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Vishay Siliconix DG418BDY-T1
- Part No.:
- DG418BDY-T1
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG418BDY-T1.pdf
- Description:
- IC SWITCH SPST-NOX1 25OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,379
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Product details
Overview
DG418BDY-T1 from Vishay Siliconix is a precision monolithic SPST CMOS analog switch optimized for bidirectional signal routing in high-fidelity instrumentation and portable systems. It features ±15 V analog signal range, 15 Ω typical on-resistance at ±15 V supplies, 110 ns turn-on time, TTL/CMOS-compatible control logic, and operates across –40 °C to +85 °C. It serves as the active ON/OFF gate in sample-and-hold circuits and precision test equipment where low charge injection (38 pC) and minimal leakage (<±0.25 nA) are critical.
For engineers reviewing the DG418BDY-T1 datasheet, DG418BDY-T1 pinout, DG418BDY-T1 application, or DG418BDY-T1 equivalent, this page delivers verified electrical parameters, SOIC-8 package mapping, real-world use scenarios in battery-powered instrumentation, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The DG418BDY-T1 implements a single-pole, single-throw (SPST) switch architecture using Vishay's high-voltage silicon gate (HVSG) process, enabling rail-to-rail analog signal switching up to ±15 V. Its complementary control logic (active-low IN) ensures precise timing coordination with TTL/CMOS microcontrollers and FPGA I/Os.
Each channel conducts equally in both directions when ON and blocks signals up to the supply rails when OFF. An epitaxial layer prevents latch-up, and break-before-make behavior is not guaranteed-unlike the DG419B-making it suitable for non-critical signal path selection where simultaneous conduction poses no system risk.
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 typ. - minimizes signal attenuation and gain error in low-impedance sensor interfaces |
| Turn-On Time (tON) | 110 ns max. - enables sub-microsecond channel selection in automated test equipment |
| 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 on hold capacitors, critical for 14-bit+ data acquisition |
| Supply Voltage Range | V+ = 20 V, V− = −20 V - accommodates overvoltage transients in industrial environments |
| Logic Compatibility | TTL/CMOS - simplifies direct interfacing with standard digital controllers without level-shifting |
Pinout & Package
Package: 8-pin narrow SOIC (SOIC-8), JEDEC MS-012 compliant, body dimensions 4.90 mm × 3.90 mm × 1.45 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital control input | Active-low logic: switch ON when ≤ 0.8 V, OFF when ≥ 2.4 V; referenced to GND |
| 2 (S) | Analog source terminal | Bidirectional signal port; connects to sensor, DAC output, or signal source |
| 3 (D) | Analog drain terminal | Bidirectional signal port; routes switched signal to ADC input or load |
| 4 (V−) | Negative supply rail | Accepts −20 V max.; establishes lower analog signal boundary and bias reference |
| 5 (GND) | Digital ground | Reference for logic inputs and substrate; isolated from analog ground in mixed-signal layouts |
| 6 (V+) | Positive supply rail | Accepts +20 V max.; sets upper analog signal limit and powers internal switch driver |
| 7 (VL) | Logic supply voltage | Typically +5 V; powers control circuitry independently of analog rails for noise isolation |
| 8 (NC) | No connect | Internally unconnected; must remain floating-no PCB trace or via allowed |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports ±15 V signal swing without distortion-enables direct interface with op-amps and sensors operating at full supply rails |
| Low on-resistance flatness | ≤2 Ω variation over full signal range-maintains consistent gain and linearity in precision attenuators and multiplexers |
| Ultra-low off-leakage | ≤±0.25 nA at ±15.5 V - prevents capacitor discharge drift in >1 s hold-time applications |
| Low charge injection | 38 pC - reduces settling error to <1 LSB in 16-bit SAR ADC front-ends with 10 nF hold capacitors |
| High off-isolation | −82 dB at 1 MHz - suppresses crosstalk between adjacent channels in multi-channel data loggers |
Applications
| Precision Test Equipment | Precision Instrumentation |
|---|---|
Use Scenario: Automated calibration sequence in benchtop multimeters switching between reference voltage sources and DUT inputs. IC Role / Device Role / Timing Role: SPST analog gate enabling sequential connection of 10 ppm references to 24-bit sigma-delta ADC. Use Value: 15 Ω RDS(on) and ±0.25 nA leakage ensure <0.001% measurement uncertainty across 100 mV–10 V ranges. |
Use Scenario: Signal routing in portable gas chromatography analyzers selecting between multiple sensor outputs before amplification. IC Role / Device Role / Timing Role: Low-distortion analog switch isolating thermocouple, PID controller, and pressure transducer signals onto shared signal chain. Use Value: ±15 V analog range and 38 pC charge injection prevent baseline shift during fast sensor polling cycles. |
| Battery-Powered Systems | Sample-and-Hold Circuits |
Use Scenario: Power management in handheld oscilloscopes switching auxiliary power domains (analog front-end vs. display backlight). IC Role / Device Role / Timing Role: Low-quiescent-current analog switch controlling enable paths for isolated DC/DC converters. Use Value: 1 µA max. supply current (I+, I−, IL, IGND) extends runtime in Li-ion powered devices with 24/7 standby mode. |
Use Scenario: Hold-phase isolation in medical ECG front-ends capturing biopotential waveforms at 1 kSPS. IC Role / Device Role / Timing Role: Precision switch disconnecting amplifier output from hold capacitor during acquisition phase. Use Value: −82 dB off-isolation and 110 ns tON minimize aperture jitter and feedthrough-induced artifacts in 12-bit clinical-grade acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617EUA+ | Single SPST, 4.5 Ω RDS(on) at +5 V, but limited to +5.5 V analog range; no ±15 V capability | Suitable only for single-supply 3.3 V/5 V systems-not viable for bipolar instrumentation requiring ±12 V or ±15 V rails | Select when ultra-low on-resistance is prioritized over wide analog range and high-voltage tolerance |
| ADG1419BRMZ | SPDT configuration with guaranteed break-before-make; 1.3 Ω RDS(on); requires external logic inversion for DG418B-equivalent operation | Used in multiplexer designs needing channel redundancy or fail-safe switching-not drop-in for SPST-only layouts | Choose when system-level safety mandates break-before-make timing or when lower on-resistance justifies redesigning control logic |
Compared with MAX4617EUA+ and ADG1419BRMZ, the DG418BDY-T1 uniquely balances ±15 V analog range, 15 Ω on-resistance, and SOIC-8 footprint-making it optimal for legacy and new designs requiring rail-to-rail performance without layout or supply architecture changes.
