MCP6021-E/P - 10MHz RRIO CMOS Op Amp, 1mA | Microchip
MPN： MCP6021-E/P ✓ 啟用中MCP6021-E/P 概覽
An operational amplifier (op amp) is the core active building block of analog and mixed-signal design. It belongs to the amplifier IC hierarchy, sitting below instrumentation amplifiers and above the discrete transistor level, and is used wherever a signal must be amplified, buffered, filtered, or compared against a reference. The MCP6021-E/P is a general-purpose, single-amplifier device, meaning one amplifier per package, and it is the entry point of Microchip's rail-to-rail 10 MHz CMOS family.
Key differentiating specifications include a 10 MHz typical gain-bandwidth product, a 7 V/us slew rate, and an input noise density of 8.7 nV/sqrt(Hz) at 10 kHz. Because the output swings rail-to-rail, the device can drive ADC and DAC reference pins, logic-level comparators, and capacitive loads at the extremes of the supply without saturating. The extended-temperature grade keeps the maximum input offset voltage at +/-250 uV, roughly half the +/-500 uV limit of the industrial-grade counterpart, which makes the -E suffix the right choice for precision DC signal chains running from -40 C to +125 C.
Technically, the MCP6021 is built on Microchip's advanced CMOS process, which delivers low input bias current, high open-loop gain, and low supply current while still supporting 10 MHz closed-loop operation. Because CMOS inputs present very high impedance, the device sources negligible loading on the preceding stage and pairs naturally with resistive-divider sensor front ends and high-impedance buffers. A single 1.0 uF bypass capacitor on the supply pin is normally sufficient for stable operation at these modest frequencies.
Typical applications include low-cost current-sense and voltage-sense amplifier front ends, sensor signal conditioning for thermistors, strain gauges and photodiode amplifiers, active low-pass filters in audio and telemetry chains, and rail-to-rail logic-level comparators for battery-powered monitoring equipment.
When designing around this part, note that the small-signal bandwidth is 10 MHz while the full-power bandwidth is set by the 7 V/us slew rate; for large-signal, high-amplitude stages a wider-bandwidth amplifier may be preferable. The PDIP package also gives a generous thermal path for prototyping and low-volume builds where an SOT-23-5 or SOIC-8 variant would be mechanically inconvenient.
This page consolidates distributor pricing, verified electrical characteristics, drop-in pin-compatible alternatives, and practical layout notes that are not gathered together in the original manufacturer datasheet, giving engineers a single decision-ready reference for the MCP6021-E/P.
直接替換替代品，適用於 MCP6021-E/P — 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： MCP6021-E/P （相同外形與佔位） — 差異在於 Amplifier Type, Input Noise Density, Mounting Type, Number of Circuits, Package.
MCP6021-I/P
✅ 直接替換聯絡詢價
查看資料表 →MCP6021R-E/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP6101-E/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP6001-E/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
OP42FZ
✅ 直接替換📋 參考替代品（不在目錄中）
MCP6021-E/P 最大額定值與電氣特性
| Number of Circuits | 1 |
| Amplifier Type | General Purpose, Rail-to-Rail Input/Output |
| Gain Bandwidth Product | 10 MHz (typical) |
| 供應電流 | 1.0 mA (typical) |
| 工作電源電壓 | 2.5 V to 5.5 V |
| Input Offset Voltage | Less than 0.5 mV |
| Offset Voltage (Extended Grade) | +/-250 uV (maximum) |
| Offset Voltage (Industrial Grade) | +/-500 uV (maximum) |
| Slew Rate | 7 V/us |
| Input Noise Density | 8.7 nV/sqrt(Hz) at 10 kHz (typical) |
| 工作溫度範圍 | -40 C to +125 C (extended temperature grade) |
| 封裝 | 8-PDIP (0.300 in, 7.62 mm) |
| 安裝類型 | Through Hole |
| Packaging Type | Tube |
| Technology | CMOS |
| RoHS 狀態 | unknown |
| AEC-Q100 Qualification | not_applicable |
MCP6021-E/P 腳位配置
| 腳位 1 | NC — Not connected (per datasheet) |
| 腳位 2 | -IN — Inverting input |
| 腳位 3 | +IN — Non-inverting input |
| 腳位 4 | V- — Negative supply (ground for single-supply operation) |
| 腳位 5 | NC — Not connected (per datasheet) |
| 腳位 6 | OUT — Amplifier output |
| 腳位 7 | V+ — Positive supply (2.5 V to 5.5 V) |
| 腳位 8 | NC — Not connected (per datasheet) |
典型應用
MCP6021-E/P 適用於 6 應用s: Low-Cost Current-Sense Amplifier, Thermistor and RTD Sensor Front End, Active Audio and Telemetry Filter, Battery-Powered Sensor Node, Rail-to-Rail Logic Comparator, Buffer Stage for High-Impedance Sources.
