DG412DJ+ - 45Ω Quad SPST Analog Switch | Maxim Integrated
料号： DG412DJ+ ✓ 量产中DG412DJ+ 概述
An analog switch is a semiconductor device that connects or isolates an analog signal path under digital control. The DG412DJ+ belongs to the analog switch hierarchy, where CMOS switching transistors replace mechanical contacts for faster operation, compact integration, and electronic control. Its four independent channels can each connect one analog terminal to one switched terminal, making the device suitable for signal multiplexing, sampling, test-point isolation, and routing systems.
The principal features include four independent SPST switches, a 44 V maximum supply rating, and a 15 V analog signal range. According to the manufacturer datasheet, on-resistance matching between switches is maintained to 3Ω maximum, while guaranteed on-resistance flatness across the signal range is 4Ω maximum. These characteristics help reduce channel-to-channel resistance variation when the same control sequence drives multiple signal paths.
The DG412DJ+ uses TTL- and CMOS-compatible digital inputs, allowing straightforward interfacing with microcontrollers, FPGA I/O, and logic families. Its 110 ns turn-on time supports faster signal-path changes than traditional relay-based implementations. The monolithic CMOS construction also enables low power dissipation, with the datasheet listing 0.35 mW for the characterized operating condition.
Typical applications include multiplexed sensor acquisition, audio and communication signal routing, automated test equipment, data acquisition systems, and general-purpose analog signal isolation. The four-channel arrangement is especially useful when several independent sources must be selected without using mechanical relays. Signal integrity and transient requirements should still be checked against the actual source impedance, load, bandwidth, and supply conditions.
For PCB implementation, use the 16-pin PDIP footprint and route the digital control signals to minimize switching noise coupling into sensitive analog nodes. Decoupling capacitors should be placed close to the supply and ground pins, while switched analog traces should be kept short and away from control clocks. Confirm absolute maximum ratings, logic thresholds, and off-state isolation before finalizing the design.
This product page combines manufacturer specifications, package details, application guidance, and same-footprint replacement information to support faster component evaluation. It also highlights the principal trade-offs engineers should assess: on-resistance variation, switching speed, logic compatibility, power dissipation, and the mechanical constraints of a through-hole PDIP package.
直接替换替代料： DG412DJ+ ——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： DG412DJ+ （相同外形与封装尺寸） ——差异在于 Package, Switch Configuration.
DG412DJ-E3
✅ 直接替换联系询价
查看数据手册 →DG412DJZ
✅ 直接替换📋 参考替代料（不在目录中）
DG412DVZ
✅ 直接替换📋 参考替代料（不在目录中）
DG412DYZ
✅ 直接替换📋 参考替代料（不在目录中）
DG412DJ-E3
✅ 直接替换联系询价
查看数据手册 →DG412DJ+ 最大额定值与电气特性
| Number of Switches | 4 circuits |
| Switch Configuration | 4 independent SPST |
| Signal-to-Channel Ratio | 1:1 |
| Maximum Supply Voltage | 44 V |
| Analog Signal Range | 15 V |
| On-Resistance | 45 Ω |
| On-Resistance Matching Between Switches | 3 Ω maximum |
| On-Resistance Flatness Over Signal Range | 4 Ω maximum |
| Turn-On Time | 110 ns |
| Power Dissipation | 0.35 mW |
| Digital Input Compatibility | TTL and CMOS compatible |
| Supply Configuration | Single supply |
| Switch Type | CMOS analog switch |
| 封装 | PDIP-16, 0.3 inch |
| 安装类型 | Through-hole |
| Manufacturer Designation | DG412DJ+ |
DG412DJ+ pdip-16, 0.3 inch 引脚配置指南
DG412DJ+（pdip-16, 0.3 inch 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： DG412DJ+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DG412DJ+ 适用于 6 应用s: Multiplexed Sensor Acquisition, Audio Signal Routing, Automated Test Equipment, Data Acquisition Systems, Communication Signal Isolation, Industrial Control Signal Routing.
Multiplexed Sensor Acquisition
The DG412DJ+ can select among multiple sensor signals through its four independent SPST channels, reducing the number of external routing components in a measurement system. Its 110 ns turn-on time supports comparatively fast channel changes, while the 45Ω on-resistance must be included when calculating sensor attenuation with a finite source impedance. The 15 V analog signal range covers many low-voltage sensor outputs, and single-supply operation simplifies common 5 V or 12 V acquisition designs.
