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Vishay Siliconix DG302AAK
- Part No.:
- DG302AAK
- Manufacturer:
- Vishay Siliconix
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
DG302AAK.pdf
- Description:
- IC SW DPST-NOX2 50OHM 14CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
DG302AAK from Vishay Siliconix is a hermetically sealed, military-grade dual SPST analog switch in a 14-pin ceramic DIP package, featuring ±15 V analog signal range, 30 Ω typical on-resistance, 150 ns turn-on time, and break-before-make switching-designed for precision instrumentation and high-reliability process control systems operating from -55 °C to +125 °C.
For engineers reviewing the DG302AAK datasheet, DG302AAK pinout, DG302AAK application, or DG302AAK equivalent, this part supports rail-to-rail analog switching with CMOS/TTL-compatible digital inputs, low charge injection (8 pC), and guaranteed latch-up immunity-critical for low-error signal routing in aerospace data acquisition and programmable gain amplifier front-ends.
Technical Context
The DG302AAK implements two independent SPST switches using Vishay's PLUS-40 CMOS process with epitaxial isolation to prevent latch-up. Each channel conducts bidirectionally with no offset voltage and maintains full rail-to-rail analog swing (±15 V) when powered from dual supplies (V+ = +15 V, V− = −15 V).
It operates with logic thresholds of 0.8 V (low) and 4 V (high), supports break-before-make timing only in DG301A_MIL variants (not DG302AAK), and delivers 62 dB off-isolation and 74 dB crosstalk suppression at 500 kHz-enabling clean multiplexing in high-precision analog measurement paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V - supports full rail-to-rail signal switching without clipping in dual-supply configurations |
| Drain-Source On-Resistance | 30 Ω typ - ensures minimal signal attenuation and gain error in precision analog paths |
| Turn-On Time | 150 ns - enables fast channel selection in real-time data acquisition systems |
| Off-Leakage Current | ±100 nA max at hot temperature - preserves accuracy in high-impedance sensor interfaces |
| Charge Injection | 8 pC - limits voltage glitch on sampled nodes, critical for ADC input conditioning |
| Off-Isolation | 62 dB - suppresses crosstalk between active and inactive channels at audio frequencies |
| Supply Current | 0.5 mA max I+ - enables low-power operation in battery-backed or thermally constrained modules |
Pinout & Package
Package: 14-pin ceramic dual-in-line package (CerDIP), hermetically sealed, MIL-STD-883 qualified, metal lid grounded via case connection (V+ substrate tie).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | NC | No internal connection - must be left unconnected or tied to GND per layout best practice |
| 2, 13 | V+ | Positive supply rail (+15 V typical) - also connects to substrate/case for shielding and thermal path |
| 3, 12 | S3 / S4 | Switch source terminals for Channel 3 and 4 - bidirectional analog current path entry points |
| 4, 11 | D3 / D4 | Switch drain terminals for Channel 3 and 4 - bidirectional analog current path exit points |
| 5, 10 | D1 / D2 | Drain terminals for Channel 1 and 2 - routed to external signal nodes or multiplexer outputs |
| 6, 9 | S1 / S2 | Source terminals for Channel 1 and 2 - connect to sensors, DACs, or amplifier inputs |
| 7 | IN1 | Digital control input for Channel 1 - TTL/CMOS compatible (0.8 V low / 4 V high) |
| 8 | GND | Analog/digital reference ground - must be low-impedance and star-connected to minimize noise coupling |
| 12 | IN2 | Digital control input for Channel 2 - independent logic control enables asynchronous switching |
Key Features
| Feature | Design Value |
|---|---|
| Latch-up proof construction | Epitaxial isolation prevents destructive latch-up under overvoltage or ESD stress - essential for ruggedized avionics |
| Rail-to-rail analog conduction | Switches signals from V− to V+ with no dead zone - preserves dynamic range in ±15 V instrumentation amplifiers |
| Low power dissipation | 3.5 mW typical - reduces thermal drift and enables dense packaging in sealed modules |
| CMOS/TTL logic compatibility | Accepts 0.8 V / 4 V thresholds - interoperates directly with legacy flight computer I/O without level-shifting |
| Hermetic 14-pin CerDIP | MIL-STD-883 qualified package - ensures long-term reliability in vacuum, humidity, and thermal cycling environments |
Applications
| Aerospace Data Acquisition | Programmable Gain Amplifier |
|---|---|
Use Scenario: Multiplexing multiple transducer outputs (strain gauges, RTDs) into a single high-resolution ADC in satellite telemetry systems. IC Role / Device Role / Timing Role: Dual SPST analog switch routing conditioned sensor signals while maintaining sub-mV offset stability across temperature. Use Value: ±15 V signal range and 30 Ω rDS(on) ensure <0.02% gain error; 8 pC charge injection prevents ADC sampling glitches. | Use Scenario: Digitally selecting feedback resistor networks to set gain (1×, 10×, 100×) in a low-power instrumentation amplifier for portable test equipment. IC Role / Device Role / Timing Role: Precision analog switch enabling gain reconfiguration without mechanical relays or analog mux-induced distortion. Use Value: 62 dB off-isolation eliminates gain-setting crosstalk; 150 ns tON allows rapid gain adaptation during automated calibration sequences. |
| Process Control Signal Routing | High-Reliability Test Equipment |
Use Scenario: Isolating and routing 4–20 mA loop signals and auxiliary analog diagnostics in nuclear plant control cabinets. IC Role / Device Role / Timing Role: Hermetically sealed analog switch providing fail-safe signal path selection under continuous radiation exposure and thermal stress. Use Value: MIL-STD-883 qualification and -55 °C to +125 °C operation guarantee uninterrupted function; ±100 nA leakage avoids loop current errors. | Use Scenario: Building self-calibrating reference signal paths in metrology-grade multimeters requiring traceable, low-drift analog switching. IC Role / Device Role / Timing Role: Low-charge-injection, low-leakage switch enabling auto-zero and reference routing without introducing offset drift. Use Value: 8 pC Q and ±100 nA leakage preserve microvolt-level accuracy; 74 dB crosstalk prevents reference contamination during multi-function tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG302AAK/883 | Same die, identical electrical specs, MIL-STD-883 tested version with enhanced screening | Required for space-grade or Class H military programs where burn-in and lot acceptance testing apply | Select when full MIL-PRF-38535 compliance and radiation-hardened handling are mandated |
| DG300B Series (e.g., DG300BDY) | Pin-for-pin replacement with improved rDS(on) (25 Ω typ), lower leakage (±10 nA), but non-hermetic plastic package | Suitable for commercial/industrial use only; not rated for extended temperature or hermetic sealing | Choose for cost-sensitive, non-military designs needing higher performance in benign environments |
Compared with DG302AAK, the DG302AAK/883 offers identical functionality with certified military screening, while the DG300B Series improves on-resistance and leakage but sacrifices hermeticity and temperature range-making DG302AAK the sole choice for sealed, high-reliability analog routing where environmental robustness is non-negotiable.
