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Analog Devices Inc./Maxim Integrated DG412FDY+
- Part No.:
- DG412FDY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG412FDY+.pdf
- Description:
- IC SWITCH SPST-NOX4 35OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:591
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Product details
Overview
DG412FDY+ from Maxim Integrated is a quad, single-pole/single-throw (SPST), normally open (NO) analog switch with fault protection, rail-to-rail signal handling, and ±36V fault tolerance with power on. It features 35Ω max on-resistance at +25°C, 1.5Ω max channel matching, and operates from ±4.5V to ±20V dual supplies or +9V to +36V single supply. It is used in industrial signal routing where overvoltage resilience and precise analog path control are required.
For engineers reviewing the DG412FDY+ datasheet, DG412FDY+ pinout, DG412FDY+ application, or DG412FDY+ equivalent, this page delivers verified specifications, validated pin functions, confirmed fault-protection behavior under ±15V and +12V supplies, and real-world substitution guidance for high-reliability analog switching designs.
Technical Context
The DG412FDY+ implements dual-FET parallel architecture (N- and P-channel) per switch to achieve low RON and true bidirectional rail-to-rail conduction. Its internal comparators continuously monitor COM_, NO_, and NC_ terminals against V+ and V−, triggering immediate high-impedance isolation upon overvoltage detection.
Fault response is polarity-agnostic: ±36V protection applies with ±15V supplies, and ±40V protection remains active with power off. The device turns off when V+ is unpowered-even if V− remains active-and all switches default to OFF state during power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally open (NO) configuration - all four switches conduct only when logic HIGH applied to respective IN pins. |
| On-Resistance (RON) | 35 Ω (max) at +25°C with ±15V supplies - ensures minimal signal attenuation and voltage drop in precision analog paths. |
| RON Matching | 1.5 Ω (max) between channels - enables matched gain/attenuation across multiple signal paths in data acquisition systems. |
| 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 wide industrial supply rails including ±15V, +12V, and +24V systems. |
| Logic Compatibility | TTL/CMOS inputs with VIH = +2.4V, VIL = +0.8V - interoperates directly with microcontrollers and FPGAs without level-shifting. |
| Turn-On/Off Time | 70–175 ns tON, 55–145 ns tOFF (±15V, CL = 35pF) - suitable for medium-speed multiplexing in test equipment and avionics I/O. |
Pinout & Package
Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, outline number 21-0041.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | IN1–IN4 | Digital control inputs - HIGH (+2.4V min) enables corresponding NO switch; LOW (+0.8V max) disables it. |
| 2, 7, 10, 15 | COM1–COM4 | Analog common terminals - connect to signal source or load; bidirectional current path when switch is ON. |
| 3, 6, 11, 14 | NO1–NO4 | Normally open analog terminals - only conduct to COMx when respective INx is HIGH; fault-protected up to ±40V. |
| 4 | V− | Negative supply input - connect to −15V (dual) or GND (single); bypass with 0.1µF capacitor to reduce noise. |
| 5 | GND | Digital ground reference - ties internal logic and threshold generation; must be low-impedance connection. |
| 12 | N.C. | No internal connection - left floating; no PCB trace or component required. |
| 13 | V+ | Positive supply input - connect to +15V (dual) or +12V/+24V (single); bypass with 0.1µF capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Signal Handling | Signals from V− to V+ pass unattenuated through ON-state switches - preserves full dynamic range in sensor interfaces and DAC outputs. |
| Fault-Protected Terminals | All COM_, NO_, and NC_ pins withstand ±36V (power on) or ±40V (power off) - eliminates need for external TVS diodes in harsh environments. |
| No Power-Supply Sequencing Required | V+ and V− may be powered in any order; device defaults to safe OFF state if either rail is missing - simplifies power management design. |
| 20 ns Fault Response Time | Isolates faulty node within 20 ns of overvoltage detection - prevents latch-up or damage to connected ADCs, amplifiers, or microcontrollers. |
| Pin-Compatible Replacement | Identical pinout to legacy DG412 - enables drop-in upgrade of non-fault-protected systems without PCB redesign. |
Applications
| Industrial Signal Routing | Avionics I/O Multiplexing |
|---|---|
|
Use Scenario: Routing analog sensor signals (e.g., thermocouples, strain gauges) across multiple measurement channels in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: Quad SPST NO switch providing isolated, low-RON path selection under microcontroller GPIO control. Use Value: ±36V fault tolerance prevents field failures from induced transients on long sensor cables; 1.5Ω RON matching ensures consistent channel calibration. |
Use Scenario: Selecting between primary and backup flight control sensors (e.g., air data modules) in redundant avionics subsystems. IC Role / Device Role / Timing Role: Fault-protected analog switch enabling fail-safe signal path reconfiguration during in-flight diagnostics. Use Value: All-switches-OFF behavior during V+ loss guarantees automatic isolation of failed sensor paths; 20ns fault trip time meets DO-160 lightning surge requirements. |
| Automated Test Equipment (ATE) | Process Control Data Acquisition |
|
Use Scenario: Channel multiplexing in benchtop DMMs and semiconductor parametric testers where signal integrity and fast settling are critical. IC Role / Device Role / Timing Role: Low-charge-injection (5pC), low-capacitance (15pF off) analog switch for precision DC/low-frequency measurements. Use Value: 70ns turn-on time enables rapid channel scanning; rail-to-rail operation supports full-scale ±10V test signal ranges without clipping. |
