DG401CJ+ - Dual 45 Ohm SPST Analog Switch | Analog Devices
N.º de pieza: DG401CJ+ ✓ ActivoDG401CJ+ Descripción general
An analog switch is an integrated semiconductor device that routes a signal between circuit nodes under logic control. The DG401CJ+ belongs to the analog-switch and multiplexer category, where it sits above discrete MOSFET switches and below more complex multiplexing or switching systems. Each of its two channels can connect or disconnect one signal path, making the device suitable for sample-and-hold systems, test equipment, audio routing, and data-acquisition front ends.
Key electrical characteristics include a 45 Ω maximum on resistance and a 20 Ω typical value in the redesigned DG401 series. The manufacturer also specifies guaranteed on-resistance matching of 2 Ω maximum between switches and on-resistance flatness of 3 Ω maximum across the signal range. Charge injection is limited to 15 pC maximum, helping reduce switching glitches in precision measurement systems.
The DG401 series uses a CMOS-style analog-switch architecture that operates equally well in either signal direction. Two separately controlled switches provide independent routing for dual-channel or differential systems. The 75 ns switching-time figure published for the DG401 series supports high-speed sampling and measurement applications where the switch must settle rapidly after a control transition.
Typical uses include automated test equipment, sample-and-hold circuits, audio and video signal routing, analog measurement front ends, and instrumentation requiring two independently switched paths. The 16-pin PDIP package is suitable for through-hole prototyping, legacy industrial boards, and applications where a socketed or manually assembled package is preferred over a surface-mount option.
When designing around the DG401CJ+, treat the 45 Ω on resistance as part of the signal-path impedance budget and keep control-edge layout short to limit capacitive coupling. Because the device is a normally open switch, the signal path is disconnected until the corresponding logic input is asserted. Confirm the control polarity and timing against the manufacturer pin-description table before assigning PCB nets.
Alternativas directas para DG401CJ+ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con DG401CJ+ (mismo factor de forma y huella) — difiere en Charge Injection, Mounting Type, Package.
DG401CJ
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
DG401EJ+
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
DG401DJ+
✅ Sustitución directa ⚠️ Especificaciones sin verificarConsulte el precio
Ver hoja de datos →DG401DJ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
DG401CJ+ Valores máximos y características eléctricas
| Number of Switches | 2 circuits |
| Multiplexer Configuration | 1:1 |
| Switch Type | SPST (normally open) |
| On Resistance | 45 Ω maximum; 20 Ω typical |
| On-Resistance Matching Between Switches | 2 Ω maximum |
| On-Resistance Flatness | 3 Ω maximum |
| Charge Injection | 15 pC maximum |
| Switching Time | 75 ns |
| Rango de temperatura de funcionamiento | Commercial grade |
| Encapsulado | PDIP-16, 0.300 inch (7.62 mm) row spacing |
| Tipo de montaje | Through hole |
| Data Sheet Revision | Rev. 2 |
| Estado del ciclo de vida | Production |
Guía de configuración de pines de DG401CJ+ pdip-16, 0.300 inch (7.62 mm) row spacing
Configuración de pines para DG401CJ+ (encapsulado pdip-16, 0.300 inch (7.62 mm) row spacing). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para DG401CJ+.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
DG401CJ+ es adecuado para 6 aplicacións: Automated Test Equipment Signal Routing, Sample-and-Hold Acquisition Circuits, Audio and Video Signal Routing, Precision Instrumentation Front Ends, Dual-Channel Data Acquisition, Legacy Through-Hole Control Boards.
Automated Test Equipment Signal Routing
The DG401CJ+ is suited to automated test systems that must connect and isolate two measurement paths under sequencer control. Its two independent normally open channels allow a fixture to route a source, clamp, or return path without introducing additional crosstalk through a permanently closed switch. The 2 Ω maximum on-resistance matching and 3 Ω maximum flatness help keep the two paths electrically similar, while 75 ns switching time supports rapid test cycles. The 45 Ω maximum path resistance should be included in the source-impedance and accuracy budget when driving high-impedance detectors.
Recomendado
Sample-and-Hold Acquisition Circuits
A sample-and-hold front end benefits from the DG401CJ+ because each SPST channel can disconnect the hold capacitor from the source between acquisitions. The normally open configuration prevents continuous loading of the input while the circuit is not sampling. With 15 pC maximum charge injection and a 75 ns switching time, the device supports acquisition circuits that require a defined settling interval and limited control-induced transient. Capacitor selection should still account for the injected charge, source impedance, leakage, and acquisition time.
