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Vishay Siliconix DG271AK
- Part No.:
- DG271AK
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
DG271AK.pdf
- Description:
- IC SW SPST-NCX4 50OHM 16CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
DG271AK from Vishay Siliconix is a high-speed quad SPST CMOS analog switch in 16-pin CerDIP package, featuring 55 ns turn-on time, 32 Ω rDS(on), 5 pC charge injection, and ±15 V dual supply operation. It serves as precision signal routing element in flight control systems and automatic test equipment where low leakage (50 pA) and fast settling are critical.
For engineers reviewing the DG271AK datasheet, DG271AK pinout, DG271AK application, or DG271AK equivalent, this page delivers verified electrical parameters, military-grade temperature range (–55°C to +125°C), package-specific thermal derating, and validated alternatives for high-reliability analog switching designs.
Technical Context
The DG271AK implements four independent single-pole single-throw analog switches using Vishay's high-voltage metal-gate CMOS process, enabling rail-to-rail analog signal handling from –15 V to +15 V. Its TTL/CMOS-compatible digital inputs accept logic thresholds of 0.8 V (low) and 2.4 V (high) across full temperature range.
Switching performance is optimized via low channel capacitance (CD(on) = 30 pF), high off-isolation (85 dB at 100 kHz), and minimal crosstalk (100 dB). Charge injection of 5 pC ensures accurate sample-and-hold operation without significant pedestal error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rDS(on) | 32 Ω typical at VD = 10 V, IS = 1 mA - enables low insertion loss in precision gain-switching circuits |
| tON / tOFF | 55 ns / 50 ns typical - supports >10 MHz switching in high-speed data acquisition paths |
| Charge Injection | 5 pC - limits voltage step error in sample/hold amplifiers with 1 nF hold capacitors |
| Off-Leakage Current | ±60 nA max over –55°C to +125°C - preserves DC accuracy in high-impedance sensor interfaces |
| Analog Signal Range | –15 V to +15 V - accommodates full dual-supply op amp output swing without clipping |
| Supply Voltage Range | V+ to V– = 44 V max - allows operation with ±15 V, ±12 V, or asymmetric rails up to +20 V/–24 V |
| Power Dissipation | 900 mW at ≤75°C, derated 12 mW/°C above - defines thermal margin in sealed avionics enclosures |
Pinout & Package
Package: 16-pin Ceramic Dual In-line Package (CerDIP), hermetically sealed, MIL-STD-883 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 15, 16 | IN1–IN4 | Digital control inputs; TTL/CMOS compatible, drive internal gate logic for respective switch |
| 3, 4, 13, 14 | D1–D4 | Drain terminals - analog outputs connected to load or next stage |
| 5, 6, 11, 12 | S1–S4 | Source terminals - analog inputs routed through closed switch path |
| 7 | V– | Negative supply rail - must be connected to system negative reference, supports –15 V operation |
| 8 | V+ | Positive supply rail - supports +15 V operation; powers internal level shifters and switch drivers |
| 9 | GND | Analog/digital common reference - separate from power supply return; critical for noise isolation |
| 10 | NC | No connect - internally unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| High-Speed Switching | 55 ns tON enables real-time multiplexing in 10+ MSPS data converters |
| Low Charge Injection | 5 pC minimizes hold-step error in precision sample-and-hold circuits |
| Military Temperature Range | –55°C to +125°C operation certified per MIL-STD-883, suitable for aerospace deployment |
| Low On-Resistance Match | Channel-to-channel rDS(on) variation <10% - maintains gain accuracy in multi-channel op amp switching |
| High Off-Isolation | 85 dB at 100 kHz prevents signal coupling between inactive channels in dense PCB layouts |
Applications
| Flight Control Systems | Automatic Test Equipment |
|---|---|
Use Scenario: Routing sensor feedback signals (gyro, accelerometer) to ADCs in triple-redundant flight computers. IC Role / Device Role / Timing Role: Quad SPST analog switch providing fault-isolated signal path selection with sub-100 ns timing resolution. Use Value: 50 pA leakage ensures <1 µV offset drift over temperature, preserving closed-loop stability margins. | Use Scenario: Multiplexing calibration references and DUT signals in automated semiconductor testers. IC Role / Device Role / Timing Role: Precision analog switch enabling rapid channel scanning without settling-induced measurement error. Use Value: 5 pC charge injection limits hold capacitor voltage disturbance to <50 µV, meeting Class I metrology requirements. |
| Digital Filters | Op Amp Gain Switching |
Use Scenario: Configuring switched-capacitor filter coefficients in programmable anti-aliasing stages. IC Role / Device Role / Timing Role: Low-rDS(on) analog switch controlling capacitor network topology during filter reconfiguration. Use Value: 32 Ω on-resistance ensures <0.1% gain error in 10 kΩ feedback networks at 100 kHz. | Use Scenario: Selecting discrete gain-setting resistors in programmable instrumentation amplifiers. IC Role / Device Role / Timing Role: High-precision SPST switch inserting calibrated resistors into op amp feedback loops. Use Value: Channel matching <10% rDS(on) maintains gain consistency across all 4 gain ranges within ±0.25%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG201AKRZ | 44 V max supply, 60 ns tON, 10 pC charge injection, SOIC-16 package | Lacks MIL-STD-883 qualification; not rated for –55°C to +125°C operation | Select when commercial-grade reliability suffices and board space favors surface-mount |
| MAX318AKN+ | ±18 V supply, 75 ns tON, 8 pC charge injection, 16-pin PDIP package | Higher rDS(on) (60 Ω), no military temp rating; RoHS-compliant but non-hermetic | Select when extended supply range is needed and leakage tolerance >100 pA is acceptable |
Compared with ADG201AKRZ and MAX318AKN+, the DG271AK provides superior temperature robustness, lower charge injection, and hermetic sealing-critical for flight-critical signal routing where long-term parameter stability under thermal cycling is mandatory.
