MCP619-I/ST - 190 kHz Micropower Quad Op Amp | Microchip
部品番号: MCP619-I/ST ✓ 生産中MCP619-I/ST 概要
A micropower operational amplifier is a low-current linear amplifier designed to provide voltage gain, filtering, buffering, or analog signal conditioning while consuming very little power. The MCP619 belongs to the broader operational amplifier, analog IC, and semiconductor hierarchy, making it suitable for battery-operated instruments, portable measurement systems, and low-power sensor interfaces.
The quad configuration integrates four amplifiers, reducing component count and board area in designs that need several gain stages. Its 190 kHz gain-bandwidth product is adequate for low-frequency instrumentation, current-loop amplifiers, and slow sensor-conditioning paths. The 80 mV/µs slew rate supports small-signal step responses without requiring a high-speed general-purpose amplifier.
Low power is the main technical advantage: a typical operating current of 19 µA per amplifier suits energy-limited designs better than standard 1 mA-class quad op amps. The device also combines a maximum input offset voltage of ±150 µV, typical input bias current of 0.3 nA, 100 dB CMRR, low input noise of 2.2 µVP-P to 10 Hz, and rail-to-rail output swing. Built-in compensation and reverse-phase input protection simplify common analog front-end layouts.
Typical uses include portable ECG and biosignal conditioning, current sensing, bridge-sensor amplification, battery monitoring, general-purpose buffer and gain stages, and low-power data acquisition. Four amplifiers in one package are particularly useful when the system needs matched channels, sensor interfaces, or a mix of amplifiers and buffers.
When designing with the MCP619-I/ST, keep the input and output stages close to the amplifier pins, provide stable feedback networks, and account for input bias-current error when driving high-impedance sources. The TSSOP package also requires careful solder-paste and reflow control to avoid bridging between the closely spaced leads.
This page consolidates manufacturer specifications, package and pin information, sourcing guidance, design notes, and application-oriented selection advice into one engineering reference for the MCP619-I/ST.
ドロップイン代替品: MCP619-I/ST — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストMCP619-I/ST 最大定格＆電気的特性
| Number of Amplifiers | 4 amplifiers |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Gain-Bandwidth Product | 190 kHz |
| Typical Operating Current | 19 µA per amplifier |
| Maximum Input Offset Voltage | ±150 µV |
| Typical Input Offset Current | 0.3 nA |
| Input Noise | 2.2 µVP-P typical, 10 Hz to 80 Hz bandwidth |
| Common-Mode Rejection Ratio | 100 dB |
| Slew Rate | 0.08 V/µs |
| Output Swing | Rail-to-rail |
| Compensation | Built-in compensation |
| Input Protection | Reverse-phase input protection |
| 動作温度範囲 | -40°C to +85°C |
| パッケージ | 14-pin TSSOP |
| 実装タイプ | Surface mount |
| Technology | Advanced CMOS |
| Input Bias Current | -5 nA typical |
| Lead-Free Packaging | Yes |
MCP619-I/ST ピン構成
| ピン 1 | OUTA — Amplifier A output |
| ピン 2 | IN-A- — Amplifier A inverting input |
| ピン 3 | IN-A+ — Amplifier A non-inverting input |
| ピン 4 | V+ — Positive supply connection |
| ピン 5 | INB+ — Amplifier B non-inverting input |
| ピン 6 | INB- — Amplifier B inverting input |
| ピン 7 | OUTB — Amplifier B output |
| ピン 8 | OUTC — Amplifier C output |
| ピン 9 | INC- — Amplifier C inverting input |
| ピン 10 | INC+ — Amplifier C non-inverting input |
| ピン 11 | V- — Negative supply connection |
| ピン 12 | IND+ — Amplifier D non-inverting input |
| ピン 13 | IND- — Amplifier D inverting input |
| ピン 14 | OUTD — Amplifier D output |
主な用途
MCP619-I/ST の用途: 6 件s: Portable Sensor Signal Conditioning, Battery-Powered Data Acquisition, Low-Current Measurement Front End, Medical and Biosignal Buffering, Audio and Communication Line Buffers, Precision Bridge and Resistive Sensor Amplification.
Portable Sensor Signal Conditioning
The MCP619-I/ST fits portable sensor-conditioning blocks because each amplifier operates at 19 µA typical current from a 2.3 V to 5.5 V supply. Four integrated channels can amplify, buffer, and differentially condition multiple resistive sensors without adding separate packages. A 190 kHz gain-bandwidth product is appropriate for temperature, pressure, and position sensors whose useful bandwidth is far below kilohertz rates. The 0.3 nA typical input bias current also helps preserve accuracy with high-impedance dividers, although the complete source impedance must be included in the offset-error calculation.
