DG423DJ+ - Triple SPDT CMOS Analog Switch | Analog Devices
料号： DG423DJ+ ✗ 停产DG423DJ+ 概述
A CMOS analog switch is a semiconductor device that routes electrical signals between circuit nodes under digital control. The DG423DJ+ belongs to the analog switch and switch-and-multiplexer hierarchy, where it functions as a low-power signal-routing interface between sensors, measurement circuits, amplifiers, converters, and digital control logic. Its latched control interface allows the selected signal path to remain stable while reducing repeated control activity.
The DG423 family provides guaranteed on-resistance matching of 3 ohm maximum and on-resistance flatness of 4 ohm maximum. These characteristics are important when several channels must present similar resistance to downstream circuitry. Maximum charge injection is 15 pC, helping limit timing disturbance when control signals change the selected path. The switch also provides ESD tolerance of 2000 V minimum under Method 3015.7.
The three SPDT channels give the device useful routing flexibility for test-point selection, signal-path switching, and sampling networks. Each channel can connect one common terminal to either of two selectable terminals, allowing a compact design to implement muxing, polarity selection, or source selection. Because the DG423DJ+ is packaged in a 16-pin DIP, it is also appropriate for prototypes, educational equipment, and through-hole industrial assemblies.
Typical uses include multimeter and oscilloscope input routing, automated test systems, instrumentation signal conditioning, battery-powered measurement equipment, and industrial control interfaces. Latched operation can reduce control-bus activity in systems where the selected channel must persist between updates, although the exact latch and enable behavior should be confirmed in the manufacturer datasheet before final sequencing logic is designed.
For new PCB layouts, the principal trade-off is package footprint rather than switching performance: the 16-pin DIP is easy to prototype but occupies more board area than a surface-mount alternative. Confirm signal levels, supply voltage, logic thresholds, switch logic, and absolute maximum ratings against the manufacturer datasheet before connecting external signals.
This page consolidates the documented electrical characteristics, practical routing applications, drop-in comparison information, and PCB implementation guidance needed to evaluate the DG423DJ+ during component selection.
直接替换替代料： DG423DJ+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
DG423DJ
✅ 直接替换📋 参考替代料（不在目录中）
DG423DJ
✅ 直接替换📋 参考替代料（不在目录中）
DG423DJ+ 最大额定值与电气特性
| Switch Configuration | 3 x SPDT |
| On-Resistance Matching | 3 ohm maximum between switches |
| On-Resistance Flatness | 4 ohm maximum over signal range |
| Typical On-Resistance | 20 ohm |
| Charge Injection | 15 pC maximum |
| ESD Tolerance | 2000 V minimum under Method 3015.7 |
| Number of Terminals | 16 terminals |
| Package Code | DIP |
| Package Shape | Rectangular |
| 安装类型 | Through hole |
| Temperature Grade | Industrial |
| Logic Type | CMOS analog switch with latches |
| Technology | Low-power CMOS |
DG423DJ+ rectangular 引脚配置指南
DG423DJ+（rectangular 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： DG423DJ+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DG423DJ+ 适用于 6 应用s: Automated Test Signal Routing, Multimeter Input Switching, Oscilloscope Probe Multiplexing, Industrial Sensor Interface, Battery-Powered Measurement Equipment, Sample-and-Hold Signal Selection.
Automated Test Signal Routing
The DG423DJ+ is appropriate for routing one of several measured signals into a shared instrument or test channel. Its three SPDT sections provide independent selection paths, while the documented 3 ohm maximum matching between switches helps maintain more consistent channel behavior than unmatched discrete relays. The 16-pin DIP format also simplifies automated-test and fixture prototypes requiring through-hole serviceability. Before finalizing the fixture, verify leakage, bandwidth, logic thresholds, and allowable signal voltage against the manufacturer datasheet.
推荐
Multimeter Input Switching
The three SPDT channels in the DG423DJ+ can select different test inputs for a shared measurement amplifier or analog-to-converter path. Its 20 ohm typical on-resistance provides a defined series-resistance starting point, and on-resistance matching of 3 ohm maximum helps reduce channel-to-channel variation. This is useful in compact digital multimeters and handheld measurement products where multiple sensing points must reach one measurement chain. Final signal limits and off-state behavior must be checked for the selected operating ranges.
