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Analog Devices Inc./Maxim Integrated DG418LEUA+T
- Part No.:
- DG418LEUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DG418LEUA+T.pdf
- Description:
- IC SWITCH SPST-NOX1 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,099
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Product details
Overview
DG418LEUA+T from Maxim Integrated is a precision CMOS single-pole/single-throw (SPST), normally open analog switch optimized for low-distortion signal routing in ±15V or +12V systems. It delivers 35Ω max on-resistance, 3Ω max RON matching, <5nA off-leakage at +85°C, and rail-to-rail analog signal handling - enabling high-fidelity audio switching and sample-and-hold circuits in test equipment and battery-operated systems.
For engineers reviewing the DG418LEUA+T datasheet, DG418LEUA+T pinout, DG418LEUA+T application, or DG418LEUA+T equivalent, key selection criteria include guaranteed RON flatness (4Ω max), +3V logic compatibility (VIL = 0.8V, VIH = 2.0V), sub-185ns tOFF, and µMAX-8 package suitability for space-constrained industrial and communications designs.
Technical Context
The DG418LEUA+T implements a fully differential CMOS switch architecture with matched P- and N-channel transistor pairs, enabling symmetrical conduction in both directions and minimizing charge injection (≤15pC). Its logic interface operates independently of supply sequencing - eliminating the need for controlled VL ramping required by legacy DG418 variants.
It supports dual-supply operation from ±4.5V to ±20V and single-supply operation from +9V to +36V, with guaranteed performance across –40°C to +85°C. Analog signal range extends from V– to V+, and internal ESD protection enables robust operation in guidance systems and PBX infrastructure without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω max at ±15V supplies - ensures minimal signal attenuation and gain error in precision instrumentation paths. |
| RON Matching | 3Ω max between channels - critical for matched gain/phase in differential or multiplexed sensor interfaces. |
| Off-Leakage Current | <5nA at +85°C - preserves accuracy in high-impedance sample-and-hold and battery-monitoring circuits. |
| Turn-Off Time (tOFF) | 185ns max at ±15V - enables fast channel switching in automated test equipment with ≤200ns settling. |
| Logic Thresholds | VIL = 0.8V, VIH = 2.0V - guarantees reliable interfacing with +3V TTL and CMOS controllers without level shifters. |
| Analog Signal Range | Rail-to-rail (V– to V+) - supports full dynamic range utilization in audio routing and industrial voltage monitoring. |
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - simplifies power architecture in mixed-signal systems with legacy ±15V rails or modern +12V/24V supplies. |
Pinout & Package
The DG418LEUA+T is housed in an 8-pin µMAX package (3.0mm × 3.0mm, 0.8mm height), specified for surface-mount assembly with exposed pad thermal enhancement. Pin 1 is COM (common terminal); pins 2 and 5 are no-connect (N.C.); pin 3 is GND; pin 4 is V+; pin 6 is IN (logic control input); pin 7 is V–; and pin 8 is NO (normally open switch terminal).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - COM | Analog common node | Signal path junction shared between input and output; must be routed with controlled impedance in RF/audio applications. |
| 2, 5 - N.C. | No internal connection | Unused pins; may be left floating or tied to GND for mechanical stability - no electrical function. |
| 3 - GND | Digital logic reference | Reference for logic inputs only; separate from analog ground but must be low-impedance to minimize noise coupling. |
| 4 - V+ | Positive analog supply | Bias source for P-channel devices; sets upper analog signal limit and affects RON and leakage performance. |
| 6 - IN | Logic control input | +3V-compatible digital enable; active-high for DG418L (NO closes when IN = high). |
| 7 - V– | Negative analog supply | Bias source for N-channel devices; defines lower analog signal limit and impacts charge injection and THD. |
| 8 - NO | Normally open switch terminal | Open-circuit when IN = low; connects to COM when IN = high - used for interruptible signal paths in modems and fax machines. |
Key Features
| Feature | Design Value |
|---|---|
| +3V logic compatibility | VIH = 2.0V / VIL = 0.8V thresholds eliminate level-shifter ICs when interfacing with microcontrollers and FPGAs. |
| Power-supply sequencing-free operation | No VL pin or startup sequence dependency - prevents latch-up during uncontrolled power-up in military radios and embedded control units. |
