TS931BILT - 100kHz Rail-to-Rail Micropower Op Amp | STMicroelectronics
Référence : TS931BILT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.45 | $1,45 |
| 10 | $1.28 | $12,80 |
| 100 | $0.98 | $98,00 |
| 500 | $0.82 | $410,00 |
| 1 000 | $0.71 | $710,00 |
| 3 000 | $0.58 | $1 740,00 |
TS931BILT Présentation
An operational amplifier (op-amp) is a high-gain DC-coupled electronic voltage amplifier with differential inputs and, typically, a single-ended output. Within the broader signal-conditioning hierarchy, op-amps sit between transducers/ADC front ends and downstream digital processing; rail-to-rail output variants extend the usable output swing to nearly both supply rails, maximizing dynamic range in low-voltage systems. Micropower CMOS op-amps like the TS931BILT optimize this topology for low-Iq operation, trading GBW and slew rate for extended battery life in handheld, IoT, and remote-sensor designs.
Key specifications include a 2.7 V to 10 V supply range, 100 kHz GBW, rail-to-rail output (reaching 2.9 Vpp with RL = 100 kΩ at 3 V supply), CMOS input stage, and an operating temperature range of -40 °C to +105 °C. The SOT-23-5 package is among the smallest standard op-amp footprints, enabling compact PCB layouts in space-constrained designs.
Architecturally, the TS931BILT uses a CMOS input stage with a class-AB output stage to deliver rail-to-rail output swing at low quiescent current. The 'B' suffix denotes the enhanced second-generation variant, offering improved offset and noise compared with the original TS931, while the 'I' in 'ILT' indicates the industrial temperature grade (-40 °C to +105 °C).
Typical applications include battery-powered instrumentation, portable medical devices, sensor signal conditioning, active filters, and transducer interfaces. The micropower Iq makes it ideal for always-on circuits where sleep current must be minimized.
When designing with this op-amp, note that the CMOS inputs have lower bias current than bipolar alternatives but may exhibit higher leakage at elevated temperatures. Decouple the supply with a 100 nF ceramic capacitor placed close to the VCC pin to suppress noise.
This page synthesizes distributor pricing, drop-in alternatives within the same SOT-23-5 footprint, and practical design notes that go beyond the manufacturer datasheet, helping engineers select the right op-amp quickly.
Alternatives de remplacement direct pour TS931BILT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
TS931AILT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TS931ILT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TS941BIDT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MIC7300YM5-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MCP6001T-E/OT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TS931BILT Valeurs maximales et caractéristiques électriques
| Manufacturer | STMicroelectronics |
| Amplifier Type | General Purpose, CMOS, Micropower |
| Number of Circuits | 1 |
| Type de sortie | Rail-to-Rail |
| Gain Bandwidth Product (GBW) | 100 kHz |
| Supply Voltage Range (Single Supply) | 2.7 V to 10 V |
| Output Swing | 2.9 Vpp (RL = 100 kΩ at 3 V supply) |
| Plage de température de fonctionnement | -40 °C to +105 °C |
| Boîtier / Format | SOT-23-5 |
| Type de montage | Surface Mount |
| Niveau MSL | 1 (unlimited) |
| Statut RoHS | Compliant |
| Input Stage | CMOS |
| Automotive Grade (AEC-Q100) | Not qualified |
| Datasheet Document | ts931.pdf (STMicroelectronics) |
Configuration des broches de TS931BILT
| Broche 1 | OUT — Amplifier output (rail-to-rail) |
| Broche 2 | VCC- — Negative supply (ground in single-supply operation) |
| Broche 3 | IN+ — Non-inverting input |
| Broche 4 | IN- — Inverting input |
| Broche 5 | VCC+ — Positive supply (2.7 V to 10 V) |
Applications typiques
TS931BILT convient pour 6 applications: Battery-Powered Sensor Signal Conditioning, Portable Medical and Wearable Devices, Active Filters and Audio Sub-Circuits, Transducer Interface Amplifiers, IoT and Remote Sensor Nodes, Smoke Detectors and Always-On Safety Monitors.
Battery-Powered Sensor Signal Conditioning
The TS931BILT's micropower quiescent current and CMOS-input pA-level bias currents make it ideal for battery-powered sensor front ends. Its rail-to-rail output swing maximizes dynamic range when powered directly from a 3 V coin cell or 3.3 V regulated rail. The 100 kHz GBW is sufficient for thermocouple, pH probe, and photodiode transimpedance amplifiers. Unlike bipolar op-amps, the CMOS input does not load high-impedance sources, preserving measurement accuracy in low-power IoT sensor nodes.
