MCP603-I/SN - 2.8MHz CMOS Rail-to-Rail Op Amp | Microchip
MPN： MCP603-I/SN ✓ 啟用中MCP603-I/SN 概覽
An operational amplifier is an active analog semiconductor that amplifies the difference between its inverting and non-inverting inputs. The MCP603 belongs to the CMOS operational-amplifier family, which combines low power consumption with wide input and output voltage capability. It is intended for general-purpose signal conditioning where a single amplifier, rail-to-rail output swing, and low supply current are more useful than bipolar input bias characteristics.
The 2.8 MHz gain-bandwidth product supports moderate-bandwidth gain and filtering stages, while the 2.3 V/µs slew rate allows relatively fast signal transitions. Rail-to-rail output operation is valuable when the usable output range must approach the supply rails, especially in low-voltage systems where conventional bipolar amplifiers can lose output swing near either rail. The chip-select input allows a system designer to place the amplifier in a low-power shutdown state when it is not required.
Because the MCP603 operates from 2.7 V to 6.0 V, it fits battery-powered instrumentation, sensor interfaces, mixed-signal embedded systems, and low-voltage analog front ends. Its 8-pin SOIC package supports conventional surface-mount assembly, and the operating temperature range indicated by the “I” grade suffix is suitable for industrial-temperature designs. Circuit designers should still account for input common-mode range, output swing, stability, noise, and the chip-select logic level when assigning the device.
Typical uses include current-to-voltage conversion for sensors, active filtering, buffer stages for slow analog signals, and low-power acquisition systems. The MCP603-I/SN is also appropriate when the system needs a rail-to-rail output but does not require the very low input bias current or higher bandwidth of more specialized rail-to-rail amplifier families.
Design with the manufacturer pin configuration and typical-application circuit in mind. Keep the bypass capacitor close to the supply pin, use a stable feedback network for closed-loop operation, and check that signal amplitudes remain within the input common-mode range. Decoupling, grounding, and chip-select timing should be verified in the final board layout because package placement and return-current paths can affect analog performance.
This product reference combines manufacturer device information, distributor availability records, package details, and practical guidance for selecting, comparing, and implementing the MCP603-I/SN. It is intended to help engineers identify whether its voltage range, bandwidth, slew rate, package, and power characteristics fit a particular analog design before layout and prototype verification.
直接替換替代品，適用於 MCP603-I/SN — 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。
此系列的變體
與下列產品可直接替換的同系列型號： MCP603-I/SN （相同外形與佔位） — 差異在於 Amplifier Type, Gain-Bandwidth Product, Package, Quiescent Current, Slew Rate.
MCP603T-I/SN
✅ 直接替換📋 參考替代品（不在目錄中）
MCP603T-I/ST
✅ 直接替換📋 參考替代品（不在目錄中）
MCP603-I/ST
✅ 直接替換聯絡詢價
查看資料表 →MCP608-I/SN
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MCP603-I/SN 最大額定值與電氣特性
| Amplifier Type | Single general-purpose operational amplifier |
| Number of Circuits | 1 circuit |
| Technology | CMOS |
| Minimum Operating Supply Voltage | 2.7 V |
| Maximum Operating Supply Voltage | 6.0 V |
| Gain-Bandwidth Product | 2.8 MHz |
| Slew Rate | 2.3 V/µs |
| 靜態電流 | <325 µA |
| Output Swing | Rail-to-rail |
| Bias Current | Low bias current |
| Open-Loop Gain | High open-loop gain |
| Chip Select | Yes |
| 封裝 | 8-pin SOIC |
| Package Width | 3.90 mm |
| 安裝類型 | Surface mount |
| Temperature Grade | Industrial temperature grade |
MCP603-I/SN 腳位配置
| 腳位 1 | NC — Not connected |
| 腳位 2 | V- — Negative supply connection |
| 腳位 3 | +IN — Non-inverting input |
| 腳位 4 | -IN — Inverting input |
| 腳位 5 | CS — Chip-select input |
| 腳位 6 | OUT — Analog output |
| 腳位 7 | V+ — Positive supply connection |
| 腳位 8 | NC — Not connected |
典型應用
MCP603-I/SN 適用於 6 應用s: Low-Voltage Sensor Signal Conditioning, Battery-Powered Instrument Front End, Active Filtering and Gain Stage, Mixed-Signal Sensor Acquisition, Low-Voltage Output Buffer, Precision Analog Signal Conditioning.
Low-Voltage Sensor Signal Conditioning
The MCP603-I/SN fits sensor front ends that operate from a 2.7 V to 6.0 V rail and need a compact amplification stage. Its 2.8 MHz gain-bandwidth product is suitable for moderate-bandwidth conditioning, while the 2.3 V/µs slew rate supports faster transitions than a basic low-speed precision amplifier. Rail-to-rail output swing helps retain usable range near the supply limits in battery-powered equipment. A practical circuit places the sensor into the non-inverting or inverting input, adds feedback resistors for the required gain, and includes local supply bypass. The designer should verify input common-mode range, sensor output level, sensor impedance, and amplifier noise before selecting the gain.
