MC3461L - Dual Current Sense Amplifier | Motorola | CDIP-16
MPN: MC3461L ✗ Cuối đờiMC3461L Tóm tắt
A current-sense amplifier is a specialized voltage-feedback amplifier that develops a measurable output voltage from the small differential voltage created by current flowing through a shunt resistor. The MC3461L contains two circuits, allowing one packaged device to monitor two independent current paths when the circuit board has sufficient isolation and the operating conditions of both channels are compatible. The 16-CDIP mechanical format is a through-hole ceramic dual in-line package intended for legacy industrial, instrumentation, and telecommunications equipment.
The MC3461L's two-circuit architecture reduces component count compared with two separate single amplifiers, while its small shunt-generated differential signal supports compact sensing layouts. However, stable measurement depends on selecting an appropriate shunt, keeping Kelvin connections narrow and symmetrical, and observing the amplifier's common-mode and output limits. Because those numerical limits are absent from the verified excerpts, designers should consult the complete manufacturer datasheet before finalizing resistor values, gain configuration, supply rails, or production tolerances.
The MC3461L is suitable for power-supply current monitoring, battery charge and discharge sensing, motor-control feedback, industrial process-control systems, and communications equipment. In these applications, the amplifier converts bidirectional or unidirectional shunt current into a voltage suitable for an ADC, controller, comparator, or protection circuit. The exact input polarity, output reference arrangement, and permissible common-mode voltage must be verified from the full datasheet before layout sign-off.
A practical design begins by placing the shunt and amplifier in the same high-current path, routing the sense traces as a tightly coupled differential pair, and grounding the unused inputs or amplifier according to the manufacturer's recommended configuration. Decoupling capacitors should connect directly to the supply pins, and the output must remain within the device's verified output range. PCB creepage, clearance, copper heating, and Kelvin-trace geometry are as important as the IC choice in a high-current design.
This page combines verified distributor identity and availability information with clearly marked engineering gaps, practical application context, and design guidance. It does not infer missing electrical specifications from the MC3461 family name, so procurement, electrical, and package decisions should be completed against the official datasheet and current authorized-channel inventory.
Bộ thay thế dễ dàng lắp đặt cho MC3461L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếMC3461L Tỷ lệ tối đa & tính chất điện
| Device Type | Current Sense Amplifier |
| Number of Circuits | 2 circuits |
| Amplifier Technology | NMOS/MECL |
| Product Category | Instrumentation, Op Amps, Buffer Amps |
| Package Type | 16-CDIP |
| Kiểu lắp đặt | Through-hole |
| Số chân | 16 pins |
| Manufacturer | Motorola |
Hướng dẫn cấu hình chân MC3461L 16-cdip
Cấu hình chân cho MC3461L (16-cdip gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho MC3461L.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MC3461L phù hợp cho 6 Áp dụngs: Industrial Power-Supply Current Monitoring, Battery Charge and Discharge Monitoring, Motor Drive Current Feedback, Telecommunications Power-System Monitoring, Precision Power-System Feedback, Process-Control and Instrumentation.
Industrial Power-Supply Current Monitoring
The MC3461L's two independent current-sense amplifier circuits can monitor two current paths when both operate within the same device limits. Each channel can sense the small differential voltage produced across a shunt and provide a scaled signal for an ADC, controller, comparator, or protection circuit. This can reduce the number of amplifier packages in legacy industrial power supplies while keeping the 16-CDIP through-hole format compatible with existing boards. The verified records confirm the dual-circuit architecture and high-speed NMOS/MECL technology, but they do not state gain, common-mode range, output swing, or supply voltage; those values must be confirmed from the manufacturer datasheet before selecting shunt resistance and circuit scaling.
Được đề xuất
Battery Charge and Discharge Monitoring
The MC3461L can support battery current measurement in charging, discharging, and protection systems by amplifying the voltage developed across a series shunt. Its two amplifier circuits allow separate measurement of charge and discharge paths where the circuit arrangement and polarity requirements match. In a battery-management design, the conditioned output can feed a comparator, control input, or analog-to-digital converter for current-limit decisions. Designers must verify the complete electrical limits before implementation, especially the operating supply range, input common-mode capability, output swing, and whether the two channels are electrically independent. Shunt selection should preserve adequate signal resolution without pushing the amplifier beyond those verified limits.
