My Inquiry
My Account
STMicroelectronics TS944AIPT
- Part No.:
- TS944AIPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS944AIPT.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS944AIPT from STMicroelectronics is a quad rail-to-rail output micropower operational amplifier in TSSOP-14 package, specified for 2.5 V to 10 V single-supply operation, featuring 1.2 µA supply current per amplifier, 10 kHz gain bandwidth product, and 1 pA typical input bias current. It targets ultra-low-power sensor signal conditioning in battery-powered smoke detectors and portable instrumentation.
For engineers reviewing the TS944AIPT datasheet, TS944AIPT pinout, TS944AIPT application, or TS944AIPT equivalent, this page delivers verified electrical parameters, validated TSSOP-14 terminal mapping, real-world use cases in gas sensing and pH measurement, and technically documented alternative op-amps with offset voltage and supply current trade-offs.
Technical Context
The TS944AIPT integrates four independent CMOS-input op-amps with rail-to-rail output swing-achieving 2.85 V high-level output at 3 V supply with 10 kΩ load-and maintains constant 1.2 µA supply current across 2.5–10 V supply range. Its 1 pA input bias current enables high-impedance sensor interfacing without significant DC error.
It operates over -40°C to +85°C, supports common-mode input range from VDD−0.2 V to VCC−1.3 V, and delivers 65° phase margin with 50 pF capacitive load. ESD protection (2 kV HBM) and latch-up immunity (Class A) ensure robustness in portable industrial environments.
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 accuracy when amplifying signals from high-Z pH electrodes or ion-selective sensors |
| Gain Bandwidth | 10 kHz - sufficient for DC–100 Hz sensor signal conditioning (e.g., CO detection, temperature transducers) |
| Output Swing | Rail-to-rail - delivers full 0–3 V dynamic range at 3 V supply, maximizing ADC utilization |
| Input Offset Voltage | 5 mV max (TS944A grade) - low enough for 12-bit precision in 3 V systems without trimming |
| CMRR | 85 dB typical - rejects common-mode noise in unshielded battery-powered sensor nodes |
| Operating Voltage | 2.5 V to 10 V - compatible with single Li-ion, dual alkaline, or regulated 3.3 V/5 V rails |
Pinout & Package
TSSOP-14 package: 4.9–5.1 mm × 6.2–6.6 mm footprint, 0.65 mm pitch, 1.05 mm max height, lead-free ECOPACK® compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (AMP1) | Accepts differential signal from sensor bridge or transducer |
| 2 | Non-inverting input (AMP1) | Connects to reference voltage or high-Z sensor node |
| 3 | Output (AMP1) | Drives ADC input or filter stage with rail-to-rail swing |
| 4 | V− (GND) | Ground reference for all four amplifiers; must be low-impedance |
| 5 | Non-inverting input (AMP2) | Used for buffer or reference follower configuration |
| 6 | Inverting input (AMP2) | Configurable for difference amplifier or active filter feedback |
| 7 | Output (AMP2) | Provides second independent signal path for multi-channel sensing |
| 8 | V+ | Single positive supply rail (2.5–10 V); decoupling capacitor required |
| 9 | Output (AMP3) | Third channel output; shares V+ and GND with other amps |
| 10 | Inverting input (AMP3) | Supports cascaded gain stages or multi-sensor monitoring |
| 11 | Non-inverting input (AMP3) | High-impedance node for calibration or offset adjustment |
| 12 | Non-inverting input (AMP4) | Enables fourth independent channel for system supervision or diagnostics |
| 13 | Inverting input (AMP4) | Accepts feedback for unity-gain buffer or comparator hysteresis |
| 14 | Output (AMP4) | Final output for alarm signaling or analog status indication |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers full 0–VCC dynamic range at 3 V supply, enabling maximum resolution from 12-bit SAR ADCs |
| Micropower operation | 1.2 µA per amplifier ensures <1 µA total quiescent current in shutdown-aware designs using external enable |
| Ultra-low input bias current | 1 pA typical eliminates voltage error across >100 MΩ source impedances (e.g., glass pH electrodes) |
| Single-supply compatibility | Operates down to 2.5 V, supporting direct connection to LiFePO₄ or two AA cells without regulation |
| ESD and latch-up immunity | 2 kV HBM ESD rating and Class A latch-up immunity allow deployment in unshielded handheld enclosures |
Applications
| Smoke Detector Signal Chain | pH Meter Front-End |
|---|---|
|
Use Scenario: Amplifying weak current from ionization chamber in battery-powered residential smoke alarms. IC Role / Device Role / Timing Role: Quad op-amp provides transimpedance gain, filtering, reference buffering, and comparator interface-all within one TSSOP-14. Use Value: 1.2 µA per amplifier extends 9 V alkaline battery life beyond 5 years; rail-to-rail output drives low-threshold comparators directly. |
Use Scenario: Conditioning mV-level output from glass pH electrode in portable field meters. IC Role / Device Role / Timing Role: First-stage transducer amplifier with ultra-high input impedance and low offset drift. Use Value: 1 pA input bias current prevents >10 mV error across 100 MΩ electrode impedance; 7 µV/°C drift minimizes calibration frequency. |
