MCP624-E/ST - 20MHz Quad mCal Op Amp | Microchip Technology
料号： MCP624-E/ST ✓ 量产中MCP624-E/ST 概述
An operational amplifier, or op amp, is a high-gain analog building block used to amplify, buffer, filter, compare, and drive signals. The MCP624 belongs to the CMOS operational-amplifier hierarchy, where rail-to-rail input and output operation supports signals approaching the supply rails. Four independent channels in one package can simplify sensor conditioning, signal conditioning, and general analog signal-chain designs while reducing board area.
The MCP624-E/ST provides a typical 20 MHz gain-bandwidth product, 10 V/us slew rate, 13 nV/Hz typical noise at 1 MHz, and a typical short-circuit current of 70 mA. Its calibrated input offset voltage is specified at a maximum of 200 uV. The -E suffix identifies the electrical grade, while the /ST package designation corresponds to the 14-pin TSSOP package described for this device.
Microchip mCal is an important architectural feature of the MCP62x family. At power-up, the amplifiers are self-calibrated to improve offset performance. This calibration makes the family useful where DC offset can influence measurement accuracy, transducer conditioning, or closed-loop control behavior. Designers should still account for output settling and startup time when sequencing sensitive analog systems.
Typical uses include 2.5 V and 5.5 V precision signal conditioning, low-voltage sensor interfaces, active filters, instrumentation buffers, audio preamplifier stages, and four-channel acquisition front ends. The 20 MHz bandwidth provides useful speed for low-amplitude signals, while the 14 TSSOP outline supports conventional surface-mount assembly.
PCB design should provide a solid return path, short feedback loops, and careful placement of input, output, and compensation-network components. Decoupling capacitors should be connected directly to the supply pins, and unused amplifier inputs must be biased so they do not float. The 5.5 V maximum operating supply also leaves no tolerance margin above that voltage.
This product page combines the manufacturer specifications with practical considerations for decoupling, layout, calibration behavior, signal conditioning, and drop-in sourcing. It also highlights the electrical and package constraints that must be checked before replacing the MCP624-E/ST in an existing 14-pin TSSOP design.
直接替换替代料： MCP624-E/ST ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MCP624-I/ST
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MCP624-E/ST 最大额定值与电气特性
| Amplifier Type | General Purpose |
| Number of Circuits | 4 circuits |
| Gain-Bandwidth Product | 20 MHz typical |
| Slew Rate | 10 V/us typical |
| Input Offset Voltage | ±200 uV maximum after calibration |
| Voltage Noise Density | 13 nV/Hz typical at 1 MHz |
| Short-Circuit Current | 70 mA typical |
| Input Type | Rail-to-Rail |
| 输出类型 | Rail-to-Rail |
| Maximum Supply Voltage | 5.5 V |
| 封装 | 14-pin TSSOP, 0.173 inch / 4.40 mm width |
| 安装类型 | Surface Mount |
| Packaging | Tube |
| Calibration | mCal power-up self-calibration |
MCP624-E/ST 引脚配置
| 引脚 1 | OUTA — Amplifier A output |
| 引脚 2 | -INA — Amplifier A inverting input |
| 引脚 3 | +INA — Amplifier A non-inverting input |
| 引脚 4 | V- — Negative supply |
| 引脚 5 | +INB — Amplifier B non-inverting input |
| 引脚 6 | -INB — Amplifier B inverting input |
| 引脚 7 | OUTB — Amplifier B output |
| 引脚 8 | OUTC — Amplifier C output |
| 引脚 9 | -INC — Amplifier C inverting input |
| 引脚 10 | +INC — Amplifier C non-inverting input |
| 引脚 11 | V+ — Positive supply |
| 引脚 12 | +IND — Amplifier D non-inverting input |
| 引脚 13 | -IND — Amplifier D inverting input |
| 引脚 14 | OUTD — Amplifier D output |
典型应用
MCP624-E/ST 适用于 6 应用s: Low-Voltage Sensor Signal Conditioning, Active Filtering and Frequency Shaping, Precision Instrumentation Buffering, Audio Preamplifier and Output Buffering, Four-Channel Data Acquisition Front End, Battery-Powered Portable Measurement.
Low-Voltage Sensor Signal Conditioning
The MCP624-E/ST fits sensor-conditioning stages that require four rail-to-rail amplifier channels within a compact 14-pin TSSOP outline. Its 20 MHz typical gain-bandwidth product allows the closed-loop bandwidth to be set according to the sensor and filter requirements, while the 10 V/us typical slew rate preserves useful response for small, rapidly changing signals. The calibrated input offset voltage of 200 uV maximum helps limit DC error in transducer interfaces. Use each channel for gain, impedance conversion, or active filtering, and keep the selected feedback network close to the relevant amplifier pins.
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Active Filtering and Frequency Shaping
The MCP624-E/ST is appropriate for active filters requiring a 20 MHz typical gain-bandwidth product and 10 V/us typical slew rate in a low-voltage circuit. Its four-channel configuration allows cascaded stages, multi-pole response, or parallel signal conditioning without requiring four separate packages. The 13 nV/Hz typical noise density at 1 MHz can be considered when designing low-amplitude filters, although resistor values and noise gain determine the total output-noise contribution. Keep sensitive summing nodes and feedback components compact, and verify stability and dynamic range against the selected closed-loop topology.
