MC33071D - 44V Single-Supply Op Amp, 4.5MHz GBW | onsemi
料号： MC33071D ✓ 量产中MC33071D 概述
An operational amplifier, or op amp, is a high-gain differential amplifier whose inverting and non-inverting inputs are compared and whose output is driven to correct the difference between them. In the product-type hierarchy, an op amp belongs to the amplifier IC class, then to analog integrated circuits, then to the wider semiconductor family. Because the MC33071D is built on quality bipolar fabrication with innovative design concepts rather than JFET input devices, it combines wide signal swing capability with fast settling behavior over an unusually wide supply range.
Key features of this device include the wide 3.0 V to 44 V single-supply capability, 4.5 MHz gain-bandwidth product, 13 V/µs slew rate, and low input offset voltage of 3 mV typical (5 mV maximum per the distributor listing). The amplifier operates from a -40 °C to +85 °C ambient temperature range and is specified for standard (general-purpose) instrumentation, buffer and op-amp applications.
Technically, the MC33071D combines a wide internal common-mode and output voltage range with bipolar input and output stages, which allows the output to swing close to the supply rails on low-supply designs while still tolerating industrial rails well above 44 V in feedback loops and sensing stages. The 4.5 MHz bandwidth combined with 13 V/µs slew rate means a 10 V output step settles in roughly a microsecond, fast enough for closed-loop control loops at audio and low-frequency instrumentation bandwidths.
Typical uses include industrial sensor signal conditioning, precision current-sense and voltage-feedback networks in power supplies, low-frequency audio driver stages, transducer and bridge preamplifiers, and general-purpose buffering where the supply rail can exceed the 18 V limit of typical 5 V single-supply op amps.
When designing with this part, remember that the wide supply rating is a maximum, not a target. Keep input and output common-mode voltages inside the linear input range, place a 0.1 µF ceramic bypass capacitor at each supply pin with additional bulk capacitance nearby, and check output swing headroom at the highest ambient temperature.
This page consolidates supply-range, bandwidth, slew-rate and offset specifications together with drop-in alternatives and practical layout guidance, so you can select the amplifier and the surrounding passive network without rebuilding the design from scratch.
直接替换替代料： MC33071D ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC33071D （相同外形与封装尺寸） ——差异在于 Input Offset Voltage, Operating Temperature Range, Package, Process Technology.
MC34071D
✅ 直接替换联系询价
查看数据手册 →NCV33071DR2G
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TLV9351
✅ 直接替换📋 参考替代料（不在目录中）
MIC6211
✅ 直接替换📋 参考替代料（不在目录中）
NCS20071
✅ 直接替换📋 参考替代料（不在目录中）
MC33071D 最大额定值与电气特性
| Number of Amplifiers | 1 (single) |
| Supply Voltage Range (Single Supply) | 3.0 V to 44 V |
| Gain Bandwidth Product | 4.5 MHz |
| Slew Rate | 13 V/µs |
| Input Offset Voltage | 3 mV typ (5 mV max per distributor listing) |
| Amplifier Type | General Purpose (Standard) |
| 拓扑 | Single-ended, voltage feedback |
| 工作温度范围 | -40 °C to +85 °C |
| 封装 | 8-SOIC (SOIC-8), surface mount |
| 引脚数 | 8 |
| 安装类型 | Surface Mount |
| Unity Gain Bandwidth | 4.5 MHz |
| Process Technology | Quality bipolar fabrication (no JFET input devices) |
MC33071D 引脚配置
| 引脚 1 | NC — Not connected (per datasheet) |
| 引脚 2 | IN- — Inverting input |
| 引脚 3 | IN+ — Non-inverting input |
| 引脚 4 | V- — Negative supply (ground in single-supply operation) |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | OUT — Amplifier output |
| 引脚 7 | V+ — Positive supply input |
| 引脚 8 | NC — Not connected (per datasheet) |
典型应用
MC33071D 适用于 6 应用s: Industrial Sensor Signal Conditioning, Power Supply Feedback and Error Amplification, Low-Frequency Audio Preamplifier Stage, Instrumentation Buffer and Active Filter, Battery and Charger Monitoring Front End, Automotive and Heavy Equipment Telemetry.
