OPA241PA - 5V Micropower Rail-to-Rail Op Amp | Texas Instruments
料号： OPA241PA ✓ 量产中OPA241PA 概述
An operational amplifier, or op amp, is an analog integrated circuit that amplifies the voltage difference between its two inputs while using negative feedback to set a stable closed-loop gain. The OPA241 belongs to the operational-amplifier hierarchy within analog ICs and signal-conditioning systems. Its single-supply, rail-to-rail output architecture is particularly useful when the signal must be processed close to the available supply rails in low-voltage portable equipment.
Key features include approximately 25 µA quiescent current, low offset voltage, rail-to-rail output swing, high common-mode rejection ratio, and high open-loop gain. The manufacturer describes the OPAx241 series as being optimized for low-power operation and designed specifically for battery-powered, portable applications. Rail-to-rail output swing helps maximize usable signal range in 5 V systems, while low quiescent current reduces the continuous load imposed on a battery or energy-harvesting source.
OPA241PA is the single-amplifier version in the OPAx241 family. Related OPA2241 and OPA4241 devices provide dual and quad channels, respectively, while the OPA251 family is optimized for ±15 V supplies. The OPA241PA is packaged for through-hole PCB installation in an 8-pin PDIP package. Its electrical behavior should be evaluated against the complete signal chain, including input bias current, common-mode range, output swing limits, slew rate, noise, and stability with the selected feedback network.
Typical applications include low-power sensor conditioning, portable battery monitoring, current sensing, medical monitoring, industrial instrumentation, and low-voltage analog signal processing. The amplifier can buffer weak sensor outputs, amplify small differential signals, or serve as the active element in filters and transimpedance circuits. Designers should use the manufacturer datasheet when selecting external resistors, capacitors, and compensation values.
A key design consideration is power headroom. Because the OPA241PA is optimized for a 5 V single supply, verify the input, output, and common-mode voltage limits for the exact production variant and operating temperature. Place bypass capacitance close to the supply pins, keep sensitive input routing short, and confirm stability with the intended gain and load. This page combines the device specifications, sourcing information, application guidance, and replacement considerations into a practical engineering reference.
直接替换替代料： OPA241PA ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料OPA241PA 最大额定值与电气特性
| Product Type | Single operational amplifier |
| Supply Configuration | Single-supply |
| Nominal Supply Voltage | 5 V |
| 静态电流 | Approximately 25 µA |
| Output Swing | Rail-to-rail |
| Gain-Bandwidth Product | 35 MHz |
| Number of Channels | 1 |
| 封装 | 8-pin PDIP |
| 安装类型 | Through-hole |
| Application | Battery-powered and portable applications |
OPA241PA 8-pin pdip 引脚配置指南
OPA241PA（8-pin pdip 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： OPA241PA.
请参阅 数据手册 以查看完整引脚配置。
典型应用
OPA241PA 适用于 6 应用s: Portable Sensor Signal Conditioning, Battery-Powered Voltage Monitoring, Low-Power Current Sensing, Portable Medical Monitoring, Industrial Low-Power Instrumentation, Low-Noise Analog Buffering.
Portable Sensor Signal Conditioning
OPA241PA fits low-voltage sensor interfaces where every microamp of amplifier bias current can affect battery life. Its approximately 25 µA quiescent current, low input offset voltage, and high common-mode rejection help preserve weak sensor signals while the rail-to-rail output swing maximizes the usable range of a 5 V supply. Place the amplifier close to the sensor or connector, use short input traces, and select feedback resistors that do not load the sensor output. Confirm the exact input common-mode range, bias-current behavior, and output swing limits in the manufacturer datasheet before defining the gain.
推荐
Battery-Powered Voltage Monitoring
OPA241PA is appropriate for buffering and scaling battery or power-supply voltages in portable monitors. Its 5 V single-supply orientation and rail-to-rail output swing support measurements that occupy much of the available signal range, while approximately 25 µA quiescent current limits continuous overhead. The amplifier can drive the input of a low-power ADC or comparator after suitable scaling. Design the divider so it does not consume more current than the measurement accuracy requires, and verify the source impedance against the amplifier’s bias-current and noise specifications.
