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Vishay Siliconix DG485AZ/883
- Part No.:
- DG485AZ/883
- Manufacturer:
- Vishay Siliconix
- Package:
- 20-LCC
- Datasheet:
-
DG485AZ/883.pdf
- Description:
- IC SW SPST-NO/NCX8 85OHM 20LCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,406
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Product details
Overview
DG485AZ/883 from Vishay Siliconix is an octal SPST analog switch array with serial control interface, rail-to-rail analog signal handling (±15 V), 55 Ω typical on-resistance, and 170 ns typical turn-on time-designed for high-reliability data acquisition and avionics systems operating from –55 °C to +125 °C.
For engineers reviewing the DG485AZ/883 datasheet, DG485AZ/883 pinout, DG485AZ/883 application, or DG485AZ/883 equivalent, key selection criteria include MIL-PRF-38535 Class B qualification, LCC-20 hermetic package, serial daisy-chain capability, and guaranteed performance across extended temperature range without derating.
Technical Context
The DG485AZ/883 integrates an 8-bit shift register and octal latch controlled by CLK (edge-triggered), LD (level-triggered), and RS inputs-enabling precise serial programming of individual switch states. Its silicon-gate process ensures latchup immunity and supports ±44 V supply rails.
Analog channels conduct bidirectionally with matched on-resistance (ΔrDS(on) ≤ 6%), low charge injection (17 pC), and high off-isolation (–75 dB at 1 MHz). Digital logic operates at VL = 5 V with TTL/CMOS-compatible input thresholds and 10 MHz max clock frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V (rail-to-rail operation with ±15 V supplies; supports full-scale signal switching without clipping) |
| rDS(on) Typ. | 55 Ω (low on-resistance minimizes signal attenuation and gain error in precision analog paths) |
| tON / tOFF Typ. | 170 ns / 150 ns (fast switching enables multiplexing in >100 kSPS data acquisition systems) |
| Off Isolation | –75 dB at 1 MHz (high channel-to-channel isolation preserves signal integrity in multi-channel routing) |
| Charge Injection | 17 pC (low injection reduces sampling pedestal error in switched-capacitor and sample-hold circuits) |
| Supply Voltage Range | V+ = +44 V, V– = –44 V (wide bipolar supply tolerance simplifies power design in industrial and avionic systems) |
| Operating Temp. | –55 °C to +125 °C (MIL-STD-883 qualified for aerospace, defense, and downhole applications) |
Pinout & Package
LCC-20 (Leadless Chip Carrier), hermetically sealed ceramic package with 20 terminals, J-lead geometry, and center ground paddle for thermal and EMI performance. Compliant with MIL-PRF-38535 Class B screening.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | S1–S8 Source Terminals | Individual analog switch inputs; each connects to common drain D when enabled |
| 9 | CLK | Edge-triggered serial clock input; advances shift register on rising edge |
| 10 | DOUT | Serial data output; enables daisy-chaining of multiple DG485AZ/883 devices |
| 11 | LD | Level-triggered load input; latches shift register contents into octal latch on high level |
| 12 | RS | Asynchronous reset; forces all switches OFF and clears shift register on active low |
| 13 | V+ | Positive analog supply rail; supports up to +44 V; powers analog switches and internal logic |
| 14 | V– | Negative analog supply rail; supports down to –44 V; required for bipolar signal handling |
| 15 | GND | Digital ground reference; tied internally to substrate; must be connected to system ground plane |
| 16 | VL | Logic supply voltage; 4.75–5.25 V; sets TTL/CMOS input thresholds and output drive levels |
| 17 | DIN | Serial data input; accepts 8-bit control word MSB-first for switch configuration |
| 18, 19, 20 | NC | No-connect terminals; left unconnected per datasheet; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Serial daisy-chain architecture | Single DIN/DOUT interface supports expansion to N × 8 channels without additional control lines |
| Rail-to-rail analog conduction | Bidirectional current flow with equal on-resistance in both directions across full ±15 V range |
| MIL-PRF-38535 Class B qualification | Guaranteed reliability for high-availability systems including flight-critical avionics and space-grade telemetry |
| Low power dissipation | 35 nW typical quiescent power enables use in battery-backed remote sensors and portable test equipment |
| Epitaxial latchup immunity | Robust operation under transient overvoltage and ESD stress without destructive latchup events |
Applications
| Avionics Signal Routing | High-Voltage Data Acquisition |
|---|---|
|
Use Scenario: Multiplexing sensor signals (accelerometers, gyros, pressure transducers) in flight control computers where ambient temperature ranges from –55 °C to +125 °C. IC Role / Device Role / Timing Role: Octal SPST analog switch array configured via serial interface to route conditioned analog outputs to a shared ADC channel. Use Value: Eliminates mechanical relays and discrete CMOS arrays; provides guaranteed timing (tON/tOFF ≤ 275 ns max) and isolation (–75 dB) across full military temperature range. |
Use Scenario: Channel selection in 16-bit, 100 kSPS industrial DAQ modules monitoring ±10 V transducer outputs in oil & gas wellhead controllers. IC Role / Device Role / Timing Role: Serially controlled analog multiplexer enabling software-defined channel mapping without FPGA GPIO overhead. Use Value: 55 Ω rDS(on) and <17 pC charge injection preserve DC accuracy and settling time; LCC-20 package withstands vibration and thermal cycling. |
| Battery-Powered Remote Telemetry | ATE Analog Resource Switching |
|
Use Scenario: Low-power environmental monitoring node powered by Li-SOCl₂ battery, acquiring thermocouple, RTD, and strain gauge signals over 10-year deployment. IC Role / Device Role / Timing Role: Power-gated analog switch array activated only during measurement cycles to minimize system standby current. Use Value: 35 nW quiescent power and –55 °C start-up capability ensure reliable cold-weather operation; serial interface reduces PCB trace count vs parallel control. |
