MCP606-I/ST - 155kHz Micropower CMOS Op Amp | Microchip
Артикул: MCP606-I/ST ✓ АктивенMCP606-I/ST Обзор
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, forming the fundamental building block of analog signal conditioning. Within the power-management and signal-chain hierarchy, the op amp sits at the front end of sensor interfaces, filters, comparators, and active filters, translating raw transducer signals into ADC-ready voltages. Rail-to-rail output op amps like the MCP606 maximize usable dynamic range in low-voltage, single-supply systems.
The MCP606's headline features are its ultra-low power consumption, precision offset, and rail-to-rail output swing. The 18.7 uA typical supply current makes it well suited to battery-powered designs where every microamp shortens battery life, while the sub-250 uV offset enables accurate amplification of small sensor signals without costly trimming. Input bias current is as low as 80 pA maximum at +85 C, preserving accuracy with high-impedance sources such as piezoelectric or pH electrodes.
Built on Microchip's advanced CMOS process, the MCP606 achieves low bias current together with high open-loop gain and excellent CMRR. The rail-to-rail output stage swings to within millivolts of the supply rails, and the amplifier is unity-gain stable across the 2.5V to 6.0V single-supply range, simplifying design in 3.3V and 5V systems.
Typical applications include battery-powered portable instrumentation, single-supply sensor signal conditioning, active filters, and transducer interface front ends. The wide 2.5V to 6.0V supply range covers both 3.3V logic rails and 5V industrial systems.
Design consideration: because the 155 kHz bandwidth is modest, keep closed-loop gains low for wideband signals; for higher bandwidth in the same family footprint, evaluate MCP608 (1 MHz) and account for its different supply current.
This page adds value beyond the manufacturer datasheet by consolidating distributor sourcing channels, family cross-references, and practical design guidance in one place.
Аналоги без доработки для MCP606-I/ST — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с MCP606-I/ST (тот же форм-фактор и посадочное место) — отличается по Number of Channels, Package, Supply Voltage Range.
MCP606T-I/ST
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MCP606-I/ST Максимальные параметры и электрические характеристики
| Amplifier Type | Standard (General Purpose) Operational Amplifier |
| Number of Channels | 1 |
| Gain Bandwidth Product | 155 kHz |
| Supply Current (typ) | 18.7 uA |
| Supply Current (max, per amplifier) | 25 uA |
| Input Offset Voltage (max) | 250 uV |
| Input Bias Current (max) | 80 pA at +85C |
| Supply Voltage Range | 2.5 V to 6.0 V (single supply) |
| Тип выхода | Rail-to-Rail Output Swing |
| Unity-Gain Stable | Yes |
| Technology | Advanced CMOS |
| Диапазон рабочих температур | -40C to +85C (I grade) |
| Корпус | 8-TSSOP |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов MCP606-I/ST
| Контакт 1 | NC — Not connected (per datasheet) |
| Контакт 2 | IN- — Inverting input |
| Контакт 3 | IN+ — Non-inverting input |
| Контакт 4 | VSS — Negative supply / ground |
| Контакт 5 | NC — Not connected (per datasheet) |
| Контакт 6 | OUT — Rail-to-rail output |
| Контакт 7 | VDD — Positive supply (2.5 V to 6.0 V) |
| Контакт 8 | NC — Not connected (per datasheet) |
Типичное применение
MCP606-I/ST подходит для 6 применениеs: Battery-Powered Portable Instrumentation, Single-Supply Sensor Signal Conditioning, Active Filter Stages, Transducer Interface Front Ends, Microcontroller Analog Peripherals Buffering, Industrial 5V Signal Chains.
Battery-Powered Portable Instrumentation
The MCP606-I/ST's 18.7 uA typical supply current makes it a natural fit for handheld meters, data loggers, and portable medical devices where battery runtime is a headline specification. Its 2.5V to 6.0V single-supply range allows direct operation from two alkaline cells or a single lithium cell with headroom, while the rail-to-rail output stage converts every millivolt of supply into usable signal swing at low battery voltage. With 250 uV maximum offset and 80 pA maximum bias current at +85 C, gain stages remain accurate without calibration. Place the amplifier close to the transducer with a 0.1 uF local decoupling capacitor; the micropower current means no thermal management is required, and PCB self-heating-induced offset drift is negligible.
Рекомендуется
Single-Supply Sensor Signal Conditioning
For transducer channels - thermistors, pressure bridges, photodiodes, and humidity sensors - the MCP606-I/ST provides gain and level shifting on a single 3.3V or 5V rail. The rail-to-rail output swings within millivolts of ground and VDD, so a bridge amplifier's output uses nearly the full ADC input range, improving effective resolution. The sub-250 uV offset voltage keeps small differential signals accurate at gains of 100 or more, and the picoampere bias current avoids loading high-impedance dividers. Configure as a non-inverting amplifier or difference amplifier with 1% resistors; the 155 kHz bandwidth comfortably handles slow physical parameters, and unity-gain stability guarantees operation at any closed-loop gain without external compensation.
