DG411 - Quad SPST CMOS Analog Switch, 35 Ohm | Analog Devices
MPN: DG411 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.68 | $4.68 |
| 10 | $4.21 | $42.10 |
| 100 | $3.85 | $385.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.34 | $3,340.00 |
DG411 Overview
A quad SPST analog switch is an integrated circuit that contains four independent electronically controlled switches for passing or blocking analog signals. Within the signal-routing hierarchy, it sits above single SPST switches and below analog multiplexers, and is a foundational building block of the broader analog signal switching and power management IC families. The DG411 series conducts equally well in either direction, making it a true bilateral switch for AC and DC signals.
Key features include a low on-resistance of 35 ohm maximum, on-resistance matching between switches of 3 ohm maximum, and guaranteed on-resistance flatness over the signal range of 4 ohm maximum, according to the manufacturer product page. The switches conduct equally well in either direction, and the digital inputs accept both TTL and CMOS logic levels.
The DG411 series improvements are made possible by a high-voltage silicon-gate CMOS process. An epitaxial layer prevents the latch-up associated with older CMOS technologies. The 44V maximum voltage range permits controlling 40VP-P signals. Power supplies may be single-ended from 44V, or split from plus-minus 20V, giving designers flexibility in mixed-signal systems.
Typical applications include audio signal routing, sample-and-hold circuits, data acquisition channel selection, precision test instrumentation, and communication system switching matrices. The four independent switches allow multiple signal paths to be controlled from separate logic lines without cross-channel interaction.
When designing with the DG411, ensure logic drive levels meet the TTL/CMOS input thresholds, and verify that signal swing stays within the supply rails to avoid internal clamping. Note that the DG411 is normally-open; the DG412 (normally-closed) and DG413 (mixed) share the same pinout for polarity changes without PCB rework.
This page synthesizes distributor pricing, drop-in alternatives across multiple manufacturers, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DG411 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DG411 (same form factor and footprint) β differing in Package, Switch Configuration, Analog Signal Range, On-Resistance (rDS on), Power Dissipation.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
DG412
β Drop-Inβ In Stock
$2.85 / Unit
View Datasheet βDG413
β Drop-Inβ In Stock
$3.34 / Unit
View Datasheet βDG411F
β Drop-Inπ Reference alternative (not in catalog)
DG411DY-T1-E3
β Drop-Inπ Reference alternative (not in catalog)
DG411
β Drop-Inβ In Stock
$3.34 / Unit
View Datasheet βDG211
β Drop-Inπ Reference alternative (not in catalog)
DG411 Maximum Ratings & Electrical Characteristics
| Switch Configuration | 4 x SPST (normally open) |
| On-Resistance (Max) | 35 ohm |
| On-Resistance Matching (Max) | 3 ohm |
| On-Resistance Flatness (Max) | 4 ohm |
| Supply Voltage Range | Single-ended up to 44V, or split +/-20V |
| Signal Handling | 40VP-P signals |
| Logic Input Compatibility | TTL and CMOS |
| Signal Direction | Bilateral (conducts equally in either direction) |
| Number of Circuits | 4 |
| Package | 16-SOIC |
| Mounting Type | Surface Mount |
| Technology | High-voltage silicon-gate CMOS with epitaxial layer (latch-up immune) |
| Drop-in Replacement For | DG211 / DG212 series |
DG411 16-soic Pin Configuration Guide
Pin configuration for DG411 (16-soic package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DG411.
Refer to the datasheet for full pin configuration.
Typical Applications
DG411 is suitable for 6 applications: Audio Signal Routing, Data Acquisition Channel Selection, Sample-and-Hold Circuits, Test and Measurement Instrumentation, Communication System Switching, Industrial Control and Process Signal Switching.
Audio Signal Routing
The DG411's plus-minus 20V split-supply capability and 40VP-P signal handling accommodate professional and consumer audio levels, while its 35 ohm maximum on-resistance with only 4 ohm maximum flatness across the signal range minimizes insertion loss and distortion in the audio path. Because the CMOS switch conducts equally well in either direction, it handles positive and negative audio half-cycles identically. Each of the four independent SPST channels can mute or connect a separate audio line under TTL/CMOS logic control, enabling channel select, mute, and signal-gating functions in mixers, preamplifiers, and A/V switchboxes without relays or mechanical wear.
Recommended
Data Acquisition Channel Selection
In multi-channel data acquisition front ends, the DG411 routes sensor outputs to a shared amplifier or ADC input. Its 3 ohm maximum channel-to-channel on-resistance matching keeps gain errors consistent across channels, which is critical for calibration accuracy in multiplexed systems. The 44V supply ceiling and epi-layer latch-up immunity allow switching of industrial sensor signals that exceed 5V logic-class switch limits. Low flatness (4 ohm max) ensures the Ron-induced error does not vary with the sensor signal amplitude. Digital inputs accept TTL or CMOS control from an FPGA or microcontroller, enabling fast channel sequencing under software control.
