MC33174N - Low Power Quad Bipolar Op-Amp, 2.1MHz | STMicroelectronics
MPN: MC33174N ✓ Hoạt độngMC33174N Tóm tắt
An operational amplifier (op-amp) is a voltage-amplifier building block whose gain, bandwidth and accuracy are shaped by negative feedback around a high-gain differential input stage. The MC3x174 family is built with monolithic bipolar fabrication and provides four amplifiers in a single package, making it a member of the analog amplifier IC hierarchy: op-amp -> quad operational amplifier -> analog amplifier IC -> analog semiconductor. Because four amplifiers share one package, a quad device reduces board area, decoupling capacitor count and total part count compared with four discrete single amplifiers.
Key features of the MC33174N include the 200 uA low-consumption bias current that suits battery-fed and low-leakage measurement systems, the 2.1 MHz gain-bandwidth product that supports audio-band and general instrumentation signal paths, and the 2 V/uS slew rate that limits large-signal distortion on fast transients. The wide +4 V to +44 V supply span covers industrial 24 V rails, telecom 48 V style environments and split-supply laboratory setups from a single part family, and the rail-to-rail-referenced input stage avoids the need for a mid-supply bias network.
Technically, the MC33171/72/74 series uses quality bipolar fabrication with high open-loop gain and 2.1 V/uS slew rate without relying on JFET input devices, which keeps input bias current low and stable while preserving moderate input impedance. The monolithic quad arrangement also means a common die and a common bias network, so all four channels track closely in offset and bandwidth. Because the package is a through-hole PDIP-14 with generous lead spacing, the part is easy to prototype on perfboard and to socket in legacy industrial equipment where surface-mount footprints are impractical.
Typical applications include low-power sensor signal conditioning on 24 V industrial loops, battery-powered portable instrumentation, active filters and audio input stages, and general-purpose amplification inside test and measurement equipment. The 44 V maximum supply also allows the part to sit directly behind a protected 24 V or 36 V field wiring with additional headroom for transients.
When designing with the MC33174N, note that the amplifier is intended for single-supply operation from +4 V, and while the common-mode input range reaches the lower rail, the output swing and offset behavior near that rail still deserve checking against the signal range you need. Decouple the supply pins close to the package, keep feedback resistors in the same range so noise and offset match, and confirm the input common-mode window in your specific gain configuration before relying on signals close to ground.
This page consolidates the manufacturer datasheet parameters, package and pinout detail, plus drop-in replacement candidates and practical design notes, so that you can qualify the MC33174N for a new design or an obsolescence-driven substitution without hunting through multiple documents.
Bộ thay thế dễ dàng lắp đặt cho MC33174N — 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 MC33174N (cùng hình factor và footprint) — khác nhau ở Package, Mounting Type, Amplifier Type, Gain-Bandwidth Product, Number of Pins.
LM201AD
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →TL074CN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TL084CN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LM324N
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →TL074CP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC33174N Tỷ lệ tối đa & tính chất điện
| Number of Amplifiers | 4 |
| Amplifier Type | Quad bipolar operational amplifier |
| Gain-Bandwidth Product | 2.1 MHz |
| Slew Rate | 2 V/uS |
| Quiescent Supply Current | 200 uA per amplifier |
| Single Supply Voltage Range | +4 V to +44 V |
| Input Common-Mode Range | Extends down to the lower supply rail |
| Input Stage Technology | Bipolar (no JFET input devices) |
| Hộp | PDIP-14 (14-pin through-hole dual in-line) |
| Kiểu lắp đặt | Through-hole |
| Số lượng chân | 14 |
| Product Type | Standard (general purpose) amplifier |
| Series | MC3x174 (MC33171 / MC33172 / MC33174) |
Cấu hình chân MC33174N
| Chân 1 | OUT 1 — Amplifier 1 output |
| Chân 2 | IN- 1 — Amplifier 1 inverting input |
| Chân 3 | IN+ 1 — Amplifier 1 non-inverting input |
| Chân 4 | V- — Negative supply rail |
| Chân 5 | IN+ 2 — Amplifier 2 non-inverting input |
| Chân 6 | IN- 2 — Amplifier 2 inverting input |
| Chân 7 | OUT 2 — Amplifier 2 output |
| Chân 8 | OUT 3 — Amplifier 3 output |
| Chân 9 | IN- 3 — Amplifier 3 inverting input |
| Chân 10 | IN+ 3 — Amplifier 3 non-inverting input |
| Chân 11 | V+ — Positive supply rail |
| Chân 12 | IN+ 4 — Amplifier 4 non-inverting input |
| Chân 13 | IN- 4 — Amplifier 4 inverting input |
| Chân 14 | OUT 4 — Amplifier 4 output |
Ứng dụng tiêu biểu
MC33174N phù hợp cho 6 Áp dụngs: 24V Industrial Sensor Signal Conditioning, Battery-Powered Portable Measurement, Active Filters and Audio Preamplification, Test and Measurement Front Panels, Power Supply Feedback and Load Sharing, IoT Edge Sensor Conditioning.
24V Industrial Sensor Signal Conditioning
The MC33174N suits 24 V field instrumentation because its +4 V to +44 V supply span leaves transient headroom over nominal 24 V rails, and its input common-mode range reaches the lower rail so 4-20 mA and 0-10 V sensor inputs referenced near 0 V need no artificial bias. Each amplifier consumes 200 uA, keeping loop-powered transmitters from wasting budget on standing current. Place the device behind input protection, and use the 2.1 MHz gain-bandwidth for the modest closed-loop gains typical of current-to-voltage conversion stages.
