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Vishay Siliconix DG308BDY
- Part No.:
- DG308BDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG308BDY.pdf
- Description:
- IC SWITCH SPST-NOX4 85OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,680
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Product details
Overview
DG308BDY from Vishay Siliconix is a quad single-pole single-throw (SPST) normally open analog switch in 16-pin narrow SOIC package, rated for ±22 V dual-supply operation, with 45 Ω typical on-resistance, <200 ns turn-on time, and 1 pC charge injection - used in precision sample-and-hold circuits and programmable gain amplifiers where low signal distortion and high channel isolation are critical.
For engineers reviewing the DG308BDY datasheet, DG308BDY pinout, DG308BDY application, or DG308BDY equivalent, key selection criteria include guaranteed ±22 V analog signal range, bi-directional switching capability, true CMOS-compatible logic thresholds (VINH ≥ 11 V, VINL ≤ 3.5 V), and latchup immunity via epitaxial layer - all validated across –40 °C to +85 °C.
Technical Context
The DG308BDY implements four independent SPST switches fabricated in Vishay's proprietary silicon gate CMOS process, enabling lower RDS(on), reduced leakage (<20 pA), and faster switching versus legacy DG308A. Each channel features symmetrical on-resistance vs. analog voltage and clamping diodes protecting against overvoltage transients beyond V+ or V–.
Its internal level-shifted drive circuit ensures reliable switching under ±15 V supply conditions while maintaining logic compatibility with TTL/CMOS inputs. The device operates with true bi-directional signal flow in the on-state and blocks signals up to supply rails in the off-state, with off-isolation exceeding 90 dB at 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V (full rail-to-rail conduction with ±15 V supplies; supports ±22 V max rating) |
| Drain-Source On-Resistance | 45 Ω typ. (ensures minimal signal attenuation and gain error in precision instrumentation paths) |
| Charge Injection | 1 pC (limits voltage glitch in sample-and-hold hold capacitors, reducing acquisition settling error) |
| Turn-On Time | <200 ns (enables fast multiplexing in automated test equipment with sub-microsecond channel switching) |
| Off-Leakage Current | ±20 pA max. (preserves charge integrity in high-impedance sensor interfaces and long-duration hold modes) |
| Logic Input Thresholds | VINH ≥ 11 V, VINL ≤ 3.5 V (guarantees noise-immune control with standard 12/15 V logic systems) |
| Power Supply Range | ±4 V to ±22 V (supports wide dynamic range analog front-ends without level-shifting circuitry) |
Pinout & Package
Package: 16-pin narrow SOIC (JEDEC MS-012, body width 3.9 mm, pitch 1.27 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (IN1–IN4) | Digital control input | CMOS/TTL-compatible logic inputs controlling respective switch channels (high = ON for DG308BDY) |
| 5, 6, 12, 13 (S1–S4) | Source terminal | Bi-directional analog input/output node; connects to signal source in SPST configuration |
| 7, 8, 14, 15 (D1–D4) | Drain terminal | Bi-directional analog input/output node; connects to load or downstream circuitry |
| 9 (V–) | Negative supply rail | Bias reference for analog signal swing and internal level-shifter; must be connected for proper operation |
| 10 (GND) | Digital ground | Reference for logic inputs; isolated from analog ground but tied internally to substrate |
| 11 (V+) | Positive supply rail | Bias reference for analog signal swing and internal level-shifter; supports up to +22 V |
| 16 (NC) | No connect | Internally unconnected pin; must remain floating per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| Epitaxial latchup protection | Prevents destructive latchup under transient overvoltage or ESD events in industrial environments |
| Improved charge injection compensation | Reduces switching-induced voltage glitches to ≤1 pC, critical for sub-mV accuracy in data acquisition |
| True bi-directional conduction | Enables flexible signal routing without polarity constraints - usable as input or output in either direction |
| Clamped analog I/O pins | Internal diodes limit S/D/IN voltages to within 2 V of V+/V–, allowing safe operation with overvoltage transients |
| Extended temperature range | Rated for continuous operation from –40 °C to +85 °C, supporting deployment in harsh industrial enclosures |
Applications
| Precision Sample-and-Hold Circuits | Programmable Gain Amplifiers |
|---|---|
Use Scenario: Capturing and holding analog sensor outputs (e.g., thermocouple, strain gauge) for ADC conversion with minimal droop and aperture error. IC Role / Device Role / Timing Role: DG308BDY acts as the acquisition switch, enabling fast, low-glitch sampling with precise timing control via logic inputs. Use Value: 1 pC charge injection and <200 ns tON ensure ≤5 mV sample-to-hold offset and 1 µs aperture time - meeting MIL-STD-883 Class B requirements. | Use Scenario: Digitally selecting feedback resistor networks in op-amp configurations to achieve discrete gain steps (e.g., ×1, ×10, ×100). IC Role / Device Role / Timing Role: DG308BDY serves as digitally controlled gain-path selector, isolating unused resistors to prevent parasitic loading. Use Value: 45 Ω RDS(on) and 95 dB crosstalk minimize gain error and inter-channel interference across 4 gain stages. |
| Automated Test Equipment (ATE) Multiplexers | Industrial Process Control Signal Routing |
Use Scenario: Switching multiple DUT (device-under-test) signals into shared measurement resources (DMM, oscilloscope inputs) in benchtop or rack-mounted ATE. IC Role / Device Role / Timing Role: DG308BDY functions as a high-voltage, low-leakage multiplexer channel, handling ±15 V sensor excitation and response signals. Use Value: ±22 V rating and <20 pA off-leakage preserve signal fidelity across 100+ channel scan sequences without calibration drift. | Use Scenario: Routing analog outputs from PLC modules to field actuators (valves, drivers) while maintaining galvanic separation between control and power domains. IC Role / Device Role / Timing Role: DG308BDY provides isolated, logic-controlled signal path selection in distributed I/O subsystems with mixed 0–10 V / ±10 V standards. Use Value: Bi-directional operation and rail-to-rail analog range support both sourcing and sinking configurations without external buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618ESE+ | Lower RDS(on) (0.7 Ω typ.), but limited to ±5.5 V supply; no ±22 V capability | Suitable only for low-voltage portable instruments, not industrial ±15 V systems | Select when ultra-low on-resistance is prioritized over high-voltage range |
| ADG1404BRUZ | 4-channel SPST, ±15 V rating, but higher charge injection (3.5 pC) and slower tON (120 ns) | Acceptable for general-purpose multiplexing where sub-nanocoulomb precision is not required | Choose when footprint compatibility with TSSOP-16 is needed and 1 pC is not mandatory |
Compared with MAX4618ESE+ and ADG1404BRUZ, the DG308BDY uniquely delivers ±22 V tolerance, 1 pC charge injection, and proven latchup immunity - making it the only option among the three qualified for high-reliability industrial instrumentation with wide-swing analog signals.
