DG405CJ+ - Dual 45Ω DPST Analog Switch | Maxim Integrated
MPN: DG405CJ+ ✓ نشطDG405CJ+ نظرة عامة
An analog switch is an integrated circuit that connects or disconnects signal paths under digital control. The DPST configuration provides one normally open connection per switch, while the dual architecture controls two independent circuits from a shared package. As a CMOS analog switch, the DG405CJ+ combines low-power operation with bidirectional signal handling and compact integration. It belongs to the broader interface IC hierarchy, where analog switches and multiplexers route external signals into precision measurement and signal-processing systems.
The redesigned DG405 family includes guaranteed matching between the two switches of 2 Ω maximum and guaranteed on-resistance flatness over the signal range of 3 Ω maximum. These matching characteristics are important when two channels are treated as differential or when signal-path resistance must remain consistent across operating conditions. The DG405CJ+ also supports a 45 Ω nominal on-resistance and normally open switch behavior for applications requiring the default path to be disconnected.
Its high-speed CMOS implementation is intended for signal routing where transition time and resistance matching affect measurement accuracy. Because the device uses a bipolar CMOS process, it combines fast switching behavior with controlled off-state characteristics. Signal integrity still depends on the source and load impedance, trace geometry, supply bypassing, and whether the selected switch architecture supports break-before-make operation where required.
Typical uses include precision test-and-measurement front ends, oscilloscope and communications test paths, data-acquisition systems, sample-and-hold circuits, and industrial analog multiplexing. The two switch sections can support paired routing, differential measurements, or independent channel selection. Its 16-pin PDIP format is particularly useful for legacy instrumentation, prototype boards, educational platforms, and through-hole assembly processes.
For a new PCB, place the DG405CJ+ close to the signal source and destination to minimize trace capacitance and resistance. Keep analog routing away from switching-power nodes, provide a local bypass capacitor near the supply pin, and use a ground plane that supports low-impedance return current. Verify the actual control truth table, break-before-make behavior, supply limits, and maximum signal swing in the manufacturer datasheet before finalizing the layout.
This product page combines package, function, matching, and application details with practical selection guidance for engineers comparing the DG405CJ+ with related dual DPST switches. The key decision is not only package compatibility but also on-resistance, leakage, switching speed, control logic, signal range, and whether the replacement is qualified for the original operating conditions.
بدائل مباشرة لـ DG405CJ+ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
DG405CJ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
DG405C
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MAX305CPE+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX305CPE
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MAX306CPE+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
DG405CJ+ الحدود القصوى والخصائص الكهربائية
| Number of Circuits | 2 circuits |
| Multiplexer Configuration | 2:1 |
| Switch Architecture | DPST |
| On Resistance | 45 Ω |
| Technology | CMOS |
| Switch State | Normally open |
| العلبة | PDIP-16 |
| Package Body Width | 0.300 in (7.62 mm) |
| Number of Terminals | 16 terminals |
| نوع التركيب | Through hole |
| Surface Mount | No |
| Temperature Grade | Commercial |
| On-Resistance Matching Between Switches | 2 Ω maximum |
| On-Resistance Flatness Over Signal Range | 3 Ω maximum |
| Signal Type | Analog |
| Product Type | Dual high-speed analog switch |
دليل تكوين أطراف DG405CJ+ 0.300 in (7.62 mm)
تكوين الأطراف لـ DG405CJ+ (حزمة 0.300 in (7.62 mm)). يتم تعريف ترقيم الأطراف والوظائف ومخططات التوصيل في ورقة البيانات الفنية من الشركة المصنعة. راجعها للحصول على البصمة الدقيقة وإرشادات اللحام.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ DG405CJ+.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
DG405CJ+ مناسب لـ 6 التطبيقs: Precision Test and Measurement Front Ends, Data Acquisition Signal Multiplexing, Communications Signal Routing, Sample-and-Hold Signal Conditioning, Industrial Control and Monitoring, Educational and Legacy Through-Hole Prototyping.
Precision Test and Measurement Front Ends
The DG405CJ+ is suitable for instrument routing where two related analog paths must switch with low channel-to-channel resistance variation. Its dual DPST topology can connect a source, load, or reference to measurement circuitry, while the 45 Ω nominal on resistance and 2 Ω maximum matching support predictable signal behavior. Place the switch close to the measurement node and compare the signal bandwidth with the complete source impedance and trace capacitance. Verify the control truth table and maximum signal swing before finalizing the front-end layout.
