DG417CJ+ - 35 Ohm SPST CMOS Analog Switch | Maxim
MPN: DG417CJ+ ✓ AktifDG417CJ+ Genel Bakış
An analog switch is a semiconductor device that routes an analog voltage or current between circuit nodes under digital control. In system terms, an analog switch belongs to the interface IC category, where it connects to multiplexers, sample-and-hold circuits, and signal-conditioning networks. Unlike a mechanical relay, the DG417CJ+ changes state electronically without moving mechanical contacts, allowing compact, reliable, and fast signal-path control.
The DG417CJ+ offers a rated on-resistance of 35 ohm, low charge injection, low power consumption, and an ESD tolerance of 2000 V. Its precision monolithic CMOS construction supports consistent switching behavior over the usable signal range. The switch operates equally well in either signal direction, making it useful where the source and destination roles can reverse during a measurement or test sequence.
The device is available in a commercial temperature grade, and the 8-pin PDIP package is suitable for through-hole assembly, prototype boards, educational laboratories, and legacy industrial equipment. The DG417C version is the leaded commercial-temperature option; the '+' ordering suffix identifies the modern ordering designation used for the same device family. A companion DG417DJ and related MAX4504 devices use comparable 8-pin DIP configurations, but control polarity, voltage limits, and operating-temperature ranges must be confirmed before substitution.
Typical uses include routing sensors to a measurement amplifier, selecting inputs in automated test systems, switching references in laboratory equipment, and controlling analog signal paths in communication hardware. Because the device presents about 35 ohm in the closed state, it is best suited to moderate-impedance analog nodes rather than high-current power switching or low-impedance precision-adcitor front ends where switch resistance would degrade accuracy.
For layout, keep the analog signal traces short and connect the supply pins to a low-impedance ground plane. Place any bypass capacitor close to the device, avoid routing control signals beneath sensitive analog nets, and confirm that the switched voltage remains within the datasheet limits. The maximum and recommended operating voltages, supply current, leakage current, switching time, and temperature limits should be taken directly from the manufacturer datasheet for the selected part variant.
This page combines package, pin, application, and substitution information with practical PCB and signal-integrity guidance. It is intended to help engineers confirm whether the DG417CJ+ fits a legacy analog-routing design before ordering a new PCB.
Drop-in alternatifler için DG417CJ+ — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
MAX4504CPA
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
DG417DJ-E3
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
ADG417BNZ
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
DG417CJ+ Maksimum Değerlendirmeler & Elektriksel Özellikler
| Switch Type | Single-pole single-throw (SPST) |
| Number of Switches | 1 circuit |
| On-Resistance | 35 ohm |
| On-Resistance Matching Between Switches | 3 ohm maximum |
| On-Resistance Flatness Over Signal Range | 4 ohm maximum |
| Signal Direction | Bidirectional |
| Device Technology | Monolithic CMOS |
| Charge Injection | Low |
| ESD Tolerance | 2000 V |
| Power Consumption | Low |
| Temperature Grade | Commercial |
| Paket | 8-pin PDIP |
| Montaj Türü | Through-hole |
| Number of Terminals | 8 |
| Package Shape | Rectangular |
| Surface Mount | No |
DG417CJ+ Pin Yapısı
| Pin 1 | S1 — Switch terminal 1 |
| Pin 2 | D1 — Switch terminal 2 |
| Pin 3 | V+ — Positive supply |
| Pin 4 | V- — Ground or negative supply |
| Pin 5 | D2 — Switch terminal 3 |
| Pin 6 | S2 — Switch terminal 4 |
| Pin 7 | NC — Not connected |
| Pin 8 | ON — Logic control input |
Tipik Uygulamalar
DG417CJ+ için uygundur 6 uygulamas: Automated Test Equipment Signal Routing, Precision Measurement Front Ends, Laboratory Reference Selection, Sensor Multiplexing in Industrial Controls, Communication and Data-Acquisition Systems, Legacy Instrumentation and Educational Prototypes.
Automated Test Equipment Signal Routing
The DG417CJ+ is suitable for routing test nodes under sequencer control in automated test equipment. Its single SPST path, 35 ohm on-resistance, and bidirectional conduction let a controller connect a DUT or fixture signal to a measurement chain without mechanical switching delay. The DG417 family also provides low charge injection, which reduces unwanted transient movement when the control input changes state. For impedance-sensitive measurements, account for the 35 ohm series resistance in the error budget or select a lower-resistance switch. The 8-pin PDIP package also makes the part practical for legacy ATE fixtures and through-hole interface boards.
