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Vishay Siliconix DG309BDJ
- Part No.:
- DG309BDJ
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
DG309BDJ.pdf
- Description:
- IC SWITCH SPST-NCX4 85OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
DG309BDJ from Vishay Siliconix is a quad single-pole single-throw (SPST) analog switch with normally closed (NC) configuration, designed for precision signal routing in ±15 V dual-supply or 12 V single-supply systems. It delivers 45 Ω typical on-resistance, <200 ns turn-on time, 1 pC charge injection, ±22 V analog signal range, and 20 pA drain on-leakage at room temperature.
For engineers reviewing the DG309BDJ datasheet, DG309BDJ pinout, DG309BDJ application, or DG309BDJ equivalent, key selection criteria include bi-directional analog signal handling up to ±22 V, low glitching in sample-and-hold circuits, CMOS-compatible logic thresholds (≤3.5 V low, ≥11 V high), and compatibility with industrial instrumentation, test equipment, and communications systems requiring stable analog switching performance.
Technical Context
The DG309BDJ implements four independent NC switches fabricated in Vishay's silicon gate CMOS process, featuring epitaxial layer latchup protection and improved charge injection compensation to minimize transients during switching. Each channel supports true bi-directional conduction when on and blocks signals to supply rails when off.
It operates across -40 °C to +85 °C with guaranteed continuous supply range of ±4 V to ±22 V (dual) or 4 V to 44 V (single), and uses internal level-shifting circuitry to translate TTL/CMOS logic inputs into gate drive signals compatible with the high-voltage analog path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V (dual supply); enables full-range routing of bipolar sensor or audio signals without clipping |
| On-Resistance (RDS(on)) | 45 Ω typ. at ±15 V; ensures minimal gain error and voltage drop in precision amplifier gain-switching networks |
| Charge Injection | 1 pC typ.; limits voltage step error in sample-and-hold circuits to sub-mV levels with 1 nF hold capacitors |
| Turn-On Time (tON) | <200 ns; supports multiplexing of signals up to ~2 MHz without significant timing skew |
| Drain On-Leakage (ID(on)) | 20 pA max. at ±14 V; preserves DC accuracy in high-impedance sensor front-ends and integrator applications |
| Off-Isolation (OIRR) | 90 dB at 100 kHz; suppresses crosstalk between adjacent channels in multi-channel data acquisition systems |
| Logic Input Thresholds | VINL ≤ 3.5 V, VINH ≥ 11 V; ensures robust interfacing with standard TTL and CMOS controllers without level shifters |
Pinout & Package
Package: 16-pin plastic DIP (Dual-In-Line), JEDEC MS-012 compliant, 0.300-inch wide body, through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Digital Input (IN1–IN4) | Active-high control lines; logic high enables switch closure (NC function) |
| 5, 6, 11, 12 | Source (S1–S4) | Normally connected to output/load side; carries bidirectional analog current when closed |
| 7, 8, 15, 16 | Drain (D1–D4) | Normally connected to input/source side; completes analog path to Sx when switch is closed |
| 9 | GND | Logic ground reference; separate from analog power grounds to reduce digital noise coupling |
| 10 | V− | Negative analog supply rail; must be decoupled locally for stable switching performance |
| 13 | V+ | Positive analog supply rail; supplies bias for internal level shifter and switch channel operation |
| 14 | NC | No connect; internally unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Normally Closed (NC) Configuration | Ensures default signal continuity during power-up or controller reset-critical for fail-safe hold functions in sample-and-hold circuits |
| ±22 V Supply Rating | Supports direct interface with industrial sensors and legacy instrumentation operating beyond standard ±15 V rails |
| Low Glitch Energy (1 pC) | Minimizes transient voltage spikes at switch transition, reducing need for post-switch filtering in precision measurement paths |
| Latchup-Protected Epitaxial Process | Guarantees immunity to destructive latchup under overvoltage or ESD stress-essential for rugged test equipment environments |
| Bi-Directional Analog Path | Enables flexible signal routing regardless of source/sink orientation-simplifies PCB layout in multi-function instrument designs |
Applications
| Industrial Instrumentation | Test Equipment |
|---|---|
Use Scenario: Multiplexing multiple sensor inputs (thermocouples, strain gauges) into a shared ADC channel while maintaining DC accuracy and low thermal EMF. IC Role / Device Role / Timing Role: DG309BDJ acts as a precision analog multiplexer with NC default state, ensuring sensor bias continuity during controller initialization. Use Value: 20 pA leakage and 45 Ω RDS(on) preserve microvolt-level resolution; ±22 V rating accommodates isolated sensor excitation supplies. | Use Scenario: Configuring programmable gain stages in automated test equipment (ATE) amplifiers using switched feedback resistors. IC Role / Device Role / Timing Role: DG309BDJ serves as a low-glitch, low-RDS(on) relay replacement for gain-selection switches in high-speed calibration sequences. Use Value: 1 pC charge injection prevents gain-step-induced offset errors; <200 ns tON enables sub-microsecond reconfiguration between test vectors. |
| Disk Drive Read/Write Circuits | Portable Medical Instruments |
