TS944IN - 4-Channel 10 kHz Rail-to-Rail Op Amp | STMicroelectronics
N.º da peça: TS944IN ✗ Fim de vidaTS944IN Visão geral
An operational amplifier, or op amp, is a high-gain analog signal-processing IC used to compare an input with a feedback-defined reference, amplify weak signals, buffer voltage sources, and implement active analog filters. Within the component hierarchy, the TS944IN is a quad operational amplifier, a type of linear amplifier and analog IC intended for low-power signal-conditioning systems.
The TS944IN family emphasizes low power consumption and rail-to-rail output operation. Its 10 kHz gain-bandwidth product supports low-frequency amplification and filtering, while the 4.5 mV/us slew rate limits how quickly its output can change. Typical input bias current is 1 pA, which is useful when high-impedance sensors or sensing nodes must not be loaded heavily. The listed typical input offset voltage is 10 mV.
STMicroelectronics describes the TS94x family as rail-to-rail micropower operational amplifiers for 2.5 V to 10 V operation. Four amplifiers in one package reduce board area and simplify design for systems that need several independent analog channels. The TS944IN is identified as a general-purpose amplifier and an obsolete catalog item, so lifecycle planning should account for its non-active status.
Typical circuit roles include battery-powered sensor interfaces, low-frequency active filters, portable measurement systems, and general-purpose signal conditioning. Because the gain-bandwidth product is only 10 kHz, the device is better suited to slow analog signals than to high-speed waveform or video paths. Its rail-to-rail output also requires careful review of the input common-mode range for each operating condition.
Design with the TS944IN using supply bypassing close to the power pins and verify each amplifier's feedback network, output load, input bias requirements, and stable operating gain. Because the input offset voltage can reach 10 mV typ. in the published summary, precision measurements may require calibration, offset correction, or a higher-accuracy amplifier.
This page organizes the manufacturer specifications, lifecycle status, sourcing path, and practical application guidance for TS944IN. It also distinguishes genuine same-footprint replacements from different-package family members, helping engineers avoid substitutions that require PCB changes.
Alternativas drop-in para TS944IN — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasTS944IN Classificações máximas e características elétricas
| Number of Circuits | 4 circuits |
| Amplifier Type | General-purpose operational amplifier |
| Tipo de saída | Rail-to-rail |
| Supply Voltage Range | 2.5 V to 10 V |
| Gain-Bandwidth Product | 10 kHz |
| -3 dB Bandwidth | 10 kHz |
| Slew Rate | 0.0045 V/us |
| Corrente de alimentação | 1.2 uA per amplifier |
| Input Bias Current | 1 pA typical |
| Input Offset Voltage | 10 mV typical |
| Output Current | 5 mA typical |
| Faixa de temperatura de operação | -40 C to +85 C |
| Temperature Grade | Industrial |
| Encapsulamento | 14-DIP, 0.300 inch pitch |
| Tipo de montagem | Through-hole |
Guia de Configuração de Pinos do TS944IN 14-dip, 0.300 inch pitch
Configuração de pinos para TS944IN (pacote 14-dip, 0.300 inch pitch). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para TS944IN.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TS944IN é adequado para 6 aplicaçãos: Battery-Powered Sensor Conditioning, Portable Measurement Instruments, Low-Frequency Active Filters, Industrial Control Signal Conditioning, Threshold Detection and Comparators, Legacy Through-Hole Control Boards.
Battery-Powered Sensor Conditioning
The TS944IN fits low-voltage sensor interfaces where every milliamp of supply current matters. Its 1.2 uA typical supply current per amplifier and 1 pA typical input bias current reduce loading on high-impedance sensing nodes, while the 10 kHz gain-bandwidth product is appropriate for slow temperature, pressure, and chemical-sensor signals. Four amplifiers can be used for channel conditioning, buffering, gain stages, and active filtering. Because its 10 mV typical input offset voltage may dominate a precision measurement, include calibration or offset correction when the sensor output is small.
Recomendado
Portable Measurement Instruments
The TS944IN is suitable for handheld or portable measurement equipment that processes slow differential or single-ended signals. Its four amplifier channels can implement instrumentation-style input stages, voltage followers, active filters, and threshold comparators while operating from 2.5 V to 10 V. The low 1.2 uA typical supply current per channel supports battery-operated operation, and the 1 pA typical input bias current helps preserve high-impedance sensor outputs. Validate input offset and output settling against the required measurement accuracy before finalizing the signal chain.
