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STMicroelectronics TS944IPT
- Part No.:
- TS944IPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS944IPT.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,131
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Product details
Overview
TS944IPT from STMicroelectronics is a quad rail-to-rail output micropower operational amplifier optimized for ultra-low-power, single-supply operation (2.5 V to 10 V) across -40°C to +85°C. It delivers 1.2 µA supply current per amplifier, 1 pA typical input bias current, 10 kHz gain bandwidth product, and rail-to-rail output swing - enabling precision signal conditioning in battery-constrained sensor front-ends such as smoke detectors and portable pH meters.
For engineers reviewing the TS944IPT datasheet, TS944IPT pinout, TS944IPT application, or TS944IPT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated SOT23-5-compatible TSSOP14 package details, application-specific role definitions, and two confirmed alternative op-amps with documented functional trade-offs.
Technical Context
The TS944IPT integrates four independent CMOS-input op-amps sharing a common 2.5–10 V single supply, each featuring rail-to-rail output stage capable of sourcing/sinking up to 1.5 mA at 5 V while maintaining 1.2 µA quiescent current. Its 1 pA input bias current and 7 µV/°C offset drift support high-impedance sensor interfacing without significant DC error accumulation over temperature or battery discharge.
Designed for low-voltage analog signal conditioning, it operates with common-mode input range extending from VDD − 0.2 V to VCC − 1.3 V and achieves 85 dB CMRR and 85 dB SVRR at 5 V, ensuring stable amplification in noisy, battery-powered environments where supply regulation is minimal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.2 µA per amplifier - enables >10-year battery life in coin-cell-powered smoke detectors |
| Input Bias Current | 1 pA typical - preserves signal integrity when amplifying high-impedance pH electrode outputs |
| Gain Bandwidth | 10 kHz - sufficient for DC–100 Hz sensor signals (e.g., gas detection transducers) |
| Output Swing | Rail-to-rail - delivers full dynamic range from 2.5 V to 10 V supplies without headroom loss |
| Input Offset Voltage | 2 mV max (TS944B grade) - supports <0.5% accuracy in 3.3 V sensor reference circuits |
| CMRR / SVRR | 85 dB each - rejects power supply ripple and common-mode noise in unshielded portable systems |
| Operating Temp | -40°C to +85°C - qualified for industrial and outdoor environmental monitoring deployments |
Pinout & Package
TSSOP14 package: 4.9 mm × 6.4 mm × 1.05 mm body, 0.65 mm pitch, lead-free ECOPACK® compliant, thermal resistance RthJA = 100 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 12 | Inverting Input (A/B/C/D) | Accepts differential sensor signals; high-impedance CMOS node minimizes loading on pH/gas transducers |
| 2, 4, 6, 13 | Non-inverting Input (A/B/C/D) | Connects to reference voltage or high-Z sensor output; 1 pA bias current prevents drift in microamp-level sources |
| 7 | VDD (Ground) | Power return for all four amplifiers; requires local 100 nF decoupling near pin for stability |
| 14 | VCC (Supply) | Single positive supply input (2.5–10 V); current draw remains constant across voltage range for predictable battery drain |
| 8, 9, 10, 11 | Output (A/B/C/D) | Rail-to-rail swing supports direct interface to 10-bit ADCs without level-shifting circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 1.2 µA per amplifier - reduces total system current to <5 µA in 4-channel sensor arrays |
| Rail-to-Rail Output | Swings within 5 mV of rails at 10 kΩ load - maximizes ADC utilization in 3.3 V data acquisition |
| Ultra-Low Input Bias | 1 pA typical - eliminates guard ring requirements for >100 MΩ source impedances (e.g., glass pH electrodes) |
| Single-Supply Range | 2.5 V to 10 V - supports direct connection to Li-ion, alkaline, or coin-cell batteries without regulators |
| Latch-Up Immunity | Class A rated - withstands transient overvoltage events in fire alarm wiring without failure |
Applications
| Smoke/Gas Detectors | pH Meter Front-End |
|---|---|
|
Use Scenario: Amplifying low-current output from electrochemical gas sensors in battery-powered residential alarms. IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous signal conditioning for CO, smoke, and temperature channels with shared supply. Use Value: 1.2 µA per channel extends AA battery life beyond 5 years while maintaining rail-to-rail output for 12-bit ADC digitization. |
Use Scenario: Buffering high-impedance glass pH electrode output (≥1 GΩ) into an analog front-end. IC Role / Device Role / Timing Role: One amplifier acts as unity-gain buffer; others condition reference and temperature compensation signals. Use Value: 1 pA input bias current prevents >10 mV DC error buildup over 24-hour measurements, critical for ±0.01 pH accuracy. |
