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Analog Devices Inc./Maxim Integrated DG412FDY+T
- Part No.:
- DG412FDY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG412FDY+T.pdf
- Description:
- IC SWITCH SPST-NOX4 35OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,928
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Product details
Overview
DG412FDY+T 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 applied. 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 transients must be blocked without latch-up or damage.
For engineers reviewing the DG412FDY+T datasheet, DG412FDY+T pinout, DG412FDY+T application, or DG412FDY+T equivalent, this page delivers verified specifications, package mapping, fault-protection behavior, switching dynamics, and real-world design context for high-reliability analog signal path selection.
Technical Context
The DG412FDY+T implements dual-FET (N+P channel) parallel switch architecture per channel, enabling low RON and true bidirectional rail-to-rail conduction. Its internal fault-detection comparators monitor COM_, NO_, and NC_ terminals continuously against V+ and V−, forcing high-impedance isolation within 20ns when voltage exceeds ±36V (power on) or ±40V (power off).
All four switches are normally open and independently controlled by TTL/CMOS-compatible digital inputs (VIH = +2.4V, VIL = +0.8V). The device requires no power-supply sequencing and remains fully off when V+ is unpowered-even if V− is active-ensuring fail-safe operation in redundant systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally open (NO); each channel electrically isolated and independently controllable |
| On-Resistance (RON) | 35 Ω max at +25°C, ±15V supplies - ensures minimal signal attenuation and thermal drift in precision DC/low-frequency paths |
| RON Matching | 1.5 Ω max between channels - critical for matched gain/attenuation in multi-channel instrumentation front-ends |
| Fault Protection | ±36V with power applied, ±40V with power off - protects downstream circuitry from transient overvoltages without external clamps |
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports legacy ±15V industrial rails and modern high-voltage single-rail systems |
| Logic Compatibility | TTL/CMOS inputs at ±15V or +12V supply - eliminates level-shifting in mixed-signal control interfaces |
| Turn-On/Off Time | 70–175 ns / 55–145 ns (±15V, CL = 35pF) - enables fast multiplexing in data acquisition and test equipment scan cycles |
Pinout & Package
Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, JEDEC MS-012AC outline, 1.27 mm pitch, body size 10.3 × 7.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | IN1–IN4 | Digital control inputs; active-high logic turns respective NO switch ON; CMOS/TTL compatible thresholds |
| 2, 7, 10, 15 | COM1–COM4 | Analog common terminals; connected to load or measurement point; fault-protected up to ±40V |
| 3, 6, 11, 14 | NO1–NO4 | Normally open analog outputs; only conduct to COM when corresponding IN is high; fault-protected |
| 4 | V− | Negative supply rail; connect to GND for single-supply operation; bypass with 0.1 µF capacitor |
| 5 | GND | Digital ground reference; separates logic domain from analog signal paths; no galvanic connection to COM/NO |
| 12 | N.C. | No internal connection; must remain unconnected on PCB; no routing or stitching required |
| 13 | V+ | Positive supply rail; sets logic thresholds and powers internal translators; bypass with 0.1 µF capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Signals from V− to V+ pass unattenuated in either direction - eliminates clipping in ±10V sensor or DAC output paths |
| 20 ns fault response time | Isolates overvoltage faults before destructive current flows - prevents latch-up and preserves system uptime in avionics monitoring |
| All switches off with V+ unpowered | Guaranteed high-impedance state even if V− remains active - essential for safe hot-swap and backup-system handover |
| Pin-compatible with DG412 | Direct drop-in replacement for legacy non-fault-protected DG412 - no PCB redesign needed for field upgrades |
| ±4.5V to ±20V dual supply range | Supports asymmetric rails (e.g., +12V/−5V) while maintaining full fault coverage - simplifies mixed-voltage system integration |
Applications
| Industrial Signal Routing | Avionics Sensor Multiplexing |
|---|---|
|
Use Scenario: Routing multiple ±10V thermocouple or strain-gauge signals into a shared ADC channel under EMI-prone factory conditions. IC Role / Device Role / Timing Role: Fault-protected analog switch providing channel selection and transient blocking before signal conditioning. Use Value: Prevents damage from 36V surges induced by motor drives or relay coils, eliminating need for external TVS diodes per channel. |
Use Scenario: Selecting between primary and backup air-data sensors (pitot/static) in flight control computers. IC Role / Device Role / Timing Role: Redundant-path analog switch with fail-safe OFF state during power interruption or fault events. Use Value: Ensures automatic isolation of faulty sensor lines without software intervention, meeting DO-160 Section 22 lightning surge requirements. |
| Automated Test Equipment (ATE) | Process Control I/O Modules |
|