Industrial Sensor Signal Conditioning
The MC33071D suits 24 V industrial sensing because its 3.0 V to 44 V single-supply range sits directly on the same rail as the sensor and field wiring, removing the level-shifting stage a typical 5 V op amp would require. With 4.5 MHz of gain-bandwidth product and a 13 V/µs slew rate, the amplifier closes a loop around a resistive bridge or thermocouple front end with ample phase margin and fast settling after a change in the measured process variable. The 3 mV typical input offset voltage keeps the sensor bias error small relative to millivolt-level signals. Unlike rail-to-rail CMOS alternatives such as the TLV9351 or NCS20071, the bipolar input stage tolerates the 24 V rail directly. Place a 0.1 µF ceramic bypass at pins 7 and 4, and keep the 2 and 3 input traces away from the supply and output routes so the wide-bandwidth internal stages do not pick up common-mode pickup.
推荐
Power Supply Feedback and Error Amplification
In an isolated or industrial DC-DC converter, the error amplifier sits inside the feedback loop and must operate from the output rail, which can exceed 18 V in 24 V or 48 V systems. The MC33071D supplies that operating point natively with its 3.0 V to 44 V single-supply rating and 4.5 MHz gain-bandwidth product, so the loop crossover can sit high enough to correct ripple quickly while the 13 V/µs slew rate avoids large-signal instability. Because the device is internally compensated, no external compensation network is required in a simple error-amplifier configuration. The tradeoff versus a CMOS op amp is input bias current: a bipolar input stage draws more bias from the sensed node than a rail-to-rail CMOS part, which can shift the bias of a high-impedance feedback divider. Verify that bias contribution against the divider impedance at your operating temperature.
推荐
Low-Frequency Audio Preamplifier Stage
The MC33071D's 4.5 MHz gain-bandwidth product and 13 V/µs slew rate provide more than enough open-loop speed for audio-band signal paths, while the wide supply tolerance allows the stage to run from a higher rail than the audio signal level requires. Its bipolar construction produces low distortion on larger signals compared with a rail-to-rail CMOS amplifier operating near its supply rails, which matters when the output stage swings several volts peak. The single-amplifier 8-SOIC package also keeps board area small for a preamp section, with dual and quad family members available if the design needs several gain stages. Keep the input bias path short and terminated to ground when the source is high impedance, and confirm the output swing headroom at the highest ambient temperature, since the allowable output range narrows as the ambient rises.
推荐
Instrumentation Buffer and Active Filter
As a voltage follower or active filter building block, the MC33071D combines wide open-loop bandwidth with an output stage able to drive the resistive and capacitive loads typical of instrumentation. Follower and Sallen-Key filter topologies need high open-loop gain and stable phase margin across the passband, and the 4.5 MHz gain-bandwidth product with internal compensation gives that behavior without external components. For filters that operate close to the supply rails, remember that the bipolar input stage of this device is not rail-to-rail, so the common-mode range must be checked against the signal excursion; a rail-to-rail CMOS alternative such as the TLV9351 or NCS20071 handles near-rail swings more comfortably. A 0.1 µF bypass at each supply pin plus a few microfarads of local bulk capacitance keeps supply noise from modulating the high-gain stages.
推荐
Battery and Charger Monitoring Front End
Battery management systems routinely monitor cell voltages that exceed the rails of a 5 V control MCU, and the MC33071D's 44 V maximum supply allows the monitoring amplifier to sit on the protected pack rail without an external attenuator chain. The fast slew rate and wide bandwidth let the amplifier buffer a multiplexer-switched voltage divider fast enough to settle between channel changes, avoiding crosstalk in multi-cell monitoring. The 3 mV typical offset is small relative to per-cell mV-level resolution targets, and the -40 °C to +85 °C ambient range covers pack environments. Because the amplifier operates close to its upper supply rating in a 48 V pack, keep the supply decoupling close to pins 7 and 4, confirm that the absolute maximum rating is respected during transient events, and note that bipolar input bias current adds a small load to the divider that should be included in the error budget.
