MCP603-I/ST - 2.8MHz Low-Power R-R Op Amp | Microchip Technology
MPN： MCP603-I/ST ✓ 啟用中MCP603-I/ST 概覽
An operational amplifier, or op amp, is a high-gain differential amplifier used to amplify, buffer, filter, or compare analog signals. The MCP603 belongs to the CMOS operational amplifier family and ultimately to the broader analog signal-conditioning and semiconductor hierarchy. Its rail-to-rail output allows the output voltage to approach the positive and negative supply limits, while its low input bias current supports high-impedance sensor and measurement circuits.
The MCP603 combines a 2.8 MHz typical gain-bandwidth product with a 2.3 V/µs typical slew rate. Its low quiescent current makes it suitable for portable, battery-powered, and continuously powered equipment. Unity-gain stability supports direct voltage-following use, while the chip-select feature allows a system controller to place the amplifier in a low-power state when the signal path is not required.
Microchip describes the device as a single amplifier with chip select, low bias current, high-speed operation, high open-loop gain, and rail-to-rail output swing. These characteristics support general-purpose analog conditioning without the higher supply current and larger package requirements of some high-speed amplifiers. The 8-TSSOP format also supports compact PCB layouts, although the exposed package dimensions and lead pitch must be considered during assembly.
Typical uses include sensor-signal conditioning, low-frequency filtering, voltage buffering, current-to-voltage conversion, and precision control loops. The part is also suitable for portable instrumentation, industrial monitoring, battery-powered measurement systems, and embedded analog interfaces. Its 2.7 V minimum supply operation is particularly useful for systems powered from a single low-voltage rail.
Designers should account for the amplifier's 2.8 MHz bandwidth and 2.3 V/µs slew rate when setting gain-bandwidth and large-signal requirements. Input and output stability, capacitive-load behavior, chip-select logic levels, and decoupling must be evaluated against the manufacturer datasheet. PCB layout should keep the feedback path short and provide a low-impedance supply return to reduce noise and instability risk.
This product page consolidates the verified Microchip and distributor information, distinguishes true package-compatible alternatives from unavailable substitutes, and adds practical application and design guidance for engineers evaluating the MCP603-I/ST.
直接替換替代品，適用於 MCP603-I/ST — 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MCP603-I/ST 最大額定值與電氣特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 1 channel |
| Minimum Operating Supply Voltage | 2.7 V |
| Maximum Operating Supply Voltage | 5.5 V |
| Single-Supply Operation | Up to 6.0 V |
| Gain-Bandwidth Product | 2.8 MHz typical |
| Slew Rate | 2.3 V/µs typical |
| 靜態電流 | Less than 325 µA typical |
| Unity-Gain Stability | Yes |
| Output Swing | Rail-to-rail |
| Input Common-Mode Range | Includes ground |
| Shutdown Control | Chip select |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 8-TSSOP, 0.173 inch (4.40 mm) width |
| 安裝類型 | Surface mount |
| Packaging | Tube |
| AEC-Q100 Classification | AEC-Q100 indicated by verified distributor listing |
MCP603-I/ST 8-tssop, 0.173 inch (4.40 mm) width 腳位配置指南
MCP603-I/ST（8-tssop, 0.173 inch (4.40 mm) width 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： MCP603-I/ST.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP603-I/ST 適用於 6 應用s: Portable Sensor Signal Conditioning, Battery-Powered Measurement Systems, Industrial Process Monitoring, Low-Power Data Acquisition, Active Filtering and Signal Conditioning, Low-Voltage Control and Interface Circuits.
Portable Sensor Signal Conditioning
The MCP603-I/ST fits low-power sensor interfaces because it operates from 2.7 V to 5.5 V while drawing less than 325 µA typical quiescent current. Its low input bias current preserves the integrity of high-impedance sensor signals, and the rail-to-rail output provides more usable output range than a fixed-rail implementation on a 3.3 V supply. Designers can place the amplifier between a resistive bridge or resistive sensor and an ADC input. Chip select can disable the amplifier during inactive sampling intervals, although total current must also account for sensor and ADC leakage.
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Battery-Powered Measurement Systems
The MCP603-I/ST supports battery-powered measurement systems by combining a 2.7 V minimum supply with less than 325 µA typical quiescent current. At 5.5 V, the single amplifier can process common low-voltage sensor signals without a dual supply, while rail-to-rail output helps the system approach the available signal range. It is useful for handheld meters, environmental monitors, and portable diagnostic instruments. Chip select provides a controlled shutdown path, but battery-life calculations should include load current, leakage, and the duration for which the analog front end remains enabled.
