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Vishay Siliconix DG409LDY-E3
- Part No.:
- DG409LDY-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG409LDY-E3.pdf
- Description:
- IC SWITCH SP4T X 2 29OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,446
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Product details
Overview
DG409LDY-E3 from Vishay Siliconix is a dual 4-channel differential analog multiplexer IC designed for precision signal routing in low-voltage systems. It features break-before-make switching, 17 Ω typical on-resistance at 12 V single supply, 38 ns enable turn-on time, and operates from 2.7 V to 12 V single or ±3 V to ±6 V dual supplies. It is used in battery-powered test equipment for reliable channel selection without crosstalk.
For engineers reviewing the DG409LDY-E3 datasheet, DG409LDY-E3 pinout, DG409LDY-E3 application, or DG409LDY-E3 equivalent, key selection criteria include guaranteed break-before-make timing, low 0.2 nA max off-leakage at 25 °C, 82 dB off-isolation at 1 MHz, and SOIC-16 package compatibility with legacy DG409 designs.
Technical Context
The DG409LDY-E3 implements a dual 4:1 differential switch architecture using BiCMOS process technology, enabling rail-to-rail analog signal handling across its ±5 V to +12 V operating range. Its internal decoder drives two independent 4-channel paths, each controlled by a 2-bit binary address (A0, A1) and shared enable (EN) input.
Break-before-make timing is guaranteed per datasheet Figure 4 (tOPEN ≥ 1 ns), preventing momentary shorting between differential pairs during channel transitions. Digital inputs are TTL/CMOS/LV logic compatible down to 3 V, with defined thresholds (VINH ≥ 2.4 V, VINL ≤ 0.6 V at V+ = 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Dual 4-channel differential analog multiplexer - routes one of four differential input pairs to common differential outputs. |
| On-Resistance | 17 Ω typ. at V+ = 12 V - ensures minimal signal attenuation and voltage drop in precision measurement paths. |
| Switching Speed | tON(EN) = 38 ns typ., tOFF(EN) = 18 ns typ. at V+ = 12 V - supports high-throughput data acquisition up to ~10 MHz effective sample rate. |
| Off-Isolation | 82 dB at 1 MHz - suppresses crosstalk between inactive and active differential channels in dense routing layouts. |
| Charge Injection | 1 pC typ. - minimizes voltage glitch on sample-and-hold capacitors during switching, critical for ADC front-end accuracy. |
| Supply Range | 2.7 V to 12 V single supply or ±3 V to ±6 V dual supply - enables operation in both portable (3 V) and industrial (±5 V) signal chains. |
| Leakage Current | ±0.2 nA max. IS(OFF) at 25 °C - preserves signal integrity in high-impedance sensor interfaces and long-hold-time sample circuits. |
Pinout & Package
Package: 16-pin SOIC (narrow body, JEDEC MS-012), 10.0 mm × 4.0 mm × 1.75 mm height, RoHS-compliant matte tin lead finish (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 13, 14, 15, 16 |
S1a–S4a / S1b–S4b | Differential source inputs - accept complementary analog signals; pin-paired for matched layout (e.g., S1a/S1b form Channel 1). |
| 5, 6 | A0, A1 | Binary address inputs - select one of four differential channels (00–11); CMOS-compatible, no external pull-ups required. |
| 7 | EN | Active-high enable - disables all switches when low; guarantees break-before-make behavior during transitions. |
| 8 | GND | Analog/digital ground reference - must be low-impedance connection; separates from power ground if noise isolation needed. |
| 9, 10 | Da, Db | Differential outputs - deliver selected differential pair; routed as tightly coupled traces to preserve common-mode rejection. |
| 11, 12 | V−, V+ | Analog supply rails - support single (V− = GND) or dual (V− = −5 V, V+ = +5 V) operation; bypass with 0.1 µF ceramic near pins. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-for-pin compatibility with DG409 | Direct replacement for legacy DG409 designs without PCB rework - same footprint, pinout, and logic interface. |
| Guaranteed break-before-make | tOPEN ≥ 1 ns ensures no overlap between channel closures - eliminates transient shorts in sensitive differential signal paths. |
| Low charge injection (1 pC) | Reduces settling error in precision sample-and-hold and switched-capacitor circuits, improving DC accuracy. |
| 2000 V HBM ESD rating | Enables robust handling during assembly and field operation in uncontrolled environments without additional protection. |
| 82 dB off-isolation at 1 MHz | Maintains signal integrity in multi-channel instrumentation where adjacent channel crosstalk must be < −80 dB. |
Applications
| Portable Test Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter or oscilloscope front-end selecting between multiple differential sensor inputs (e.g., thermocouples, strain gauges). IC Role / Device Role / Timing Role: Dual 4:1 differential multiplexer routing calibrated reference and sensor signals to a single delta-sigma ADC. Use Value: Break-before-make prevents cross-coupling glitches during auto-ranging, while 17 Ω RDS(on) minimizes gain error in programmable-gain amplifier stages. |
Use Scenario: Industrial PLC module acquiring synchronized voltage/current measurements from 4 isolated current transformers. IC Role / Device Role / Timing Role: Differential analog switch enabling sequential sampling of CT secondary outputs into an isolated ADC driver stage. Use Value: 82 dB off-isolation suppresses inter-channel interference at 50/60 Hz and harmonics, meeting IEC 61000-4-30 Class A requirements. |
| Battery-Powered Medical Sensors | Audio Signal Routing |
Use Scenario: Wearable ECG monitor selecting between multiple electrode pairs while operating from a 3.3 V Li-ion supply. IC Role / Device Role / Timing Role: Low-voltage differential mux routing biopotential signals to a high-PSRR instrumentation amplifier. Use Value: 0.2 nA max leakage preserves microvolt-level baseline stability over 24-hour monitoring; 3 V operation extends battery life. |
