DG423DJ+ - Triple SPDT CMOS Analog Switch | Analog Devices
MPN: DG423DJ+ ✗ Cuối đờiDG423DJ+ Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho DG423DJ+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
DG423DJ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DG423DJ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DG423DJ+ Tỷ lệ tối đa & tính chất điện
| 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 |
| Kiểu lắp đặt | Through hole |
| Temperature Grade | Industrial |
| Logic Type | CMOS analog switch with latches |
| Technology | Low-power CMOS |
Hướng dẫn cấu hình chân DG423DJ+ rectangular
Cấu hình chân cho DG423DJ+ (rectangular gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho DG423DJ+.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
DG423DJ+ phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho DG423DJ+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Three independently selectable SPDT channels in one package (vsDG421DJ)
- Guaranteed resistance matching between switched paths (vsDG425DJ)
- Lower channel count than the DG425 while retaining the same family architecture (vsDG425DJ)
Ghi chú thiết kế
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.
Thông tin tuân thủ
No definitive RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified. AEC-Q100 is not applicable to this industrial analog switch.