Recommended
Sample-and-Hold Circuits
The DG411 functions as the acquisition switch in sample-and-hold and track-and-hold stages ahead of precision ADCs. Its low 35 ohm on-resistance shortens acquisition time by reducing the RC time constant into the hold capacitor, while its low charge injection relative to earlier switch generations reduces hold-step error. The latch-up-resistant epitaxial process protects the switch during the supply-sequencing events that commonly occur at system power-up in mixed-signal boards. Four independent switches in one package allow multiple sample-and-hold channels to share a single footprint, reducing board area and BOM line items in multi-channel instrumentation and waveform digitizers.
Recommended
Test and Measurement Instrumentation
Bench instruments, automated test equipment, and signal generators use the DG411 to switch attenuator paths, input ranges, and calibration references. The 44V single-ended supply range permits direct handling of higher-amplitude measurement signals up to 40VP-P, reducing the need for front-end scaling. Guaranteed on-resistance flatness over the signal range means the switch's error contribution remains predictable regardless of the signal level being routed, simplifying error budgeting. TTL/CMOS-compatible control inputs interface directly with the instrument's digital control logic. The bilateral switching characteristic supports both forward and reverse signal paths in measurement setups.
Recommended
Communication System Switching
In wired communication equipment, the DG411 switches line signals, modem paths, and telephony signaling up to 40VP-P thanks to its 44V maximum supply range. The normally-open SPST topology lets a control line disconnect a channel completely, and the silicon-gate CMOS process with epitaxial layer suppresses latch-up when line transients occur, which is essential in telecom environments subject to surges. Its 35 ohm on-resistance adds modest series loss that can be budgeted in the line design. The quad configuration allows several independent line connections in one SOIC-16 package, cutting board area versus discrete relay or multiple single-switch solutions.
Recommended
Industrial Control and Process Signal Switching
Industrial controllers and PLC analog modules use the DG411 to switch process signals, sensor feeds, and calibration loops. Its latch-up immunity addresses the harsh electrical environment of factory floors, where transients and improper sequencing are common. The split-supply operation up to plus-minus 20V supports bipolar industrial signal standards such as +/-10V, covering the full span without attenuation. TTL/CMOS-compatible inputs allow direct connection of microcontroller or PLC I/O logic. Four independent switches provide redundancy or multi-loop selection in one package, and the surface-mount 16-SOIC format suits automated assembly of industrial control boards.
Recommended
Recommended Products Summary
Engineering reference data for DG411 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DG412 | DG413 | DG411F | DG411DY-T1-E3 | DG211 |
|---|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same (stated pin compatible) | 16-SOIC - same | 16-SOIC/DIP - same footprint |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Vishay Siliconix | Analog Devices |
| Switch Configuration | 4 x SPST normally open | 4 x SPST normally closed | 2 x NO + 2 x NC SPST | 4 x SPST, fault protected | 4 x SPST normally open | 4 x SPST (predecessor) |
| Fault Protection | None (standard) | None | None | +/-36V powered / +/-40V unpowered on all terminals | None | None |
Key Differentiators
- Latch-up resistant process (vs DG211)
- Fault-protected pin-compatible option (vs DG411F)
- Multi-source availability (vs DG411DY-T1-E3 (Vishay))
Design Notes
The DG411 may be powered from a single-ended supply up to 44V or split supplies up to +/-20V, per the manufacturer description. Estimate supply decoupling with a 0.1uF ceramic capacitor placed within 5mm of each supply pin; when using split supplies, decouple both V+ and VL rails independently. Keep the analog signal swing within the supply rails - the 40VP-P signal capability presumes the switch sits inside its 44V envelope. Exceeding the rail by more than a diode drop at the switch terminals can forward-bias internal protection structures and inject current into the substrate.
The DG411 is a normally-open switch; designers who assumed normally-closed behavior should use the DG412, which shares the same 16-pin pinout and can be substituted without PCB rework. Also note the DG411 is the designated drop-in replacement for the older DG211/DG212, so legacy DG211 sockets can be filled directly with improved Ron and matching. Verify logic input thresholds against the actual supply configuration, since TTL/CMOS compatibility thresholds scale with supply in split-rail systems.
Place the DG411 close to the analog source or load to minimize exposed high-impedance nodes; with 35 ohm on-resistance, signal bandwidth into capacitive loads is RC-limited, so long traces to a capacitive load will roll off the signal. Route the four independent switch channels with ground guard traces between them to preserve channel-to-channel isolation at high frequencies. The epitaxial-layer latch-up immunity helps during power-up, but proper supply sequencing of the digital controller before the switch rails remain good practice in mixed-signal boards.
Compliance Information
Verified web data does not include explicit RoHS/REACH certificate statements for the DG411 ordering suffixes. Modern suffixes such as Vishay DG411DY-T1-E3 are typically RoHS/lead-free compliant, but confirm on the manufacturer product page for the exact ordering code.