| Battery-Powered Instrumentation | Portable Communication Sensors |
|
Use Scenario: Signal conditioning in handheld multimeters and environmental loggers powered by CR2032 cells. IC Role / Device Role / Timing Role: Provides programmable gain stages and offset trimming for multi-range analog inputs. Use Value: Constant 1.2 µA supply current across 2.5–3.6 V battery discharge ensures stable calibration and predictable runtime. |
Use Scenario: Interfacing MEMS accelerometers and ambient light sensors in pagers and early PDAs. IC Role / Device Role / Timing Role: Low-noise preamplifier and active filter stage preceding SAR ADC sampling. Use Value: 10 kHz GBW and rail-to-rail output enable accurate 100 Hz motion detection without external biasing components. |
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 |
|---|---|---|---|
| TLV2464IDR | Higher supply current (550 µA), wider GBW (6.4 MHz), no rail-to-rail input | Suitable for higher-speed sensor interfaces but incompatible with sub-µA battery budgets | Select only if bandwidth >100 kHz is required and battery life is secondary |
| LP324DR | Lower cost, 120 µA supply current, no rail-to-rail output, 100 kHz GBW | Acceptable for non-critical industrial monitors where output headroom loss is tolerable | Choose when cost dominates and 1.2 µA quiescent current is not mandatory |
Compared with TLV2464IDR and LP324DR, TS944IPT uniquely combines true rail-to-rail output, 1 pA input bias, and 1.2 µA supply current - making it irreplaceable in long-life, high-impedance, single-supply sensor nodes where every nanoamp affects field reliability.
Availability
TS944IPT is available at Aetrix Electronics and suitable for smoke/fire detection systems, portable pH instrumentation, battery-powered environmental loggers, and low-power sensor signal conditioning requiring stable component supply across extended production cycles.
Supply support for TS944IPT 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 ultra-low-power, rail-to-rail signal conditioning in battery-operated measurement and safety-critical sensing applications.
FAQ
What is the maximum operating supply voltage for TS944IPT?
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 - especially critical in TSSOP14 packages with RthJA = 100 °C/W.
Does TS944IPT support rail-to-rail input?
No - TS944IPT 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 it cannot accept signals within 1.3 V of the positive rail. This limitation must be accounted for in sensor biasing networks.
Can TS944IPT drive a 10 kΩ load to rail in a 3 V system?
Yes - at VCC = 3 V and RL = 10 kΩ, VOH is typically 2.85 V and VOL is 100 mV, confirming rail-to-rail swing within 150 mV of both rails. This meets the requirement for driving 10-bit SAR ADCs with 3 V references without external level-shifting.
Is TS944IPT pin-compatible with other TSSOP14 quad op-amps?
No - TS944IPT uses a proprietary pinout: pins 1/2/3/4/5/6/12/13 are inputs, 8/9/10/11 are outputs, 7 is VDD, and 14 is VCC. It is not drop-in compatible with industry-standard TSSOP14 op-amps like LM324 or TLV2464, requiring PCB layout revision for substitution.
TS944IPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 10 mV
- Current - Supply:
- 1.2µA (x4 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:
- 14-TSSOP
TS944IPT FAQ
1.How can I place an order for TS944IPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS944IPT 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 TS944IPT reliable?
The price and inventory of TS944IPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS944IPT is usually 5 days.
3.What payment methods are accepted for TS944IPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS944IPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS944IPT?
TS944IPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS944IPT 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 TS944IPT?
For technical support, including TS944IPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS944IPT requirements.
6.How does Aetrix verify that TS944IPT is sourced from the original manufacturer or authorized distributors?
All TS944IPT 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 TS944IPT meets industry standards.
7.What is the process for return or replacement of TS944IPT?
All TS944IPT units undergo pre-shipment inspection (PSI). If there is an issue with TS944IPT, 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 TS944IPT part is unused and in its original packaging.
Return procedure for TS944IPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS944IPT Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
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