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Vishay Siliconix DG418BDY
- Part No.:
- DG418BDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG418BDY.pdf
- Description:
- IC SWITCH SPST-NOX1 25OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
DG418BDY from Vishay Siliconix is a precision monolithic SPST CMOS analog switch optimized for bidirectional signal routing in high-accuracy instrumentation and portable systems. It features ±15 V analog signal range, 15 Ω typical on-resistance, 110 ns turn-on time, TTL/CMOS-compatible control logic, and operates over –40 °C to +85 °C in SOIC-8 package - enabling low-distortion switching in battery-powered test equipment.
For engineers reviewing the DG418BDY datasheet, DG418BDY pinout, DG418BDY application, or DG418BDY equivalent, this page delivers verified electrical specifications, validated SOIC-8 terminal mapping, real-world use cases in precision sample-and-hold and military radio front-ends, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The DG418BDY implements a single-pole single-throw (SPST) switch architecture built on Vishay's high-voltage silicon gate (HVSG) process, supporting rail-to-rail analog signals up to ±15 V while maintaining guaranteed break-before-make behavior only in the DG419B variant - not applicable to DG418BDY. Its complementary logic response (ON at logic low) distinguishes it from the DG417B.
Each channel conducts identically in both directions when ON and blocks signals up to the supply rails when OFF; an epitaxial layer prevents latchup. Switching performance is characterized at V+ = 15 V, V− = −15 V, VL = 5 V, with dynamic parameters measured under RL = 300 Ω and CL = 35 pF conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V - supports full-rail signal switching without clipping in dual-supply precision systems |
| On-Resistance (RDS(on)) | 15 Ω typical - minimizes signal attenuation and gain error in low-impedance sensor interfaces |
| Turn-On Time (tON) | 110 ns - enables fast multiplexing in data acquisition systems sampling at ≥5 MHz |
| Off-Leakage Current | ±0.25 nA max - preserves accuracy in high-impedance sample-and-hold and integrator circuits |
| Charge Injection | 38 pC - limits voltage glitch amplitude in switched-capacitor applications with ≤10 nF hold capacitors |
| Off Isolation (OIRR) | –82 dB at 1 MHz - suppresses crosstalk between adjacent channels in multi-channel instrumentation |
| Supply Voltage Range | V+ = 20 V max, V− = –20 V max - accommodates industrial ±15 V and automotive 12 V single-supply configurations |
Pinout & Package
Package: 8-pin narrow SOIC (JEDEC MS-012), body dimensions 4.90 mm × 3.90 mm × 1.50 mm, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital control input | Active-low enable: switch closes when voltage ≤ 0.8 V; opens when ≥ 2.4 V |
| 2 (S) | Source terminal | Bidirectional analog I/O node; connects to signal source or load depending on system topology |
| 3 (D) | Drain terminal | Bidirectional analog I/O node; complements S terminal for SPST signal path completion |
| 4 (V−) | Negative supply rail | Reference for negative analog swing; must be decoupled locally to minimize noise coupling |
| 5 (GND) | Digital ground | Logic reference for control inputs; isolated from analog ground in mixed-signal layouts |
| 6 (VL) | Logic supply | Accepts 5 V TTL/CMOS levels independent of analog supply rails; enables level-shifting interface |
| 7 (V+) | Positive supply rail | Reference for positive analog swing; supports up to +20 V for transient margin |
| 8 (NC) | No connect | Internally unconnected; must remain floating - no external tie or pull-up/pull-down |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports signals from V− to V+ without distortion - critical for ±12 V sensor outputs and DAC buffers |
| Low on-resistance flatness | ≤3 Ω variation across ±12.5 V signal range - ensures consistent gain in programmable-gain amplifier paths |
| TTL/CMOS logic compatibility | Operates with standard 5 V logic families without level shifters - simplifies FPGA/microcontroller interface |
| Epitaxial latchup immunity | Guaranteed per MIL-STD-883 Class B - enables robust operation in high-noise military and industrial environments |
| Low charge injection | 38 pC maximum - reduces settling error in 16-bit SAR ADC sample-and-hold stages with 10 nF capacitors |
Applications
| Precision Test Equipment | Precision Instrumentation |
|---|---|
Use Scenario: Automated test system multiplexing thermocouple, RTD, and strain gauge inputs into a single high-resolution ADC. IC Role / Device Role / Timing Role: SPST analog switch isolating individual sensor bridges during measurement cycles to prevent loading and crosstalk. Use Value: 15 Ω RDS(on) and ±0.25 nA leakage preserve microvolt-level accuracy across 100:1 dynamic range measurements. |
Use Scenario: Portable handheld multimeter front-end selecting between AC/DC voltage, current, and resistance ranges. IC Role / Device Role / Timing Role: Bidirectional signal gate routing analog inputs to appropriate conditioning amplifiers and protection circuits. Use Value: ±15 V signal range and rail-to-rail conduction enable true 1000 V DC range support with internal voltage dividers. |
| Battery-Powered Systems | Military Radios |
Use Scenario: Low-power data logger sampling environmental sensors (humidity, pressure, gas) over multi-day deployments. IC Role / Device Role / Timing Role: Power-gated analog path selector enabling zero-current shutdown of unused sensor channels. Use Value: 1 µA max supply current and <1 nA off-leakage extend coin-cell life beyond 2 years in duty-cycled operation. |