Рекомендуется
Active Filter Stages
The MCP606-I/ST implements Sallen-Key and multiple-feedback low-pass, high-pass, and band-pass filters for anti-aliasing and noise limiting in low-frequency signal chains. Its 155 kHz gain bandwidth product supports filter corner frequencies in the tens-of-hertz to low-kilohertz range with adequate open-loop-gain margin to hold the transfer function accurate - as a rule of thumb, keep the filter corner below one-tenth of GBW divided by the filter Q. The micropower 18.7 uA consumption lets continuous-time filters run always-on in battery products without duty cycling, and the rail-to-rail output prevents clipping of the filtered waveform near the rails. Place filter resistors and capacitors close to pins 2, 3, and 6 for layout cleanliness.
Рекомендуется
Transducer Interface Front Ends
High-impedance transducers such as piezoelectric elements, pH probes, and photodiodes demand an amplifier with femto-to-picoampere input current; the MCP606-I/ST's 80 pA maximum bias current at +85 C limits source-loading error to microvolts even with 10 megohm source impedances. Operating from a 2.5V to 6.0V single supply, it works as a transimpedance or buffer stage feeding an MCU's internal ADC, while the CMOS input's low current keeps dark-current and leakage errors small across the industrial temperature range. The 250 uV maximum offset preserves accuracy in direct-coupled topologies. Use guard rings around pin 2 and pin 3 on the PCB and a clean, flux-free board surface to realize the datasheet bias current in practice.
Рекомендуется
Microcontroller Analog Peripherals Buffering
MCU built-in ADCs and DACs present sample-and-hold charge injection and reference-current loads that corrupt unbuffered signals; the MCP606-I/ST buffers DAC outputs and drives ADC inputs from a single 18.7 uA amplifier. Its rail-to-rail output means a 0-to-VDD code from the MCU's DAC is reproduced with nearly no headroom loss, and the 155 kHz bandwidth settles adequately for the slow sampling rates typical of micropower systems. Add a small series resistor plus capacitor at the ADC pin to supply transient sample charge, since a 155 kHz amplifier alone has limited instantaneous current. The 8-TSSOP footprint fits dense mixed-signal boards next to the controller without consuming routing channels.
Рекомендуется
Industrial 5V Signal Chains
On 5V industrial rails the MCP606-I/ST conditions 4-20 mA loop-derived voltages, potentiometer setpoints, and limit-detection comparators with micropower consumption that reduces cabinet heat and permits fully sealed enclosures without ventilation. The 6.0V maximum supply gives margin above nominal 5V rails, and the industrial temperature grade covers -40 C to +85 C for panel-mounted equipment. The rail-to-rail output drives comparator and ADC inputs across the full logic range, and the 250 uV offset allows precise threshold levels without trimming. Pair with a precision voltage reference for the threshold network, and add reverse-polarity and TVS protection upstream of the supply pin per standard industrial practice.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MCP606-I/ST — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MCP606T-I/ST |
|---|---|---|
| Package | 8-TSSOP | 8-TSSOP - same |
| Brand | Microchip Technology | Microchip Technology |
| Channels | 1 | 1 |
| Gain Bandwidth Product | 155 kHz | 155 kHz |
| Supply Current (typ) | 18.7 uA | 18.7 uA |
| Offset Voltage (max) | 250 uV | 250 uV |
| Supply Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| Output Type | Rail-to-rail output | Rail-to-rail output |
Ключевые отличия
- Micropower consumption enables always-on battery designs (против MCP608-I/ST)
- Precision offset without trimming (против Generic micropower op amps)
- Rail-to-rail output maximizes low-voltage dynamic range (против Non-RRO op amps on 3.3V rails)
Заметки по проектированию
Decouple VDD (pin 7) with a 0.1 uF ceramic capacitor placed within a few millimeters of the pin, plus a bulk 1 uF-10 uF capacitor per board section. Although the MCP606 draws only 18.7 uA typical, CMOS amplifiers can inject charge spikes into the supply during output transitions, and shared micropower rails are often high-impedance; insufficient decoupling shows up as oscillation or offset shift. The 2.5V minimum supply means the part stops regulating well below 3.3V rails - add a supervisor or brown-out detector in battery designs so the amplifier output is not trusted as the cell approaches end of charge.
For high-impedance inputs (photodiode, pH, piezo), protect pin 2 and pin 3 with a guard ring driven by the low-impedance input potential and keep traces as short as possible. Board leakage from flux residues can exceed the amplifier's 80 pA bias current by orders of magnitude, defeating the CMOS input advantage. Clean and conformally coat the area around the inputs. Use the exposed standard 8-TSSOP footprint; keep the feedback resistor path over a ground-free region or guard it as well, since feedback-node leakage multiplies directly into output error.
The MCP606 is a rail-to-rail OUTPUT device only - input common-mode voltage does not extend to the positive rail. Verify that the input signal stays within the datasheet common-mode range, especially in follower configurations sensing near VDD; exceeding it causes phase inversion or gain error. Also respect the 155 kHz bandwidth: a unity-gain follower with a fast step input will slew-limit, so allow settling time before ADC sampling. When swapping in MCP608 or MCP607 family members for more bandwidth or channels, re-check supply current and pinout in the shared MCP606/7/8/9 datasheet.
Информация о соответствии
RoHS/lead-free status per Microchip current production of MCP606-I/ST; REACH and halogen-free declarations should be confirmed via Microchip's product page environmental documents.
