DG211CY+ - Quad SPST CMOS Analog Switch | Analog Devices
Référence : DG211CY+ ✓ ActifDG211CY+ Présentation
A CMOS analog switch is an integrated semiconductor device that routes analog signals between circuit nodes under digital control. The DG211 family belongs to the analog-switch and multiplexer hierarchy, which supports general-purpose signal routing in communications, instrumentation, process control, and computer peripheral equipment. The DG211 switches are normally closed, so each channel connects its input to its output whenever its control input is inactive.
Key features include four SPST channels, a 175 ohm maximum on-resistance, operation across ±4.5 V to ±18 V dual-supply ranges, and a 500 ns maximum off-time. According to the Analog Devices DG211 data sheet, the DG211 will not latch up when the power supplies are disconnected while input signals remain connected. Break-before-make operation is also guaranteed, which helps prevent two signal sources from being momentarily shorted together.
The devices can block signals up to 30 V peak-to-peak in the OFF condition, making them useful for protecting downstream circuitry from higher-voltage external signals. True bidirectional ON-state behavior allows the same switch to route either signal direction, while the normally closed configuration provides a defined signal path during power-up and control-failure conditions.
Typical applications include multimeter and test-equipment input selection, process-control signal routing, communications equipment, and peripheral interface boards. Designers should verify the control-logic thresholds, switching timing, leakage, charge injection, and absolute maximum ratings against their signal amplitude and impedance before applying the switch.
This page consolidates verified manufacturer and distributor information, package and supply details, application guidance, and qualified drop-in information for DG211CY+ designs.
Alternatives de remplacement direct pour DG211CY+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
DG211CSE+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
DG211CY+ Valeurs maximales et caractéristiques électriques
| Number of Channels | 4 channels |
| Switch Configuration | 4 x SPST |
| Switch Type | Normally closed CMOS analog switch |
| Maximum On-Resistance | 175 ohm |
| Minimum Dual Supply Voltage | ±4.5 V |
| Maximum Dual Supply Voltage | ±18 V |
| Off Signal Blocking Voltage | 30 V peak-to-peak |
| Maximum Off-Time | 500 ns |
| ON-State Conductivity | True bidirectional |
| Switching Behavior | Guaranteed break-before-make |
| Latch-Up Protection | Guaranteed not to latch up when supplies are disconnected while input signals remain connected |
| Boîtier | SOIC-16, 0.150 inch body width |
| Package Designation | PDSO16, MS-012AC |
| Type de montage | SMD/SMT surface mount |
| Minimum Operating Temperature | 0 °C |
| Maximum Operating Temperature | 70 °C |
Guide de configuration des broches du DG211CY+ pdso16, ms-012ac
Configuration des broches du DG211CY+ (boîtier pdso16, ms-012ac). 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 DG211CY+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
DG211CY+ convient pour 6 applications: Multimeter and Test Equipment Signal Routing, Process-Control Analog Signal Multiplexing, Communications Equipment Analog Path Selection, Computer Peripheral and Interface Boards, Instrumentation Amplifier Input Selection, Analog Isolation and Signal Gating.
Multimeter and Test Equipment Signal Routing
The DG211CY+ fits input-selection and range-routing networks because its four normally closed SPST channels can maintain a connected measurement path during idle periods. The 175 ohm maximum on-resistance is modest compared with low-impedance instrument front ends, while true bidirectional conduction allows the same routing topology to handle input and output directions. Break-before-make operation reduces the chance of momentarily tying two external sources together. Verify leakage, off impedance, and the control thresholds in the DG211 data sheet against the meter's input impedance and highest expected transient voltage.
Recommandé
Process-Control Analog Signal Multiplexing
The DG211CY+ is suitable for process-control boards that must connect several analog sources to a shared amplifier or controller input. Its four independent SPST channels support true bidirectional routing, and the normally closed configuration preserves a stable signal path when a control command is inactive. The ±4.5 V to ±18 V dual-supply range accommodates common industrial interface levels. Because the specified 70 °C maximum operating temperature is narrower than some extended-temperature industrial requirements, confirm environmental limits or select a wider-temperature grade for harsh installations.