Low-Cost Current-Sense Amplifier
The MCP6021-E/P suits current-sense amplification because its less than 0.5 mV input offset (250 uV max in the extended grade) keeps DC error small relative to the few millivolts produced by a 10 mOhm shunt, while the 10 MHz gain-bandwidth product keeps loop phase margin healthy at gain of 20 to 50. The 1.0 mA typical supply current is negligible next to the shunt dissipation, and the 2.5 V to 5.5 V single-supply range suits 3.3 V and 5 V rails directly. Place the amplifier in a Kelvin connection to the shunt pads, keep the input traces short and paired, and note the 7 V/us slew rate limits how fast the sense signal can change before distortion appears.
推薦
Thermistor and RTD Sensor Front End
For resistive sensor excitation the MCP6021-E/P is a natural fit because CMOS input bias current in the picoamp range avoids corrupting the divider, and its 8.7 nV/sqrt(Hz) input noise at 10 kHz keeps the noise floor well below typical thermistor self-heating noise. The rail-to-rail input accepts the full 0 V to VDD divider swing without headroom concerns, and the rail-to-rail output can drive the ADC input directly with only a small anti-alias capacitor. A 1.0 uF bypass capacitor at pin 7 and a 100 nF at pin 4 is normally sufficient for stability at these frequencies.
推薦
Active Audio and Telemetry Filter
The MCP6021-E/P works well in low-frequency active filter stages such as anti-alias or anti-noise filters in audio and telemetry paths, where its 8.7 nV/sqrt(Hz) input noise and 1.0 mA quiescent current keep the amplifier contribution small relative to a 16-bit converter. With 10 MHz of gain-bandwidth, a 10 kHz second-order Sallen-Key stage at a gain of 10 still retains more than 60 degrees of phase margin, and the single supply of 2.5 V to 5.5 V lets the filter run directly from a sensor node without a negative rail. Use 1 percent film resistors to keep the cutoff accurate.
推薦
Battery-Powered Sensor Node
In a battery-operated environmental or IoT sensor node the MCP6021-E/P draws only 1.0 mA typical, and the whole amplifier consumes on the order of 5 mW at 5 V, which directly extends standby life in designs that duty-cycle their radio. The rail-to-rail input and output swing maximizes usable dynamic range from a single 3.3 V cell without headroom loss, and the extended-temperature grade covers environments from -40 C to +125 C. The 8-pin PDIP package makes hand-soldering and prototype rework straightforward on low-volume builds, while the SOT-23-5 variant of the same family is preferred in the final miniaturized assembly.
推薦
Rail-to-Rail Logic Comparator
The MCP6021-E/P can be used as a rail-to-rail comparator in threshold detection and over-voltage protection circuits, where the 10 MHz bandwidth gives very low propagation delay compared with older bipolar comparators and the 1.0 mA supply draw suits always-on protection. Because both input and output swing rail-to-rail, the sensing thresholds can be placed anywhere between the supply rails without sacrificing range, and the extended-grade +/-250 uV offset limit keeps the trip point stable over temperature. Keep in mind it is not a true comparator: use a dedicated comparator such as TLV1504 for latch-style protection.
