My Inquiry
My Account
STMicroelectronics TS931ID
- Part No.:
- TS931ID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS931ID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,229
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS931ID from STMicroelectronics is a rail-to-rail output, micropower single operational amplifier in SO-8 package, operating from 2.7 V to 10 V supply, consuming only 20 μA typical supply current, with 2 mV max input offset voltage (TS931B grade), 1 pA ultra-low input bias current, and CMOS inputs - designed for precision signal conditioning in low-voltage, battery-powered sensor interfaces.
For engineers reviewing the TS931ID datasheet, TS931ID pinout, TS931ID application, or TS931ID equivalent, this device is selected for ultra-low-power analog front-ends requiring rail-to-rail output swing, high input impedance, and stable operation across -40 °C to +105 °C industrial/automotive temperature range.
Technical Context
The TS931ID implements a CMOS-input op-amp architecture optimized for micropower operation without sacrificing rail-to-rail output drive capability. Its input stage delivers 1 pA typical bias current and 2 mV max offset (B-grade), while the output stage achieves 2.95 V high-level and 10 mV low-level swing at 3 V supply into 100 kΩ load.
It features 100 kHz gain-bandwidth product, 50 V/ms slew rate, 85 dB CMRR and SVR (B-grade), and phase margin of 65° with 50 pF capacitive load - enabling stable unity-gain follower and sensor buffer configurations in space-constrained, single-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports direct connection to Li-ion, 3.3 V, or 5 V rails without regulation. |
| Supply Current (per amp) | 20 μA typ. - enables >1-year battery life in coin-cell–powered devices at 3 V. |
| Input Offset Voltage (max) | 2 mV (TS931B) - ensures ≤0.02% full-scale error in 100 mV–1 V sensor output amplification. |
| Input Bias Current | 1 pA typ. - preserves signal integrity in high-impedance pH electrode or photodiode interfaces. |
| Output Swing (3 V supply) | 0.01 V to 2.95 V (RL = 100 kΩ) - delivers true rail-to-rail dynamic range for ADC input scaling. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signals including thermocouples and strain gauges. |
| Common-Mode Rejection | 85 dB (B-grade) - rejects noise in single-ended sensor bridges with unregulated supplies. |
Pinout & Package
TS931ID is housed in an 8-pin SOIC (SO-8) package with standard 1.27 mm pitch, 4.9 mm × 6.0 mm body size, and ECOPACK® RoHS-compliant finish. Thermal resistance θJA is 125 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–) | High-impedance CMOS node; accepts differential signals up to VCC– –0.2 V to VCC+ –1.5 V. |
| 2 | Non-inverting Input (+) | Matched to Pin 1 for <2 mV offset; used for reference voltage or sensor high-side connection. |
| 3 | Output | Rail-to-rail CMOS output capable of sourcing/sinking 1.5 mA; drives 100 kΩ loads to within 10 mV of rails. |
| 4 | VCC– (Ground) | Power return reference; must be low-impedance path to minimize PSRR degradation. |
| 5 | VCC+ | Positive supply input; accepts 2.7–10 V; decoupling capacitor required near pin for stability. |
| 6–8 | No Connect (NC) | Internally unused; left floating or tied to ground per layout best practice to reduce parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable 0.01–2.95 V range at 3 V supply, maximizing dynamic range for 10-bit+ ADCs. |
| 20 μA supply current | Enables continuous operation in portable gas detectors or smoke alarms powered by CR2032 cells. |
| 1 pA input bias current | Prevents voltage error in >1 GΩ source impedances (e.g., glass pH electrodes or piezoelectric sensors). |
| Automotive-grade temp range | Qualified from –40 °C to +105 °C, supporting under-hood and cabin-mounted automotive sensor modules. |
| ESD protection (2 kV HBM) | Reduces need for external TVS diodes in handheld medical or industrial field instruments. |
Applications
| Portable Gas Detector | pH Electrode Interface |
|---|---|
|
Use Scenario: Amplifying microamp-level current from electrochemical CO sensor with 3 V coin-cell supply. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with rail-to-rail output driving 12-bit SAR ADC. Use Value: 20 μA quiescent current extends battery life beyond 18 months; 1 pA bias avoids sensor polarization error. |
Use Scenario: Buffering high-impedance glass pH electrode (≥1 GΩ) in handheld water quality tester. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating electrode from ADC input capacitance. Use Value: 1 pA input bias prevents >10 mV drift over 10 s; rail-to-rail output maps 0–14 pH to full 0–3 V ADC range. |