Recommandé
Communications Equipment Analog Path Selection
The DG211CY+ can route low-frequency analog paths in communications equipment where four independently controlled channels are required. Its 500 ns maximum off-time supports relatively quick isolation transitions, and the guaranteed break-before-make characteristic prevents overlapping outputs during switching. The 175 ohm maximum on-resistance must be checked against the line impedance and insertion-loss budget. For high-speed RF paths, verify charge injection, off isolation, bandwidth, and the 30 V peak-to-peak blocking condition before committing the design.
Recommandé
Computer Peripheral and Interface Boards
The DG211CY+ matches legacy and industrial peripheral boards that require a compact, surface-mount way to switch four analog connections. The 16-pin SOIC package supports automated assembly, while the normally closed channels can simplify default-path routing and fail-safe behavior. Its 175 ohm maximum on-resistance is acceptable for many control and sensor paths but may require a lower-value buffer for high-impedance sensors. Confirm pin mapping, control polarity, and absolute maximum ratings against the specific board schematic because the supplied verification does not include the complete pinout table.
Recommandé
Instrumentation Amplifier Input Selection
The DG211CY+ can select among multiple sensor or calibration inputs feeding an instrumentation front end. Its four normally closed channels provide predictable default connections, while bidirectional conduction offers flexibility when the same switch topology must support either sourcing or sinking a signal. The maximum on-resistance of 175 ohm may interact with source impedance and amplifier bias current, so input-current errors should be evaluated rather than comparing resistance alone. Check leakage, charge injection, and off-state behavior against the required measurement accuracy.
Recommandé
Analog Isolation and Signal Gating
The DG211CY+ is useful for gating analog paths where signals must be disconnected during a measurement or calibration interval. Its OFF state can block signals up to 30 V peak-to-peak, while true bidirectional behavior allows the switch to be used for either signal injection or removal. Break-before-make operation helps avoid overlap during switching. The device is not a safety-rated isolator, and its 70 °C maximum rating plus unspecified leakage values require validation for precision or high-voltage test systems.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour DG211CY+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | DG211CSE+ |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | SOIC-16, 0.150 inch body width, MS-012AC | 16-SOIC, 0.154 inch / 3.90 mm body width |
| Number of Channels | 4 | 4 |
| Switch Configuration | 4 x SPST | 4 x SPST |
| Switch Type | Normally closed CMOS analog switch | Normally closed CMOS analog switch |
Principaux différenciateurs
- Wide dual-supply operating range (vs DG211CSE+)
- Normally closed default signal paths (vs DG211CSE+)
- Guaranteed break-before-make operation (vs DG211CSE+)
- Bidirectional ON-state signal path (vs DG211CSE+)
Notes de conception
Do not treat four SPST channels as a multiplexer without verifying signal-path compatibility. The DG211CY+ provides four independent, normally closed switches, and its verified specifications establish a 175 ohm maximum on-resistance, 30 V peak-to-peak OFF-state blocking capability, and true bidirectional ON behavior. Before routing external signals, check absolute maximum ratings on every control and signal pin, especially when the input can exceed the ±18 V supply limit while the device is powered down.
For precision analog paths, compare insertion resistance with the complete signal-source impedance rather than treating 175 ohm as negligible. Estimated guidance: if the external source presents 1 kohm, the maximum switch resistance adds about 17.5% of that impedance and can create gain error. Leakage, charge injection, off isolation, and switching transients were not present in the verified text and must be obtained from the manufacturer data sheet before high-impedance or fast-edge designs are released.
Keep control traces away from sensitive analog inputs and place the switch close to the signal source or destination to minimize PCB leakage and parasitic capacitance. Because the package is a 16-pin SOIC with a 0.150 inch body width, use the MS-012AC land pattern documented in the verified package information. For each normally closed channel, maintain a consistent reference and return path so that switching transients do not couple directly into the following amplifier or converter input.
Informations de conformité
The verified product and distributor records identify the DG211CY+ as a SOIC-16 CMOS analog switch but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. The 0 °C to 70 °C commercial operating-temperature range makes AEC-Q100 automotive qualification inapplicable to this specific ordering information. Compliance documents should be obtained from the manufacturer or distributor for the purchased lot.
