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STMicroelectronics TS931AILT
- Part No.:
- TS931AILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS931AILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,818
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Product details
Overview
TS931AILT from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier in SOT23-5 package, designed for ultra-low-power sensor signal conditioning and battery-powered instrumentation. It operates from 2.7 V to 10 V supply, consumes only 20 μA typical supply current, delivers 2.95 V high-level output at 3 V supply (RL = 100 kΩ), and features 1 pA input bias current and 2 mV max input offset voltage (TS931B grade).
For engineers reviewing the TS931AILT datasheet, TS931AILT pinout, TS931AILT application, or TS931AILT equivalent, this device is selected for precision analog front-ends where supply current < 35 μA, input bias current ≤ 1 pA, rail-to-rail output swing, and operation down to 2.7 V are mandatory - especially in portable pH meters, smoke detector analog stages, and automotive-grade sensor interfaces.
Technical Context
The TS931AILT implements a CMOS-input op-amp architecture with rail-to-rail output stage using complementary push-pull transistors, enabling full-swing output (e.g., 2.95 V at VCC = 3 V) into 100 kΩ loads. Its input stage achieves 1 pA typical bias current and 2 mV max offset voltage over temperature, supported by 85 dB CMRR and 85 dB PSRR at DC.
It is internally compensated for unity-gain stability with 100 kHz gain-bandwidth product and 50 V/ms slew rate under 100 kΩ/50 pF load conditions. Phase margin is specified at 65°, ensuring robust stability across supply voltages (2.7–10 V) and temperatures (−40 °C to +105 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - enables direct use with single Li-ion cell (3.0–3.7 V), 3.3 V logic rails, or dual AA/AAA battery stacks (3 V nominal). |
| Supply Current (per amp) | 20 μA typ. - allows >1-year operation on a 200 mAh coin cell in always-on sensor nodes. |
| Input Bias Current | 1 pA typ. - preserves signal integrity in high-impedance pH electrode and photodiode interfaces without loading error. |
| Input Offset Voltage | 2 mV max. (TS931B grade) - supports 12-bit accuracy in 3 V full-scale systems without trimming. |
| Output Swing (RL = 100 kΩ) | 2.95 V at VOH / 10 mV at VOL (VCC = 3 V) - delivers true rail-to-rail dynamic range for ADC input buffering. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal amplification (e.g., thermistor, strain gauge, ECG front-end). |
| Common-Mode Rejection | 85 dB min. - rejects noise from shared ground paths in battery-powered portable instruments. |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 5-pin surface-mount outline with gull-wing leads, ECOPACK® compliant, rated for −40 °C to +105 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (In−) | Inverting Input | Differential input node; accepts signals up to VCC− −0.2 V and VCC+ −1.5 V common-mode range. |
| 2 (In+) | Non-inverting Input | High-impedance CMOS input (1 pA bias); used for reference or sensor signal routing in instrumentation. |
| 3 (V−) | Negative Supply | Ground or negative rail connection; supports single-supply operation with V− = 0 V. |
| 4 (Out) | Amplifier Output | Rail-to-rail CMOS output capable of sourcing/sinking 1.5 mA; drives 100 kΩ loads to within 10 mV of rails. |
| 5 (V+) | Positive Supply | Power input (2.7–10 V); decoupling capacitor required near pin for stability at 100 kHz GBW. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers 2.95 V high-level and 10 mV low-level output at 3 V supply - maximizes dynamic range for 12-bit ADCs. |
| Micropower operation | 20 μA supply current enables multi-year battery life in wireless smoke detectors and portable gas sensors. |
| Ultra-low input bias current | 1 pA typical eliminates voltage error in >1 GΩ source impedances (e.g., glass pH electrodes, piezoelectric sensors). |
| Automotive-grade qualification | AEC-Q100 qualified (TS931B variant) - validated for under-hood temperature cycling and ESD robustness (2 kV HBM). |
| Single-supply compatibility | Operates from 2.7 V with input common-mode range extending to V− −0.2 V - simplifies design in 3 V systems without level-shifting. |
Applications
| pH Meter Front-End | Smoke Detector Analog Stage |
|---|---|
|
Use Scenario: Amplifying microamp-level current from glass pH electrode in handheld or benchtop meter. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance amplifier with ultra-low input bias current to avoid electrode polarization error. Use Value: 1 pA input bias ensures < 1 mV offset error with 1 GΩ electrode impedance, enabling ±0.02 pH resolution. |
Use Scenario: Conditioning ionization chamber current (sub-nA) and photoelectric sensor output in residential smoke alarms. IC Role / Device Role / Timing Role: Low-drift, micropower signal conditioner for battery-operated safety-critical analog sensing. Use Value: 20 μA quiescent current extends 9 V alkaline battery life beyond 10 years in standby mode. |
| Digital Scale Load Cell Interface | Automotive Cabin Temperature Sensor |
|
