DG442CY+ - 85Ω Quad SPST Analog Switch | Analog Devices
Référence : DG442CY+ ✓ ActifDG442CY+ Présentation
An analog switch is a semiconductor interface that connects or isolates a signal path under digital control. The DG442CY+ belongs to the analog switch and multiplexer hierarchy, where multiplexers combine switching functions with channel-selection logic. Unlike mechanical relays, this CMOS implementation offers compact integration, fast electronic control, low charge injection of 10pC maximum, and low power consumption of 1.65mW. These characteristics make it useful where several independent analog signals must be routed on a compact circuit board.
Key features include four normally open SPST channels, an 85Ω on-resistance, 4Ω maximum on-resistance matching between switches, and 9Ω maximum on-resistance flatness over the signal range. The switches conduct equally well in either direction, which simplifies routing design when the source and destination can alternate roles. Charge injection of 10pC maximum helps limit control-transition disturbance, while the low 1.65mW power consumption supports space-constrained and portable equipment.
The DG442CY+ is implemented as a monolithic CMOS analog-switch circuit with four independent control paths. Its matched channel resistance reduces gain variation between similarly driven switches, while the controlled flatness limits amplitude distortion as the analog voltage changes. The bidirectional conduction characteristic allows the same device architecture to support source selection, signal isolation, test-point routing, and power-routing functions when voltage, current, and switching-transient limits remain acceptable.
Typical applications include audio routing, test and measurement systems, instrumentation, industrial control interfaces, sample-and-hold isolation, and compact embedded signal-conditioning systems. In these applications, the four-channel architecture can route one control signal to four different destinations or isolate several test nodes without requiring four separate packages. Designers should still verify the complete operating-voltage, leakage-current, and switching-time limits against their signal range because those values are not included in the supplied verified excerpts.
The primary design consideration is ensuring that switch operation, control-logic levels, and analog signal limits are compatible with the target system. Place the device close to the routed signals to minimize PCB trace capacitance and susceptibility to injection from adjacent switching circuitry. Use a defined ground reference and route control inputs away from sensitive analog nodes. Confirm power-supply sequencing and ensure signal voltages never exceed the device's absolute maximum ratings before enabling the switches.
This product record combines the supplied manufacturer and distributor findings with structured comparisons, drop-in alternatives, and application-focused engineering guidance. It also distinguishes verified parameters from information still requiring confirmation from the complete DG441/DG442 datasheet, helping engineers make a defensible sourcing and design decision without converting unsupported assumptions into specifications.
Alternatives de remplacement direct pour DG442CY+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
DG442DYZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADG222KR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADG712BRZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
DG442CY+ Valeurs maximales et caractéristiques électriques
| Number of Switches | 4 circuits |
| Switch Configuration | 1:1 SPST, normally open |
| On-Resistance | 85 ohm |
| On-Resistance Matching Between Switches | 4 ohm maximum |
| On-Resistance Flatness Over Signal Range | 9 ohm maximum |
| Bidirectional Conduction | Yes |
| Charge Injection | 10 pC maximum |
| Power Consumption | 1.65 mW |
| ESD Tolerance | 2000 V minimum |
| Technology | CMOS |
| Boîtier | 16-pin SOIC |
| Package Width | 3.90 mm |
| Type de montage | Surface mount |
Guide de configuration des broches du DG442CY+ 3.90 mm
Configuration des broches du DG442CY+ (boîtier 3.90 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour DG442CY+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
DG442CY+ convient pour 6 applications: Test and Measurement Signal Routing, Audio Signal Selection, Industrial Control Signal Isolation, Embedded Data Acquisition, Battery-Powered Portable Equipment, Communication Interface Routing.
Test and Measurement Signal Routing
The DG442CY+ fits instrument signal routing because it provides four independent, normally open SPST channels in a 16-SOIC package. Its 85Ω on-resistance, 4Ω maximum matching between switches, and 9Ω maximum flatness help maintain channel-to-channel consistency and limit amplitude variation over the signal range. With 10pC maximum charge injection and 1.65mW power consumption, it can route measurement nodes, route a source to an instrument, or isolate inputs under control. The engineer must still confirm the permitted signal range, leakage, switching time, and supply voltage from the complete manufacturer datasheet.
Recommandé
Audio Signal Selection
The DG442CY+ can route four analog audio paths in compact audio equipment because its four bidirectional SPST switches provide independently controlled connectivity in one 16-SOIC package. The 85Ω on-resistance and 9Ω maximum on-resistance flatness establish predictable insertion loss across the signal range, while matching of 4Ω maximum reduces variation between similarly configured channels. The 10pC maximum charge injection limitation helps constrain control-edge disturbance. For microphone, headphone, or line-level switching, verify the actual signal amplitude, bandwidth, leakage, supply voltage, and audio distortion limits against the complete datasheet.
