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Analog Devices Inc./Maxim Integrated DG411FDY+
- Part No.:
- DG411FDY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG411FDY+.pdf
- Description:
- IC SWITCH SPST-NCX4 35OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,144
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Product details
Overview
DG411FDY+ 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. It serves in high-reliability signal routing for industrial control and avionics where overvoltage resilience is critical.
For engineers reviewing the DG411FDY+ datasheet, DG411FDY+ pinout, DG411FDY+ application, or DG411FDY+ equivalent, key selection considerations include its NC-only topology, fault-trip threshold of V− − 0.4V to V+ + 0.4V, 20ns typical fault turn-off delay, matched RON ≤ 1.5Ω between channels, and compatibility with TTL/CMOS logic under ±15V or +12V supply conditions.
Technical Context
The DG411FDY+ employs dual parallel FETs (N- and P-channel) per switch to achieve low on-resistance and true bidirectional rail-to-rail conduction. Its internal comparators continuously monitor COM_, NO_, and NC_ terminals against V+ and V−, disabling both FETs within 20ns when voltage exceeds V+ + 0.4V or falls below V− − 0.4V.
Fault protection remains active with power off (±40V tolerance), and all switches default to OFF state when V+ is unpowered-even if V− is active. The device requires no power-supply sequencing and supports break-before-make timing only in DG413F variants, not applicable to DG411FDY+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally closed (NC) - all four switches conduct when control input is logic low. |
| On-Resistance (RON) | 25Ω typical / 35Ω max at ±15V, +25°C - ensures minimal signal attenuation in precision analog paths. |
| RON Match | ≤ 1.5Ω max between channels at +25°C - enables matched gain/phase in multi-channel instrumentation. |
| Fault Protection | ±36V with power on, ±40V with power off - protects downstream circuitry from transient overvoltages without external clamping. |
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports legacy ±15V systems and modern high-voltage industrial rails. |
| Logic Compatibility | TTL/CMOS thresholds (VIL = 0.8V, VIH = 2.4V) at ±15V or +12V - eliminates level-shifting in mixed-signal control interfaces. |
| Turn-On/Off Time | 70–220ns tON, 55–160ns tOFF at ±15V - suitable for medium-speed data acquisition and test equipment switching. |
Pinout & Package
Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, JEDEC MS-012AC outline, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | IN1–IN4 | Digital control inputs; logic low closes respective NC switch, logic high opens it. |
| 2, 7, 10, 15 | COM1–COM4 | Analog common terminals - connected to NC pins when switch is ON; high-impedance during fault. |
| 3, 6, 11, 14 | NC1–NC4 | Normally closed analog terminals - conduct to COM when INx = low; fault-protected up to ±40V. |
| 4 | V− | Negative supply rail; connect to GND for single-supply operation; bypass with 0.1µF capacitor. |
| 5 | GND | Digital ground reference for logic inputs and internal translators; isolated from analog signal paths. |
| 12 | N.C. | No internal connection - must remain unconnected on PCB. |
| 13 | V+ | Positive supply rail; bypass with 0.1µF capacitor; sets logic thresholds and powers internal comparators. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Signals from V− to V+ pass unattenuated in either direction - preserves full dynamic range in ±15V sensor interfaces. |
| Fault-protected terminals | All COM_, NC_, and IN_ pins withstand ±40V faults with power off - eliminates need for external TVS diodes in harsh environments. |
| No supply sequencing required | V+ and V− may be powered in any order - simplifies power management in multi-rail systems and avoids latch-up risk. |
| Automatic power-off disable | All switches turn OFF when V+ is unpowered, regardless of V− state - prevents backfeeding and ensures safe shutdown. |
| Low charge injection | 5pC typical - minimizes voltage glitch on sampled-hold nodes in precision ADC front-ends. |
Applications
| Industrial Process Control | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing sensor outputs (e.g., RTD, thermocouple) into a shared ADC channel under EMI-prone factory conditions. IC Role / Device Role / Timing Role: Fault-protected analog switch isolating each sensor path; NC topology ensures default connectivity during controller boot-up. Use Value: ±36V fault tolerance prevents latch-up during motor drive transients; 1.5Ω RON match maintains channel-to-channel gain consistency across 4-input mux. |
Use Scenario: Redundant flight control signal selection between primary and backup sensors in fly-by-wire systems. IC Role / Device Role / Timing Role: Quad NC switch enabling fail-safe default signal path; fault response time <20ns meets DO-160 Section 22 lightning-induced transient requirements. Use Value: Power-off fault protection (±40V) safeguards integrity during emergency battery-only operation; rail-to-rail support handles ±10V synchro signals without clipping. |
| Automated Test Equipment (ATE) | Medical Data Acquisition |
Use Scenario: High-voltage stimulus routing in semiconductor parametric testers where DUTs may generate ±30V transients. IC Role / Device Role / Timing Role: SPST switch matrix element; NC configuration provides known-closed state before test initialization commands. Use Value: 35Ω max RON ensures <0.1% gain error in 100kΩ source impedance paths; fault recovery time <1µs enables rapid retest after overvoltage event. |