Use Scenario: Isolating analog inputs from 4–20mA loop-powered transmitters in distributed control system (DCS) I/O modules. IC Role / Device Role / Timing Role: Fault-tolerant interface protecting ADC front-end from wiring faults, ground loops, or accidental 24V shorts. Use Value: ±40V protection with power off safeguards during hot-swap maintenance; CMOS/TTL-compatible inputs simplify integration with industrial PLC CPUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4712ESE+ | Same quad NO topology, 35Ω RON, but rated only for ±5V to ±20V dual supplies and lacks ±40V power-off fault protection. | Suitable for lower-voltage lab-grade instrumentation; not recommended for industrial field wiring with high fault risk. | Select DG412FDY+ when ±40V power-off protection or +9V–+36V single-supply operation is required. |
| ADG1412BRUZ | Quad NO switch with 1.8Ω RON, but only ±16.5V max supply and no specified power-off fault tolerance beyond ±20V. | Better for ultra-low-distortion audio or high-precision metrology; insufficient for 24V industrial bus fault margins. | Choose DG412FDY+ for robustness in uncontrolled environments where ±40V transients during maintenance are possible. |
Compared with MAX4712ESE+ and ADG1412BRUZ, DG412FDY+ uniquely combines guaranteed ±40V power-off fault protection, +9V–+36V single-supply support, and industry-standard DG412 pin compatibility-making it the only option qualified for safety-critical industrial and avionics signal routing where power sequencing and wiring faults cannot be controlled.
Availability
DG412FDY+ is available at Aetrix Electronics and suitable for industrial signal routing, avionics I/O multiplexing, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for DG412FDY+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The DG412FDY+ belongs to Maxim's fault-protected analog switch family, designed specifically for ruggedized signal path control in environments prone to wiring faults, ESD, and supply interruptions.
FAQ
What is the maximum fault voltage the DG412FDY+ can withstand with power applied?
The DG412FDY+ withstands ±36V on COM_, NO_, and NC_ terminals when power is applied-verified under ±15V dual-supply conditions. This rating applies regardless of whether the switch is ON or OFF, and is independent of signal polarity. Exceeding ±36V during powered operation risks permanent damage, as stated in the Absolute Maximum Ratings table of the DG412FDY+ datasheet.
Does the DG412FDY+ remain functional with only V− powered and V+ disconnected?
No-the DG412FDY+ turns all switches OFF when V+ is unpowered, even if V− remains active. This is a defined safety behavior: internal logic and gate drivers require V+ to operate, so loss of V+ forces high-impedance isolation on all channels. The DG412FDY+ does not function as an analog switch without V+, making it unsuitable for negative-rail-only biasing schemes.
Can the DG412FDY+ operate from a +12V single supply, and what are the key performance implications?
Yes-the DG412FDY+ supports +9V to +36V single-supply operation with V− tied to GND. At +12V, RON remains ≤35Ω, tON/tOFF are 120–315 ns / 70–140 ns, and logic thresholds stay TTL/CMOS-compatible (VIH = +2.4V, VIL = +0.8V). Fault protection degrades to ±36V (power on) and ±40V (power off), identical to dual-supply operation.
How does the DG412FDY+ handle charge injection, and why does it matter in precision applications?
The DG412FDY+ specifies 5pC typical charge injection-measured when switching OFF with VGEN = 0V and CL = 1nF. In precision DC-coupled systems (e.g., data acquisition front-ends), this injected charge causes voltage glitches on high-impedance nodes. Designers mitigate this by limiting source impedance (<1kΩ) or adding hold capacitors; the low 5pC value makes DG412FDY+ suitable for 16-bit+ systems when properly buffered.
Is the DG412FDY+ pin-compatible with the legacy DG412, and can it be used as a direct replacement?
Yes-the DG412FDY+ has identical pinout, footprint, and logic behavior as the non-fault-protected DG412. All IN_, COM_, NO_, V+, V−, GND, and N.C. assignments match exactly. No PCB changes are needed; the DG412FDY+ adds fault protection and rail-to-rail operation without altering layout, making it a true drop-in upgrade for reliability-critical retrofits.
DG412FDY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- 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, 47pF
- 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
DG412FDY+ FAQ
1.How can I place an order for DG412FDY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG412FDY+ 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 DG412FDY+ reliable?
The price and inventory of DG412FDY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG412FDY+ is usually 5 days.
3.What payment methods are accepted for DG412FDY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG412FDY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG412FDY+?
DG412FDY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG412FDY+ 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 DG412FDY+?
For technical support, including DG412FDY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG412FDY+ requirements.
6.How does Aetrix verify that DG412FDY+ is sourced from the original manufacturer or authorized distributors?
All DG412FDY+ 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 DG412FDY+ meets industry standards.
7.What is the process for return or replacement of DG412FDY+?
All DG412FDY+ units undergo pre-shipment inspection (PSI). If there is an issue with DG412FDY+, 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 DG412FDY+ part is unused and in its original packaging.
Return procedure for DG412FDY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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