MCP6021-E/P - 10MHz RRIO CMOS Op Amp, 1mA | Microchip
MPN: MCP6021-E/P ✓ Hoạt độngMCP6021-E/P Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MCP6021-E/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MCP6021-E/P (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Input Noise Density, Mounting Type, Number of Circuits, Package.
MCP6021-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MCP6021R-E/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MCP6101-E/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MCP6001-E/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
OP42FZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP6021-E/P Tỷ lệ tối đa & tính chất điện
| Number of Circuits | 1 |
| Amplifier Type | General Purpose, Rail-to-Rail Input/Output |
| Gain Bandwidth Product | 10 MHz (typical) |
| Điện áp cung cấp | 1.0 mA (typical) |
| Điện áp cung cấp hoạt động | 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) |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (extended temperature grade) |
| Hộp | 8-PDIP (0.300 in, 7.62 mm) |
| Kiểu lắp đặt | Through Hole |
| Packaging Type | Tube |
| Technology | CMOS |
| Trạng thái RoHS | unknown |
| AEC-Q100 Qualification | not_applicable |
Cấu hình chân MCP6021-E/P
| Chân 1 | NC — Not connected (per datasheet) |
| Chân 2 | -IN — Inverting input |
| Chân 3 | +IN — Non-inverting input |
| Chân 4 | V- — Negative supply (ground for single-supply operation) |
| Chân 5 | NC — Not connected (per datasheet) |
| Chân 6 | OUT — Amplifier output |
| Chân 7 | V+ — Positive supply (2.5 V to 5.5 V) |
| Chân 8 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MCP6021-E/P phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCP6021-E/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Half the worst-case input offset of the industrial-grade variant (vsMCP6021-I/P)
- 10 MHz bandwidth at only 1.0 mA of supply current (vsMCP6001-E/P)
- Single-supply rail-to-rail operation versus dual-supply requirement (vsOP42FZ)
- Rail-to-rail input and output with low offset in an extended-temperature package (vsMCP6101-E/P)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