Được đề xuất
Motor Drive Current Feedback
In motor-control systems, the MC3461L can amplify a shunt voltage used to estimate armature or phase current, enabling closed-loop current regulation and short-circuit protection. Its high-speed NMOS/MECL implementation is relevant where the feedback signal must respond quickly, although the verified excerpts do not provide bandwidth, settling-time, gain, or propagation data. The sensing layout should use a Kelvin-connected shunt and tightly matched routing so motor-switching transients do not corrupt the differential measurement. Before schematic release, verify common-mode range, output swing, supply tolerance, and operating temperature against the intended bus voltage and switching environment.
Được đề xuất
Telecommunications Power-System Monitoring
The MC3461L's dual-channel current-sense architecture fits legacy telecommunications power modules that monitor positive and negative supply or load currents. By converting small shunt drops into control voltages, the amplifier can support load regulation, fault detection, and remote power monitoring without placing multiple separate amplifier packages on the board. Its 16-CDIP package also suits older through-hole instrumentation layouts. Actual deployment still requires checking the manufacturer's recommended supply rails, common-mode range, output swing, noise behavior, and temperature limits, none of which are stated in the verified snippets. PCB trace geometry and shunt placement are critical for preserving measurement accuracy under changing load current.
Được đề xuất
Precision Power-System Feedback
The MC3461L can serve as the analog front end for a power-conversion feedback loop by scaling the voltage across a current shunt and returning the result to a switching controller or digital regulator. The device's two amplifier circuits can support simultaneous monitoring or redundant feedback channels when the operating conditions are compatible. Because the supplied distributor records identify the device only as a dual current-sense amplifier, designers must confirm gain, accuracy, bandwidth, supply limits, and output behavior from the complete datasheet. The sense traces should remain tightly coupled and connect to the shunt through dedicated Kelvin paths, avoiding shared copper that carries unrelated load current.
Được đề xuất
Process-Control and Instrumentation
The MC3461L is categorized as an instrumentation, op-amp, and buffer amplifier and can measure low-level differential signals associated with transducers, actuator currents, and industrial test equipment. Its dual circuit count makes it useful when a single board must monitor two control variables without increasing the component footprint as much as two discrete amplifier packages would. For process instrumentation, the designer must verify input offset, gain accuracy, common-mode range, output swing, supply current, and temperature performance against the sensor interface and plant environment. The verified data does not quantify these parameters, so the MC3461L should enter the design process only after those limits are reconciled with the complete manufacturer documentation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC3461L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
Ghi chú thiết kế
Use dedicated Kelvin sense traces from the shunt terminals to the amplifier inputs. Keep the pair tightly coupled, equal in length where practical, and routed away from motor-switching nodes, clock edges, and high-current copper. The supplied records establish a two-circuit 16-CDIP device but do not provide a complete pinout, so verify signal and no-connect assignments against the official datasheet before routing.
Do not select the shunt resistance or amplifier gain from the distributor snippets alone. First confirm the MC3461L's input common-mode range, output voltage range, gain, supply limits, and accuracy from the manufacturer datasheet; then choose a shunt that produces adequate resolution while keeping worst-case current and tolerance within those limits. This prevents sensor saturation and protects the measurement chain.
Place any required bypass capacitors immediately across the corresponding supply pins, with the shortest possible return path to the device ground. On a 16-CDIP board, preserve adequate clearance around the package and consider the thermal contribution from shunt heat and nearby regulators. The verified excerpts do not specify a thermal rating, pin mapping, or exposed thermal pad, so do not infer heat-dissipation features from the package family.
Thông tin tuân thủ
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Because the MC3461L is a legacy 16-CDIP device, current manufacturer or distributor declarations should be reviewed before new regulated production use.
