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STMicroelectronics TS931AID
- Part No.:
- TS931AID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS931AID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,263
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Product details
Overview
TS931AID from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier in SO-8 package, designed for ultra-low-power signal conditioning in battery-constrained systems. It operates from 2.7 V to 10 V, consumes only 20 μA typical supply current, delivers 2.95 V high-level and 10 mV low-level output swing at 3 V supply (RL = 100 kΩ), and features 1 pA input bias current and 2 mV max input offset voltage (TS931B grade), enabling precision sensing in portable PH meters and digital scales.
For engineers reviewing the TS931AID datasheet, TS931AID pinout, TS931AID application, or TS931AID equivalent, key selection criteria include micropower operation under 3 V, rail-to-rail output drive into 100 kΩ, CMOS input stage with sub-pA bias, automotive-grade temperature range (−40 °C to +105 °C), and SO-8 footprint compatibility with legacy TS931 designs.
Technical Context
The TS931AID implements a CMOS-input, rail-to-rail output op-amp architecture optimized for single-supply operation down to 2.7 V. Its input stage achieves 1 pA typical bias current and 2 mV max offset (B-grade), while the output stage delivers >99% of rail-to-rail swing with 1.5 mA source/sink capability at 3 V.
It exhibits 100 kHz gain-bandwidth product, 50 V/ms slew rate, 85 dB CMRR and SVRR (B-grade), and stable phase margin (65°) with 50 pF capacitive load - confirming suitability for unity-gain buffer and sensor interface configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports direct Li-ion or dual-AA battery operation without regulation |
| Supply Current (Typ.) | 20 μA per amplifier - enables multi-year battery life in always-on smoke detectors |
| Input Bias Current (Typ.) | 1 pA - minimizes voltage error in high-impedance pH electrode and photodiode interfaces |
| Input Offset Voltage (Max.) | 2 mV (TS931B grade) - ensures ≤0.2% full-scale error in 1 V-range digital scale front-ends |
| Output Swing (3 V, RL=100k) | 10 mV to 2.95 V - delivers true rail-to-rail dynamic range for ADC input buffering |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning with stability margin |
| Common-Mode Rejection | 85 dB (min.) - rejects power supply ripple and EMI in noisy automotive environments |
Pinout & Package
TS931AID is housed in an industry-standard SO-8 (Small Outline-8) package with 1.27 mm pitch, 4.9 mm × 6.0 mm body, and ECOPACK® RoHS-compliant finish. Pin 1 is marked with a dot or notch; device orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | In− | Inverting input - high-impedance CMOS node; requires guarding in <1 pA leakage designs |
| 2 | In+ | Non-inverting input - referenced to VCC− (GND); common-mode range extends to VCC− −0.2 V |
| 3 | Out | Amplifier output - rail-to-rail capable; drives 100 kΩ load to within 10 mV of rails at 3 V |
| 4 | VCC− | Negative supply / ground terminal - must be connected directly to low-impedance GND plane |
| 5 | VCC+ | Positive supply input - accepts 2.7–10 V; decoupling capacitor required within 5 mm |
| 6–8 | NC | No connect - internally unconnected; left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable 2.95 Vpp output at 3 V supply into 100 kΩ - eliminates need for level-shifting in low-voltage ADC interfaces |
| Micropower consumption | 20 μA typical ICC enables >5-year battery life in coin-cell-powered smoke detectors operating at 1 Hz wake-up rate |
| Ultra-low input bias current | 1 pA typical Iib preserves signal integrity in >100 MΩ sensor bridges and glass pH electrodes |
| Automotive-grade temperature range | −40 °C to +105 °C operation validated per AEC-Q100 - suitable for under-hood sensor modules without derating |
| ESD protection | 2 kV HBM rating protects against handling damage during PCB assembly and field service |
Applications
| PH Meter Front-End | Digital Scale Load Cell Interface |
|---|---|
Use Scenario: Amplifying mV-level output from glass pH electrode in handheld or benchtop meter. IC Role / Device Role / Timing Role: Precision DC-coupled buffer with ultra-high input impedance and minimal offset drift. Use Value: 1 pA bias current prevents electrode polarization; 2 mV max offset contributes <0.02 pH error across 0–14 pH range. | Use Scenario: Conditioning Wheatstone bridge output from strain-gauge load cell in battery-powered kitchen scale. IC Role / Device Role / Timing Role: Low-noise, micropower instrumentation amplifier front-end stage. Use Value: 20 μA supply current extends CR2032 battery life beyond 2 years; rail-to-rail output maximizes 12-bit ADC utilization. |
| Automotive Cabin CO Sensor | Portable Smoke Detector Signal Chain |