Recomendado
Audio and Video Signal Routing
The DG401CJ+ can route two low-frequency analog channels in audio, video, or communication equipment without introducing the broadband switching noise associated with mechanical relays. The 45 Ω maximum on resistance is manageable for many line-level or impedance-buffered paths, while guaranteed matching and flatness help maintain consistent channel behavior. The normally open switches remain isolated during idle periods. Use the manufacturer control-logic thresholds to interface directly with the supply levels used by the surrounding CMOS logic.
Recomendado
Precision Instrumentation Front Ends
The DG401CJ+ is appropriate for instrumentation that selects or isolates signals entering a precision measurement chain. Matching of 2 Ω maximum and on-resistance flatness of 3 Ω maximum reduce channel-dependent gain errors when the source impedance is low relative to 45 Ω. The low 15 pC maximum charge injection also limits control-induced steps at the input of sensitive amplifiers. For very high-impedance sources, verify leakage and off-state behavior against the complete operating-temperature range before finalizing the design.
Recomendado
Dual-Channel Data Acquisition
Two independent DG401CJ+ channels can support dual or differential acquisition when each switch is driven in the required sequence. The matched 45 Ω maximum on resistance helps preserve channel balance, and the 3 Ω maximum flatness specification limits signal-dependent resistance changes across the operating range. The device can also isolate an input during conversion to reduce interference between measurements. Sequencing the controls with the converter avoids overlapping acquisition and conversion periods and limits transient settling time at the input.
Recomendado
Legacy Through-Hole Control Boards
The 16-pin PDIP package makes the DG401CJ+ practical for legacy through-hole control boards, prototype fixtures, and manually assembled industrial interfaces that are not being converted to surface-mount assembly. Two SPST channels provide economical routing without requiring multiple single-switch packages. The through-hole form factor also eases inspection and rework during low-volume production. Because the package is not surface mount, mixed-technology boards need the appropriate plated-through-hole footprint and adequate spacing for axial or manual insertion.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DG401CJ+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DG401CJ | DG401EJ+ | DG401DJ+ | DG401DJ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Vishay Siliconix |
| Package | PDIP-16, through hole | PDIP-16, through hole | PDIP-16, through hole | PDIP-16, through hole | DIP-16, through hole |
| Number of Switches | 2 | 2 | 2 | 2 | 2 |
| Switch Configuration | Dual SPST, normally open | Dual SPST, normally open | Dual SPST, normally open | Dual SPST, normally open | Dual SPST |
| On Resistance | 45 Ω maximum; 20 Ω typical | 45 Ω class | 45 Ω class | 45 Ω class | 30 Ω |
| Switching Time | 75 ns | 75 ns | 75 ns | 75 ns | 75 ns |
Diferenciadores clave
- Guaranteed channel matching and flatness (frente a DG401DJ)
- Defined high-speed switching performance (frente a DG401DJ)
- Dual normally open routing in a through-hole package (frente a MAX301CPE+)
Notas de diseño
Treat the DG401CJ+ on resistance as part of the source impedance seen by the next stage. With a 45 Ω maximum path resistance, a high-gain amplifier can produce an input-referred error proportional to that resistance. Use the guaranteed 2 Ω maximum matching and 3 Ω maximum flatness figures when budgeting channel-to-channel gain error, and avoid driving the switch from a source whose impedance is too high for the intended measurement accuracy.
Do not substitute the SOIC-16 DG401DY+T without redesigning the PCB because it uses a surface-mount package rather than the DIP-16 footprint of the DG401CJ+. In addition, a comparator listing a similar function is not necessarily pin-compatible. Confirm the two signal pins, common terminals, control inputs, and logic polarity against the manufacturer pin-description table before releasing a replacement to production.
Keep the control traces short and route them away from sensitive analog inputs to reduce capacitive injection from the switching edges. Place the device close to the source and destination nodes so the 45 Ω maximum on resistance does not add appreciable trace resistance or inductance. Use a ground reference plane and decouple the device's supply pins according to the manufacturer application circuit, following the data sheet's recommended values.
The control inputs and supply pins determine the device's electrical operating limits, but those detailed limits are not stated on the product page. Before applying power, verify the supply range, input logic thresholds, absolute maximum ratings, and signal-node voltage limits in the Analog Devices DG401 data sheet. Do not infer these ratings from the 45 Ω on resistance or from a distributor category description.
Información de cumplimiento
A distributor listing associates the DG401CJ+ with RoHS, but it does not state a compliance status. The + suffix is associated with the manufacturer's lead-free ordering convention, while detailed declarations require confirmation from the manufacturer product documentation.
