TS931BILT - 100kHz Rail-to-Rail Micropower Op Amp | STMicroelectronics
N.º de pieza: TS931BILT ✓ Activo| Cant. | Precio unitario | 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 Descripción general
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.
Alternativas directas para TS931BILT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TS931AILT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TS931ILT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TS941BIDT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MIC7300YM5-TR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MCP6001T-E/OT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TS931BILT Valores máximos y características eléctricas
| Manufacturer | STMicroelectronics |
| Amplifier Type | General Purpose, CMOS, Micropower |
| Number of Circuits | 1 |
| Tipo de salida | 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) |
| Rango de temperatura de funcionamiento | -40 °C to +105 °C |
| Encapsulado / Carcasa | SOT-23-5 |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 (unlimited) |
| Estado RoHS | Compliant |
| Input Stage | CMOS |
| Automotive Grade (AEC-Q100) | Not qualified |
| Datasheet Document | ts931.pdf (STMicroelectronics) |
Configuración de pines de TS931BILT
| Pin 1 | OUT — Amplifier output (rail-to-rail) |
| Pin 2 | VCC- — Negative supply (ground in single-supply operation) |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | IN- — Inverting input |
| Pin 5 | VCC+ — Positive supply (2.7 V to 10 V) |
Aplicaciones típicas
TS931BILT es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TS931BILT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Second-generation 'B' precision improvement (frente a TS931AILT)
- Higher GBW than TS94x family (frente a TS941BIDT)
- Single-supply rail-to-rail output swing (frente a MCP6001T-E/OT)
Notas de diseño
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.
Información de cumplimiento
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.
