MAX319CSA+ - Precision 35Ω CMOS SPDT Switch | Analog Devices
Teilenummer: MAX319CSA+ ✓ AktivMAX319CSA+ Übersicht
An analog switch is a semiconductor interface that routes an analog signal between circuit nodes under digital control. Unlike a relay, it operates electronically at low voltage and can switch signals rapidly without mechanical wear. The MAX319 belongs to the broader analog-switch hierarchy, which sits alongside multiplexers, demultiplexers, and interface ICs used to connect sensors, test equipment, measurement systems, and signal-processing electronics.
Key electrical characteristics include on-resistance below 20Ω typical and 35Ω maximum, guaranteed channel matching within 2Ω, and on-resistance variation of no more than 3Ω maximum across the analog signal range. Charge injection is low at 10pC, while power consumption is 35µW. These characteristics help preserve signal fidelity when the switch is used in measurement, control, or data-acquisition paths.
The MAX319 family uses an improved silicon-gate CMOS process and rail-to-rail analog signal handling capability associated with a 44V maximum breakdown voltage. Its precision configuration is useful when signal-source impedance, leakage, or switch resistance could otherwise influence the measurement result. The MAX319CSA+ ordering code identifies the 8-pin SOIC package and the manufacturer's standard production configuration.
Typical uses include battery-powered instrumentation, automated test equipment, analog measurement systems, signal-path routing, sample-and-hold circuits, and industrial control interfaces. Its low 35µW power consumption is particularly useful in portable equipment, while the 35Ω maximum on-resistance is suitable for moderate-impedance analog signals rather than ultra-low-impedance precision dividers.
When designing a circuit around the MAX319CSA+, account for the switch's on-resistance, leakage, charge injection, and off-state behavior when calculating signal attenuation and timing. Place the device close to sensitive signal paths, maintain adequate grounding, and use the manufacturer pin-description table when assigning PCB tracks. Verify the logic levels and control polarity against the actual device documentation before finalizing the layout.
This product page combines the manufacturer's device specifications with practical design guidance, package information, sourcing details, and a conservative drop-in assessment. It emphasizes verified distinctions between electrically similar devices so engineers can determine whether a replacement preserves both the board footprint and the required switch behavior.
Drop-in-Alternativen für MAX319CSA+ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
MAX319ESA+
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX319CSA+ Grenzwerte & elektrische Eigenschaften
| Switch Type | Single-pole double-throw (SPDT) |
| Number of Circuits | 1 circuit |
| Number of Switches | 2 switch paths |
| On-Resistance | <20Ω typical; 35Ω maximum |
| On-Resistance Matching | 2Ω maximum between channels |
| On-Resistance Variation | 3Ω maximum over the analog signal range |
| Charge Injection | 10pC |
| Power Consumption | 35µW |
| Electrostatic Discharge Withstand | ±2000V |
| Maximum Breakdown Voltage | 44V |
| Signal Handling | Rail-to-rail analog signal handling |
| Process Technology | Improved silicon-gate CMOS |
| Gehäuse | 8-pin SOIC |
| Montageart | Surface mount |
| Production Status | Production |
MAX319CSA+ 8-pin soic Pinbelegungsleitfaden
Pinbelegung für MAX319CSA+ (8-pin soic-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für MAX319CSA+.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
MAX319CSA+ ist geeignet für 6 Anwendungs: Battery-Powered Portable Measurement Systems, Automated Test Equipment Signal Routing, Analog Signal Multiplexing, Sample-and-Hold Signal Paths, Industrial Control Interface Routing, Precision Signal-Path Switching.
Battery-Powered Portable Measurement Systems
The MAX319CSA+ fits portable measurement systems where a low-power SPDT routing function is needed without adding mechanical switching components. Its 35µW power consumption reduces the load associated with signal routing, while on-resistance below 20Ω typical helps limit voltage attenuation in moderate-impedance sensor paths. The 10pC charge-injection figure is also useful when the selected switch participates in a sampled measurement. Designers should calculate the complete error budget from sensor impedance, leakage, switch resistance, control timing, and post-switch amplification. Use a local ground reference and route the sensitive analog node away from digital control traces to preserve measurement stability.
Empfohlen
Automated Test Equipment Signal Routing
The MAX319CSA+ is appropriate for automated test equipment that routes one source to either a normally open or normally closed destination. Its maximum on-resistance of 35Ω, guaranteed matching within 2Ω, and on-resistance variation of no more than 3Ω support repeatable signal-path behavior across the analog range. These characteristics make the device more appropriate for moderate-impedance sources than for ultra-low-impedance dividers where resistance variation could dominate the error. Keep the switched node short and shielded, provide a stable return path, and control the device from a driver whose timing is synchronized with the measurement sequence.