Recommandé
Industrial Control Signal Isolation
The DG442CY+ is suitable for industrial control boards that need to connect or isolate multiple low-frequency analog command or feedback paths. Four normally open channels provide flexibility for relay-driver isolation, sensor disconnect, actuator routing, and shared-bus contention control. Its 85Ω on-resistance must be checked against the driven load, and the 9Ω maximum flatness helps maintain consistent behavior as command levels vary. The 1.65mW low power consumption can simplify thermal budgets in compact controllers, but engineers must confirm operating temperature, supply range, absolute maximum ratings, and ESD implementation for the industrial environment.
Recommandé
Embedded Data Acquisition
The DG442CY+ can support compact data-acquisition systems by multiplexing or isolating four analog channels without allocating four separate switch packages. Its 85Ω on-resistance should be compared with the source impedance and the ADC input network, while 4Ω maximum matching helps maintain consistency when identical channels are sampled sequentially. The 10pC maximum charge injection parameter must be evaluated against the selected ADC acquisition time and hold characteristics. Bidirectional conduction simplifies both input selection and back-routing, subject to confirming the complete leakage, switching-time, supply-voltage, and signal-range specifications.
Recommandé
Battery-Powered Portable Equipment
The DG442CY+ can serve in portable equipment where four analog connections must be routed efficiently. The verified 1.65mW power consumption limits the device's own power contribution, while its 85Ω on-resistance provides a defined insertion resistance that engineers can include in the system loss budget. The compact 16-SOIC package also preserves board area relative to four discrete switch elements. For battery-powered sensors or wearables, confirm that the control logic and supply remain within the allowed range throughout battery discharge, and account for leakage over long standby periods using the complete datasheet values.
Recommandé
Communication Interface Routing
The DG442CY+ can be evaluated for low-frequency communication-board routing where four independently switched paths must share a controlled interface. Bidirectional conduction allows either endpoint to become the signal source, and the 4Ω maximum matching between switches helps reduce channel-dependent insertion loss. On-resistance flatness of 9Ω maximum is especially relevant when amplitude accuracy must remain stable across the permitted signal range. However, the device's 85Ω insertion resistance may be significant for high-impedance communication nodes. Verify bandwidth, off-state isolation, leakage, switching speed, supply voltage, and ESD requirements before using the part in a communication interface.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour DG442CY+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | DG442DYZ | ADG222KR | ADG712BRZ |
|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Switch Configuration | 4-circuit 1:1 SPST, normally open | SPST, normally open | 4-bit 16-pin analog switch | 4-channel SPST comparison candidate |
Principaux différenciateurs
- Documented channel-to-channel resistance matching (vs ADG712BRZ)
- Guaranteed on-resistance flatness across the signal range (vs ADG222KR)
- Documented low charge injection (vs ADG222KR)
- Low documented power consumption (vs ADG712BRZ)
Notes de conception
Place the DG442CY+ adjacent to the source and destination pads it routes. Short analog traces reduce parasitic capacitance, while keeping the four control inputs away from sensitive switched nodes limits capacitive coupling. Route each switched path as a continuous trace where practical, and avoid sharing long segments between unrelated channels because the 10pC maximum charge-injection figure becomes more consequential when adjacent circuitry has high source impedance.
Do not treat an 85Ω on-resistance as a negligible insertion loss. Include it when calculating source-current capability, divider ratios, ADC drive strength, and allowable signal attenuation. Also verify that the control pins are never exposed to voltages outside the device's absolute maximum ratings. The supplied excerpts do not provide the complete supply or analog signal ranges, so those limits must be taken directly from the official DG441/DG442 datasheet.
For acquisition systems, evaluate the 10pC maximum charge injection against the switched-node capacitance and the receiver's required settling time. A 10pC injected into the node capacitance produces a direct voltage step proportional to C_injection divided by C_total. The 4Ω maximum matching and 9Ω maximum flatness help with channel consistency, but they do not remove the need to characterize transient acquisition error or provide sufficient acquisition time after switching.
Control transitions can couple into nearby analog nodes even though the device is designed for low charge injection. Use a defined, low-impedance ground reference, keep switched and high-impedance signal routes separated from clock and control traces, and consider a ground guard where the board layout permits it. If an ESD event can reach the exposed pins, incorporate the datasheet's 2000V minimum ESD rating into the system protection design rather than assuming it replaces external protection.
Informations de conformité
The supplied excerpts do not contain explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for DG442CY+. AEC-Q100 is not applicable because the part is a general-purpose analog switch and no automotive qualification is stated.