Availability
DG418BDY-T1 is available at Aetrix Electronics and suitable for precision test equipment, battery-powered instrumentation, and sample-and-hold circuits requiring stable component supply across extended production lifecycles.
Supply support for DG418BDY-T1 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 expertise in high-reliability power, sensing, and signal-path solutions.
The DG418BDY-T1 belongs to the DG41xB precision analog switch family, engineered for high-voltage, low-distortion signal routing in military, aerospace, and industrial instrumentation where long-term parameter stability and latch-up immunity are mandatory.
FAQ
What is the maximum analog signal voltage supported by the DG418BDY-T1?
The DG418BDY-T1 supports analog signals from V− to V+, with absolute maximum ratings of −20 V on V− and +20 V on V+. Under normal operation with ±15 V supplies, its guaranteed analog signal range is ±15 V-enabling rail-to-rail switching without clipping in dual-supply precision systems. This specification is confirmed in the Absolute Maximum Ratings and Specification tables of Vishay Document Number 72107.
Does the DG418BDY-T1 have break-before-make functionality?
No, the DG418BDY-T1 does not guarantee break-before-make switching. That feature is explicitly specified only for the DG419B (SPDT) variant per the datasheet's Truth Table and DESCRIPTION section. The DG418BDY-T1 is an SPST device with complementary logic to DG417B, and its switching action is simple ON/OFF without timing-controlled channel separation. Designers requiring break-before-make must select DG419B or alternative SPDT switches.
What is the purpose of the VL pin on the DG418BDY-T1?
The VL pin on the DG418BDY-T1 supplies power to the internal logic control circuitry and is independent of the analog supply rails (V+ and V−). It is typically tied to +5 V and allows clean separation between digital switching thresholds and analog signal integrity. This decoupling reduces noise coupling into sensitive analog paths and ensures stable logic-level recognition even under varying analog supply conditions-confirmed in the Functional Block Diagram and Specification tables of Document 72107.
Can the DG418BDY-T1 be used with single-supply operation?
Yes, the DG418BDY-T1 supports single-supply operation. The datasheet specifies performance at V+ = 12 V, V− = 0 V, delivering 26 Ω typical RDS(on), 125 ns tON, and 0–12 V analog signal range. In this mode, V− is grounded, VL remains at +5 V, and analog signals swing from 0 V to V+. This configuration is validated in the "SPECIFICATIONS" section under "V+ = 12 V, V− = 0 V" test conditions.
Is the NC (pin 8) on the DG418BDY-T1 safe to connect to ground or leave floating?
Pin 8 (NC) on the DG418BDY-T1 is internally unconnected and must remain floating-neither grounded nor tied to any voltage. The datasheet explicitly states "No connect" and warns against routing traces or vias to this pin. Connecting it risks parasitic coupling, increased leakage, or undefined behavior due to internal die capacitance. This requirement is consistent across all DG41xB variants and documented in the Pin Configuration diagrams of Document 72107.
DG418BDY-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-T1 FAQ
1.How can I place an order for DG418BDY-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418BDY-T1 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-T1 reliable?
The price and inventory of DG418BDY-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418BDY-T1 is usually 5 days.
3.What payment methods are accepted for DG418BDY-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418BDY-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418BDY-T1?
DG418BDY-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418BDY-T1 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-T1?
For technical support, including DG418BDY-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418BDY-T1 requirements.
6.How does Aetrix verify that DG418BDY-T1 is sourced from the original manufacturer or authorized distributors?
All DG418BDY-T1 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-T1 meets industry standards.
7.What is the process for return or replacement of DG418BDY-T1?
All DG418BDY-T1 units undergo pre-shipment inspection (PSI). If there is an issue with DG418BDY-T1, 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-T1 part is unused and in its original packaging.
Return procedure for DG418BDY-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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