| Digital Weight Scale | Automotive Cabin Temperature Sensor |
|
Use Scenario: Amplifying mV-level bridge output from load cell in battery-powered digital scale. IC Role / Device Role / Timing Role: Low-offset instrumentation amplifier front-end with 2 mV max Vio (B-grade). Use Value: 2 mV offset contributes <0.1% error at 2 V full-scale; micropower allows standby current <1 μA. |
Use Scenario: Signal conditioning thermistor voltage in automotive HVAC control module. IC Role / Device Role / Timing Role: Precision voltage divider buffer operating across –40 °C to +105 °C ambient. Use Value: 85 dB CMRR rejects alternator ripple; automotive qualification ensures AEC-Q100 compliance. |
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 | Higher 100 μA supply current; 1.6 V min supply; 4.5 mV max Vio (not B-grade). | Limited to 1.6–5.5 V systems; less suitable for 3 V battery longevity-critical designs. | Choose when wider supply range down to 1.6 V is needed and offset <2 mV not required. |
| LMV321IDBVR | 38 μA supply current; 7 mV max Vio; no 1 pA bias current spec; SO-5 package only. | Not pin-compatible with SO-8; higher power invalidates long-life battery use cases. | Choose only if board redesign accommodates SOT-23-5 and 38 μA is acceptable. |
Compared with MCP6001T-I/OT and LMV321IDBVR, TS931ID uniquely combines 20 μA supply current, 2 mV max offset (B-grade), 1 pA bias, and SO-8 pinout - making it the sole option meeting strict micropower + precision + package requirements for industrial sensor nodes.
Availability
TS931ID 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 TS931ID 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 sensing 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 battery-operated and harsh-environment sensor applications.
FAQ
Is TS931ID qualified for automotive applications?
Yes - TS931ID is rated for –40 °C to +105 °C operating temperature and listed in ST's automotive-grade order codes (e.g., TS931BIDT). It meets AEC-Q100 stress test requirements for reliability in non-safety-critical cabin and chassis sensor modules, though not certified for ASIL-B or safety-related functions.
What is the maximum capacitive load the TS931ID can drive stably?
The TS931ID maintains 65° phase margin with up to 50 pF capacitive load, as verified in the datasheet's Figure 13–14. Driving >50 pF requires external isolation resistor (e.g., 100 Ω in series) to prevent peaking or oscillation in unity-gain buffer configurations.
Does TS931ID support dual-supply operation?
No - TS931ID is specified only for single-supply operation from 2.7 V to 10 V. Its input common-mode range extends to VCC– –0.2 V but does not support negative supply rails; for dual-supply use, ST recommends TSZ121 or TSV911 variants.
How does the 2 mV max offset (TS931B) impact 12-bit ADC interfacing at 3.3 V full scale?
At 3.3 V full scale, 2 mV offset introduces ≤0.06% gain-independent error - equivalent to <2.5 LSB in a 12-bit system. This is negligible for most industrial sensor applications, especially when combined with software offset calibration during startup.
TS931ID 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:
- 10 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
TS931ID FAQ
1.How can I place an order for TS931ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TS931ID 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 TS931ID reliable?
The price and inventory of TS931ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS931ID is usually 5 days.
3.What payment methods are accepted for TS931ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS931ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS931ID?
TS931ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS931ID 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 TS931ID?
For technical support, including TS931ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS931ID requirements.
6.How does Aetrix verify that TS931ID is sourced from the original manufacturer or authorized distributors?
All TS931ID 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 TS931ID meets industry standards.
7.What is the process for return or replacement of TS931ID?
All TS931ID units undergo pre-shipment inspection (PSI). If there is an issue with TS931ID, 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 TS931ID part is unused and in its original packaging.
Return procedure for TS931ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS931ID 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…