Use Scenario: Switching calibration reference voltages (±5V, +10V) into DUT input pins during self-test sequences. IC Role / Device Role / Timing Role: Precision SPST switch enabling fast, repeatable reference injection with sub-100 ns timing control. Use Value: 1.5Ω RON matching ensures consistent gain error across all 4 channels, reducing calibration overhead. |
Use Scenario: Isolating 4–20 mA loop outputs from PLC backplane during maintenance or fault detection. IC Role / Device Role / Timing Role: High-voltage-tolerant analog switch acting as programmable loop disconnect and diagnostic node. Use Value: ±40V fault protection with power off allows safe hot-plug removal while field wiring remains energized. |
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, but rated only to ±20V fault protection; lower RON (20Ω typ) and faster tON (30ns typ) at ±15V | Better suited for high-speed, lower-voltage data acquisition where ±36V fault margin is unnecessary | Select MAX4712ESE+ when speed and RON dominate over extreme fault robustness |
| ADG1412BRUZ | Quad NO switch with ±40V fault protection (power off), but higher RON (40Ω max), no rail-to-rail operation below ±5V, and different pinout | Requires layout change; preferred in systems already using ADI's fault-protected portfolio and needing SPI control | Choose ADG1412BRUZ only if migrating to SPI-configurable switches and accepting higher RON penalty |
Compared with MAX4712ESE+, DG412FDY+T trades speed and typical RON for broader fault coverage and direct DG412 pin compatibility; versus ADG1412BRUZ, it offers superior rail-to-rail conduction and drop-in replacement capability without footprint modification.
Availability
DG412FDY+T is available at Aetrix Electronics and suitable for industrial signal routing, avionics sensor multiplexing, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed fault-protection performance.
Supply support for DG412FDY+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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The DG412FDY+T belongs to the DG41xF fault-protected analog switch family, engineered specifically for high-reliability signal path control in environments exposed to frequent overvoltage transients and power interruptions.
FAQ
What is the maximum fault voltage the DG412FDY+T can withstand with power applied?
The DG412FDY+T withstands up to ±36V on any COM_, NO_, or NC_ terminal when power is applied (V+ and V− active), as specified in the Absolute Maximum Ratings table. This applies regardless of switch state or load condition, and is validated across the full −40°C to +85°C operating temperature range. Exceeding ±36V may cause permanent damage.
Does the DG412FDY+T require power-supply sequencing during startup?
No, the DG412FDY+T does not require power-supply sequencing. It operates safely whether V+ or V− is powered first, and all switches remain OFF until valid logic levels are applied to IN1–IN4. This eliminates risk of unintended conduction during power ramp-up, a key advantage in systems with independent supply domains.
Can the DG412FDY+T operate from a single +12V supply?
Yes, the DG412FDY+T supports single-supply operation from +9V to +36V. For +12V use, connect V− to GND (pin 4), tie GND to pin 5, and apply +12V to V+ (pin 13). Logic inputs remain TTL/CMOS-compatible, and fault protection extends to ±40V with power off - making it ideal for portable and battery-backed instrumentation.
How does the DG412FDY+T behave when V+ is disconnected but V− remains powered?
When V+ is disconnected (0V), the DG412FDY+T forces all four switches into a guaranteed OFF state - regardless of V− voltage or IN1–IN4 logic levels. This fail-safe behavior prevents unintended signal coupling and is explicitly designed for redundant systems where V− may remain active during V+ fault or maintenance.
Is the DG412FDY+T pin-compatible with the legacy DG412?
Yes, the DG412FDY+T has identical pinout and footprint to the non-fault-protected DG412. All IN_, COM_, NO_, V+, V−, GND, and N.C. assignments match exactly. This enables direct replacement on existing PCBs without layout changes, delivering enhanced fault resilience while preserving legacy system functionality and qualification data.
DG412FDY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for DG412FDY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DG412FDY+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 DG412FDY+T reliable?
The price and inventory of DG412FDY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG412FDY+T is usually 5 days.
3.What payment methods are accepted for DG412FDY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG412FDY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG412FDY+T?
DG412FDY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG412FDY+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 DG412FDY+T?
For technical support, including DG412FDY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG412FDY+T requirements.
6.How does Aetrix verify that DG412FDY+T is sourced from the original manufacturer or authorized distributors?
All DG412FDY+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 DG412FDY+T meets industry standards.
7.What is the process for return or replacement of DG412FDY+T?
All DG412FDY+T units undergo pre-shipment inspection (PSI). If there is an issue with DG412FDY+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 DG412FDY+T part is unused and in its original packaging.
Return procedure for DG412FDY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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