Availability
DG271AK is available at Aetrix Electronics and suitable for flight control systems, automatic test equipment, and precision instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for DG271AK 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, specializing in high-reliability analog switches, MOSFETs, and diodes for aerospace, defense, and industrial markets.
The DG271AK belongs to Vishay's military-grade analog switch family, engineered specifically for high-precision, high-speed signal routing in safety-critical systems operating under extreme environmental stress.
FAQ
What is the maximum allowable supply voltage for DG271AK?
The DG271AK supports V+ to V– differential voltage up to 44 V, with absolute maximum ratings of GND to V– = 25 V and V+ to GND = 25 V. For standard ±15 V operation, the device delivers guaranteed rDS(on) ≤75 Ω and tON ≤80 ns across –55°C to +125°C. Exceeding these limits risks permanent damage to internal protection diodes and gate oxides.
Does DG271AK require external pull-up or pull-down resistors on its digital inputs?
No, DG271AK digital inputs (IN1–IN4) are TTL/CMOS compatible and do not require external biasing. Input thresholds are specified at 0.8 V (low) and 2.4 V (high) with input current ≤10 µA across temperature. External resistors may degrade switching speed and increase power consumption without improving noise immunity in properly routed layouts.
How does DG271AK handle analog signals exceeding the supply rails?
DG271AK includes internal clamping diodes between S/D pins and V+/V–. Signals exceeding V+ or falling below V– forward-bias these diodes, limiting excursion to ~0.7 V beyond rails. To avoid excessive current, external series resistance must limit peak diode current to ≤20 mA - critical when interfacing with overvoltage-prone sensors or legacy equipment.
Is DG271AK pin-compatible with the commercial DG271B variant?
No, DG271AK uses a 16-pin CerDIP package while DG271B is offered in 16-pin plastic DIP and SOIC packages. Although functional and electrical specifications align closely, the CerDIP lead pitch (0.3 inch) and hermetic sealing differ from plastic variants. PCB layout and thermal management must be redesigned for DG271AK integration.
What is the thermal derating behavior of DG271AK above 75°C?
DG271AK in CerDIP package has a power dissipation limit of 900 mW at ≤75°C, derated linearly at 12 mW/°C above that point. At 125°C ambient, maximum allowable power drops to 300 mW. This requires careful thermal design in sealed avionics enclosures - including copper pour area, thermal vias, and proximity to airflow - to maintain junction temperature below 150°C.
DG271AK 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):
- 50Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±15V
- Switch Time (Ton, Toff) (Max):
- 65ns, 65ns
- -3db Bandwidth:
- -
- Charge Injection:
- -5pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -100dB @ 100kHz
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-CERDIP
DG271AK FAQ
1.How can I place an order for DG271AK through Aetrix?
Please submit a Request for Quotation (RFQ) for DG271AK 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 DG271AK reliable?
The price and inventory of DG271AK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG271AK is usually 5 days.
3.What payment methods are accepted for DG271AK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG271AK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG271AK?
DG271AK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG271AK 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 DG271AK?
For technical support, including DG271AK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG271AK requirements.
6.How does Aetrix verify that DG271AK is sourced from the original manufacturer or authorized distributors?
All DG271AK 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 DG271AK meets industry standards.
7.What is the process for return or replacement of DG271AK?
All DG271AK units undergo pre-shipment inspection (PSI). If there is an issue with DG271AK, 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 DG271AK part is unused and in its original packaging.
Return procedure for DG271AK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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