推荐
Audio Signal Routing
The DG412DJ+ is suitable for routing a selected audio or control signal through one of four independent channels without introducing the mechanical wear of a relay. The 15 V analog signal range covers common consumer and industrial audio levels, and the 110 ns turn-on time is much faster than typical electromechanical switching. The principal design consideration is the 45Ω on-resistance, which can create signal loss when driving a low-impedance load and should be included in the gain-budget calculation.
推荐
Automated Test Equipment
The DG412DJ+ can isolate and connect test channels in automated measurement systems, where TTL- and CMOS-compatible controls make it straightforward to coordinate with digital test controllers. Four independent switches provide separate routing paths on one 16-pin DIP footprint. Before implementation, verify off-state leakage, channel isolation, charge injection, and switching transients against the accuracy and timing requirements of the tester.
推荐
Data Acquisition Systems
In a data acquisition front end, the DG412DJ+ can connect several conditioned inputs to a shared converter or measurement channel. Its single-supply operation and TTL-compatible controls fit compact embedded systems, and the four-channel architecture helps minimize routing complexity. The 45Ω on-resistance can affect high-impedance acquisition networks more than low-impedance loads, while charge injection and off-state leakage become increasingly important as measurement resolution rises.
推荐
Communication Signal Isolation
The DG412DJ+ can isolate or reconnect communication paths within a controlled test or interface assembly, with a 15 V analog signal range and a 44 V maximum supply rating. The four independent SPST channels permit separate transmit, receive, or auxiliary routes. Designers should check the off-state isolation, leakage, bandwidth, and transient behavior at the actual signal frequency because the basic switch function alone does not guarantee high-frequency performance.
推荐
Industrial Control Signal Routing
The DG412DJ+ can route control or diagnostic signals in industrial equipment where a microcontroller needs to connect and disconnect several circuit paths. TTL- and CMOS-compatible inputs support common digital controllers, while the 0.35 mW characterized power dissipation limits switching power. Robust industrial use still requires grounding and protection planning around the 44 V maximum supply rating, especially when long wiring or inductive loads can introduce supply and signal transients.
推荐
推荐产品汇总
工程参考数据： DG412DJ+ ——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 | DG412DJ | DG412DJZ | DG412DVZ | DG412DYZ | DG412DJ-E3 |
|---|---|---|---|---|---|---|
| Package | PDIP-16, 0.3 inch | PDIP-16, 0.3 inch | PDIP-16, 0.3 inch | PDIP-16, 0.3 inch | PDIP-16, 0.3 inch | PDIP-16, 0.3 inch |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Vishay Intertechnology |
| Number of Circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 channels |
| Switch Configuration | 4 independent SPST, 1:1 | 4 independent SPST, 1:1 | 4 independent SPST | 4 independent SPST | 4 independent SPST | 4 independent SPST |
| Maximum Supply Voltage | 44 V | 44 V | 44 V | 44 V | 44 V | 44 V |
| Analog Signal Range | 15 V | 15 V | 15 V | 15 V | 15 V | 15 V |
| Digital Input Compatibility | TTL and CMOS compatible | TTL and CMOS compatible | TTL and CMOS compatible | TTL and CMOS compatible | TTL and CMOS compatible | TTL and CMOS compatible |
关键差异点
- Four independent SPST channels in one 16-pin package （对比 DG413DJ)
- Fast 110 ns turn-on behavior （对比 DG412DJ-E3)
- Single-supply operation with TTL and CMOS-compatible controls （对比 DG412DVZ)
设计说明
Include the 45Ω on-resistance in the signal-path attenuation calculation, especially when the source impedance is comparable to or higher than 45Ω. For a resistive source and load, the divider ratio is RL divided by the sum of the source resistance, 45Ω switch resistance, and load resistance. Also evaluate charge injection and off-state leakage when the selected switch configuration is used for precision sampling.
Place the bypass capacitor immediately between the supply and ground pins to minimize supply-loop inductance. Keep the four analog paths short, and place control traces away from sensitive switched nodes because fast transitions can capacitively couple into the signal lines. Use a solid ground reference and avoid routing unrelated high-current or switching-clock traces beneath the analog signal paths.
Do not treat the 44 V maximum supply rating as the recommended operating voltage or assume that every DG412 suffix has identical temperature and ordering specifications. Confirm the exact part number, pin configuration, logic thresholds, leakage, isolation, and operating-temperature range. A same-package replacement also requires the same switch topology; an SPDT or dual-SPST device is not interchangeable with four independent SPST channels.
合规信息
The manufacturer lists the DG412 family as production, but no specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified for the DG412DJ+ ordering code.
