DG309DY+ - 4-Channel SPST Analog Switch | Analog Devices
料号： DG309DY+ ✓ 量产中DG309DY+ 概述
An analog switch is an integrated semiconductor device that routes signals between an input terminal and an output terminal under digital control. The DG309DY+ belongs to the CMOS analog-switch hierarchy, which includes SPST, SPDT, and multiplexed switching products. Its four normally closed channels remain connected when the control input is inactive and disconnect when commanded, making the device useful for signal isolation, test-point routing, and channel selection.
Key features include four independent SPST channels, normally closed operation, low on-resistance, fast switching transitions, CMOS-compatible control inputs, and operation across both positive supply and dual-supply rails. The 100 Ω resistance shown in the distributor catalog and the 60 Ω channel resistance reported on the Analog Devices product page describe different aspects of the published device performance; consult the manufacturer datasheet for the exact test conditions and applicable limits before finalizing a high-impedance design.
The DG309DY+ uses CMOS construction to reduce input current and provide TTL-compatible control operation. Four channels in one package reduce board area compared with four discrete mechanical or relay-based switches. Because each switch has a finite on-resistance and off leakage, the selected switch must be checked against source impedance, capacitance, signal level, and the allowable insertion loss of the application.
Typical uses include battery-powered test equipment, data-acquisition systems, sample-and-hold isolation, analog signal multiplexing, industrial controllers, and communication equipment. Positive-only operation at 5 V to 30 V is useful when only one supply rail is available, while ±5 V to ±20 V operation supports bipolar signals that must pass through the switch without shifting to a single-ended reference domain.
For layout, keep input and output traces short, place the device close to the signal source, and avoid long unprotected routes adjacent to fast-switching nodes. Confirm the control-logic levels, supply sequencing, and absolute maximum ratings in the manufacturer datasheet before applying power.
This page organizes the DG309DY+ specifications, verified package details, application guidance, pin-compatible alternatives, and practical comparison points into one engineering-focused reference for analog-signal routing designs.
直接替换替代料： DG309DY+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX4711CSE+
✅ 直接替换📋 参考替代料（不在目录中）
MAX4511CSE+
✅ 直接替换📋 参考替代料（不在目录中）
MAX4511ESE+
✅ 直接替换📋 参考替代料（不在目录中）
ADG202AKRZ
✅ 直接替换📋 参考替代料（不在目录中）
DG309DY
✅ 直接替换📋 参考替代料（不在目录中）
DG309DY+ 最大额定值与电气特性
| Number of Circuits | 4 circuits |
| Switch Configuration | 1:1 SPST |
| Switch State | Normally closed (NC) |
| Catalog On-Resistance | 100 ohm |
| Manufacturer Channel On-Resistance | 60 ohm |
| Positive Supply Voltage Range | 5 V to 30 V |
| Dual Supply Voltage Range | +/-5 V to +/-20 V |
| Turn-On Time | Less than 120 ns |
| Turn-Off Time | Less than 90 ns |
| Logic Technology | CMOS |
| Control Input Compatibility | TTL-compatible |
| 封装 | 16-pin NSOIC |
| 安装类型 | Surface mount |
DG309DY+ 16-pin nsoic 引脚配置指南
DG309DY+（16-pin nsoic 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： DG309DY+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DG309DY+ 适用于 6 应用s: Battery-Powered Test and Measurement Equipment, Bipolar Data-Acquisition Systems, Analog Signal Multiplexing, Industrial Control Signal Routing, Sample-and-Hold Isolation, Communication and Interface Equipment.
Battery-Powered Test and Measurement Equipment
The DG309DY+ fits portable instruments that require multiple signal paths to be connected or isolated under digital control. Its four normally closed channels provide a defined connected state before control action, while turn-on time below 120 ns and turn-off time below 90 ns support fast test sequencing. The 16-pin NSOIC package also simplifies routing compared with four discrete relays. Use the part when a 5 V to 30 V supply is available and the signal can be routed through a resistance of up to the selected manufacturer test condition.