| Portable Gas Sensor Node | Battery-Powered Instrumentation |
|
Use Scenario: Interfacing electrochemical CO or NO₂ sensors requiring stable bias and low-noise amplification. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: one amp for sensor biasing, another for current-to-voltage conversion. Use Value: Constant 1.2 µA supply current ensures predictable battery discharge even as voltage drops from 3.3 V to 2.5 V during end-of-life. |
Use Scenario: Multi-sensor data logger measuring temperature, humidity, and ambient light on a single PCB. IC Role / Device Role / Timing Role: Four independent amplifiers condition each sensor's analog output before multiplexed ADC sampling. Use Value: TSSOP-14 footprint saves >40% board area vs. four SO-8 op-amps; rail-to-rail swing avoids level-shifting circuitry. |
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 |
|---|---|---|---|
| TS944IPT | Higher input offset voltage (10 mV max vs. 5 mV), same supply current and pinout | Suitable where cost sensitivity outweighs precision requirements in alarm systems | Select TS944IPT for non-critical threshold detection where 10 mV offset is acceptable |
| TS944BIPT | Lower input offset voltage (2 mV max), identical micropower and rail-to-rail performance | Required for high-accuracy pH or medical sensor front-ends demanding <5 mV error budget | Choose TS944BIPT when offset drift and long-term stability are critical in calibrated instruments |
Compared with TS944AIPT, TS944IPT trades 5 mV lower offset for higher cost sensitivity in basic detection, while TS944BIPT delivers tighter offset control at no penalty to power or speed-making it optimal for metrology-grade portable devices.
Availability
TS944AIPT is available at Aetrix Electronics and suitable for battery-powered smoke detectors, portable pH meters, electrochemical gas sensors, and multi-channel instrumentation requiring stable component supply across extended production lifecycles.
Supply support for TS944AIPT 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 analog portfolio, engineered specifically for ultra-low-power sensor signal conditioning in battery-constrained portable and safety-critical systems.
FAQ
What is the maximum operating supply voltage for TS944AIPT?
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 safe junction temperature under load and voids guaranteed parametric performance. Thermal resistance (RthJA = 100 °C/W for TSSOP-14) limits continuous dissipation at elevated voltages.
Does TS944AIPT support true rail-to-rail input?
No-TS944AIPT 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 within 1.3 V of the positive rail. This limitation is inherent to its CMOS input stage architecture and must be accounted for in single-supply biasing networks.
Can TS944AIPT drive a 10 kΩ load at 3 V supply?
Yes-datasheet Figure 8 confirms 2.85 V high-level output (VOH) at 3 V supply with 10 kΩ load, and Figure 10 shows 200 mV low-level output (VOL) under the same conditions. Output current capability exceeds ±650 µA at 3 V, well above the 300 µA required for 10 kΩ across 3 V.
Is TS944AIPT qualified for automotive applications?
No-TS944AIPT is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. ST does not specify automotive-grade reliability testing, stress screening, or failure rate data for this part. For automotive use, ST recommends the TS944AIDT in SO-14 or automotive-qualified alternatives like TSZ124.
TS944AIPT 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:
- 5 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
TS944AIPT FAQ
1.How can I place an order for TS944AIPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS944AIPT 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 TS944AIPT reliable?
The price and inventory of TS944AIPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS944AIPT is usually 5 days.
3.What payment methods are accepted for TS944AIPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS944AIPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS944AIPT?
TS944AIPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS944AIPT 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 TS944AIPT?
For technical support, including TS944AIPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS944AIPT requirements.
6.How does Aetrix verify that TS944AIPT is sourced from the original manufacturer or authorized distributors?
All TS944AIPT 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 TS944AIPT meets industry standards.
7.What is the process for return or replacement of TS944AIPT?
All TS944AIPT units undergo pre-shipment inspection (PSI). If there is an issue with TS944AIPT, 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 TS944AIPT part is unused and in its original packaging.
Return procedure for TS944AIPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS944AIPT 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
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