موصى به
Data Acquisition Signal Multiplexing
The DG405CJ+ can route two analog channels into a data-acquisition chain using its dual 2:1 DPST architecture. The normally open configuration provides a defined disconnected state, while the 45 Ω on resistance must be included when calculating source loading and settling behavior. For multiplexed measurements, keep the device adjacent to the ADC input and provide a stable bypass connection to the supply pin. Confirm switching transients and control timing in the datasheet when accurate acquisition at short settling intervals is required.
موصى به
Communications Signal Routing
The DG405CJ+ can support analog routing in communications test equipment and signal-conditioning modules. Its high-speed CMOS construction is suited to paths that require fast control transitions, although source impedance, load capacitance, and PCB parasitics determine the practical bandwidth. Keep routing away from clocks and switching-power traces to reduce coupling into the switched node. Use a continuous ground reference and verify that the switched voltage remains within the device's rated signal range.
موصى به
Sample-and-Hold Signal Conditioning
The DG405CJ+ fits sample-and-hold and hold-path implementations because each normally open DPST section can disconnect a sampled node from the next stage. Its specified 2 Ω maximum switch matching and 3 Ω maximum on-resistance flatness help maintain consistency between paired switches. The 45 Ω series resistance can influence acquisition time and source loading, so account for it in the timing calculation. Keep sensitive nodes short and place return-path capacitance under control to reduce settling errors.
موصى به
Industrial Control and Monitoring
The DG405CJ+ can isolate and route process-monitoring signals in industrial control equipment while its dual architecture controls two paths from one package. Normally open operation is useful when a default state should prevent unwanted coupling between field wiring and measurement electronics. Add appropriate protection for external industrial wiring and verify isolation behavior in the complete circuit. The 16-pin through-hole package is also practical for legacy control boards, prototype fixtures, and mixed-assembly production lines.
موصى به
Educational and Legacy Through-Hole Prototyping
The 16-pin PDIP package makes the DG405CJ+ convenient for breadboards, educational analog-switch experiments, and legacy instrument prototypes. Its two independently controlled DPST sections allow students or engineers to compare paired signal paths without changing the board layout. The 45 Ω on resistance is acceptable for many low-frequency demonstration circuits but should not be ignored in high-impedance or wideband experiments. Follow the datasheet truth table and use a local bypass capacitor for clean switching behavior.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ DG405CJ+ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | DG405CJ | DG405C | MAX305CPE+ | MAX305CPE | MAX306CPE+ |
|---|---|---|---|---|---|---|
| Package | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Number of Circuits | 2 circuits | 2 circuits | 2 circuits | 2 circuits | 2 circuits | 2 circuits |
| Multiplexer Configuration | 2:1 | 2:1 | 2:1 | 2:1 | 2:1 | 2:1 |
| Switch Architecture | DPST | DPST | DPST | DPST | DPST | DPST |
| Technology | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
أبرز الفروقات
- Guaranteed resistance matching between paired switches (مقابلMAX305CPE+)
- Explicit on-resistance flatness over the signal range (مقابلMAX305CPE+)
- Same package and switching topology as the MAX305CPE+ (مقابلMAX305CPE+)
ملاحظات التصميم
Treat the 45 Ω on resistance as part of the complete signal-path impedance rather than as an isolated component value. Calculate the resulting divider with the source and load impedances, and account for switch capacitance when estimating settling time. Route the switched node with a short, continuous return path and avoid sharing sensitive analog traces with digital control or switching-power nodes.
Place the DG405CJ+ close to the connector, sensor, or acquisition node it routes, because long PCB traces can add resistance and capacitance that are significant beside a 45 Ω switch resistance. Keep the supply bypass capacitor close to the device supply pin and provide a low-impedance ground connection. For through-hole designs, preserve clearance around adjacent pins and follow the manufacturer package dimensions.
Do not assume that an equivalent DPST package has equivalent control logic. Verify the control truth table, normally open or normally closed behavior, switch-break timing, maximum signal voltage, and supply limits for each candidate. The DG405CJ+ offers guaranteed 2 Ω maximum matching between its two switches; choosing a different family for lower cost may sacrifice that channel consistency.
Decouple the analog switch supply locally and keep the bypass return close to the device ground pin. Confirm the allowable supply range and input logic levels in the manufacturer datasheet before connecting a controller. If control traces are long, use a suitable line receiver or Schmitt-trigger buffer to prevent unintended switching during board startup.
معلومات الامتثال
No specific RoHS, REACH, halogen-free, or conflict-minerals declaration is identified for DG405CJ+ in the cited product information. AEC-Q100 is not applicable to this commercial analog switch.
