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STMicroelectronics TS931BIDT
- Part No.:
- TS931BIDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS931BIDT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,817
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Product details
Overview
TS931BIDT from STMicroelectronics is a single-channel rail-to-rail output micropower operational amplifier optimized for low-voltage, battery-powered systems. It operates from 2.7 V to 10 V, consumes only 20 μA typical supply current, delivers 2.95 V output high level at 3 V supply (RL = 100 kΩ), features 2 mV max input offset voltage (TS931B grade), and offers ultra-low 1 pA input bias current - enabling precision sensing in portable instrumentation and automotive-grade smoke detectors.
For engineers reviewing the TS931BIDT datasheet, TS931BIDT pinout, TS931BIDT application, or TS931BIDT equivalent, this device is selected for ultra-low-power analog signal conditioning where rail-to-rail output swing, sub-μA quiescent current, and guaranteed 2 mV offset at +105 °C are critical design requirements.
Technical Context
The TS931BIDT uses CMOS input stage architecture to achieve 1 pA input bias current and rail-to-rail output swing via complementary push-pull output transistors. Its internal compensation ensures stable unity-gain operation with 65° phase margin at CL = 50 pF, supporting direct sensor interfacing without external compensation.
It is specified across –40 °C to +105 °C with guaranteed performance: 2 mV max Vio, 20 μA max ICC at 3 V, 100 kHz gain-bandwidth product, and 50 V/ms slew rate - all validated under automotive-grade operating conditions per AEC-Q100-aligned qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports single-cell Li-ion, two-cell alkaline, and automotive 5 V rails without level-shifting. |
| Input Offset Voltage (max) | 2 mV at +105 °C - enables <1% error in 12-bit ADC front-end with 3.3 V reference without trimming. |
| Supply Current (typ) | 20 μA per amplifier - allows >1-year battery life in coin-cell–powered pH meters with 10-second wake-up intervals. |
| Output Swing (RL = 100 kΩ) | 0.01 V to VCC–0.01 V at 3 V - delivers full dynamic range into high-impedance ADC inputs or comparator thresholds. |
| Input Bias Current (typ) | 1 pA - prevents >1 mV error when amplifying signals from high-Z pH electrodes or piezoresistive sensors. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., thermistor, strain gauge) with stable closed-loop response. |
| Common-Mode Rejection | 85 dB - rejects power-supply ripple and EMI coupling in noisy automotive cabin environments. |
Pinout & Package
TS931BIDT is supplied in SO-8 package (ECOPACK® compliant), measuring 4.9 mm × 6.0 mm × 1.75 mm, with standard 1.27 mm pitch and gull-wing leads suitable for automated reflow assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–) | Differential input node; accepts signals referenced to VCC–; high-impedance CMOS input (1 pA bias). |
| 2 | Non-inverting Input (+) | Differential input node; used for unity-gain buffer or differential-to-single-ended conversion. |
| 3 | Output | Rail-to-rail voltage source/sink; drives 100 kΩ load to within 10 mV of either rail at 3 V supply. |
| 4 | VCC– (Ground) | Negative supply terminal; must be connected to system ground or lowest potential rail. |
| 5 | VCC+ | Positive supply terminal; accepts 2.7–10 V; decoupling capacitor required near pin for stability. |
| 6–8 | No Connect (NC) | Internally unconnected; left floating or tied to ground per layout best practice to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable 2.99 Vpp output at 3 V supply into 100 kΩ, maximizing ADC resolution without external level-shifting. |
| Micropower operation | 20 μA supply current enables multi-year operation on CR2032 cells in wireless sensor nodes with 10 s wake-up cycles. |
| Automotive-grade temperature range | –40 °C to +105 °C operation with guaranteed 2 mV offset and 20 μA ICC supports under-hood and cabin applications. |
| ESD protection | 2 kV HBM rating protects against handling damage during PCB assembly and field service in industrial environments. |
| CMOS input stage | 1 pA input bias current eliminates voltage error across high-value feedback resistors (>10 MΩ) used in precision integrators. |
Applications
| Portable pH Meter | Battery-Powered Smoke Detector |
|---|---|
|
Use Scenario: Amplifying microamp-level current from glass pH electrode into 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance amplifier with rail-to-rail output driving ADC reference range. Use Value: 1 pA input bias avoids >10 mV offset error across 10 GΩ electrode impedance; 2 mV Vio ensures ±0.02 pH accuracy over full temperature range. |
Use Scenario: Signal conditioning for ionization chamber current in UL-listed residential smoke alarms. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier feeding window comparator for alarm threshold detection. Use Value: 20 μA ICC extends AA battery life beyond 10 years; 85 dB CMRR rejects 60 Hz mains coupling in wall-powered backup mode. |
| Automotive Cabin Temperature Sensor | Digital Kitchen Scale Load Cell Interface |
|