推薦
Industrial Process Monitoring
The MCP603-I/ST is applicable to industrial process-monitoring circuits that operate from a regulated low-voltage rail and require dependable operation over -40°C to +85°C. Its 2.8 MHz typical gain-bandwidth product is suitable for low-frequency instrumentation signals, and the 2.3 V/µs typical slew rate supports faster small-signal transitions. The amplifier can buffer a conditioned transducer output or drive the input of a higher-resolution converter. Designers should still check noise, offset, common-mode range, and capacitive loading against the complete signal chain rather than relying on bandwidth alone.
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Low-Power Data Acquisition
The MCP603-I/ST can serve as the analog buffer immediately preceding a low-resolution or medium-resolution ADC in a compact data-acquisition system. Its rail-to-rail output gives the converter input a wider usable swing, while unity-gain stability permits straightforward voltage-following configuration. The amplifier’s low quiescent current is valuable in distributed or portable acquisition nodes that operate for long periods from limited power budgets. For higher-speed channels, engineers should compare the 2.8 MHz gain-bandwidth product and 2.3 V/µs slew rate against the required settling time and ADC acquisition window.
推薦
Active Filtering and Signal Conditioning
The MCP603-I/ST is well suited to active low-pass filtering and general signal-conditioning stages because it combines a 2.8 MHz typical gain-bandwidth product with a 2.3 V/µs typical slew rate. Its unity-gain stability supports inverting, non-inverting, and follower configurations when component selection remains within the recommended operating region. The low quiescent current benefits continuously powered monitoring systems, and chip select can reduce power when a filter is not being sampled. Component tolerances and the amplifier’s finite gain-bandwidth response determine the achievable filter accuracy.
推薦
Low-Voltage Control and Interface Circuits
The MCP603-I/ST can be used in low-voltage control loops, comparator interfaces, and analog output drivers where rail-to-rail output is valuable. Operating from 2.7 V allows deployment in 3.3 V control systems, while chip select lets a microcontroller or system controller reduce amplifier activity during inactive periods. Its high open-loop gain supports accurate closed-loop amplification, but stability with capacitive loads must be checked using the manufacturer guidance. The 8-TSSOP package supports compact layouts, although careful TSSOP routing and decoupling are needed to minimize noise and maintain reliable operation.
推薦
推薦產品摘要
工程參考資料，適用於 MCP603-I/ST — 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 |
|---|---|
| Brand | Microchip Technology |
| Package | 8-TSSOP (0.173 inch / 4.40 mm width) |
| Number of Channels | 1 channel |
| Minimum Supply Voltage | 2.7 V |
| Maximum Supply Voltage | 5.5 V |
| Gain-Bandwidth Product | 2.8 MHz typical |
| Slew Rate | 2.3 V/µs typical |
| Quiescent Current | Less than 325 µA typical |
| Output Swing | Rail-to-rail |
| Operating Temperature | -40°C to +85°C |
主要差異化特點
- Low-power operation with controllable shutdown (對比MCP603-I/SN)
- Compact 8-TSSOP implementation (對比MCP603-I/P)
- Single-supply rail-to-rail analog operation (對比MCP603T-I/ST)
設計說明
Place the manufacturer-recommended supply bypass capacitor immediately adjacent to the positive supply and ground pins. Route the ground connection into the ground plane with a short, low-impedance path rather than through an unprotected signal trace. Keep the resistor network, feedback capacitor, and amplifier pins in a compact group so that parasitic capacitance does not degrade the usable stability or transient response.
Do not assume that a rail-to-rail output amplifier can drive every capacitive load. The MCP603-I/ST has a 2.3 V/µs typical slew rate and a 2.8 MHz typical gain-bandwidth product, so excessive output capacitance or very high closed-loop gain can cause peaking or oscillation. Check the manufacturer capacitive-load guidance and isolate long cables with an appropriate resistor when driving ADC inputs, multiplexers, or remote modules.
Use the chip-select function to reduce system power when the amplified signal is not required, but confirm the control-logic thresholds and shutdown current in the manufacturer datasheet. At 2.7 V supply, verify that the selected digital control signal reaches a valid high or low level. Shutdown timing should also be coordinated with ADC sampling so the amplifier is enabled and settled before the conversion window.
Keep the MCP603-I/ST feedback path short and avoid routing it beneath or beside high-speed switching nodes. The 2.8 MHz typical gain-bandwidth product makes the device useful for low-frequency precision conditioning, but board-level coupling and ground return paths can still dominate noise performance. A solid ground plane, controlled switching-current paths, and separation from digital and power-converter nodes help preserve the low-power signal quality expected from the device.
合規資訊
A verified distributor listing describes MCP603-I/ST as automotive AEC-Q100, while the verified industrial-temperature suffix specifies -40°C to +85°C. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not present in the supplied data and are therefore recorded as unknown.
