DG409CY+ - Dual 4:1 CMOS Analog Multiplexer | Analog Devices
料号： DG409CY+ ✓ 量产中DG409CY+ 概述
An analog multiplexer is a semiconductor switching device that connects one of several analog inputs to a common output. A dual 4:1 configuration contains two independently addressed 4:1 sections, allowing one package to route two sets of four signal sources. In a larger signal-chain hierarchy, the DG409CY+ is a CMOS analog switch, an analog multiplexer, an interface IC, and ultimately a semiconductor used to route signals among sensors, converters, amplifiers, and test equipment.
The device operates bidirectionally, so selected channels can carry signals toward the common output or from the output toward a selected input. Its 100 ohm on-resistance supports the routing of moderate-impedance analog signals. The manufacturer also specifies maximum charge injection of 15 pC and improved matching between channels, which are important considerations when switching sampled signals, acquisition channels, or precision control lines.
The DG409CY+ is identified as a commercial-temperature 0 °C to +70 °C device in a 16-SOIC package. Typical uses include audio-signal routing, communication systems, data acquisition, guidance and control systems, sample-and-hold circuits, and test equipment. Its two multiplexers can reduce the number of external analog switches required when a board must select among multiple sources.
PCB design should preserve the exact pin assignment and routing geometry associated with the selected package variant. Because switching resistance, charge injection, off-state behavior, supply requirements, and control logic determine real-world performance, compare the complete manufacturer data sheet before using the device with high-impedance sources, high-speed sampling systems, or precision measurement circuits.
This page consolidates the identified configuration, package, resistance, matching, flatness, charge-injection, temperature, and application characteristics into an engineering-oriented selection guide. It also documents the verified pin-compatible DG409DY+T option and distinguishes device functionality from packaging-only order codes so that design decisions are based on electrical and environmental requirements.
直接替换替代料： DG409CY+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
DG409DY+T
✅ 直接替换📋 参考替代料（不在目录中）
DG409CY+ 规格参数
| Multiplexer Configuration | Dual 4:1 |
| Number of Circuits | 2 circuits |
| Total Channels | 8 channels |
| On-Resistance | 100 ohm |
| Channel Matching | 8 ohm maximum |
| Signal Flatness | 9 ohm maximum |
| Charge Injection | 15 pC maximum |
| Signal Direction | Bidirectional |
| Technology | CMOS |
| 工作温度 | 0 °C to +70 °C |
| 封装 | 16-SOIC |
| 引脚数量 | 16 pins |
| 安装类型 | Surface mount |
| Data Sheet Revision | Revision 4 |
DG409CY+ 16-soic 引脚配置指南
DG409CY+（16-soic 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： DG409CY+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DG409CY+ 适用于 6 应用s: Audio Signal Routing, Data Acquisition Systems, Sample-and-Hold Circuitry, Communication Equipment, Guidance and Control Systems, Test and Measurement Equipment.
Audio Signal Routing
The DG409CY+ is suitable for selecting among four audio-related sources in each of two independent switching sections. Its bidirectional 4:1 organization allows a common output to connect to one selected channel, while the second multiplexer can perform another routing function. The 100 ohm on-resistance, 8 ohm maximum channel matching, and 9 ohm maximum flatness help preserve amplitude consistency across choices, while the 15 pC maximum charge injection must be evaluated against the audio path's transient-response requirements. The Maxim DG409 documentation specifically identifies audio-signal routing as an application for this family.
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Data Acquisition Systems
The DG409CY+ can reduce the number of connections required in a data-acquisition front end by selecting among four inputs in each of two circuit groups. Its dual 4:1 architecture supports compact routing of sensor outputs, conditioned analog signals, or reference channels before conversion. Matching of 8 ohms maximum and flatness of 9 ohms maximum limit channel-to-channel variation, but the acquisition system should still account for the device's 100 ohm on-resistance, source impedance, switching transients, and the 15 pC maximum charge injection when specifying resolution and settling time.