推荐
Low-Power Current Sensing
OPA241PA can amplify the small voltage generated across a low-value shunt resistor in a portable current monitor. Low offset voltage helps reduce measurement error near zero current, and the approximately 25 µA quiescent current is valuable when the monitored system operates from a constrained energy source. Choose a shunt resistance that produces an output within the amplifier’s common-mode and output limits, keep the Kelvin connection short, and avoid long parallel copper paths. Confirm offset, bias current, and drift in the manufacturer datasheet for the required temperature range.
推荐
Portable Medical Monitoring
OPA241PA can serve as a low-power analog front-end element in compact medical monitoring equipment when its specified electrical characteristics satisfy the signal-chain requirements. Low power supports longer battery operation, while low offset and high common-mode rejection are useful for small physiological or diagnostic signals. A medical design must also evaluate patient protection, isolation, leakage, noise, and applicable regulatory requirements; qualification of this amplifier alone does not establish system compliance. Use the manufacturer datasheet to establish input ranges and noise performance before selecting external protection components.
推荐
Industrial Low-Power Instrumentation
OPA241PA is useful in low-energy industrial instrumentation when the signal bandwidth does not exceed the amplifier’s capabilities and the system runs from a 5 V rail. Its approximately 25 µA quiescent current helps maintain long unattended operation, while the 8-pin PDIP package supports through-hole prototyping and repair. Use isolation or protection ahead of the amplifier when the source includes hazardous transients or large common-mode excursions. Validate noise, offset, output drive, and common-mode limits at the actual signal level and temperature.
推荐
Low-Noise Analog Buffering
OPA241PA can buffer high-impedance analog nodes where low bias current and reduced supply consumption are more important than the very low noise of a dedicated precision amplifier. The listed 35 MHz gain-bandwidth product provides useful bandwidth for many low-frequency instrumentation and control paths, while rail-to-rail output swing improves signal utilization at 5 V. Choose unity-gain or low-gain operation when the source impedance is high, verify that the amplifier remains stable with the intended capacitive load, and use short, shielded routing where interference is significant.
推荐
推荐产品汇总
工程参考数据： OPA241PA ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 8-pin PDIP |
| Brand | Texas Instruments |
| Number of Channels | 1 |
| Supply Configuration | Single-supply |
| Nominal Supply Voltage | 5 V |
| Quiescent Current | Approximately 25 µA |
| Gain-Bandwidth Product | 35 MHz |
| Output Swing | Rail-to-rail |
| Primary Application | Battery-powered and portable applications |
| Mounting Type | Through-hole |
关键差异点
- Low-power 5 V operation for portable systems （对比 OPA132UA)
- Rail-to-rail output maximizes 5 V signal range （对比 OPA132UA)
- Through-hole package supports prototype and repair workflows （对比 OPA132UA)
设计说明
Treat the approximately 25 µA quiescent current as the amplifier’s continuous supply overhead, but calculate total current from both the supply rail and any input or feedback-network currents. For a battery design, include sensor current, ADC activity, regulator quiescent current, and leakage paths. Use the lowest stable closed-loop gain and avoid unnecessary bias resistors because they can dominate the power budget when operating from a low-current source.
Place the supply bypass capacitor immediately adjacent to the positive and ground pins, with the shortest possible return path to the device ground. Route high-impedance input nets away from the supply, clock, and switching-node traces. For an 8-pin PDIP implementation, follow the manufacturer land pattern and verify pin numbering against the physical package marking before drilling or soldering.
Do not assume rail-to-rail output also means rail-to-rail input. Confirm the common-mode input range and output swing separately at the intended supply voltage and load. Also avoid treating a cross-reference result as proof of replacement: the package, pin functions, supply limits, quiescent current, offset, bandwidth, stability, and noise should all be checked against the OPA241PA manufacturer datasheet before redesigning the board.
For high-impedance sources, keep the input route short and avoid leakage from board contamination, flux residue, or adjacent high-impedance nodes. Select feedback resistors low enough to limit input bias-current error while retaining the low-power objective. If the circuit drives a significant capacitive load or operates at a high closed-loop gain, verify stability using the manufacturer’s recommended compensation and load conditions.
合规信息
No explicit compliance statements for OPA241PA appear in the manufacturer or distributor excerpts. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status using the manufacturer product page or authoritative compliance documentation.