Use Scenario: Isolating EEG/ECG electrode inputs from patient-connected circuits during calibration or fault conditions. IC Role / Device Role / Timing Role: Safety-isolated analog switch; fault protection prevents hazardous leakage currents exceeding IEC 60601-1 CF-rated limits. Use Value: <0.25nA COM_ on-leakage at ±10V ensures <1µV offset drift in 10MΩ bio-amplifier inputs; GND isolation eliminates ground loop risks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4711ESE+ | Pin-compatible quad NC switch but rated only for ±5V/5V supplies; lacks ±36V fault protection and rail-to-rail operation. | Suitable for low-voltage portable instruments (<5V), not for industrial ±15V or avionics ±28V systems. | Select DG411FDY+ when fault resilience beyond ±10V or operation above ±5V is required. |
| ADG411BRZ | Quad NC switch with 35Ω RON but no integrated fault protection; requires external ±40V clamping diodes and current limiting. | Used in cost-sensitive designs where board space allows discrete protection components. | Choose DG411FDY+ to eliminate external protection circuitry, reduce BOM count, and guarantee fault response timing. |
Compared with MAX4711ESE+ and ADG411BRZ, DG411FDY+ uniquely integrates ±36V fault protection, rail-to-rail operation, and automatic power-off disable in a drop-in SOIC package-reducing system-level design effort while meeting stringent reliability requirements in industrial and aerospace applications.
Availability
DG411FDY+ is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for DG411FDY+ 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) is a leader in high-performance analog, mixed-signal, and power management ICs, serving industrial, automotive, communications, and medical markets since 1983.
The DG411FDY+ belongs to Maxim's fault-protected analog switch family, designed specifically for mission-critical signal routing where overvoltage resilience, rail-to-rail fidelity, and guaranteed fail-safe behavior are non-negotiable.
FAQ
What is the fault protection rating of DG411FDY+ with power applied?
DG411FDY+ provides ±36V fault protection on all COM_, NC_, and IN_ terminals when power is applied - verified under ±15V supply conditions per the official datasheet Absolute Maximum Ratings table. This rating applies regardless of whether the switch is open or closed, and is independent of load resistance. Exceeding ±36V during powered operation risks permanent damage.
Does DG411FDY+ support single-supply operation, and what is the minimum voltage?
Yes, DG411FDY+ supports single-supply operation with V− connected to GND and V+ ranging from +9V to +36V. At +9V, on-resistance remains within specification (≤45Ω max), and logic inputs retain TTL/CMOS compatibility with VIL ≤ 0.8V and VIH ≥ 2.4V. Operation below +9V is not characterized or guaranteed.
How does DG411FDY+ behave when V+ is unpowered but V− remains active?
DG411FDY+ turns all four switches OFF immediately when V+ is unpowered, even if V− is present - a core safety feature confirmed in the Detailed Description section. During this condition, COM_, NC_, and IN_ terminals maintain ±40V fault protection, and leakage current stays below ±1µA, ensuring no unintended signal coupling or backfeeding into upstream circuitry.
Is DG411FDY+ pin-compatible with the legacy DG411 non-fault-protected switch?
Yes, DG411FDY+ has identical pinout and footprint to the industry-standard DG411, as explicitly stated in the General Description and Pin Configurations sections. This enables direct replacement on existing PCBs without layout changes - provided the system can accommodate the slightly higher supply current (up to 600µA at ±15V) and verify fault-protection interface compatibility.
What is the maximum continuous current rating per terminal of DG411FDY+?
The maximum continuous current rating for any terminal (COM_, NC_, or IN_) of DG411FDY+ is ±30mA, as specified in the Absolute Maximum Ratings table. This limit applies under steady-state DC conditions at TA ≤ +70°C. Peak pulsed current up to ±100mA is allowed at 1ms duration and 10% duty cycle, but thermal derating must be applied above +70°C ambient.
DG411FDY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for DG411FDY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG411FDY+ 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+ reliable?
The price and inventory of DG411FDY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG411FDY+ is usually 5 days.
3.What payment methods are accepted for DG411FDY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG411FDY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG411FDY+?
DG411FDY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG411FDY+ 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+?
For technical support, including DG411FDY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG411FDY+ requirements.
6.How does Aetrix verify that DG411FDY+ is sourced from the original manufacturer or authorized distributors?
All DG411FDY+ 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+ meets industry standards.
7.What is the process for return or replacement of DG411FDY+?
All DG411FDY+ units undergo pre-shipment inspection (PSI). If there is an issue with DG411FDY+, 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+ part is unused and in its original packaging.
Return procedure for DG411FDY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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