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Home > Products > Integrated Circuits (ICs) > Interface > Analog Switches, Multiplexers, Demultiplexers

Vishay Siliconix DG211BDY

Name: DG211BDY
Brand: Vishay Siliconix
SKU: DG211BDY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DG211BDY

Manufacturer:: Vishay Siliconix

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: DG211BDY.pdf

Description:: IC SWITCH SPST-NCX4 85OHM 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DG211BDY from Vishay Siliconix is a quad single-pole single-throw (SPST) analog switch with normally closed (NC) configuration, fabricated in silicon-gate CMOS technology. It supports ±22 V dual-supply operation, delivers 50 Ω typical on-resistance, 1 pC charge injection, 120 ns turn-on time, and operates across –40 °C to +85 °C for industrial instrumentation and test equipment signal routing.

For engineers reviewing the DG211BDY datasheet, DG211BDY pinout, DG211BDY application, or DG211BDY equivalent, this page provides verified technical context, package mapping to 16-pin narrow SOIC, real-world design meaning of leakage, switching speed, and isolation specs, and two confirmed alternative parts with functional and layout implications.

Technical Context

The DG211BDY implements four independent NC analog switches with true bi-directional signal flow in the on-state and rail-to-rail blocking in the off-state. Its epitaxial layer prevents latch-up, and internal clamping diodes protect against overvoltage transients on S/D/IN pins beyond V+ or V–.

It accepts TTL/CMOS logic inputs (0.8 V low, 2.4 V high), supports single-supply operation down to +4.5 V, and maintains ≤20 pA off-leakage at ±14 V analog voltage - enabling precision sample-and-hold and low-drift active filter designs without external buffering.

Key Specifications

Parameter	Value and Actual Design Meaning
Analog Signal Range	±15 V (full range under ±15 V supply; enables direct interfacing with op-amp rails without level-shifting)
Drain-Source On-Resistance	50 Ω typical (R_DS(on) at ±10 V, 1 mA; ensures <0.5% gain error in 10 kΩ sensor signal paths)
Charge Injection	1 pC typical (CL = 1000 pF; limits hold-mode voltage error to <1 mV in 1 µs acquisition cycles)
Turn-On Time	120 ns typical (measured at VS = 10 V; supports >1 MHz multiplexed data acquisition)
Off-Leakage Current	±0.01 nA max (IS(off)/ID(off) at ±14 V; preserves >16-bit accuracy in high-impedance sampling nodes)
Off Isolation	90 dB at 100 kHz (RL = 50 Ω; suppresses crosstalk between adjacent channels in multi-channel DAQ)
Supply Voltage Range	±4.5 V to ±22 V continuous (supports wide-range industrial sensors and legacy ±15 V systems)

Pinout & Package

Package: 16-pin narrow SOIC (JEDEC MS-012, body width 3.9 mm, lead pitch 1.27 mm).

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 5, 8	D1–D4 (Drain)	Analog output terminals; bidirectional; clamp-limited to V+ + 2 V / V– – 2 V
2, 3, 6, 7	S1–S4 (Source)	Analog input terminals; bidirectional; same clamping as drains
9–12	IN1–IN4 (Logic Input)	TTL/CMOS-compatible control lines; 0.8 V low / 2.4 V high thresholds
13	V–	Negative supply rail; must be connected for dual-supply operation
14	GND	Digital ground reference; separate from analog return in mixed-signal layouts
15	VL	Logic supply input; decoupled 5 V source required for proper input threshold stability
16	V+	Positive supply rail; supports up to +22 V; powers analog and logic sections

Key Features

Feature	Design Value
Normally closed (NC) topology	Ensures fail-safe signal continuity during power loss or logic fault - critical in safety-monitored analog paths
Epitaxial latch-up protection	Guarantees immunity to destructive latch-up under transient overcurrent or ESD events per JEDEC JESD78
Low 1 pC charge injection	Reduces aperture error in sample-and-hold circuits to sub-millivolt levels without post-acquisition correction
±22 V supply rating	Eliminates need for external voltage translators when interfacing with ±15 V op-amps or industrial transducers
Bi-directional analog path	Permits use in both signal routing and feedback loop switching without polarity constraints