Use Scenario: Routing head preamplifier outputs to channel selection logic in HDD servo control ASICs. IC Role / Device Role / Timing Role: DG309BDJ provides fail-safe signal path continuity (NC) during power sequencing and logic reset events in disk drive actuator control loops. Use Value: Epitaxial latchup protection withstands transient overvoltages common in motor-driven storage subsystems; 90 dB off-isolation prevents cross-talk between read/write channels. | Use Scenario: Isolating ECG electrode inputs during lead-off detection or auto-ranging in battery-powered patient monitors. IC Role / Device Role / Timing Role: DG309BDJ functions as a low-power, high-isolation analog switch enabling dynamic input configuration without compromising signal integrity. Use Value: 5 µA max supply current extends battery life; ±22 V rating supports defibrillation-safe isolation margins; TSSOP-compatible footprint allows compact layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4674ESE+ | Single-supply only (2.7 V to 5.5 V); 35 Ω RDS(on); 0.5 pC charge injection; SOIC-16 package | Optimized for low-voltage portable systems; lacks ±22 V capability and NC default state | Select when operating from 3.3 V/5 V rails and ultra-low charge injection is prioritized over high-voltage range |
| ADG1404BRUZ | Quad SPST, NC; ±15 V rating; 4.7 Ω RDS(on); 12 pC charge injection; TSSOP-16 | Lower on-resistance but higher glitch energy; requires external logic inversion for TTL compatibility | Choose for ultra-low distortion in audio or RF signal paths where supply range matches ±15 V and board space permits TSSOP |
Compared with MAX4674ESE+ and ADG1404BRUZ, the DG309BDJ uniquely combines NC default behavior, ±22 V analog tolerance, and sub-200 ns switching in a through-hole DIP package-making it optimal for industrial and test equipment where robustness, fail-safe operation, and legacy board compatibility are critical.
Availability
DG309BDJ is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and communications systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG309BDJ 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 DG309BDJ belongs to Vishay's DG30xB series of improved quad analog switches, engineered specifically for high-reliability industrial and test instrumentation where low leakage, high voltage tolerance, and fail-safe NC operation are mandatory design requirements.
FAQ
What is the maximum analog signal voltage the DG309BDJ can handle?
The DG309BDJ supports analog signals up to ±22 V relative to its V+ and V− supplies, as confirmed by Absolute Maximum Ratings and functional specifications. This allows safe operation with input signals exceeding standard ±15 V rails-critical for interfacing with industrial sensors and legacy instrumentation. The device clamps signals exceeding V+ or V− via internal diodes, provided forward current remains within 30 mA limits.
Does the DG309BDJ require dual supplies, or can it operate from a single supply?
The DG309BDJ supports both dual-supply (±4 V to ±22 V) and single-supply (4 V to 44 V) operation, as specified in the Power Supply Range for Continuous Operation parameter. In single-supply mode with V− = 0 V, the analog signal range is 0 V to V+, enabling use in battery-powered or 3.3 V/5 V system interfaces-though RDS(on) increases to 90 Ω typ. and charge injection rises to 4 pC.
How does the DG309BDJ differ from the DG308BDJ in functionality?
The DG309BDJ is a normally closed (NC) quad SPST switch, while the DG308BDJ is normally open (NO). Their truth tables are complementary: logic high turns DG309BDJ ON (closes path), whereas logic high turns DG308BDJ ON. Both share identical electrical specs (RDS(on), leakage, speed), package, and pinout-enabling direct substitution where NC vs. NO behavior aligns with system safety or power-up requirements.
What is the purpose of the NC (no-connect) pin on the DG309BDJ?
Pin 14 of the DG309BDJ is designated NC (no connect) and is internally unconnected. Per Vishay's package documentation, it must remain electrically floating-neither tied to ground nor supply-to avoid unintended parasitic coupling or thermal stress. This pin exists for mechanical symmetry in the 16-pin DIP layout and has no functional role in circuit operation or timing.
Can the DG309BDJ be used in sample-and-hold circuits, and what performance metrics support this?
Yes, the DG309BDJ is explicitly validated for sample-and-hold applications, as shown in Figure 7 of its datasheet. Its 1 pC charge injection limits aperture error to <1 mV with a 1 nF hold capacitor, while <200 ns tON and 20 pA ID(on) ensure fast acquisition and minimal droop. The NC default state also guarantees automatic hold activation during controller reset-enhancing reliability in data acquisition systems.
DG309BDJ 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):
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
DG309BDJ FAQ
1.How can I place an order for DG309BDJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309BDJ 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 DG309BDJ reliable?
The price and inventory of DG309BDJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309BDJ is usually 5 days.
3.What payment methods are accepted for DG309BDJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309BDJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309BDJ?
DG309BDJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309BDJ 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 DG309BDJ?
For technical support, including DG309BDJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309BDJ requirements.
6.How does Aetrix verify that DG309BDJ is sourced from the original manufacturer or authorized distributors?
All DG309BDJ 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 DG309BDJ meets industry standards.
7.What is the process for return or replacement of DG309BDJ?
All DG309BDJ units undergo pre-shipment inspection (PSI). If there is an issue with DG309BDJ, 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 DG309BDJ part is unused and in its original packaging.
Return procedure for DG309BDJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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