Availability
DG308BDY is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and precision data acquisition systems requiring stable component supply across extended temperature ranges and high-voltage analog signal integrity.
Supply support for DG308BDY 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 MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG308BDY belongs to Vishay's DG308B/DG309B family of improved quad CMOS analog switches, designed specifically for high-accuracy, high-voltage signal routing in industrial and test equipment where low leakage, low glitch, and latchup immunity are non-negotiable.
FAQ
What is the maximum analog signal voltage the DG308BDY can handle?
The DG308BDY supports analog signals up to ±22 V, with guaranteed operation across ±15 V (V+ = +15 V, V– = –15 V). Its absolute maximum rating allows V+ to V– differential of 44 V, and individual terminals tolerate (V–) –2 V to (V+) +2 V due to internal clamping diodes - making DG308BDY suitable for high-dynamic-range industrial sensor interfaces without external protection.
Does the DG308BDY require dual supplies to operate, or can it run from a single supply?
The DG308BDY supports both dual-supply (e.g., ±15 V) and single-supply (e.g., 0 V to +12 V) operation. In single-supply mode, its analog signal range is 0 V to V+, with RDS(on) increasing to 90 Ω typ. and tON extending to 300 ns - verified in the datasheet's single-supply specifications table. DG308BDY maintains full functionality and logic compatibility in either configuration.
How does the DG308BDY differ from the older DG308A version?
The DG308BDY is an enhanced revision of the DG308A, featuring lower on-resistance (45 Ω vs. 60 Ω typ.), reduced leakage (20 pA vs. 100 pA max), faster switching (<200 ns vs. <300 ns), and improved charge injection (1 pC vs. 5 pC). It also adds epitaxial latchup protection and tighter parameter distributions - all confirmed in Vishay's Rev. G datasheet (Document #70047) as direct improvements over the DG308A baseline.
Is the DG308BDY pin-compatible with the DG309BDY?
Yes, the DG308BDY and DG309BDY share identical pinouts and package dimensions (16-pin narrow SOIC), differing only in functional behavior: DG308BDY is normally open (logic high = ON), while DG309BDY is normally closed (logic high = OFF). This allows direct substitution in layouts where logic inversion is accommodated - confirmed by Vishay's ordering table and functional block diagram in Document #70047.
What is the thermal derating behavior of the DG308BDY in SOIC package?
In its 16-pin narrow SOIC package, the DG308BDY has a power dissipation limit of 640 mW at 75 °C ambient, with linear derating of 7.6 mW/°C above that temperature. At 105 °C ambient, maximum allowable power drops to 426 mW - calculated as 640 mW – (7.6 mW/°C × 30 °C). This derating curve is explicitly specified in the Absolute Maximum Ratings table of the DG308BDY datasheet (Document #70047, page 3).
DG308BDY 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:
- 4
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.7Ohm
- Voltage - Supply, Single (V+):
- 4V ~ 44V
- Voltage - Supply, Dual (V±):
- ±4V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 200ns, 150ns
- -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
DG308BDY FAQ
1.How can I place an order for DG308BDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG308BDY 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 DG308BDY reliable?
The price and inventory of DG308BDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG308BDY is usually 5 days.
3.What payment methods are accepted for DG308BDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG308BDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG308BDY?
DG308BDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG308BDY 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 DG308BDY?
For technical support, including DG308BDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG308BDY requirements.
6.How does Aetrix verify that DG308BDY is sourced from the original manufacturer or authorized distributors?
All DG308BDY 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 DG308BDY meets industry standards.
7.What is the process for return or replacement of DG308BDY?
All DG308BDY units undergo pre-shipment inspection (PSI). If there is an issue with DG308BDY, 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 DG308BDY part is unused and in its original packaging.
Return procedure for DG308BDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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