Use Scenario: Reconfigurable analog stimulus/sense path in semiconductor ATE systems requiring sub-100 ns switching repeatability and channel isolation >70 dB. IC Role / Device Role / Timing Role: Precision analog switch matrix used to connect DUT pins to calibrated sources, meters, and reference nodes under program control. Use Value: Matched rDS(on) (≤6% delta) and low crosstalk enable accurate ratio-metric measurements; MIL-qualified screening ensures test repeatability across production lots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal serial analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX306CPI+ | Parallel 16-channel analog multiplexer; no serial interface; ±20 V analog range; 120 Ω rDS(on); DIP-28 package | Requires 4 address lines + enable; suited for fixed-configuration systems with higher channel count but no need for daisy-chaining | Select when board layout allows parallel control and higher on-resistance is acceptable for DC-coupled signals |
| ADG508AKRZ-REEL7 | 8-channel CMOS analog multiplexer; parallel 3-bit address; ±15 V rating; 170 Ω rDS(on); SOIC-16 package; commercial temp range only | Lacks serial interface and extended temperature support; lower integration density; no daisy-chain capability | Choose for cost-sensitive industrial controls where –40 °C to +85 °C suffices and PCB space permits larger footprint |
Compared with MAX306CPI+ and ADG508AKRZ-REEL7, the DG485AZ/883 uniquely combines serial expandability, MIL-qualified temperature range, and ultra-low on-resistance in a hermetic LCC package-making it irreplaceable for compact, high-reliability avionics and downhole telemetry designs.
Availability
DG485AZ/883 is available at Aetrix Electronics and suitable for avionics signal routing, high-voltage data acquisition, and battery-powered remote telemetry requiring stable component supply, long-term obsolescence management, and traceable MIL-spec sourcing.
Supply support for DG485AZ/883 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 switching, power management, and sensing solutions for demanding environments.
The DG485AZ/883 belongs to Vishay's high-voltage analog switch family, engineered specifically for military, aerospace, and industrial applications requiring guaranteed performance across extreme temperatures and radiation-tolerant packaging.
FAQ
What is the maximum clock frequency supported by the DG485AZ/883?
The DG485AZ/883 supports a maximum clock frequency of 10 MHz under standard operating conditions (V+ = 15 V, V– = –15 V, VL = 5 V). This allows full 8-bit serial loading in under 1 μs, enabling rapid reconfiguration in real-time signal routing applications. The device maintains timing specifications across its full –55 °C to +125 °C operating range without derating.
Does the DG485AZ/883 require external pull-up or pull-down resistors on S1–S8 pins?
Yes-the DG485AZ/883 datasheet specifies that S1–S8 source terminals require 1 kΩ pull-down resistors when used in open-drain configurations (e.g., summing node applications shown in Figure 14). These resistors ensure defined logic states during switch transitions and prevent floating inputs that could cause leakage-induced errors in precision analog paths.
How does the DG485AZ/883 achieve latchup immunity?
The DG485AZ/883 achieves latchup immunity through Vishay Siliconix's proprietary high-voltage silicon gate process featuring an epitaxial layer that suppresses parasitic SCR formation. This structure is validated per MIL-PRF-38535 requirements and guarantees robust operation even under transient overvoltage conditions up to ±44 V on V+ and V– rails without destructive latchup events.
Can the DG485AZ/883 operate with unipolar supplies such as +12 V and GND?
Yes-the DG485AZ/883 supports unipolar operation with V+ = +12 V and V– = GND, enabling use in single-supply systems. In this configuration, the analog signal range is 0 V to +12 V, and the device maintains specified rDS(on) (55 Ω typ.), tON (170 ns typ.), and leakage performance. Refer to Figure 5-5 in the datasheet for rDS(on) vs. unipolar supply curves.
What is the purpose of the VL pin on the DG485AZ/883, and what voltage range is allowed?
The VL pin on the DG485AZ/883 sets the logic threshold and output drive level for digital control inputs (CLK, LD, RS, DIN). It must be supplied with 4.75 V to 5.25 V-matching standard TTL/CMOS logic families. Operating outside this range risks incorrect latch behavior or excessive input current; VL is not internally regulated and must be externally stabilized with local bypass capacitance.
DG485AZ/883 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 8
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 5.1Ohm
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±15V
- Switch Time (Ton, Toff) (Max):
- 200ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 17pC
- Channel Capacitance (CS(off), CD(off)):
- 7pF, 43pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCC (8.89x8.89)
DG485AZ/883 FAQ
1.How can I place an order for DG485AZ/883 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG485AZ/883 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 DG485AZ/883 reliable?
The price and inventory of DG485AZ/883 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG485AZ/883 is usually 5 days.
3.What payment methods are accepted for DG485AZ/883?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG485AZ/883 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG485AZ/883?
DG485AZ/883 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG485AZ/883 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 DG485AZ/883?
For technical support, including DG485AZ/883 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG485AZ/883 requirements.
6.How does Aetrix verify that DG485AZ/883 is sourced from the original manufacturer or authorized distributors?
All DG485AZ/883 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 DG485AZ/883 meets industry standards.
7.What is the process for return or replacement of DG485AZ/883?
All DG485AZ/883 units undergo pre-shipment inspection (PSI). If there is an issue with DG485AZ/883, 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 DG485AZ/883 part is unused and in its original packaging.
Return procedure for DG485AZ/883:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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