Recomendado
Low-Frequency Active Filters
The TS944IN can implement active filters for low-frequency sensor and control signals because its 10 kHz gain-bandwidth product provides useful closed-loop bandwidth for modest gain settings. Its four independent channels support multi-stage filter realization, signal conditioning, and buffering without requiring four separate packages. Rail-to-rail output operation can improve output range in low-voltage systems, although engineers should check the common-mode and output-swing limits for the selected supply. The 4.5 mV/us typical slew rate must also be adequate for the expected signal and transient bandwidth.
Recomendado
Industrial Control Signal Conditioning
The TS944IN can be used in industrial control and monitoring circuits that operate from 2.5 V to 10 V and process relatively slow control signals. Its low-power operation suits distributed or maintenance-powered modules, while four channels allow shared conditioning of sensor, feedback, reference, or actuator-control nodes. The -40 C to +85 C operating range matches industrial equipment environments. Engineers should use appropriate input protection, verify grounding around sensitive analog signals, and confirm that the amplifier's offset and bandwidth meet the control-loop accuracy requirements.
Recomendado
Threshold Detection and Comparators
The TS944IN can compare a slowly changing input with a reference voltage for threshold detection, alarm generation, or simple event signaling. Its rail-to-rail output helps approach the available output range on low-voltage supplies, and the four-channel package provides multiple independent comparison functions. The 10 mV typical input offset voltage should be included in the threshold error budget, while the 10 kHz gain-bandwidth product is generally adequate for slow process variables. Add positive feedback or hysteresis when chatter around the switching threshold would be unacceptable.
Recomendado
Legacy Through-Hole Control Boards
The TS944IN is particularly relevant to maintenance of legacy through-hole control boards that already use a 14-DIP quad amplifier layout. Keeping the original package can avoid mechanical redesign and extensive PCB changes while preserving the established 2.5 V to 10 V control architecture. Its obsolete lifecycle status means engineers should also assess long-term availability and whether a redesign to a current amplifier is more reliable. For any replacement, compare the complete pinout and electrical characteristics rather than relying only on the four-amplifier and DIP description.
Recomendado
Dados de referência de engenharia para TS944IN — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | 14-DIP |
| Number of Amplifiers | 4 circuits |
| Amplifier Type | General-purpose |
| Output Type | Rail-to-rail |
| Supply Voltage Range | 2.5 V to 10 V |
| Gain-Bandwidth Product | 10 kHz |
| Slew Rate | 0.0045 V/us |
| Supply Current | 1.2 uA per amplifier |
| Input Bias Current | 1 pA typical |
| Input Offset Voltage | 10 mV typical |
| Operating Temperature Range | -40 C to +85 C |
Principais diferenciais
- Four low-power amplifiers in one through-hole package (vs Single-amplifier 14-DIP devices)
- Rail-to-rail output operation for low-voltage designs (vs Conventional non-rail-to-rail op amps)
- Very low typical input bias current (vs Higher-bias-current general-purpose op amps)
Notas de projeto
Do not treat another TS94x package variant as a drop-in replacement. The TS944ID is documented with a 14-SO package, while TS944IN uses a 14-DIP footprint. Before substituting, compare every amplifier-channel pin, supply pin, input common-mode range, output swing, offset voltage, input bias current, supply current, gain-bandwidth product, and slew rate. A PCB redesign and full electrical review are required when moving between the DIP and small-outline package options.
Place supply-decoupling capacitors close to the positive and negative supply pins, and connect each amplifier's ground reference to a low-impedance analog ground path. Keep sensitive input and feedback traces away from switching nodes and high-current return paths. Because the gain-bandwidth product is only 10 kHz, long feedback routes can increase parasitic coupling and reduce stability margin; use short, direct feedback components and verify the final board with appropriate loading and output capacitance.
Include the 10 mV typical input offset voltage when evaluating small-signal accuracy. Estimated input-referred error at a gain of 10 is approximately 100 mV when no calibration is applied, using the stated 10 mV typical offset and a gain of 10. This is an illustrative arithmetic estimate, not a guaranteed limit. For precision sensor signals, use calibration, offset trimming, or an amplifier with a lower specified offset while also checking bias current and noise requirements.
Informações de conformidade
The manufacturer datasheet refers to ECOPACK package options, but package-specific environmental declarations for TS944IN require confirmation from STMicroelectronics.