Empfohlen
Analog Signal Multiplexing
The MAX319CSA+ can implement an SPDT routing stage in a larger analog multiplexer or signal-conditioning system. Its rail-to-rail signal-handling capability supports signal paths extending across the operating range of the device, while the low 10pC charge injection reduces transient disturbance during state changes. For a multiplexed acquisition system, compare source impedance with the maximum 35Ω on-resistance and include attenuation and settling time in the channel error. Place the switch near the front end when source impedance is high, and avoid routing the analog node alongside high-current switching paths.
Empfohlen
Sample-and-Hold Signal Paths
The MAX319CSA+ is suitable for selecting an input before a sample-and-hold stage, particularly when a default route must remain available through the normally closed contact. Its 10pC charge injection and low 35µW power consumption are favorable for compact acquisition electronics. The exact settling performance depends on the total source impedance, capacitance, amplifier bandwidth, and control timing, so calculate those values rather than assuming switching is instantaneous. Place the switch and holding capacitor according to the recommended topology, provide a low-noise ground, and verify that leakage and dielectric absorption remain within the measurement resolution.
Empfohlen
Industrial Control Interface Routing
The MAX319CSA+ can route control or monitor signals in industrial equipment where a single physical channel must select between two paths. The SPDT configuration allows a default state through the normally closed contact while command-controlled electronics select the alternate route. Its matched on-resistance helps preserve relationship between channels, and its low power consumption is useful in distributed interface modules. Ensure the selected signal amplitude remains within the device's operating limits and that nearby motor, relay, and power-conversion circuitry cannot inject excessive transients. Use a continuous ground reference and keep sensitive analog traces away from high-edge-rate control nets.
Empfohlen
Precision Signal-Path Switching
The MAX319CSA+ fits precision signal-path switching where consistent resistance and low injected charge are more important than very low on-resistance. Its on-resistance is specified below 20Ω typical, with guaranteed matching within 2Ω and variation of no more than 3Ω across the analog range. These parameters support predictable attenuation when the source impedance is moderate. Use the switch's off-state leakage and on-resistance limits in the error calculation, establish a clean analog ground, and minimize copper length around the switched node. The device is best suited to instrumentation and control signals rather than demanding high-current power routing.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MAX319CSA+ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MAX319ESA+ |
|---|---|---|
| Brand | Analog Devices | Maxim Integrated |
| Package | 8-pin SOIC | 8-pin SOIC |
| Switch Configuration | SPDT | SPDT |
| Number of Circuits | 1 circuit | 1 circuit |
Wichtigste Unterscheidungsmerkmale
- Provides both default and selected signal paths in one switch (vs. MAX319ESA+)
- Matches signal-path resistance within 2Ω between channels (vs. MAX319ESA+)
- Limits resistance variation to 3Ω maximum over the analog range (vs. MAX319ESA+)
Designhinweise
Treat the MAX319CSA+ on resistance as part of the signal-path impedance. With a maximum of 35Ω, attenuation becomes significant when the source impedance is low, so calculate the closed-switch voltage division and include the 3Ω maximum on-resistance variation across the analog range. For high-impedance sources, also include switch leakage, charge injection, and the capacitance of the routed node in the settling analysis.
Route the switched analog signal as a short, continuous trace and provide a nearby ground reference. Keep the logic-control trace away from the analog terminal to reduce capacitive injection, and use a ground guard where the surrounding board carries switching currents. Consult the manufacturer pin-description table before assigning PCB tracks; the exact terminal names and control polarity must be verified in the device documentation.
Do not treat a normally open or normally closed MAX317/MAX318-family device as a pin-compatible substitute for the SPDT MAX319CSA+. Their default contact behavior differs, even when the package and switching performance are similar. Confirm that the circuit requires both a normally open and normally closed path, then verify the logical control state and timing in the manufacturer documentation before releasing the PCB.
The specified 35µW power consumption makes the MAX319CSA+ suitable for low-power instrumentation, but the complete power budget must include control-driver current and any leakage in the surrounding circuit. Confirm the device supply range and control-logic levels in the manufacturer data sheet before use. Ensure that transients at the analog and control pins remain within the absolute-maximum limits.
Compliance-Informationen
The manufacturer identifies the MAX319 family as production. Specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification declarations were not identified for this ordering code.