推荐
Automotive and Heavy Equipment Telemetry
Vehicle and heavy-equipment electronics run on 12 V and 24 V battery systems with large transients, and the MC33071D operates across a 3.0 V to 44 V range that covers those rails plus margin. For sensing, excitation and line-driver tasks on the same board, the 13 V/µs slew rate preserves square-wave integrity on digital-to-analog signals while the 4.5 MHz bandwidth handles wideband filtering. For designs requiring automotive qualification, the NCV33071 variant in the same 8-SOIC footprint and with the same family electricals is the appropriate choice, since the standard MC33071D is not qualified for automotive grade. Design the input protection and filtering so that surge transients do not exceed the absolute maximum ratings, and place the bypass capacitors on the supply pins immediately adjacent to the package.
推荐
推荐产品汇总
工程参考数据： MC33071D ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC34071D | NCV33071DR2G | TLV9351 | MIC6211 | NCS20071 |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | Texas Instruments | Microchip Technology | Texas Instruments |
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Number of Amplifiers | 1 (single) | 1 (single) | 1 (single) | 1 (single) | 1 (single) | 1 (single) |
| Maximum Supply Voltage | 44 V | 44 V | 44 V | 5.5 V | 5.5 V | 5.5 V |
| Input Common-Mode Range | Bipolar input stage, not rail-to-rail | Bipolar input stage, not rail-to-rail | Bipolar input stage, not rail-to-rail | Rail-to-rail input | Rail-to-rail input | Rail-to-rail input |
关键差异点
- Operates directly on industrial supply rails （对比 TLV9351)
- Much faster large-signal drive from bipolar output stage （对比 NCS20071)
- Drop-in pin compatibility with the full onsemi family （对比 MC34071D)
- Single amplifier in the smallest member of the family （对比 MC33072D)
设计说明
The MC33071D accepts a single supply up to 44 V, but that rating is an absolute maximum, not an operating target. Keep the continuous supply at least 5 V below the limit for margin against transients, and place a 0.1 µF ceramic bypass directly across pins 7 (V+) and 4 (V-) with the shortest possible trace. Add 1 µF to 10 µF of bulk capacitance a few millimeters away for lower-frequency supply ripple. On 24 V industrial rails the bypass network also handles the switching noise from adjacent converters that would otherwise modulate the amplifier's 4.5 MHz-wide internal stages.
Because the MC33071D has 4.5 MHz of gain-bandwidth product, the input pins 2 and 3 behave like small antennas for fast edges. Route them away from the supply pins, the output pin 6 and any digital switching nets, and keep the ground return of the input source close to the amplifier ground pin. Use a solid ground plane rather than a narrow ground trace, and place the bypass capacitors on the same side of the board as the package. If the input source is far from the device, terminate it with a short resistor and a small capacitor to the ground reference to prevent resonant pickup in the wideband amplifier.
The most common mistake with this part is assuming rail-to-rail input operation. The bipolar input stage means the usable common-mode window depends on the supply rail, so a design that idles the input near ground on a 3 V supply can clip the input stage. Check the input common-mode and output swing curves in the onsemi MC33071/72/74 datasheet for your exact supply voltage, and use a rail-to-rail CMOS alternative such as the TLV9351 or NCS20071 when the signal legitimately reaches the rails. Also note that bipolar input bias current is higher than CMOS types, which can disturb high-impedance dividers.
Do not confuse the single amplifier with the dual and quad members of the same family: the MC33071D, MC33072D and MC33074D share the MC33071/72/74 family name but have different channel counts and different pin assignments, so the dual and quad parts are not pin-to-pin replacements for the single. Likewise, packaging code suffixes such as the tape-and-reel variant refer to the same device rather than an alternative. When the ordering code changes, confirm that the lead finish, temperature grade and pinout still match the footprint already on the PCB.
合规信息
RoHS, REACH, lead-free and halogen-free statements are not stated for this MPN on the manufacturer listing pages and distributor product pages reviewed. The MC33071D is a standard industrial-grade part; use the NCV33071 family member for AEC-Q100 automotive-qualified requirements.