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Battery-Powered Instrument Front End
The MCP603-I/SN is appropriate for portable measurement systems because it accepts supplies from 2.7 V to 6.0 V and consumes less than 325 µA quiescent current according to Microchip's manufacturer page. A single amplifier can buffer a source, provide gain, or form an active-filter stage without requiring a dual amplifier. Rail-to-rail output swing helps maximize the measurable range of a low-voltage converter or battery-derived rail. Chip select can disable the amplifier during idle intervals to reduce consumption further. For a practical implementation, use a short ground return, place bypass capacitance near the supply pins, and verify that shutdown timing does not create an output transient at the connected ADC or sensor.
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Active Filtering and Gain Stage
The MCP603-I/SN can serve as the active element in a moderate-bandwidth filter or closed-loop gain stage. Its 2.8 MHz gain-bandwidth product is the principal limit when a circuit requires high closed-loop gain, because bandwidth decreases as noise gain increases. The 2.3 V/µs slew rate is also important when the filter must preserve the edges of a fast waveform rather than only a low-frequency signal. Designers can implement a non-inverting amplifier, inverting amplifier, or first-order active filter while retaining low quiescent current. Component tolerances and amplifier noise directly affect filter accuracy, so simulation and prototype measurements should use the same R and C network planned for production.
推薦
Mixed-Signal Sensor Acquisition
The MCP603-I/SN fits mixed-signal acquisition circuits that need analog amplification close to a sensor before conversion. The device's 2.7 V minimum supply supports operation from a regulated 3.0 V or 3.3 V system rail, and its rail-to-rail output is beneficial when the converter accepts nearly the full input range. The single-amplifier configuration saves board area in compact sensor nodes. A useful topology amplifies the sensor differentially with a second channel or uses the MCP603 in a single-ended stage where the source is referenced appropriately. Validate the signal common-mode range at startup, add anti-alias filtering ahead of the ADC, and account for the 2.8 MHz bandwidth limit when choosing amplifier gain.
推薦
Low-Voltage Output Buffer
The MCP603-I/SN can buffer a low-voltage analog source into a downstream load when rail-to-rail output swing is important. Rail-to-rail output operation helps avoid the reduced headroom associated with conventional output stages, while the 325 µA maximum quiescent current supports low-power designs. The 2.8 MHz gain-bandwidth product is sufficient for many sensor, divider, and signal-conditioning buffers, but it does not qualify the device as a high-speed video buffer. Configure the circuit for unity gain unless the application needs a higher gain, keep feedback traces short, and confirm that the source and load do not demand output-current or capacitive-drive capability beyond the device's published limits.
推薦
Precision Analog Signal Conditioning
The MCP603-I/SN can condition precision analog signals when the design prioritizes CMOS low bias current and a compact general-purpose implementation. The manufacturer describes low bias current and high open-loop gain as key characteristics, while the 2.8 MHz bandwidth provides useful closed-loop capability for slow precision-oriented stages. This makes the device relevant to instrumentation, reference buffering, and low-level sensor paths that do not require the ultra-low offset and noise of dedicated precision amplifiers. Use the manufacturer bias-current and offset specifications when calculating source-induced error. A practical layout should keep the input network close to the pins, use a single ground reference for analog return paths, and avoid routing switching-current loops beneath the amplifier.
推薦
推薦產品摘要
工程參考資料，適用於 MCP603-I/SN — 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 | MCP603T-I/SN | MCP603T-I/ST | MCP603-I/ST | MCP608-I/SN |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin TSSOP | 8-pin TSSOP | 8-pin SOIC |
| Number of Amplifiers | 1 | 1 | 1 | 1 | 1 |
| Technology | CMOS | CMOS | CMOS | CMOS | CMOS |
主要差異化特點
- Combines rail-to-rail output with low-power CMOS operation (對比MCP603-I/ST)
- Low quiescent current for portable analog conditioning (對比MCP608-I/SN)
- Single amplifier with chip-select control in an 8-pin SOIC (對比MCP603T-I/SN)
設計說明
Place a local supply bypass capacitor at the V+ and V- pins and connect it to a low-impedance ground return. Keep the supply within the published 2.7 V to 6.0 V range. Use the chip-select function during idle periods when the downstream circuit can tolerate shutdown, but verify its active state and timing against the manufacturer logic-level specifications.
Route the inverting input, feedback components, and output as a compact analog loop. Keep digital control traces and chip-select switching away from the sensitive input node. A solid analog ground plane, short return paths, and careful separation from switching regulators reduce coupling that could disturb the 2.8 MHz bandwidth signal path.
Rail-to-rail output does not imply unlimited input common-mode range. Check both input and output limits against the actual signal amplitude at startup and across temperature. Also account for the effect of noise gain on closed-loop bandwidth; a high-gain configuration will not retain the full 2.8 MHz gain-bandwidth product.
For filter and gain applications, calculate the closed-loop bandwidth from the 2.8 MHz gain-bandwidth product and verify large-signal behavior against the 2.3 V/µs slew rate. Use stable feedback values and prototype the final resistor and capacitor network, including source impedance and load capacitance, before releasing the PCB.
合規資訊
The identified industrial-temperature suffix does not by itself establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain the current manufacturer product or packaging declarations for compliance.