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Analog Devices Inc./Maxim Integrated DG411FDY+T
- Part No.:
- DG411FDY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG411FDY+T.pdf
- Description:
- IC SWITCH SPST-NCX4 35OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,077
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Product details
Overview
DG411FDY+T from Maxim Integrated is a quad SPST analog switch with normally closed (NC) configuration, fault-protected inputs, rail-to-rail signal handling, 35Ω max on-resistance at ±15V, ±36V fault protection with power on, and operation across ±4.5V to ±20V dual supplies or +9V to +36V single supply - used in industrial signal routing where overvoltage resilience and channel isolation are critical.
For engineers reviewing the DG411FDY+T datasheet, DG411FDY+T pinout, DG411FDY+T application, or DG411FDY+T equivalent, key selection criteria include fault-protection voltage limits (±40V power-off), NC-only topology, 20ns typical fault response time, leakage current <±0.25nA at +25°C, and SOIC-16 package compatibility with legacy DG411 layouts.
Technical Context
The DG411FDY+T implements dual-FET (N+P channel) parallel switching per channel to achieve low RON and true bidirectional rail-to-rail conduction. Its internal comparators continuously monitor COM/NO/NC terminals against V+ and V−, triggering immediate high-impedance isolation upon ±50mV overvoltage detection.
Fault response is polarity-agnostic: both positive and negative transients above supply rails force all FETs off within 20ns, while recovery takes 1µs (positive) or 0.5µs (negative). With power removed, all switches default to OFF and maintain ±40V fault tolerance without bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally closed (NC) - all four channels conduct when control input is logic low. |
| On-Resistance (RON) | 25Ω typ / 35Ω max at ±15V, +25°C - ensures minimal signal attenuation in precision analog paths. |
| Fault Protection | ±36V with power applied; ±40V with power off - protects downstream circuitry during hot-swap, ESD, or wiring faults. |
| Fault Response Time | 20ns typ - limits energy injection during transient overvoltage events. |
| Supply Range | ±4.5V to ±20V dual; +9V to +36V single - supports wide industrial and avionics rail configurations. |
| Logic Compatibility | TTL/CMOS thresholds (VIL = +0.8V, VIH = +2.4V) at ±15V or +12V - enables direct interface with microcontrollers and FPGA I/O. |
| Leakage Current | ±0.25nA max (COM/NO/NC off-state, +25°C) - preserves accuracy in high-impedance sensor or DAC output circuits. |
Pinout & Package
Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, 1.27mm pitch, JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | IN1–IN4 | Digital control inputs; active-low logic turns ON NC path (logic 0 = closed). |
| 2, 7, 10, 15 | COM1–COM4 | Analog common terminals - connected to NC pins when switch is enabled. |
| 3, 6, 11, 14 | NC1–NC4 | Normally closed analog terminals - conduct to COM when INx = 0; open when INx = 1. |
| 4 | V− | Negative supply rail; connect to GND for single-supply operation (+9V to +36V). |
| 5 | GND | Digital ground reference for logic inputs and internal level translators. |
| 12 | N.C. | No internal connection - must be left unconnected on PCB. |
| 13 | V+ | Positive supply rail; bypass with 0.1µF capacitor to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Signals from V− to V+ pass unattenuated - enables full dynamic range use in ±15V instrumentation front-ends. |
| No power-supply sequencing required | V+ and V− may be powered in any order - eliminates startup timing constraints in multi-rail systems. |
| All switches OFF with power off | Guaranteed high-impedance state when V+ or V− is absent - prevents backfeeding or undefined analog paths. |
| Pin-compatible with DG411 | Direct drop-in replacement for industry-standard non-fault-protected DG411 - no PCB redesign needed. |
| 20ns fault trip time | Fastest response in its class for ±36V overvoltage - reduces risk of latch-up or damage in test equipment interfaces. |
Applications
| Industrial Signal Routing | Avionics Redundancy Switching |
|---|---|
Use Scenario: Multiplexing sensor signals (RTD, thermocouple) into a shared ADC in harsh factory environments with potential ground shifts and cable faults. IC Role / Device Role / Timing Role: Fault-protected NC switch isolating each sensor path; opens only during calibration or channel selection. Use Value: Prevents ±36V transients from propagating to sensitive ADC inputs while maintaining <0.25nA leakage for sub-16-bit accuracy. |
Use Scenario: Selecting between primary and backup flight control sensors in fly-by-wire systems requiring fail-safe signal continuity. IC Role / Device Role / Timing Role: Redundant path selector with automatic fault isolation - disables faulty channel without interrupting system operation. Use Value: ±40V fault tolerance with power off ensures integrity during emergency power loss; 20ns trip time meets DO-160 Section 22 lightning surge requirements. |
| Automated Test Equipment (ATE) | Process Control I/O Conditioning |
Use Scenario: Routing DUT signals through calibration references and protection circuits in modular ATE racks with mixed-voltage fixtures. IC Role / Device Role / Timing Role: Precision analog switch enabling programmable signal path configuration with integrated overvoltage clamping. Use Value: 35Ω RON flatness (<3Ω variation) minimizes gain error across 0–10V range; 15pF off-capacitance preserves >1MHz bandwidth. |