Availability
DG302AAK is available at Aetrix Electronics and suitable for aerospace data acquisition, process control signal routing, and high-reliability test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG302AAK 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 leader in discrete semiconductors and passive components, specializing in high-reliability analog interface solutions for defense, aerospace, and industrial markets.
The DG300A_MIL series was designed specifically for precision analog switching in mission-critical systems demanding MIL-STD-883 qualification, latch-up immunity, and guaranteed rail-to-rail performance under extreme thermal and radiation stress.
FAQ
What is the maximum analog signal voltage supported by DG302AAK?
The DG302AAK supports a full rail-to-rail analog signal range of ±15 V when operated with dual supplies (V+ = +15 V, V− = −15 V). This is guaranteed by design and enables undistorted switching of signals spanning the entire supply rails-critical for high-fidelity instrumentation amplifier interfaces and sensor signal conditioning circuits where headroom preservation is essential. The DG302AAK must not be used with analog voltages exceeding these rails.
Does DG302AAK support single-supply operation?
Yes, DG302AAK supports single-supply operation by connecting V− to 0 V, enabling analog signal ranges from 0 V to V+ (e.g., 0–15 V). However, the datasheet notes trade-offs: increased on-resistance and slower switching speed versus dual-supply mode. Input logic thresholds remain valid (0.8 V low / 4 V high), and the analog voltage must stay within the supply rails-DG302AAK does not support signals beyond V+ or below GND in single-supply configuration.
Is DG302AAK pin-compatible with DG300B Series devices?
No, DG302AAK is not pin-compatible with the DG300B Series. DG302AAK uses a 14-pin CerDIP package with specific pin assignments including dual INx inputs and four S/D pairs, whereas DG300B devices (e.g., DG300BDY) use 16-pin SOIC or TSSOP packages with different pinouts and channel configurations. The DG300B Series is explicitly documented as a *pin-for-pin replacement for DG300A_MIL*, not DG302AAK. PCB redesign is required for substitution.
What is the meaning of "V+ (Substrate and Case)" in DG302AAK pin descriptions?
"V+ (Substrate and Case)" indicates that Pin 2 and Pin 13 of DG302AAK are electrically tied to the internal silicon substrate and the metal can/ceramic lid of the hermetic package. This provides a low-inductance thermal and shielding path, improves EMI rejection, and ensures substrate biasing for latch-up immunity. It requires careful grounding strategy: V+ must be connected to the positive supply, and the case must not float-unintended case biasing may cause leakage or malfunction.
How does DG302AAK achieve latch-up immunity?
DG302AAK achieves latch-up immunity through Vishay Siliconix's PLUS-40 CMOS process, which incorporates an epitaxial layer between the p-substrate and n-well to interrupt parasitic SCR formation. This structural isolation is verified across temperature and voltage extremes, and is a key reason DG302AAK is qualified to MIL-STD-883. Unlike standard CMOS switches, DG302AAK sustains 30 V peak-to-peak off-state blocking without triggering latch-up-even under transient overvoltage or ionizing radiation exposure common in aerospace applications.
DG302AAK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- DPST - NO
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 50Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±15V
- Switch Time (Ton, Toff) (Max):
- 300ns, 250ns
- -3db Bandwidth:
- -
- Charge Injection:
- 8pC
- Channel Capacitance (CS(off), CD(off)):
- 14pF, 14pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -74dB @ 500kHz
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CERDIP
DG302AAK FAQ
1.How can I place an order for DG302AAK through Aetrix?
Please submit a Request for Quotation (RFQ) for DG302AAK 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 DG302AAK reliable?
The price and inventory of DG302AAK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG302AAK is usually 5 days.
3.What payment methods are accepted for DG302AAK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG302AAK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG302AAK?
DG302AAK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG302AAK 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 DG302AAK?
For technical support, including DG302AAK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG302AAK requirements.
6.How does Aetrix verify that DG302AAK is sourced from the original manufacturer or authorized distributors?
All DG302AAK 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 DG302AAK meets industry standards.
7.What is the process for return or replacement of DG302AAK?
All DG302AAK units undergo pre-shipment inspection (PSI). If there is an issue with DG302AAK, 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 DG302AAK part is unused and in its original packaging.
Return procedure for DG302AAK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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