推荐
Precision Instrumentation Buffering
The MCP624-E/ST can provide high-impedance input buffering and gain stages for instrumentation signals because each channel supports rail-to-rail input and output operation. The 20 MHz typical gain-bandwidth product gives designers more bandwidth margin than a slow offset-focused amplifier, while the calibrated input offset voltage of 200 uV maximum supports low-level DC measurements. Buffering reduces source-loading effects and isolates the sensor from subsequent filter or converter stages. Select suitable precision resistors, keep input leakage and bias-current effects in mind, and confirm that the common-mode and output ranges cover the instrument's signal excursion.
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Audio Preamplifier and Output Buffering
The MCP624-E/ST is suitable for low-voltage audio preamplifier, mixer, and buffering stages where a 10 V/us typical slew rate is more useful than a micropower operating current. Rail-to-rail inputs and outputs support signal swings approaching the supply limits, and the 13 nV/Hz typical noise density at 1 MHz provides a useful basis for gain planning. Four channels allow stereo preamplification plus additional monitoring or filtering functions. Because audio performance also depends on output loading and loop gain, confirm stability with the selected feedback network and assess the output drive against the connected speaker or line-stage load.
推荐
Four-Channel Data Acquisition Front End
The MCP624-E/ST's four independent channels can consolidate the analog front end of a compact data-acquisition system. Each amplifier can condition a sensor channel before multiplexing or conversion, while the 20 MHz typical gain-bandwidth product handles higher-bandwidth waveforms and the 10 V/us typical slew rate limits large-signal distortion. The mCal power-up self-calibration can reduce offset errors in DC-sensitive measurements. For best channel consistency, use matched resistors, symmetrical routing, and identical input impedance networks, and verify acquisition settling time after the device's startup calibration.
推荐
Battery-Powered Portable Measurement
The MCP624-E/ST can serve low-voltage portable measurement circuits when its supply and bandwidth requirements align with the design. Rail-to-rail input and output behavior allows operation near the available supply range, while four channels support several sensor or control functions in one package. The 20 MHz typical gain-bandwidth product is useful for body-signal, environmental, or portable instrumentation nodes, although actual battery life depends on the complete circuit and operating duty cycle. Check the quiescent-current requirement in the manufacturer datasheet, disable unused channels according to the device guidance, and verify startup behavior after power restoration.
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推荐产品汇总
工程参考数据： MCP624-E/ST ——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 | MCP624-I/ST |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same package |
| Number of Amplifiers | 4 circuits | 4 circuits |
| Gain-Bandwidth Product | 20 MHz typical | 20 MHz family rating |
| Slew Rate | 10 V/us typical | 10 V/us family rating |
| Input Offset Voltage | ±200 uV maximum after calibration | ±200 uV maximum family rating |
| Voltage Noise Density | 13 nV/Hz typical at 1 MHz | 13 nV/Hz typical family rating |
| Input and Output | Rail-to-Rail | Rail-to-Rail |
| Calibration | mCal power-up self-calibration | mCal power-up self-calibration |
| Maximum Supply Voltage | 5.5 V | 5.5 V family rating |
| Electrical Grade | -E grade | -I grade |
| Short-Circuit Current | 70 mA typical | 70 mA typical family rating |
关键差异点
- Four calibrated channels in one package （对比 MCP624-I/ST)
- 20 MHz bandwidth with 10 V/us slew rate （对比 MCP624-I/ST)
- Rail-to-rail operation with mCal （对比 MCP624-I/ST)
设计说明
Place the positive and negative supply capacitors directly beside pins 11 and 4, respectively, and keep the ground return path short. The 14-TSSOP lead spacing limits routing space, so reserve short, direct paths for each feedback loop and avoid routing fast output traces beneath sensitive input pins. A solid ground plane reduces return-path discontinuity, while isolation from switching nodes helps preserve the benefit of the rail-to-rail input stage.
Keep each amplifier's inverting input and feedback components close together to minimize parasitic capacitance and feedback-loop area. The 20 MHz typical gain-bandwidth product is high enough that long PCB traces and excessive load capacitance can alter phase margin, especially at high noise gain. Use the manufacturer's recommended stability guidance, keep output loads within their limits, and test the complete board rather than relying only on ideal simulation results.
Do not permit the supply voltage to exceed the 5.5 V maximum rating, and do not assume rail-to-rail operation guarantees an exact 0 V or 5.5 V output under every load. Unused amplifier inputs should be tied to a valid common-mode voltage instead of being left floating. Also account for the mCal power-up interval when sequencing measurements, because the system should not assume the final offset performance is present immediately at power application.
合规信息
No explicit environmental, automotive, or material-compliance declarations were identified for the exact MCP624-E/ST order code. Confirm the current declarations and product status with the manufacturer before production release.