推荐
Oscilloscope Probe Multiplexing
DG423DJ+ can connect multiple probe nodes to a common oscilloscope channel through its three SPDT sections. Matching of 3 ohm maximum is valuable when the system compares signals from different points, while the 4 ohm maximum flatness specification helps characterize resistance variation over the signal range. The device can also route complementary test points without adding separate relays. Because probe bandwidth can be affected by switch capacitance and on-resistance, confirm the complete frequency-response limits before using the switch in high-bandwidth probes.
推荐
Industrial Sensor Interface
The DG423DJ+ is suitable for selecting among several industrial sensor signals before they reach a controller or amplifier. Its three SPDT channels provide compact source multiplexing, while the guaranteed 3 ohm maximum on-resistance matching improves consistency across selected inputs. The latched control concept is useful in supervisory systems that need to retain a selected channel without continuously changing the routing state. Industrial use still requires checking the operating temperature range, isolation strategy, surge exposure, and common-mode limits.
推荐
Battery-Powered Measurement Equipment
Low-power CMOS construction makes the DG423DJ+ relevant to portable measurement equipment that routes several low-frequency analog signals. The device combines three SPDT sections with on-resistance matching of 3 ohm maximum and flatness of 4 ohm maximum, allowing a shared amplifier or converter to receive selected inputs with controlled channel variation. For battery designs, confirm the complete supply-current behavior across static and switching states, then verify that signal polarity and voltage remain within the absolute maximum limits.
推荐
Sample-and-Hold Signal Selection
DG423DJ+ can select one of several analog nodes for a downstream sampling circuit using its three SPDT channels. Charge injection of 15 pC maximum provides a documented basis for assessing control-transition disturbance, while on-resistance matching of 3 ohm maximum supports repeatable channel selection. The DIP package is well suited to laboratory instruments and educational prototypes where replacing or reconfiguring the routing network is important. Sampling accuracy must also be evaluated against leakage, capacitance, settling time, and source impedance.
推荐
推荐产品汇总
工程参考数据： DG423DJ+ ——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 | DG423DJ | DG423DJ |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Vishay Siliconix |
| Package | 16-pin DIP | 16-pin DIP | 16-pin DIP |
| Switch Configuration | 3 x SPDT | 3 x SPDT | 3 x SPDT |
| Mounting Type | Through hole | Through hole | Through hole |
关键差异点
- Three independently selectable SPDT channels in one package （对比 DG421DJ)
- Guaranteed resistance matching between switched paths （对比 DG425DJ)
- Lower channel count than the DG425 while retaining the same family architecture （对比 DG425DJ)
设计说明
Assign every PCB track from the manufacturer pin-description table rather than from the 16-pin DIP outline alone. The DG423 family uses three SPDT sections, and the common, selectable, control, latch, and supply functions must be grouped carefully. Keep analog switch traces away from fast digital clock and switching-node routes, and provide a low-impedance ground reference appropriate to the measurement circuit.
Include switch on-resistance, capacitance, leakage, and off-state impedance in settling-time analysis rather than considering the DG423DJ+ as an ideal zero-resistance router. The documented 20 ohm typical on-resistance and 4 ohm maximum flatness provide useful starting points. For source impedances near the switch resistance or for high-gain analog nodes, add the switch contribution directly to the amplifier input network and verify the complete frequency response.
Do not apply analog signals above the manufacturer limits, and do not assume that equal switch resistance guarantees equal injected charge at every control transition. Charge injection is specified at 15 pC maximum, but its effect depends on source impedance, control-edge speed, and downstream capacitance. Validate the latch and enable truth table in firmware and lab measurements before committing to a production test sequence.
The DG423DJ+ is a low-power CMOS switch in a 16-pin through-hole DIP, so its principal thermal concern is the power dissipated in the on-state resistance rather than package heat spreading. Calculate worst-case conduction loss with I²R using the highest expected continuous current and applicable on-resistance. Confirm the operating ambient temperature and derating requirements against the manufacturer limits before defining the current rating for the design.
合规信息
No definitive RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified. AEC-Q100 is not applicable to this industrial analog switch.