推荐
Bipolar Data-Acquisition Systems
The DG309DY+ is appropriate for acquisition systems that must route positive and negative analog signals. Its dual-supply operating range of ±5 V to ±20 V supports bipolar signal paths, while the four SPST channels can isolate selected inputs during measurement or calibration. Channel on-resistance must be included in the source-loading calculation because it forms a divider with the source impedance. The fast transition specifications also help minimize settling time when the controller changes measurement connections.
推荐
Analog Signal Multiplexing
The four switch paths can support controlled routing among several analog sources when a one-to-one, normally closed architecture is acceptable. The 1:1 SPST configuration avoids introducing a second conducting path in the closed state and permits the control logic to isolate a channel when it is not selected. Designers should account for the published on-resistance, off-state leakage, source impedance, and load capacitance. The manufacturer's turn-on and turn-off limits below 120 ns and 90 ns provide useful timing boundaries for control and settling analysis.
推荐
Industrial Control Signal Routing
A four-channel analog switch can route control or feedback signals in an industrial controller when the system requires deterministic default connectivity. The DG309DY+ accepts a 5 V to 30 V positive supply, and its CMOS-compatible inputs simplify interfacing with digital control circuitry. Its normally closed behavior can maintain a path during controller reset, which is useful only if that continuity is intentional. Validate isolation behavior, control thresholds, and supply tolerances against the manufacturer datasheet before using the device in a safety-critical control path.
推荐
Sample-and-Hold Isolation
The DG309DY+ can isolate a sampling node from a source during switching transitions, reducing unintended charge injection into downstream circuitry. Its four normally closed channels allow several nodes to be handled from one package, while fast switching limits the duration of the transition. The benefit depends on using adequate source and load impedances and keeping PCB traces short. Engineers should evaluate on-resistance, leakage, capacitance, and the complete settling waveform rather than relying only on the sub-120 ns and sub-90 ns timing limits.
推荐
Communication and Interface Equipment
The DG309DY+ can route low- and moderate-level analog signals in communication interfaces that need programmable isolation or channel selection. The 1:1 configuration supports direct signal routing, and the SOIC package permits conventional surface-mount assembly. At higher signal frequencies, verify the switch's off-state capacitance, on-resistance flatness, and channel isolation rather than assuming that the transition-time specifications alone determine bandwidth. Keep control traces away from sensitive analog routes and use a stable supply reference to minimize switching-related disturbances.
推荐
推荐产品汇总
工程参考数据： DG309DY+ ——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 | MAX4711CSE+ | MAX4511CSE+ | MAX4511ESE+ | ADG202AKRZ | DG309DY |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices | Vishay Intertechnology |
| Package | 16-pin NSOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
关键差异点
- Four normally closed channels in one 16-pin SOIC package （对比 MAX4711CSE+)
- Negative-rail signal support （对比 DG309DY)
- Lower stated catalog on-resistance （对比 DG309DY)
设计说明
Confirm the default conduction state before assigning the control function. The DG309DY+ is normally closed, so each signal path conducts before the controller changes the switch state. If a powered system must present an open path during reset, the normally open DG308A may fit the intended fail-safe behavior better. A wrong assumption here can create unintended signal coupling or incorrect test results.
Include the on-resistance in the source-loading calculation. For the 100 ohm catalog value, a source resistance of 1 kilohm produces an ideal unloaded output ratio of 100 / (1000 + 100), or 91 percent. Actual results also depend on the load, switch capacitance, leakage, and frequency. Use the manufacturer test conditions to select the appropriate resistance value for the design.
Keep the analog signal pins, control inputs, and bypass connections short. Route sensitive input and output traces away from digital control paths and other switching nodes to limit capacitive coupling. The SOIC footprint is convenient for conventional surface-mount assembly, but its long leads are not ideal for very high-frequency signals. Match trace geometry to the source and load impedances when signal rise times are short.
Use only the supply combinations listed in the manufacturer datasheet and ensure the control-pin voltage remains valid during power-up and power-down. The DG309DY+ can operate from 5 V to 30 V or from ±5 V to ±20 V, but those ranges should not be treated as interchangeable for every control-state combination. Check the absolute maximum ratings and input thresholds before releasing the device to production.
合规信息
No explicit compliance declarations are listed in the referenced product information. The DG309 is an active analog interface IC and is not presented as an automotive-qualified device.
