD events or supply sequencing faults |
Applications
| Smoke Detector Signal Conditioning | Portable pH Meter Front-End |
|---|---|
Use Scenario: Amplifying weak ionization current (pA–nA range) from smoke chamber electrodes into measurable voltage for MCU ADC sampling. IC Role / Device Role / Timing Role: Quad op-amp configured as transimpedance amplifier (Channel A), buffer (B), comparator reference generator (C), and filter stage (D). Use Value: 1 pA input bias current prevents signal loss in ultra-high-impedance smoke chamber; 1.2 µA per channel minimizes battery drain in mains-independent units. | Use Scenario: Converting high-impedance glass electrode output (≥1 GΩ) to low-impedance buffered voltage for precision 16-bit ADC measurement. IC Role / Device Role / Timing Role: First-stage TIA with guard ring, second-stage gain/level-shift, third-stage reference buffer, fourth-stage low-pass filter. Use Value: Rail-to-rail output ensures full 0–3 V span fits within 3 V MCU ADC range; 10 mV max offset limits raw pH error to ±0.1 pH unit before calibration. |
| Battery-Powered Gas Sensor Interface | Low-Power Instrumentation Data Logger |
Use Scenario: Conditioning analog output from electrochemical CO sensor (10–100 nA full scale) in wearable air quality monitor. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable gain, followed by rail-to-rail output buffer driving SAR ADC. Use Value: 1.2 µA per amplifier allows continuous 1 Hz sampling for >18 months on 200 mAh Li-ion cell; CMOS inputs prevent sensor loading. | Use Scenario: Simultaneous amplification of thermistor, humidity, and pressure sensor outputs in field-deployed environmental logger. IC Role / Device Role / Timing Role: Four independent precision amplifiers for multi-sensor analog front-end, each with dedicated gain and filtering. Use Value: Single SO-14 package replaces four discrete op-amps, reducing PCB area by 60% and inter-channel crosstalk via shared VCC/VDD decoupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS944IDT | Same SO-14 package, identical electrical specs, tape-and-reel packaging only | No functional difference; selected for automated SMT assembly vs. tube delivery | Choose for high-volume production requiring reel-fed pick-and-place |
| TS944AID | Lower 5 mV max input offset voltage (vs. 10 mV for TS944BIN), same 1 pA bias current and 1.2 µA supply current | Better DC accuracy for uncalibrated sensor systems; same power and thermal behavior | Choose when initial offset error must be <±2.5 mV without trimming |
Compared with TS944BIN, TS944IDT offers identical performance in tape-and-reel format for manufacturing efficiency, while TS944AID improves DC accuracy with 50% lower offset voltage-critical for high-precision analog front-ends where calibration is impractical.
Availability
TS944BIN is available at Aetrix Electronics and suitable for smoke detector signal conditioning, portable pH meter front-ends, and battery-powered gas sensor interfaces requiring stable component supply across extended product lifecycles.
Supply support for TS944BIN 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-constrained applications such as portable medical devices and environmental monitors.
FAQ
What is the maximum operating supply voltage for TS944BIN?
The absolute maximum supply voltage for TS944BIN is 12 V, but its specified operating range is 2.5 V to 10 V per STMicroelectronics Doc ID 6972 Rev 6, Table 3. Operation above 10 V voids guaranteed performance and may degrade long-term reliability due to increased junction temperature and stress on internal CMOS structures.
Does TS944BIN support true rail-to-rail input?
No, TS944BIN features rail-to-rail *output* only. Its common-mode input voltage range is specified as VDD −0.2 V to VCC −1.3 V (Table 3), meaning it cannot accept inputs within 1.3 V of the positive rail. This limitation requires careful biasing when interfacing with sensors referenced to VCC.
Can TS944BIN drive a 10 kΩ load at 3 V supply?
Yes - TS944BIN delivers 2.85 V typical high-level output and 100 mV typical low-level output into 10 kΩ at 3 V supply (Table 5), achieving >95% of rail-to-rail swing. Output current capability exceeds ±1.3 mA under these conditions, ensuring stable operation without external buffers.
Is TS944BIN qualified for automotive applications?
No - TS944BIN is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. ST does not specify automotive-grade variants for the TS94x series; for automotive use, consider ST's TSZ12x or TSV91x families with extended temperature and qualification support.
TS944BIN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- 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:
- Through Hole
- Supplier Device Package:
- 14-DIP
TS944BIN FAQ
1.How can I place an order for TS944BIN through Aetrix?
Please submit a Request for Quotation (RFQ) for TS944BIN 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 TS944BIN reliable?
The price and inventory of TS944BIN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS944BIN is usually 5 days.
3.What payment methods are accepted for TS944BIN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS944BIN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS944BIN?
TS944BIN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS944BIN 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 TS944BIN?
For technical support, including TS944BIN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS944BIN requirements.
6.How does Aetrix verify that TS944BIN is sourced from the original manufacturer or authorized distributors?
All TS944BIN 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 TS944BIN meets industry standards.
7.What is the process for return or replacement of TS944BIN?
All TS944BIN units undergo pre-shipment inspection (PSI). If there is an issue with TS944BIN, 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 TS944BIN part is unused and in its original packaging.
Return procedure for TS944BIN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS944BIN Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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