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Precision Measurement Front Ends
The DG417CJ+ can select a sensor, reference, or calibration signal before it reaches a measurement amplifier. Bidirectional conduction makes it practical where a source and an instrument must exchange roles during calibration. Low charge injection is valuable in high-impedance instrumentation because it limits the voltage step injected when the control input toggles. However, the 35 ohm on-resistance must be considered relative to the source impedance; if it introduces more than the allowable measurement error, choose a lower-resistance precision switch such as the ADG417BNZ.
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Laboratory Reference Selection
The DG417CJ+ allows a laboratory instrument to select among voltage references or calibration inputs with a logic-controlled analog path. Because the switch conducts equally well in either direction, it can also support bidirectional loop connections in bench instruments. Its monolithic CMOS design and specified on-resistance matching of 3 ohm maximum help keep channel behavior repeatable across signal levels. Keep the switched node impedance high enough that the 35 ohm path resistance does not obscure the reference accuracy, and place bypass capacitance close to the device to keep supply noise from modulating the analog signal.
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Sensor Multiplexing in Industrial Controls
The DG417CJ+ can implement a basic analog selection stage in industrial monitoring equipment, connecting one of several externally multiplexed sensor lines to a common amplifier or controller input. Its commercial-grade monolithic CMOS construction, low power consumption, and SPDT-family switching characteristics suit compact control boards. Because the 35 ohm on-resistance adds to the sensor impedance, choose amplifier biasing that avoids leakage errors and verify the sensor output range against the device voltage limits. The through-hole 8-pin PDIP package is particularly convenient for legacy control boards assembled with mixed through-hole and surface-mount components.
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Communication and Data-Acquisition Systems
The DG417CJ+ is useful for analog loopback, channel isolation, and signal-path selection in communication and data-acquisition equipment. Bidirectional operation allows the same switch to connect a source to a receiver or return a line toward a transmitter. Low charge injection limits transient coupling into adjacent high-impedance circuitry, while the 35 ohm on-resistance is acceptable for many moderate-impedance acquisition stages. Route the switched traces away from clocks and high-energy digital nets, and provide a stable local ground return so switching transients do not create errors in the acquisition channel.
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Legacy Instrumentation and Educational Prototypes
The 8-pin PDIP package makes the DG417CJ+ straightforward to install on prototype boards, educational instruments, and maintenance-designed analog control boards. The single SPST topology allows a technician or controller to connect, disconnect, or isolate a signal path with a logic command. Its bidirectional behavior and 35 ohm on-resistance suit general-purpose low-current routing rather than power distribution. When repairing an existing instrument, verify the control polarity and pin mapping against the original schematic because similarly packaged switch ICs may use different logic conventions or terminal assignments.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: DG417CJ+ — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | MAX4504CPA | DG417DJ-E3 | ADG417BNZ |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices |
| Package | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP |
| Switch Configuration | SPST, 1 circuit | SPST | SPST | SPST |
Ana Farklılayıcılar
- Established 8-pin leaded SPST implementation (karşılaştırma:ADG417BNZ)
- Documented precision matching within the DG417 family (karşılaştırma:MAX4504CPA)
- Low charge injection for controlled analog transitions (karşılaştırma:ADG417BNZ)
Tasarım Notları
Treat the 35 ohm on-resistance as part of the signal-path impedance. In a divider formed by the source impedance and switch resistance, the switch can introduce a measurable gain error even though it is bidirectional and low-injection. For high-impedance sensors, confirm that the leakage current and parasitic capacitance of the selected amplifier and switch remain small compared with the signal being measured.
Follow the 8-pin PDIP pin sequence and the standard DIP pin-1 notch when laying out the board. Keep the analog terminals close to their source and destination components, provide a continuous ground reference beneath the analog area, and place the device supply bypass capacitor near its supply pin. Separate the logic-control trace from sensitive analog nets to reduce capacitive switching injection.
Do not treat every SPST switch in an 8-pin DIP as an automatic replacement. Verify control polarity, supply voltage range, signal-level limits, and terminal naming against the original schematic. The MAX4504CPA is identified as a complete replacement in the comparison listing, but the DG417DJ-E3 and ADG417BNZ still require individual datasheet review before installation in safety-critical or high-voltage equipment.
Uyumluluk Bilgisi
The commercial-temperature DG417CJ+ is a conventional analog switch rather than an automotive-qualified product. No specific RoHS, REACH, lead-free, or halogen-free declaration was identified for this ordering code.