おすすめ
Battery-Powered Data Acquisition
The MCP619-I/ST is useful in battery-powered data-acquisition front ends where four low-frequency analog channels must share a small package. Its 2.3 V minimum supply voltage supports reduced-voltage sensing systems, while rail-to-rail output swing helps use the available signal range. Place the device near the sensor or multiplexer outputs to limit noise pickup, and select external resistors according to the ADC input range rather than driving the amplifier into saturation. Total current consumption should include all four channels, the ADC, and bias networks.
おすすめ
Low-Current Measurement Front End
The MCP619-I/ST can buffer a low-current sensor and amplify the resulting error voltage in instrumentation designs. Its ±150 µV maximum input offset, 100 dB CMRR, and low typical input bias current help reduce systematic measurement error, while the 190 kHz gain-bandwidth product covers low-bandwidth current loops and monitor signals. Avoid driving long unprotected input traces with high source impedance, and verify common-mode headroom when the sensor output can move near either supply rail.
おすすめ
Medical and Biosignal Buffering
The MCP619-I/ST is appropriate for low-frequency biosignal buffering when the design requires low quiescent current and several amplifiers in one package. The 19 µA typical operating current per channel reduces the load on portable power sources, and the low offset and bias currents support high-impedance electrode interfaces. Use the amplifiers only within the electrical limits stated in the manufacturer datasheet, keep input routing short, and apply appropriate protection against electrostatic discharge and patient-contact fault conditions.
おすすめ
Audio and Communication Line Buffers
The MCP619-I/ST can serve as a general-purpose unity-gain buffer in low-level audio or communication paths where moderate bandwidth is sufficient. Rail-to-rail output swing supports direct coupling between stages, and the 80 mV/µs slew rate produces practical small-signal response. Its 190 kHz gain-bandwidth product should be compared with the highest audio or channel frequency, while the 19 µA typical current supports low-power monitoring and headset-adjacent designs. Avoid using it where full audio bandwidth or low distortion at large levels is mandatory.
おすすめ
Precision Bridge and Resistive Sensor Amplification
The MCP619-I/ST is well suited to resistive bridge and strain-gauge conditioning because four amplifiers can implement instrumentation-style signal paths in one package. Low input offset voltage below 150 µV reduces output error after the configured gain is applied, and 100 dB CMRR improves rejection of common-mode supply variation. Choose resistor networks with matched ratios and temperature characteristics, confirm the gain-bandwidth margin at the highest signal frequency, and verify that bridge excitation and output swing remain inside the device's supply limits.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MCP619-I/ST — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Brand | Microchip Technology |
| Package | 14-pin TSSOP |
| Number of Amplifiers | 4 amplifiers |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Gain-Bandwidth Product | 190 kHz |
| Typical Operating Current | 19 µA per amplifier |
| Maximum Input Offset Voltage | ±150 µV |
| Input Bias Current | 0.3 nA typical input offset current |
| Common-Mode Rejection Ratio | 100 dB |
| Slew Rate | 0.08 V/µs |
| Output Swing | Rail-to-rail |
| Operating Temperature Range | -40°C to +85°C |
主な差別化要因
- Four low-power amplifiers in one package （vs MCP619T-I/ST)
- Low input offset for precision low-frequency conditioning （vs MCP619T-I/ST)
- Rail-to-rail output from a 2.3 V minimum supply （vs MCP619T-I/ST)
設計ノート
Budget the supply current for all four amplifier channels rather than one. At the 19 µA typical operating current per amplifier, the amplifier array alone accounts for approximately 76 µA under that operating condition. Confirm the actual channel state, output voltage, and supply voltage against the characteristic curves before relying on the typical figure, and add the ADC, reference, divider, and protection currents to the complete power budget.
Place feedback resistors and input-connection components close to their associated amplifier pins, especially for the 190 kHz gain-bandwidth device. Keep sensitive input traces away from switching nodes and high-current return paths. Because the TSSOP leads are closely spaced, verify the package drawing and land pattern during PCB review and use a controlled reflow profile to reduce solder bridging risk.
Calculate input-offset error from both voltage offset and bias current when driving a high-impedance sensor. The typical input bias-current figure is 0.3 nA, so the current-related error at the source impedance can become significant even though the voltage offset is limited to ±150 µV maximum. Use the pin-description table for stable feedback connections and verify input and output common-mode limits throughout the signal range.
Do not assume the 190 kHz gain-bandwidth product is the usable closed-loop bandwidth for every gain setting and load. Noise gain, capacitive loading, and output stability interact with that value. Keep capacitive loads within the manufacturer recommendations, avoid long feedback-loop traces, and confirm the output settles as expected with the intended gain and sensor impedance.
コンプライアンス情報
The product information identifies a lead-free plastic package. RoHS, REACH, halogen-free, and conflict-minerals declarations are not stated in the available product information.
