MC3303DG - 4-Channel 1 MHz Op Amp | onsemi | 14-SOIC
MPN： MC3303DG ✓ 啟用中MC3303DG 概覽
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs. In the product taxonomy, the MC3303DG belongs to the operational-amplifier and instrumentation-amplifier hierarchy, then to the broader amplifier IC and semiconductor categories. Its internally compensated architecture simplifies design by fixing the gain-bandwidth relationship while preserving a practical combination of supply flexibility, low power consumption, and general-purpose functionality.
The principal electrical features include four independent amplifiers, 1 MHz gain-bandwidth product, 0.6 V/us slew rate, and 8 mV input offset voltage as listed for the industrial-temperature version. The device operates from 3 V to 36 V under a single supply, while dual-supply operation remains possible when the total supply span is adequate. A class AB output stage supports practical drive into typical feedback networks, and true differential inputs help reject common-mode signals when both inputs are biased within the common-mode range.
The MC3303 architecture is intended as a cost-conscious alternative to the uA741-class quad amplifier while adding advantages for modern single-supply systems. Internal frequency compensation removes the need for a dominant-pole compensation capacitor in most closed-loop applications. Designers must still account for output swing, input common-mode range, bias current, noise, stability, and supply bypassing when using the amplifier in precision or high-frequency circuits.
Typical applications include industrial control loops, transducer and sensor signal conditioning, audio preamplification, analog measurement front ends, power-supply feedback networks, and low-frequency communications equipment. Four amplifiers in one package can reduce board area in designs requiring multiple independent analog channels, although common supply routing and decoupling remain critical.
The most important design practice is to place input, output, and bypass connections for short, low-impedance paths while keeping sensitive input traces away from power outputs and switching nodes. Verify the exact input and output voltage limits, bias-current behavior, load capability, and noise specifications against the manufacturer datasheet before finalizing a precision application.
This page consolidates verified distributor information, package-specific alternatives, technical comparisons, and practical design guidance for engineers evaluating the MC3303DG. It emphasizes what is confirmed from supplied sources and explicitly marks unavailable electrical details rather than estimating them, supporting more reliable procurement and design decisions.
直接替換替代品，適用於 MC3303DG — 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： MC3303DG （相同外形與佔位） — 差異在於 Package, Mounting Type, Number of Amplifiers, Product Type, Frequency Compensation.
MC3303D
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC3403D
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC3303N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC3403N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM324D
✅ 直接替換聯絡詢價
查看資料表 →MC3303DG 最大額定值與電氣特性
| Product Type | Quad operational amplifier |
| Number of Amplifiers | 4 circuits |
| Amplifier Type | General Purpose |
| Supply Voltage Range, Single Supply | 3 V to 36 V |
| Dual-Supply Voltage Range | +/-1.5 V to +/-18 V |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 0.6 V/us |
| Input Offset Voltage | 8 mV |
| Operating Temperature Class | Industrial temperature |
| Input Stage | True differential |
| Output Stage | Class AB |
| Frequency Compensation | Internal |
| Short-Circuit Protection | Yes |
| 封裝 | 14-SOIC, 0.154 in x 3.90 mm body width |
| Packaging | Tube |
| 安裝類型 | Surface mount |
| Total Number of Pins | 14 pins |
MC3303DG 腳位配置
| 腳位 1 | OUT1 — Amplifier 1 output |
| 腳位 2 | IN1- — Amplifier 1 inverting input |
| 腳位 3 | IN1+ — Amplifier 1 non-inverting input |
| 腳位 4 | V- — Negative supply or ground in single-supply operation |
| 腳位 5 | IN2+ — Amplifier 2 non-inverting input |
| 腳位 6 | IN2- — Amplifier 2 inverting input |
| 腳位 7 | OUT2 — Amplifier 2 output |
| 腳位 8 | OUT3 — Amplifier 3 output |
| 腳位 9 | IN3- — Amplifier 3 inverting input |
| 腳位 10 | IN3+ — Amplifier 3 non-inverting input |
| 腳位 11 | V+ — Positive supply |
| 腳位 12 | IN4+ — Amplifier 4 non-inverting input |
| 腳位 13 | IN4- — Amplifier 4 inverting input |
| 腳位 14 | OUT4 — Amplifier 4 output |
典型應用
MC3303DG 適用於 6 應用s: Industrial Sensor Signal Conditioning, Process Control Loops, Audio Preamplification, Analog Measurement Front Ends, Power Supply Feedback Networks, Low-Frequency Communications.
Industrial Sensor Signal Conditioning
The MC3303DG fits low-frequency industrial sensor-conditioning circuits because its four true-differential amplifier channels, 1 MHz gain-bandwidth product, and 3 V to 36 V single-supply range support common analog front ends. A typical implementation amplifies bridge, level, or position-sensor signals before filtering and conversion. The 0.6 V/us slew rate is generally adequate for slow process signals, while the 8 mV input offset voltage should be checked against the required measurement accuracy. Because each channel has independent inputs and output, designers can use multiple gain stages on one board.