Recommandé
Portable Medical and Wearable Devices
Wearable health monitors and portable medical instruments require op-amps that combine low Iq, small package, and rail-to-rail output for battery longevity and compact PCB layouts. The TS931BILT in SOT-23-5 fits both requirements while its industrial -40 °C to +105 °C temperature range covers body-worn applications. The 2.7 V to 10 V supply range accommodates single-cell Li-ion (3.7 V nominal) and two-cell alkaline (3 V) chemistries. Per the ST ts931.pdf datasheet, the CMOS input minimizes patient-leakage current in ECG front-end buffers.
Recommandé
Active Filters and Audio Sub-Circuits
The TS931BILT's 100 kHz GBW is well-matched to active low-pass and high-pass filters in the audio band and below, including Sallen-Key topologies for anti-aliasing before an ADC. The rail-to-rail output maximizes the signal swing into a 3.3 V ADC, eliminating the gain-stage attenuation often required with non-rail-to-rail op-amps. Its low Iq makes it suitable for always-on filter chains in audio codecs and hearing-aid pre-amplifiers. Note that for high-fidelity audio paths above 20 kHz, a wider-BW op-amp is recommended.
Recommandé
Transducer Interface Amplifiers
Industrial and consumer products frequently need to amplify signals from strain gauges, pressure sensors, and thermistors. The TS931BILT's CMOS inputs deliver pA-level bias current that does not disturb high-impedance bridge sensors, while its rail-to-rail output preserves dynamic range across the full 2.7 V to 10 V supply. Per the ST ts931.pdf datasheet, the 'B' generation's tighter input offset voltage enables accurate DC amplification without periodic auto-zero, simplifying firmware.
Recommandé
IoT and Remote Sensor Nodes
IoT endpoints running on coin cells or energy harvesting need every microamp of quiescent current justified. The TS931BILT's micropower Iq and rail-to-rail swing enable sensor signal chains that spend most of their life in deep sleep yet still deliver full-range ADC readings on wake-up. The SOT-23-5 package keeps the PCB footprint minimal, leaving room for radios and MCUs. The wide 2.7 V to 10 V supply range supports both primary batteries and small Li-ion packs without an extra regulator.
Recommandé
Smoke Detectors and Always-On Safety Monitors
Battery-powered smoke and CO detectors spend years in standby, waking periodically to read a sensor. The TS931BILT's micropower consumption extends battery life, while its rail-to-rail output delivers full dynamic range from low-voltage chemistries. The CMOS input stage does not load the high-impedance ionization chamber or electrochemical cell, preserving measurement integrity. Per ST's ts931.pdf datasheet, the industrial -40 °C to +105 °C range covers residential and light-industrial alarm installations.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TS931BILT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TS931AILT | TS931ILT | TS941BIDT | MIC7300YM5-TR | MCP6001T-E/OT |
|---|---|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 (M5) | SOT-23-5 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Microchip Technology | Microchip Technology |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
| Generation | 'B' (2nd gen) | 'A' (1st gen) | Original (no letter) | 'B' (TS94x family) | Standalone | Standalone |
| Channels | 1 | 1 | 1 | 1 | 1 | 1 |
Principaux différenciateurs
- Second-generation 'B' precision improvement (vs TS931AILT)
- Higher GBW than TS94x family (vs TS941BIDT)
- Single-supply rail-to-rail output swing (vs MCP6001T-E/OT)
Notes de conception
The TS931BILT operates from a single 2.7 V to 10 V supply. Place a 100 nF ceramic decoupling capacitor as close as possible to the VCC+ pin (pin 5), with a low-ESR 10 µF bulk capacitor on the supply rail nearby. For dual-supply operation, also decouple VCC- (pin 2) with a 100 nF cap. Estimated: with 5 V supply and 2 kΩ load, the op-amp draws under 1 mA quiescent + signal current; a 10 µF bulk supports burst loads up to 10 mA without rail sag.
Route the high-impedance IN+ and IN- traces (pins 3 and 4) away from noisy digital or switching-power traces to minimize coupled noise. Use a ground plane beneath the SOT-23-5 footprint and keep input trace lengths under 5 mm where possible. The exposed SOT-23-5 pad (if any, package variant-dependent) should be left floating or tied to VCC- to reduce leakage. Keep the OUT pin (pin 1) trace short to reduce capacitive loading that could degrade phase margin at high frequencies.
Do not assume the TS931BILT can drive large capacitive loads directly - stability is specified for moderate load capacitances; add a 50 Ω-200 Ω series output resistor if driving cables or large filter caps. Avoid reverse-supply connections: although the ESD diodes conduct, exceeding -0.3 V on VCC+ relative to VCC- can permanently damage the part. Per the ST ts931.pdf datasheet, the CMOS inputs can tolerate ESD up to ±2 kV HBM, but additional external protection is advised for industrial environments.
Informations de conformité
RoHS and lead-free per STMicroelectronics product page and distributor listings. Not AEC-Q100 qualified - this is an industrial-grade part. Halogen-free status not explicitly stated in verified data; marked unknown.