推薦
Buffer Stage for High-Impedance Sources
As a unity-gain buffer in front of a high-impedance source such as a photodiode, strain-gauge bridge or capacitive humidity sensor, the MCP6021-E/P avoids loading errors because its CMOS input impedance is very high and its bias current is in the picoamp range. The 10 MHz gain-bandwidth product provides ample loop gain at audio and low-frequency instrumentation frequencies, keeping closed-loop gain error small, while the 7 V/us slew rate handles the output transitions demanded by capacitive sensor nodes. Add a small series resistor at the source to damp the capacitive load and stabilize the amplifier.
推薦
推薦產品摘要
工程參考資料，適用於 MCP6021-E/P — 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 | MCP6021-I/P | MCP6021R-E/P | MCP6101-E/P | MCP6001-E/P | OP42FZ |
|---|---|---|---|---|---|---|
| Package | 8-PDIP (0.300 in, 7.62 mm) | 8-PDIP (0.300 in, 7.62 mm) - same | 8-PDIP (0.300 in, 7.62 mm) - same | 8-PDIP (0.300 in, 7.62 mm) - same | 8-PDIP (0.300 in, 7.62 mm) - same | 8-PDIP (0.300 in, 7.62 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Analog Devices |
| Number of Amplifiers | 1 | 1 | 1 | 1 | 1 | 1 |
| Gain Bandwidth Product | 10 MHz (typical) | 10 MHz (typical) | 10 MHz class | 18 MHz class | 1 MHz class | 5 MHz class |
| Supply Voltage Range | 2.5 V to 5.5 V single supply | 2.5 V to 5.5 V single supply | 2.5 V to 5.5 V single supply | 2.5 V to 5.5 V single supply | 1.8 V to 6 V single supply | Dual supply, +/-5 V to +/-18 V |
| Operating Temperature Range | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -55 C to +125 C |
主要差異化特點
- Half the worst-case input offset of the industrial-grade variant (對比MCP6021-I/P)
- 10 MHz bandwidth at only 1.0 mA of supply current (對比MCP6001-E/P)
- Single-supply rail-to-rail operation versus dual-supply requirement (對比OP42FZ)
- Rail-to-rail input and output with low offset in an extended-temperature package (對比MCP6101-E/P)
設計說明
Place the 0.1 uF ceramic bypass capacitor directly between pin 7 (V+) and pin 4 (V-) as close to the pins as possible, and add a 1.0 uF bulk capacitor in parallel if the supply line is long or shared with switching circuitry. Keep the ground connection at pin 4 short and wide, and route the non-inverting and inverting inputs away from the supply and output traces to avoid supply-to-output coupling from common-impedance inductance.
When driving a capacitive load such as a long sensor cable or an ADC sample-and-hold input, isolate the amplifier with a 20 ohm to 100 ohm series resistor placed within a few millimeters of pin 6. The 10 MHz gain-bandwidth product and 7 V/us slew rate can otherwise excite capacitive feedback and cause peaking or oscillation. This is the most common field-failure mode for small CMOS op amps and is easy to prevent at the layout stage.
Do not treat the MCP6021-E/P as a general-purpose comparator. It lacks a latch function and its output behaviour on overdrive depends on the internal architecture, so for protection and fault-detection use a dedicated comparator such as the TLV1504. Also confirm the 2.5 V minimum supply before applying inputs; the rail-to-rail input stage is only valid across the specified 2.5 V to 5.5 V range.
In designs with switching regulators or DC-DC converters on the same board, bias the amplifier from a filtered rail or add an RC filter (for example 10 ohm and 10 uF plus a local 100 nF) ahead of the supply pin. The 8.7 nV/sqrt(Hz) input noise specification is measured on a quiet bench and will not protect you from converter ripple; PSRR degrades well above the 1 kHz region where most small CMOS amplifiers roll off.
合規資訊
No explicit RoHS, REACH or AEC-Q100 statements were present in the verified web data for MCP6021-E/P; values are left as unknown rather than assumed. The device is an industrial/extended-temperature grade general-purpose amplifier and is not marketed as AEC-Q100 qualified.