推薦
Process Control Loops
The MC3303DG is suitable for industrial process-control error amplifiers, actuator feedback paths, and set-point comparators where several low-frequency channels share a control board. Its 1 MHz gain-bandwidth product supports closed-loop operation well below the device's full small-signal bandwidth, and the 0.6 V/us slew rate provides adequate response for many temperature, pressure, and flow loops. The 14-SOIC package consolidates four channels, but input common-mode range and output swing must remain compatible with the controller supply and sensor signal levels.
推薦
Audio Preamplification
The MC3303DG can support microphone, line-level, and headphone-driver preamplifier blocks when the signal bandwidth is modest. Its 0.6 V/us slew rate is suitable for many low-frequency audio paths, and the 1 MHz gain-bandwidth product allows useful closed-loop gain above the audio band when operating at a reasonable noise gain. Four amplifiers in a 14-SOIC package can implement microphone, tone, and auxiliary channels efficiently. Engineers should verify output swing, load capability, input bias behavior, and noise specifications in the manufacturer datasheet for the intended gain and impedance.
推薦
Analog Measurement Front Ends
The MC3303DG is useful in general-purpose analog measurement front ends that amplify, scale, and offset sensor outputs before an ADC. Its true differential inputs are particularly relevant when both sides of a differential sensor are available, helping reject common-mode disturbance when the signal remains inside the input common-mode range. A 3 V minimum single supply enables operation from compact 3.3 V or 5 V systems, while the 36 V maximum supports higher industrial rails. The 8 mV offset voltage must be included in the error budget when the measured signal is small.
推薦
Power Supply Feedback Networks
The MC3303DG can be used in feedback, current-sense, and auxiliary regulation circuits around low-frequency power-conversion stages. Its 1 MHz gain-bandwidth product and 0.6 V/us slew rate are sufficient for many error amplifiers and monitoring comparators, while the broad 3 V to 36 V supply range supports both low-voltage and industrial systems. Designers should place the amplifier close to the feedback node, keep the high-impedance input route short, and separate it from switching currents. Output drive and stability should be verified for the feedback compensation selected for the target converter.
推薦
Low-Frequency Communications
The MC3303DG can provide low-frequency amplification in communications equipment such as audio interfaces, receive-chain blocks, and baseband conditioning circuits. Its 1 MHz gain-bandwidth product is adequate for many voice-band and slow baseband functions, and the 0.6 V/us slew rate helps preserve signal edges without requiring a high-speed amplifier. Four channels in one 14-SOIC package reduce board count. The device is best selected when its 8 mV input offset voltage and single-supply limitations meet the link's noise, bandwidth, and headroom requirements.
推薦
推薦產品摘要
工程參考資料，適用於 MC3303DG — 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 | MC3303D | MC3403D | MC3303N | MC3403N | LM324D |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | Texas Instruments |
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
| Amplifier Type | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
主要差異化特點
- Four true-differential general-purpose amplifiers in one package (對比LM324D)
- Broad single-supply operating range (對比MC3303D)
- Simplified compensated analog design (對比MC3403D)
- Industrial-temperature source availability (對比MC3403N)
設計說明
The verified operating range permits a single supply from 3 V to 36 V or split supplies from +/-1.5 V to +/-18 V. Place the primary bypass capacitor immediately across the V+ and V- pins, with a short ground return. Before choosing the supply voltage, verify the actual input common-mode range and output swing at the intended load; a valid nominal supply does not guarantee linear operation near either rail.
Route each non-inverting input as a short, guarded track and connect feedback resistors close to the relevant amplifier pins. High-impedance input nodes are sensitive to leakage and coupling, so keep them away from output pins, supply bypassing current paths, and switching nodes. Maintain a continuous ground plane under the device and return output-load current without forcing it through the input-reference ground path.
Do not assume that four independent channels eliminate the need to check individual stability. Each amplifier's noise gain, feedback values, load capacitance, and output swing determine practical behavior. The verified 1 MHz gain-bandwidth product and 0.6 V/us slew rate are small-signal and slewing limits, while the 8 mV offset can dominate a low-level measurement. Include offset, bias current, common-mode range, and output-current limits in the system error budget.
The MC3303DG is an analog IC rather than a discrete power semiconductor, so no safe-operating-area chart is applicable. Thermal design should nevertheless account for internal power dissipation under sustained output current and elevated ambient temperature. Use the manufacturer's package thermal information and maximum supply-current ratings, maintain PCB copper for heat spreading, and avoid driving loads continuously beyond the datasheet output-current specification.
合規資訊
The supplied verified search results do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Compliance must be confirmed from current onsemi product documentation before qualification.