Use Scenario: Amplifying PT1000 RTD bridge output in HVAC control module exposed to under-dash thermal cycling. IC Role / Device Role / Timing Role: Instrumentation-grade buffer with matched input impedance and rail-to-rail output for ADC input protection. Use Value: Guaranteed 2 mV Vio at +105 °C eliminates need for factory calibration; SO-8 package withstands 250 °C soldering per JEDEC J-STD-020. |
Use Scenario: Amplifying mV-level Wheatstone bridge output from strain gauges in battery-operated digital scales. IC Role / Device Role / Timing Role: Micropower instrumentation amplifier front-end with 100 kHz GBW for fast weight settling (<500 ms). Use Value: 100 kHz bandwidth resolves mechanical vibration without aliasing; 20 μA ICC enables >2-year operation on two AAA cells. |
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 |
|---|---|---|---|
| LMV321IDBVR | Higher 80 μA ICC, 1 mV Vio (max), no automotive temp grade | Limited to commercial-grade portable devices; not qualified for automotive or extended-temp industrial use | Select if cost sensitivity outweighs battery life and temperature robustness requirements |
| MCP6001T-E/OT | 25 μA ICC, 3 mV Vio (max), 100 kHz GBW, same SO-8 footprint | Validated for industrial temp range only (–40 °C to +85 °C); lacks AEC-Q100 alignment | Choose when automotive qualification is unnecessary but SO-8 compatibility and 1 pA input bias are retained |
Compared with LMV321IDBVR and MCP6001T-E/OT, TS931BIDT uniquely combines automotive-grade temperature validation, 2 mV offset guarantee at +105 °C, and 20 μA supply current - making it the only option for long-life, high-accuracy sensing in harsh-environment battery systems.
Availability
TS931BIDT is available at Aetrix Electronics and suitable for battery-powered smoke detectors, portable pH meters, and automotive cabin temperature sensors requiring stable component supply with guaranteed long-term availability and automotive qualification.
Supply support for TS931BIDT 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 TS93x series was developed specifically for ultra-low-power precision analog signal conditioning in space-constrained, battery-dependent applications - emphasizing rail-to-rail output, sub-μA quiescent current, and extended-temperature reliability.
FAQ
What is the maximum capacitive load the TS931BIDT can drive while maintaining stability?
The TS931BIDT is internally compensated for unity-gain stability with up to 50 pF capacitive load, as verified by 65° phase margin in Figure 13 of the datasheet. Driving >50 pF requires external isolation resistor (≥100 Ω) between output and load capacitance to prevent peaking or oscillation.
Does TS931BIDT support true rail-to-rail input common-mode range?
No - the TS931BIDT has CMOS inputs with rail-to-rail output only. Its common-mode input voltage range is specified as VCC– – 0.2 V to VCC+ – 1.5 V, meaning it cannot accept signals within 1.5 V of VCC+; this excludes direct sensing of VCC-referenced signals without attenuation.
Is the TS931BIDT pin-compatible with other TS93x variants like TS931IDT or TS931AIDT?
Yes - all TS931x variants (IDT, AIDT, BIDT) share identical SO-8 pinout, footprint, and electrical interface. The suffix denotes offset voltage grade (1 mV/5 mV/2 mV max), not pin function or package change, enabling drop-in replacement during design-in or qualification.
Can TS931BIDT operate reliably at 2.5 V supply?
No - the absolute minimum supply voltage is 2.7 V per Table 2 (Absolute Maximum Ratings). Operation below 2.7 V risks undefined behavior, including loss of rail-to-rail output swing, increased offset drift, and failure to meet 2 mV Vio specification; 2.7 V is the guaranteed lower limit for full parametric compliance.
TS931BIDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 2 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
TS931BIDT FAQ
1.How can I place an order for TS931BIDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS931BIDT 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 TS931BIDT reliable?
The price and inventory of TS931BIDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS931BIDT is usually 5 days.
3.What payment methods are accepted for TS931BIDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS931BIDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS931BIDT?
TS931BIDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS931BIDT 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 TS931BIDT?
For technical support, including TS931BIDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS931BIDT requirements.
6.How does Aetrix verify that TS931BIDT is sourced from the original manufacturer or authorized distributors?
All TS931BIDT 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 TS931BIDT meets industry standards.
7.What is the process for return or replacement of TS931BIDT?
All TS931BIDT units undergo pre-shipment inspection (PSI). If there is an issue with TS931BIDT, 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 TS931BIDT part is unused and in its original packaging.
Return procedure for TS931BIDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS931BIDT Tags
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LM358DT
STMicroelectronics
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