MC33502P - 1-7V Dual Rail-to-Rail Op Amp | onsemi
MPN： MC33502P ✓ 啟用中MC33502P 概覽
An operational amplifier is an analog signal-conditioning component that uses differential input voltage to control an amplified output voltage. The dual-amplifier configuration provides two independent amplifiers in one package, reducing component count on boards that require two gain stages, buffers, comparators, or active-filter channels. In the MC33502P, rail-to-rail inputs help preserve signal range in single-supply systems, while the rail-to-rail output improves the available output swing.
The principal features of the MC33502P are its 1 V to 7 V supply range, dual-circuit configuration, rail-to-rail input and output operation, and output capability within 50 mV of the rails. The 8-pin PDIP package supports conventional through-hole PCB assembly and is useful for prototypes, educational designs, and legacy equipment. Its dual topology also allows the two channels to operate in inverting, non-inverting, buffer, comparator, and filter configurations, subject to the operating limits in the manufacturer datasheet.
At low supply voltages, amplifier headroom becomes a central design constraint. The MC33502P is intended for circuits operating from 1 V to 7 V, allowing it to serve portable sensors, low-voltage analog interfaces, battery-powered instruments, and mixed-signal embedded systems. Because a rail-to-rail output still does not reach the ideal supply rails, designers should account for the stated 50 mV output-swing limit when defining logic thresholds or low-amplitude signal ranges.
Typical applications include low-voltage sensor conditioning, active filtering, microphone or audio preamplification, transducers with limited supply voltage, and general-purpose dual-stage amplification. The device can also implement two independent buffer channels where low quiescent consumption and compact through-hole assembly are useful. For new high-density products, the older PDIP format should be weighed against newer surface-mount dual op amps that can offer lower board area and automated assembly.
When designing around the MC33502P, begin by checking the required input common-mode range, output load, gain-bandwidth behavior, slew rate, noise, and stability for the selected configuration. Keep feedback resistors and compensation components close to their associated pins, provide adequate input and output decoupling, and avoid driving capacitive loads without stability analysis. Review the manufacturer datasheet for the exact dual-pinout, electrical limits, and recommended operating conditions before releasing a production schematic.
直接替換替代品，適用於 MC33502P — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品MC33502P 最大額定值與電氣特性
| Product Type | Dual operational amplifier |
| Amplifier Circuit Count | 2 circuits |
| Supply Voltage Range | 1 V to 7 V |
| Minimum Supply Voltage | 1 V |
| Maximum Supply Voltage | 7 V |
| Input Common-Mode Operation | Rail-to-rail |
| Output Swing | Rail-to-rail, within 50 mV of each rail |
| 封裝 | 8-PDIP |
| Package Pitch | 7.62 mm |
| Package Width | 0.300 in |
| 安裝方式 | Through-hole |
| 腳位數 | 8 pins |
MC33502P 0.300 in 腳位配置指南
MC33502P（0.300 in 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MC33502P.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC33502P 適用於 6 應用s: Low-Voltage Sensor Conditioning, Portable Audio Preamplification, Active Analog Filters, Battery-Powered Instrumentation, Transducer Signal Conditioning, Comparator and Threshold Circuits.
Low-Voltage Sensor Conditioning
The MC33502P is well suited to conditioning low-voltage sensor signals because its two amplifiers operate from 1 V to 7 V and provide rail-to-rail input capability. One channel can amplify a sensor output while the other provides buffering or active filtering before conversion. This lets designers retain more of the sensor’s available signal range than a conventional amplifier limited to the supply rails. The output swing within 50 mV of each rail should be included when defining the usable input and logic thresholds. Designers should also check the selected sensor’s source impedance and the amplifier’s offset, noise, bias-current, and bandwidth requirements against the target measurement precision.