Use Scenario: Amplifying mV-level Wheatstone bridge output from strain-gauge load cells in precision weighing equipment. IC Role / Device Role / Timing Role: Rail-to-rail output buffer driving 16-bit sigma-delta ADC input with minimal headroom loss. Use Value: 2.95 V output swing at 3 V supply preserves >98% of ADC full-scale range, improving weight resolution. |
Use Scenario: Signal conditioning for NTC thermistor in HVAC control modules requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Automotive-grade op-amp providing stable gain and offset compensation across −40 °C to +105 °C. Use Value: 2 mV max input offset and 3 μV/°C drift ensure < ±0.5 °C measurement error over full automotive temperature range. |
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 |
|---|---|---|---|
| MCP6001T-I/OT (Microchip) | 25 μA supply current, 2 mV offset, 100 kHz GBW, same SOT23-5 package. | Lacks AEC-Q100 qualification; not rated for automotive temperature range. | Select when cost sensitivity outweighs automotive qualification need and 5 μA higher ICC is acceptable. |
| LMV321IDBVR (TI) | 65 μA supply current, 7 mV offset, 1 MHz GBW, SOT23-5 package. | Higher power and offset; optimized for general-purpose, not ultra-low-power sensor front-ends. | Choose only if bandwidth >100 kHz is required and battery life is secondary to speed. |
Compared with MCP6001T-I/OT and LMV321IDBVR, TS931AILT uniquely combines AEC-Q100 qualification, 20 μA supply current, and 2 mV max offset in SOT23-5 - making it the only choice for automotive or long-life portable instrumentation demanding all three attributes.
Availability
TS931AILT is available at Aetrix Electronics and suitable for battery-powered systems, portable communication systems, and automotive cabin sensor modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TS931AILT 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, delivering silicon solutions for smart mobility, power, and sensing applications across industrial, automotive, and consumer markets.
The TS93x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, rail-to-rail signal conditioning in space-constrained, battery-dependent instrumentation and safety-critical automotive subsystems.
FAQ
Is TS931AILT pin-compatible with TS931ID (SO-8) or TS931ILT (SOT23-5 without 'A' grade)?
No. TS931AILT uses the SOT23-5 package with pin 1 = In−, pin 2 = In+, pin 3 = V−, pin 4 = Out, pin 5 = V+. TS931ID (SO-8) has different pin count and layout. TS931ILT is identical in pinout but specifies TS931I grade (10 mV max offset), whereas TS931AILT is TS931A grade (5 mV max offset) - same footprint, tighter offset spec.
What is the maximum capacitive load the TS931AILT can drive while maintaining stability?
The TS931AILT is unity-gain stable up to 50 pF capacitive load, as verified in the datasheet (Figure 13–14). Driving >50 pF requires external isolation resistor (e.g., 100 Ω in series with output) to prevent peaking or oscillation, especially when interfacing with ADC input capacitance or long PCB traces.
Does TS931AILT support true single-supply operation with input voltage down to ground?
Yes. The input common-mode range extends to V− −0.2 V (i.e., −0.2 V below ground when V− = 0 V), allowing inputs at 0 V in single-supply configurations. However, output cannot swing fully to 0 V - minimum output is 10 mV at VCC = 3 V, so DC-coupled ground-referenced signals require level-shifting or AC coupling for full-range handling.
How does the TS931B grade differ from TS931A in TS931AILT?
TS931AILT is explicitly the TS931A grade: 5 mV max input offset voltage (vs. 2 mV for TS931B). The 'A' suffix denotes mid-grade performance - tighter than standard TS931I (10 mV max), looser than premium TS931B. All grades share identical supply current (20 μA), bandwidth (100 kHz), and package (SOT23-5).
TS931AILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 5 mV
- Current - Supply:
- 20µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TS931AILT FAQ
1.How can I place an order for TS931AILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS931AILT 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 TS931AILT reliable?
The price and inventory of TS931AILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS931AILT is usually 5 days.
3.What payment methods are accepted for TS931AILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS931AILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS931AILT?
TS931AILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS931AILT 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 TS931AILT?
For technical support, including TS931AILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS931AILT requirements.
6.How does Aetrix verify that TS931AILT is sourced from the original manufacturer or authorized distributors?
All TS931AILT 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 TS931AILT meets industry standards.
7.What is the process for return or replacement of TS931AILT?
All TS931AILT units undergo pre-shipment inspection (PSI). If there is an issue with TS931AILT, 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 TS931AILT part is unused and in its original packaging.
Return procedure for TS931AILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS931AILT Tags
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