Use Scenario: Amplifying electrochemical sensor output in vehicle cabin air quality module. IC Role / Device Role / Timing Role: Single-supply signal conditioner operating across full automotive temperature range. Use Value: −40 °C to +105 °C rating ensures reliability without thermal derating; 85 dB CMRR rejects alternator noise. | Use Scenario: Battery-monitoring and alarm-trigger amplification in UL-certified residential smoke detector. IC Role / Device Role / Timing Role: Always-on comparator reference buffer and sensor signal amplifier. Use Value: 20 μA quiescent current enables 10-year shelf life on 9 V alkaline; latch-up immunity prevents false alarms during ESD events. |
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 |
|---|---|---|---|
| TS931ID | Higher 15 mV max input offset (vs. 2 mV for TS931AID); same package and pinout | Acceptable where system calibration compensates offset; not suitable for uncalibrated pH or precision scale use | Select TS931ID only when cost sensitivity outweighs offset-critical performance requirements |
| MCP6001T-I/OT | Lower 100 nA max input bias current (vs. 300 pA for TS931AID); 150 μA supply current (vs. 20 μA) | Higher power draw limits battery life; higher bias current degrades high-Z sensor accuracy | Choose MCP6001 only if wider 1.8–6.0 V supply range is required and 20 μA budget is relaxed |
Compared with TS931ID and MCP6001T-I/OT, TS931AID uniquely balances sub-2 mV offset, sub-pA bias, and 20 μA consumption in SO-8 - making it optimal for uncalibrated, battery-constrained, high-impedance sensor nodes where long-term stability and minimal error budget are critical.
Availability
TS931AID is available at Aetrix Electronics and suitable for battery-powered systems, portable communication systems, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TS931AID 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 intelligent power, analog, MEMS, and microcontroller solutions for 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- and energy-constrained applications such as portable medical devices and battery-operated environmental sensors.
FAQ
What is the maximum operating supply voltage for TS931AID?
The absolute maximum supply voltage is 12 V, but the recommended operating range is 2.7 V to 10 V per the datasheet. Operation above 10 V risks exceeding safe junction temperature and violates specified electrical characteristics - sustained use beyond 10 V may cause irreversible parametric shift or latch-up.
Does TS931AID support true rail-to-rail input common-mode range?
No - TS931AID features rail-to-rail *output* swing but has a limited input common-mode range of VCC− −0.2 V to VCC+ −1.5 V. At 3 V supply, inputs must stay between −0.2 V and 1.5 V; exceeding this range causes increased offset and potential phase reversal in certain conditions.
Can TS931AID drive capacitive loads without oscillation?
Yes - the device maintains 65° phase margin with up to 50 pF capacitive load, as verified in Figure 13 of the datasheet. For loads >50 pF, external isolation resistor (≥100 Ω) between output and capacitance is required to preserve stability in unity-gain configurations.
Is TS931AID qualified for automotive applications?
TS931AID itself is not automotive-grade; only variants marked "TS931BIDT" or "TS931IYDT" carry AEC-Q100 qualification. TS931AID is rated for −40 °C to +105 °C industrial operation but lacks automotive-specific screening, failure-in-time (FIT) reporting, and PPAP documentation required for Tier-1 automotive deployment.
TS931AID 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:
- 0.05V/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:
- 8-SOIC
TS931AID FAQ
1.How can I place an order for TS931AID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS931AID 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 TS931AID reliable?
The price and inventory of TS931AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS931AID is usually 5 days.
3.What payment methods are accepted for TS931AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS931AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS931AID?
TS931AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS931AID 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 TS931AID?
For technical support, including TS931AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS931AID requirements.
6.How does Aetrix verify that TS931AID is sourced from the original manufacturer or authorized distributors?
All TS931AID 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 TS931AID meets industry standards.
7.What is the process for return or replacement of TS931AID?
All TS931AID units undergo pre-shipment inspection (PSI). If there is an issue with TS931AID, 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 TS931AID part is unused and in its original packaging.
Return procedure for TS931AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS931AID 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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