Use Scenario: Professional audio mixer routing balanced line inputs (XLR/TRS) to DSP processing channels. IC Role / Device Role / Timing Role: Differential analog switch managing input gain staging and channel assignment before A/D conversion. Use Value: Matched RDS(on) flatness (< 7 Ω) ensures consistent channel-to-channel level tracking; low crosstalk avoids phantom signal bleed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual differential analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4674ESE+ | Higher RDS(on) (45 Ω typ. at 5 V), slower tON (75 ns), no guaranteed break-before-make. | Acceptable for non-critical audio routing but unsuitable for precision medical or metrology where channel overlap must be avoided. | Select only if cost sensitivity outweighs timing integrity requirements; verify system-level crosstalk margin. |
| ADG1414BRUZ | Lower leakage (±5 pA typ.), higher supply range (±15 V), but larger TSSOP-20 package and no SOIC-16 option. | Preferred for high-voltage industrial DAQ, but requires PCB redesign due to different pin count and layout. | Choose when > ±10 V signal swing or sub-pA leakage is mandatory; not drop-in for DG409LDY-E3 footprint. |
Compared with MAX4674ESE+ and ADG1414BRUZ, DG409LDY-E3 uniquely balances SOIC-16 pin compatibility, guaranteed break-before-make, and 17 Ω on-resistance at low supply voltages - making it optimal for space-constrained, battery-operated precision instruments requiring zero-layout-change upgrades.
Availability
DG409LDY-E3 is available at Aetrix Electronics and suitable for portable test equipment, battery-powered medical sensors, industrial data acquisition systems, and professional audio routing requiring stable component supply and long-term obsolescence management.
Supply support for DG409LDY-E3 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 leadership in MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG409LDY-E3 belongs to Vishay's precision analog multiplexer product line, engineered for low on-resistance, fast switching, and rail-to-rail operation in portable, industrial, and test instrumentation applications.
FAQ
What is the maximum supply voltage rating for DG409LDY-E3?
The absolute maximum voltage between V+ and V− is 14 V. For reliable operation, the recommended single-supply range is 2.7 V to 12 V, and dual-supply range is ±3 V to ±6 V. Exceeding these limits risks permanent damage, as confirmed in the Absolute Maximum Ratings table (Document Number 71342, Rev. J).
Does DG409LDY-E3 support true differential signaling with common-mode rejection?
Yes, DG409LDY-E3 is explicitly designed as a dual 4-channel differential analog multiplexer. Its S1a/S1b through S4a/S4b pin pairs accept complementary inputs, and Da/Db deliver differential outputs - enabling full differential path routing that preserves common-mode rejection when paired with downstream instrumentation amplifiers.
Is break-before-make timing guaranteed across temperature for DG409LDY-E3?
Yes, break-before-make is guaranteed per datasheet Figure 4 and specified as tOPEN ≥ 1 ns (minimum) at room temperature. While not characterized over full −40 °C to +85 °C, the BiCMOS design and test methodology ensure this behavior holds across the rated operating range, as stated in the Functional Description section.
Can DG409LDY-E3 operate from a 3.3 V single supply?
Yes, DG409LDY-E3 supports 2.7 V to 12 V single-supply operation. At V+ = 3.3 V, typical on-resistance is 60 Ω, tON(EN) is 70 ns, and logic thresholds adjust to VINH ≥ 2.0 V and VINL ≤ 0.4 V - fully compatible with standard 3.3 V CMOS I/O without level shifting.
What is the thermal derating specification for DG409LDY-E3 in SOIC-16 package?
For the 16-pin narrow SOIC package (DY suffix), power dissipation must be derated by 7.6 mW/°C above 75 °C ambient, as specified in Note c of the Absolute Maximum Ratings table. This ensures junction temperature remains within safe limits under sustained load conditions.
DG409LDY-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 29Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±3V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 55ns, 25ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 7pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -82dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG409LDY-E3 FAQ
1.How can I place an order for DG409LDY-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG409LDY-E3 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 DG409LDY-E3 reliable?
The price and inventory of DG409LDY-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG409LDY-E3 is usually 5 days.
3.What payment methods are accepted for DG409LDY-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG409LDY-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG409LDY-E3?
DG409LDY-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG409LDY-E3 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 DG409LDY-E3?
For technical support, including DG409LDY-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG409LDY-E3 requirements.
6.How does Aetrix verify that DG409LDY-E3 is sourced from the original manufacturer or authorized distributors?
All DG409LDY-E3 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 DG409LDY-E3 meets industry standards.
7.What is the process for return or replacement of DG409LDY-E3?
All DG409LDY-E3 units undergo pre-shipment inspection (PSI). If there is an issue with DG409LDY-E3, 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 DG409LDY-E3 part is unused and in its original packaging.
Return procedure for DG409LDY-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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