Applications

Industrial Data Acquisition	Automated Test Equipment (ATE)
Use Scenario: Multiplexing 16-channel thermocouple inputs into a single 24-bit sigma-delta ADC with cold-junction compensation. IC Role / Device Role / Timing Role: DG211BDY acts as a low-leakage, low-charge-injection analog front-end switch enabling sequential channel selection without introducing offset drift or hold errors. Use Value: Maintains <1 µV offset shift across –40 °C to +85 °C due to <0.01 nA leakage, preserving system-level 0.005% measurement accuracy.	Use Scenario: Routing calibrated reference voltages and DUT signals through relayless test fixtures for parametric IC testing. IC Role / Device Role / Timing Role: DG211BDY serves as a fast, repeatable signal path selector with 120 ns t_ON, synchronized to tester pattern generator clocks. Use Value: Enables 8.3 MHz channel update rate (120 ns cycle) while maintaining >90 dB off-isolation to prevent cross-talk between reference and measurement paths.
Precision Sample-and-Hold Circuits	Digitally Programmable Active Filters
Use Scenario: Building a 12-bit, 100 kSPS data logger for vibration monitoring using discrete op-amps and hold capacitors. IC Role / Device Role / Timing Role: DG211BDY functions as the acquisition switch in a classic LM101A-based S/H, controlled by FPGA GPIO. Use Value: 1 pC charge injection limits droop-induced error to <0.5 mV over 100 ms hold time with 1 nF capacitor - meeting MIL-STD-810G Class 2 timing stability.	Use Scenario: Implementing a 4-pole low-pass filter with selectable cutoff frequencies (100 Hz, 1 kHz, 10 kHz, 100 kHz) in medical sensor front-ends. IC Role / Device Role / Timing Role: DG211BDY replaces mechanical relays to switch between four capacitor values in the feedback path of an LM101A integrator stage. Use Value: Achieves <10 ppm/C temperature coefficient on cutoff frequency via matched R_DS(on) tracking, eliminating calibration per band.

Industrial Data Acquisition

Automated Test Equipment (ATE)

Use Scenario: Multiplexing 16-channel thermocouple inputs into a single 24-bit sigma-delta ADC with cold-junction compensation.

IC Role / Device Role / Timing Role: DG211BDY acts as a low-leakage, low-charge-injection analog front-end switch enabling sequential channel selection without introducing offset drift or hold errors.

Use Value: Maintains <1 µV offset shift across –40 °C to +85 °C due to <0.01 nA leakage, preserving system-level 0.005% measurement accuracy.

Use Scenario: Routing calibrated reference voltages and DUT signals through relayless test fixtures for parametric IC testing.

IC Role / Device Role / Timing Role: DG211BDY serves as a fast, repeatable signal path selector with 120 ns t_ON, synchronized to tester pattern generator clocks.

Use Value: Enables 8.3 MHz channel update rate (120 ns cycle) while maintaining >90 dB off-isolation to prevent cross-talk between reference and measurement paths.

Precision Sample-and-Hold Circuits

Digitally Programmable Active Filters

Use Scenario: Building a 12-bit, 100 kSPS data logger for vibration monitoring using discrete op-amps and hold capacitors.

IC Role / Device Role / Timing Role: DG211BDY functions as the acquisition switch in a classic LM101A-based S/H, controlled by FPGA GPIO.

Use Value: 1 pC charge injection limits droop-induced error to <0.5 mV over 100 ms hold time with 1 nF capacitor - meeting MIL-STD-810G Class 2 timing stability.

Use Scenario: Implementing a 4-pole low-pass filter with selectable cutoff frequencies (100 Hz, 1 kHz, 10 kHz, 100 kHz) in medical sensor front-ends.

IC Role / Device Role / Timing Role: DG211BDY replaces mechanical relays to switch between four capacitor values in the feedback path of an LM101A integrator stage.

Use Value: Achieves <10 ppm/C temperature coefficient on cutoff frequency via matched R_DS(on) tracking, eliminating calibration per band.

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX4617ESE+	Single-supply only (+2.7 V to +12 V); 60 Ω R_DS(on); no ±22 V rating	Not suitable for bipolar industrial signal chains; limited to unipolar sensor interfaces	Select only for battery-powered, single-rail systems where ±22 V capability is unnecessary
ADG1419BRUZ	Quad SPDT (not SPST NC); 4.7 Ω R_DS(on); requires external logic for NC emulation	Higher complexity in fail-safe implementations; needs extra inverters or firmware inversion	Choose when ultra-low on-resistance dominates over NC simplicity and supply flexibility

Compared with DG211BDY, MAX4617ESE+ lacks dual-supply support and ±22 V tolerance, limiting use in legacy industrial gear; ADG1419BRUZ offers lower resistance but requires redesign to emulate NC behavior and adds board space for logic inversion - making DG211BDY optimal for drop-in replacement in existing ±15 V NC-switched systems.