Portable Audio Preamplification
A portable audio input can use one MC33502P channel for low-level voltage gain and the second channel for input or output buffering. Operation from 1 V to 7 V accommodates low-energy systems, while rail-to-rail inputs help the circuit accept microphone or line-level signals close to the supply limits. Near-rail output swing can improve utilization of the available signal range, although the specified 50 mV limitation must be included in headroom calculations. Confirm the amplifier’s noise, gain-bandwidth product, slew rate, and maximum output swing at the intended frequency before selecting resistor values or driving a speaker, headphone, or downstream converter.
Active Analog Filters
The two channels in the MC33502P can implement a second-order active filter section when each stage performs a defined gain and filtering function. Its 1 V to 7 V operating range supports compact, low-voltage analog conditioning blocks, and rail-to-rail inputs help retain signals located near the supply boundaries. The PDIP footprint also makes prototype changes and measurement straightforward. Filter design must account for the amplifier’s actual gain-bandwidth product, noise, slew rate, output-load capability, and stability behavior rather than relying only on ideal component values. Verify each stage’s gain and phase response with the final source and load impedances.
Battery-Powered Instrumentation
The MC33502P can amplify and buffer signals in battery-powered instruments where supply voltage is limited and board area is less important than simple through-hole assembly. The 1 V minimum supply permits operation from a single low-voltage source, while the dual configuration can reduce the number of amplifier packages. Rail-to-rail inputs and outputs improve utilization of the available supply range, making the device useful for sensor and transducer interfaces. For a battery design, confirm quiescent current, input bias current, noise performance, and the allowable temperature range. The component’s dissipation and the system’s common-mode and grounding strategy must also be checked before release.
Transducer Signal Conditioning
The MC33502P can serve as a dual gain stage for bridge, resistive, or other transducer interfaces when the operating voltage remains within 1 V to 7 V. Rail-to-rail inputs help preserve small signals positioned close to either supply rail, and the near-rail output can feed an ADC front end efficiently. One channel may provide amplification while the other acts as a unity-gain driver for the ADC input. The exact suitability depends on source impedance, signal bandwidth, input offset, noise, and common-mode behavior. Include the sensor output range, ADC input range, and factory calibration requirements in the design, then confirm the combined amplifier and ADC settling performance.
Comparator and Threshold Circuits
Although primarily an operational amplifier, the MC33502P can implement comparator-style threshold functions when its output behavior and response speed are suitable for the application. Rail-to-rail inputs allow a reference or signal near the supply limits to be evaluated, and the output can approach either rail with the documented 50 mV limit accounted for in logic design. A practical design should include suitable hysteresis or positive feedback to prevent chatter near the threshold. Verify propagation behavior, input offset, output saturation, and noise because an amplifier’s small-signal response does not automatically guarantee ideal comparator performance. The dual package can provide two independent threshold channels when both have adequate loading and noise margin.
工程參考資料，適用於 MC33502P — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 8-PDIP |
| Brand | onsemi |
| Amplifier Circuit Count | 2 circuits |
| Supply Voltage Range | 1 V to 7 V |
| — | Rail-to-rail |
| Output Swing | Within 50 mV of each rail |
| Mounting Style | Through-hole |
| Number of Pins | 8 pins |
設計說明
Place the supply-bypass capacitor directly between the positive-supply and ground pins, with short, low-inductance connections. Route the two amplifier outputs away from sensitive input and feedback nodes, and keep each channel’s feedback components close to the corresponding pins. The 8-pin PDIP footprint offers generous routing space, but lead proximity can still create coupling between channels if output and input traces run in parallel for long distances.
Do not assume that rail-to-rail input operation guarantees exact ground or supply-level input acceptance in every configuration. Review the common-mode limits, output-swing conditions, and offset behavior in the manufacturer datasheet. Also avoid treating the stated 50 mV output limit as a hard guarantee for every load; the permitted swing depends on load current, supply voltage, and output stage conditions.
Check whether each channel requires offset nulling before laying out the board. If offset-null access is needed, preserve the manufacturer’s recommended resistor and capacitor arrangement and avoid long exposed nodes around the null pins. For designs using one channel only, follow the datasheet guidance for the unused amplifier so that it does not introduce unnecessary oscillation or unstable behavior.
合規資訊
No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations were identified for this exact MPN.
