MC3461L - Dual Current Sense Amplifier | Motorola | CDIP-16
MPN： MC3461L ✗ 停產MC3461L 概覽
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.
直接替換替代品，適用於 MC3461L — 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。
此產品無可直接替換的替代品。
申請替代品MC3461L 最大額定值與電氣特性
| 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 |
| 安裝類型 | Through-hole |
| 腳位數 | 16 pins |
| Manufacturer | Motorola |
MC3461L 16-cdip 腳位配置指南
MC3461L（16-cdip 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MC3461L.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC3461L 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 MC3461L — 比較、設計指引及合規資訊。
選型指南
設計說明
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.
合規資訊
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.