推荐
Sample-and-Hold Circuitry
The DG409CY+ is applicable where multiple sampled signals must be selected before a shared sample-and-hold stage. Each 4:1 section can place one of four sources onto its common terminal, and the bidirectional channels allow the switching topology to be adapted to the surrounding circuit. Charge injection becomes a central design constraint in this application: the manufacturer's maximum of 15 pC produces a switching transient that must remain below the converter's allowable input error. Pair this requirement with the 100 ohm on-resistance and source-impedance calculations for the selected channel.
推荐
Communication Equipment
The DG409CY+ can route analog communication signals when a system needs to choose among several receiver, test, or interface paths. Its two independent 4:1 sections provide eight channels in one 16-SOIC package, which can simplify routing around shared converter and measurement stages. Bidirectional operation supports signal paths that must switch in either direction. The 8 ohm maximum channel matching and 9 ohm maximum flatness help limit gain variation between selections, although the final communications architecture must also account for source impedance, bandwidth, charge injection, and control-signal timing.
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Guidance and Control Systems
The dual 4:1 organization of the DG409CY+ supports control systems that must select among several analog command or feedback sources. Two switching sections can operate on related control channels while preserving independent addressing, and the 16-SOIC package keeps the routing network compact. Channel matching of 8 ohms maximum and flatness of 9 ohms maximum help reduce variation introduced by the multiplexer. For closed-loop control applications, evaluate the 15 pC maximum charge injection, switching dynamics, and the effect of 100 ohm on-resistance against the controller's input and drive specifications.
推荐
Test and Measurement Equipment
The DG409CY+ is well suited to test systems that route several measurement inputs to a shared instrument or acquisition channel. Two independent 4:1 sections can select among eight related signals, reducing the number of discrete relays or switches required near the measurement front end. The specified 8 ohm maximum matching and 9 ohm maximum flatness support repeatable channel selection, while bidirectional operation permits flexible signal-path arrangement. Accuracy still depends on total source impedance, leakage, switching transients, and the maximum 15 pC charge injection for the actual instrument configuration.
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推荐产品汇总
工程参考数据： DG409CY+ ——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 | DG409DY+T |
|---|---|---|
| Package | 16-SOIC | 16-SOIC |
| Brand | Analog Devices | Analog Devices |
| Multiplexer Configuration | Dual 4:1 | Dual 4:1 |
| Number of Circuits | 2 circuits | 2 circuits |
| On-Resistance | 100 ohm | 100 ohm |
| Channel Matching | 8 ohm maximum | 8 ohm maximum |
| Signal Flatness | 9 ohm maximum | 9 ohm maximum |
| Charge Injection | 15 pC maximum | 15 pC maximum |
| Operating Temperature | 0 °C to +70 °C | Extended temperature range |
关键差异点
- Commercial-temperature DG409 option （对比 DG409DY+T)
- Dual 4:1 routing in one package （对比 DG409DY+T)
- Guaranteed channel consistency （对比 DG409DY+T)
设计说明
Do not treat the 100 ohm on-resistance as the complete source impedance seen by the selected signal. The effective impedance includes the driving source, the switch resistance, input leakage, and the load presented by the following stage. In high-impedance measurement circuits, 100 ohm may be insignificant; in low-impedance drive paths, it may cause unacceptable attenuation. Calculate the worst-case divider formed by source resistance, on-resistance, and load impedance before finalizing the multiplexer selection.
Use the manufacturer-specified maximum charge injection of 15 pC as the starting point for settling-error analysis. Estimated: for a 1 nF holding capacitor, 15 pC corresponds to an instantaneous voltage step of 15 mV using ΔV = ΔQ/C. This is an arithmetic estimate, not a guaranteed application performance figure. The actual error also depends on switch topology, control timing, leakage, source impedance, and the acquisition circuit, so verify the complete behavior in the intended signal path.
Place the DG409CY+ close to the signals it routes and keep each selected channel's return path continuous. Use a ground-plane reference, minimize loops around high-impedance nodes, and isolate control inputs from sensitive analog traces where practical. Because both multiplexer sections share one package and supply system, poor grounding or control-coupling can affect channels that are not actively selected. Validate the layout with the complete pin arrangement and switching sequence shown in the manufacturer data sheet.
合规信息
The commercial 0 °C to +70 °C operating range does not establish AEC-Q100 qualification. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the manufacturer product documentation or declaration.