Được đề xuất
Battery-Powered Portable Measurement
With 200 uA per amplifier, the MC33174N is a good fit for handheld meters and portable data loggers where standby current dominates the battery budget. The rail-referenced input stage allows measuring battery-relative signals directly, removing the bias resistor network that would otherwise draw continuous current. Because the amplifiers share one monolithic die and one bias network, channel offset and drift track closely, which matters when comparing several sensors against each other in a portable instrument.
Được đề xuất
Active Filters and Audio Preamplification
A 2.1 MHz gain-bandwidth product and 2 V/uS slew rate make the MC33174N appropriate for audio-band and low-frequency active filter stages, such as anti-alias filters ahead of an ADC or preamplifier gain blocks for microphones and line-level sources. The quad configuration lets one package build a complete Sallen-Key biquad or a multi-stage gain chain, reducing board area in audio preamp and active-filter designs. Keep the feedback resistors similar in value so noise and offset remain balanced across stages.
Được đề xuất
Test and Measurement Front Panels
In bench instrumentation the MC33174N provides four general-purpose amplifier channels in one through-hole package, which is convenient for legacy panel designs that use sockets and hand-wired interconnects. The wide supply range supports instrument front ends running from +/-12 V style rails, while the single-supply capability covers portable handheld testers. The bipolar input stage and 2 V/uS slew rate give adequate large-signal behavior for source-following and impedance-buffering duties around the front panel.
Được đề xuất
Power Supply Feedback and Load Sharing
The MC33174N can supervise and amplify error signals around a supply stage, for example in a linear regulator error amplifier, a load-share comparator network, or a battery charger control loop. Because the input common-mode range reaches the lower rail, the error amplifier can work directly on a 0 V-referenced feedback node, and the +44 V capability tolerates the boosted rails seen in telecom or industrial power modules. Keep loop compensation components close to the device and verify stability across load transients.
Được đề xuất
IoT Edge Sensor Conditioning
Edge sensor nodes that must run from a small energy budget benefit from the 200 uA per amplifier consumption, and the quad channel count lets a single MC33174N condition several resistive or capacitive sensor outputs before conversion. The through-hole PDIP-14 package suits hand-assembled prototypes and low-volume builds where pick-and-place for a surface-mount quad would add cost. Design the analog section with the supply decoupling and the sensor return paths in mind to keep the low-noise benefit of the bipolar input stage.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC33174N — 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 | LM201AD | TL074CN | TL084CN | LM324N | TL074CP |
|---|---|---|---|---|---|---|
| Package | PDIP-14 | PDIP-14 - same | PDIP-14 - same | PDIP-14 - same | PDIP-14 - same | PDIP-14 - same |
| Brand | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
| Mounting Type | Through-hole (PDIP-14) | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
Bảo phân biệt quan trọng
- Widest single-supply operating range in this drop-in set (vsTL074CN)
- Higher gain-bandwidth than the low-cost legacy alternative (vsLM324N)
- Input common-mode range reaching the lower supply rail (vsLM201AD)
- Lower standing current for battery and loop-powered nodes (vsTL084CN)
Ghi chú thiết kế
Estimated: with the device running at the top of its supply range, for example 44 V total supply and 200 uA per amplifier, the quiescent dissipation is 44 V x 0.8 mA = about 35 mW across the package, which is negligible thermally. The real thermal concern is output-stage current into a load, not idle bias. Place a 100 nF ceramic decoupling capacitor close to pin 11 (V+) and pin 4 (V-) and add a bulk electrolytic or ceramic of 1 uF or more across the same rails, keeping the loop area small to suppress switching ripple coupled into the amplifier inputs.
The most common mistake with this amplifier family is assuming the input stage reaches the upper rail as well as the lower rail. The manufacturer datasheet confirms the input common-mode range extends down to the lower supply rail, which is what enables single-supply operation, but signals approaching the positive rail still need headroom for the output swing. Before committing to a single-supply design, verify that the maximum input level plus the required output swing stays inside the specified common-mode window for the gain configuration you selected.
The 14-pin PDIP footprint has generous 0.1 inch lead spacing, so hand assembly and socketed prototyping are straightforward. Keep the four amplifier channels away from switching nodes and digital return currents: route the inverting-input traces as short as possible, because parasitic capacitance on a feedback node can reduce phase margin and cause oscillation at the 2.1 MHz gain-bandwidth limit. Separate the V+ and V- return paths for each amplifier if the board carries both high current and high impedance signals.
Use matched feedback resistor networks so that the noise gain of each stage is consistent across the four channels, otherwise offset and thermal-noise contributions differ between channels and the channels will not track each other. On a 24 V industrial board, add input clamp protection ahead of the non-inverting inputs, since a transient coupled from field wiring can exceed the amplifier input rating long before the supply rail does. Route the protection components close to the connector, not close to the amplifier.
Thông tin tuân thủ
No explicit RoHS, REACH, AEC-Q100 or lead-free statements were published on the accessed manufacturer product page or datasheet extract, so all compliance fields are recorded as unknown rather than assumed. Onsemi also lists the MC33171/72/74 family as specified over the industrial and automotive temperature ranges, which suggests an automotive-qualified option exists in the family, but the exact qualification status of this MPN was not confirmed.