Use Scenario: Isolating 4–20mA loop transmitters from PLC analog inputs in chemical plant control cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Input protection interface that blocks fault currents while passing nominal process signals. Use Value: ±36V fault rating exceeds IEC 61000-4-5 Level 4 surge immunity; NC topology ensures default-closed safety state during controller reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4711ESE+ | Same NC quad SPST function but rated only to ±20V fault protection; lower RON (15Ω typ) at ±15V; operates down to ±3V supplies. | Better suited for low-voltage portable instrumentation; insufficient for ±36V industrial fault environments. | Select MAX4711ESE+ only if system fault exposure is limited to ±20V and supply headroom is constrained. |
| ADG411BRZ | Pin-compatible NC quad SPST with ±40V fault protection (power off), but slower fault response (100ns) and higher RON (45Ω max). | Acceptable for non-time-critical industrial I/O; lacks 20ns response needed for fast transient suppression. | Choose ADG411BRZ when cost sensitivity outweighs need for fastest fault reaction; verify layout supports SOIC-16 footprint. |
Compared with MAX4711ESE+ and ADG411BRZ, DG411FDY+T uniquely balances ±36V live-fault resilience, 20ns trip speed, and legacy DG411 pinout - making it optimal for retrofitting robust signal routing into existing industrial and avionics platforms.
Availability
DG411FDY+T is available at Aetrix Electronics and suitable for industrial signal routing, avionics redundancy switching, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed fault-protection performance.
Supply support for DG411FDY+T 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The DG411FDY+T belongs to Maxim's fault-protected analog switch family, engineered specifically for mission-critical signal path integrity in environments prone to wiring faults, ESD, and power rail instability.
FAQ
What is the maximum allowable fault voltage on DG411FDY+T with power applied?
The DG411FDY+T supports ±36V fault voltage on COM_, NO_, or NC_ terminals when power is applied (V+ and V− active), as specified in the Absolute Maximum Ratings table. Exceeding this limit - even momentarily - risks permanent device failure. This rating holds across the full operating temperature range (−40°C to +85°C) and applies equally to all four channels of the DG411FDY+T.
Does DG411FDY+T require power-supply sequencing during startup?
No, DG411FDY+T does not require power-supply sequencing. The device operates correctly regardless of whether V+ or V− is applied first, or whether they ramp at different rates. This eliminates timing constraints in multi-rail systems and simplifies power management design for the DG411FDY+T in industrial controllers and avionics modules.
How does DG411FDY+T behave when V+ is disconnected but V− remains powered?
When V+ is disconnected while V− remains powered, all switches in the DG411FDY+T turn OFF and enter high-impedance state. This behavior is guaranteed by internal circuitry and ensures safe signal isolation - a critical feature for the DG411FDY+T in redundant systems where partial power loss must not compromise channel integrity.
Is DG411FDY+T pin-compatible with the original DG411?
Yes, DG411FDY+T has identical pinout and footprint to the non-fault-protected DG411. All IN_, COM_, NC_, V+, V−, GND, and N.C. assignments match exactly, enabling direct replacement on existing PCBs without layout changes - a key advantage of the DG411FDY+T for upgrading legacy systems with enhanced fault resilience.
What is the typical on-resistance matching between channels of DG411FDY+T?
The DG411FDY+T guarantees on-resistance matching (ΔRON) of ≤1.5Ω max between any two channels at +25°C and ±15V supplies. This tight matching ensures consistent gain and offset across multiplexed signal paths - essential for precision measurement applications using the DG411FDY+T in data acquisition front-ends.
DG411FDY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 200mOhm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 175ns, 145ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 15pF, 15pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -105dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG411FDY+T FAQ
1.How can I place an order for DG411FDY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DG411FDY+T 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 DG411FDY+T reliable?
The price and inventory of DG411FDY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG411FDY+T is usually 5 days.
3.What payment methods are accepted for DG411FDY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG411FDY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG411FDY+T?
DG411FDY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG411FDY+T 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 DG411FDY+T?
For technical support, including DG411FDY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG411FDY+T requirements.
6.How does Aetrix verify that DG411FDY+T is sourced from the original manufacturer or authorized distributors?
All DG411FDY+T 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 DG411FDY+T meets industry standards.
7.What is the process for return or replacement of DG411FDY+T?
All DG411FDY+T units undergo pre-shipment inspection (PSI). If there is an issue with DG411FDY+T, 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 DG411FDY+T part is unused and in its original packaging.
Return procedure for DG411FDY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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