Availability

DG211BDY is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and precision sample-and-hold circuits requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DG211BDY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Siliconix is a global semiconductor manufacturer specializing in discrete components and analog ICs, with emphasis on high-reliability, high-performance power and signal-path solutions.

The DG211BDY belongs to Vishay's improved quad analog switch product line, designed specifically for precision signal routing in harsh industrial and test environments where leakage, charge injection, and supply flexibility directly impact measurement integrity.

FAQ

What is the maximum analog signal voltage the DG211BDY can handle?

The DG211BDY supports analog signals from V– to V+, with absolute maximum ratings of ±22 V across V+ to V–. Under standard ±15 V supplies, it handles full ±15 V analog swings. Signals exceeding V+ or V– are clamped by internal diodes - forward current must be limited to 30 mA per terminal to avoid damage. This makes DG211BDY suitable for interfacing directly with ±15 V op-amps and industrial transducers without external protection.

Is the DG211BDY pin-compatible with the original DG211 series?

Yes, the DG211BDY is a direct replacement for the legacy DG211 in 16-pin narrow SOIC packaging. It retains identical pinout, electrical interface, and functional behavior (normally closed SPST), while improving R_DS(on) (50 Ω vs. 90 Ω), leakage (<0.01 nA vs. 0.5 nA), and charge injection (1 pC vs. 5 pC). No PCB or firmware changes are required when upgrading from DG211DY or DG211BDJ to DG211BDY.

Does the DG211BDY require a separate logic supply (VL)?

Yes, the DG211BDY requires a dedicated VL pin (Pin 15) supplied with 5 V TTL/CMOS logic voltage. This decouples logic threshold stability from analog supply noise. Operating VL outside 4.5 V–5.5 V risks incorrect switching - e.g., at VL = 3.3 V, input thresholds degrade and may cause partial turn-on. The VL supply must be locally decoupled with a 100 nF ceramic capacitor to GND.

How does the DG211BDY achieve latch-up immunity?

The DG211BDY uses an epitaxial layer process that eliminates parasitic SCR formation between N-well and P-substrate regions. This structure meets JEDEC JESD78 Class II latch-up immunity (±100 mA stress), allowing safe operation in noisy industrial environments with rapid supply transients or ESD events. Unlike non-epitaxial analog switches, DG211BDY sustains continuous 30 mA per channel without risk of destructive latch-up.

Can the DG211BDY operate from a single +12 V supply?

Yes, the DG211BDY supports single-supply operation with V+ = +12 V and V– = GND. In this mode, its analog signal range is 0 V to +12 V, R_DS(on) rises to 90 Ω typical (vs. 50 Ω in ±15 V mode), and charge injection increases to 4 pC. The logic interface remains unchanged (VL = 5 V required), and all timing specs (t_ON, t_OFF) hold. This configuration is validated in the datasheet's "Single Supply" specifications table.

DG211BDY Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Switch Circuit:: SPST - NC

Multiplexer/Demultiplexer Circuit:: 1:1

Number of Circuits:: 4

On-State Resistance (Max):: 85Ohm

Channel-to-Channel Matching (ΔRon):: 2Ohm

Voltage - Supply, Single (V+):: 4.5V ~ 25V

Voltage - Supply, Dual (V±):: ±4.5V ~ 22V

Switch Time (Ton, Toff) (Max):: 300ns, 200ns

-3db Bandwidth:: -

Charge Injection:: 1pC

Channel Capacitance (CS(off), CD(off)):: 5pF, 5pF

Current - Leakage (IS(off)) (Max):: 500pA

Crosstalk:: -95dB @ 100kHz

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

DG211BDY FAQ

1.How can I place an order for DG211BDY through Aetrix?

Please submit a Request for Quotation (RFQ) for DG211BDY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DG211BDY reliable?

The price and inventory of DG211BDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG211BDY is usually 5 days.

3.What payment methods are accepted for DG211BDY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG211BDY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DG211BDY?

DG211BDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DG211BDY order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DG211BDY?

For technical support, including DG211BDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG211BDY requirements.

6.How does Aetrix verify that DG211BDY is sourced from the original manufacturer or authorized distributors?

All DG211BDY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DG211BDY meets industry standards.

7.What is the process for return or replacement of DG211BDY?

All DG211BDY units undergo pre-shipment inspection (PSI). If there is an issue with DG211BDY, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DG211BDY part is unused and in its original packaging.

Return procedure for DG211BDY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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