Use Scenario: RF receiver front-end switching between antenna diversity paths and calibration loops in tactical HF/VHF radios. IC Role / Device Role / Timing Role: High-isolation analog switch routing IF signals while maintaining <–82 dB off-isolation at 1 MHz. Use Value: –82 dB OIRR and 38 pC charge injection prevent LO feedthrough and baseband corruption in sensitive demodulation stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617EUA+ | Higher on-resistance (35 Ω typ), wider supply range (±20 V), same SOIC-8 package | Less suitable for sub-1 LSB error in 16-bit DAQ; better for high-voltage industrial transducer interfaces | Select when absolute maximum supply rating > ±15 V is required and on-resistance tolerance >20 Ω is acceptable |
| ADG1419BRMZ | Lower on-resistance (1.3 Ω typ), higher cost, 10-lead MSOP package, requires different PCB layout | Enables ultra-low distortion in audio and medical imaging; incompatible with existing SOIC-8 footprint | Select only if RDS(on) < 2 Ω is mandatory and board redesign for MSOP-10 is feasible |
Compared with MAX4617EUA+ and ADG1419BRMZ, the DG418BDY offers the optimal balance of low on-resistance, industry-standard SOIC-8 compatibility, and sub-nanoampere leakage - making it the preferred choice for space-constrained, battery-operated precision instruments where layout continuity and power efficiency are prioritized over ultra-low RDS(on).
Availability
DG418BDY is available at Aetrix Electronics and suitable for precision test equipment, portable instrumentation, and military communications systems requiring stable component supply across extended production lifecycles.
Supply support for DG418BDY 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 core expertise in power management, sensing, and signal-path solutions.
The DG418BDY belongs to Vishay's precision analog switch product line, engineered specifically for high-fidelity signal routing in test & measurement, aerospace, and portable industrial instrumentation where low leakage, rail-to-rail operation, and latchup immunity are mandatory.
FAQ
What is the maximum analog signal voltage range supported by the DG418BDY?
The DG418BDY supports an analog signal range of ±15 V when operated with V+ = +15 V and V− = −15 V. This rail-to-rail capability allows undistorted switching of signals spanning the full supply range, making DG418BDY suitable for high-dynamic-range applications such as precision DAC output buffering and sensor signal conditioning in industrial control systems.
Does the DG418BDY have break-before-make functionality?
No, the DG418BDY does not implement break-before-make switching. That feature is guaranteed only for the DG419B (SPDT) variant per the datasheet. The DG418BDY is a single-pole single-throw (SPST) switch with complementary logic control - its switching action is simple ON/OFF without overlap or intentional delay between states.
What is the recommended logic supply voltage (VL) for the DG418BDY?
The DG418BDY specifies VL = 5 V for TTL/CMOS compatibility, with valid input thresholds of ≤0.8 V (logic low) and ≥2.4 V (logic high). While VL may track V+ in some designs, the datasheet characterizes all timing and leakage parameters at VL = 5 V - using other voltages risks undefined switching behavior and increased leakage in the DG418BDY.
Can the DG418BDY operate from a single 12 V supply?
Yes, the DG418BDY can operate from a single 12 V supply (V+ = 12 V, V− = 0 V), supporting analog signals from 0 V to 12 V. In this configuration, RDS(on) increases to 26 Ω typical and tON extends to 100 ns, but all key specifications remain valid and production-tested - enabling use in automotive and industrial 12 V systems without dual-rail generation.
Is the NC (pin 8) on the DG418BDY internally connected or should it be left floating?
Pin 8 of the DG418BDY is designated "No Connect" (NC) and is internally unconnected. It must remain electrically floating - no external connection, pull-up, pull-down, or grounding is permitted. Violating this requirement may compromise isolation performance or induce parasitic coupling in high-precision analog paths using the DG418BDY.
DG418BDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 13V ~ 36V
- Voltage - Supply, Dual (V±):
- ±7V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 89ns, 80ns
- -3db Bandwidth:
- -
- Charge Injection:
- 38pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG418BDY FAQ
1.How can I place an order for DG418BDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418BDY 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 DG418BDY reliable?
The price and inventory of DG418BDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418BDY is usually 5 days.
3.What payment methods are accepted for DG418BDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418BDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418BDY?
DG418BDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418BDY 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 DG418BDY?
For technical support, including DG418BDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418BDY requirements.
6.How does Aetrix verify that DG418BDY is sourced from the original manufacturer or authorized distributors?
All DG418BDY 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 DG418BDY meets industry standards.
7.What is the process for return or replacement of DG418BDY?
All DG418BDY units undergo pre-shipment inspection (PSI). If there is an issue with DG418BDY, 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 DG418BDY part is unused and in its original packaging.
Return procedure for DG418BDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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