| Rail-to-rail analog signal handling | Full V– to V+ conduction enables use in ±12V op-amp signal chains and +24V industrial I/O modules without clipping. |
| Guaranteed RON flatness | 4Ω max variation over signal range - maintains consistent gain and linearity in audio signal routing and precision data acquisition. |
| Low charge injection | 15pC max - minimizes voltage glitch on sampled capacitors in hold circuits, reducing droop and calibration drift. |
Applications
| Audio Signal Routing | Test Equipment |
|---|---|
Use Scenario: Switching between multiple microphone preamplifier outputs to a single ADC input in professional audio mixers. IC Role / Device Role / Timing Role: SPST analog switch providing low-noise, low-THD (<0.002%) signal path selection with sub-200ns switching. Use Value: Preserves wideband fidelity (20Hz–20kHz) and avoids audible clicks due to low charge injection (≤15pC) and matched RON. |
Use Scenario: Multiplexing DUT signals into a shared oscilloscope or spectrum analyzer front-end in automated test systems. IC Role / Device Role / Timing Role: Precision SPST switch enabling fast, repeatable channel selection with guaranteed RON matching (≤3Ω) for calibrated measurements. Use Value: Eliminates measurement offset drift across channels and supports >1MHz bandwidth with –90dB off-isolation. |
| Sample-and-Hold Circuits | Battery-Operated Systems |
Use Scenario: Capturing analog sensor outputs (e.g., thermocouple, strain gauge) in portable data loggers with microsecond-level sampling windows. IC Role / Device Role / Timing Role: Low-leakage (≤5nA @ +85°C), low-RON (35Ω) switch isolating hold capacitor during acquisition phase. Use Value: Reduces hold-time droop and extends battery life via ultra-low quiescent current (≤10µA per supply rail). |
Use Scenario: Enabling/disabling power to peripheral sensors and transceivers in handheld medical devices and IoT edge nodes. IC Role / Device Role / Timing Role: Normally open load switch controlled by +3V MCU GPIO, supporting single-supply +12V operation without external regulators. Use Value: Simplifies BOM by replacing discrete MOSFET + driver combos while maintaining rail-to-rail signal integrity and low standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX318ESA+ | Same pinout, identical µMAX-8 package, but higher RON (45Ω max) and wider leakage (10nA @ +85°C). | Suitable for less demanding industrial controls where cost sensitivity outweighs precision requirements. | Select MAX318ESA+ only if system tolerates higher on-resistance and leakage; not recommended for audio or high-resolution data acquisition. |
| ADG1419BRMZ | Different pinout (10-lead MSOP), higher supply voltage (±22V), lower RON (2.6Ω), but requires +5V logic interface. | Better suited for high-speed, low-distortion applications like automated test equipment requiring faster switching (tON = 100ns). | Choose ADG1419BRMZ when upgrading performance is prioritized over drop-in replacement; PCB redesign required due to pin count and layout mismatch. |
Compared with DG418LEUA+T, MAX318ESA+ offers cost savings at the expense of precision and leakage control, while ADG1419BRMZ delivers superior RON and speed but mandates logic-level and footprint changes - making DG418LEUA+T optimal for legacy +3V logic systems needing proven reliability in extended temperature environments.
Availability
DG418LEUA+T is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and battery-operated system power management requiring stable component supply across industrial, defense, and medical design cycles.
Supply support for DG418LEUA+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The DG418LEUA+T belongs to Maxim's precision analog switch product line, engineered for applications demanding low distortion, tight parameter matching, and robust operation in harsh thermal and electrical environments.
FAQ
What is the maximum supply voltage rating for DG418LEUA+T?
The DG418LEUA+T supports dual-supply operation up to ±20V and single-supply operation up to +36V. Absolute maximum ratings specify V+ to V– ≤ 44V and V+ to GND ≤ 25V. Exceeding these limits risks permanent damage. For reliable long-term operation, stay within the recommended ranges: ±4.5V to ±20V (dual) or +9V to +36V (single). The DG418LEUA+T datasheet confirms these values under Absolute Maximum Ratings on page 2.
Does DG418LEUA+T require power-supply sequencing during startup?
No, DG418LEUA+T does not require controlled power-supply sequencing. Unlike legacy DG418 variants, it eliminates the VL pin and supports arbitrary power-up order of V+, V–, and GND. This feature prevents latch-up in systems with independent rail regulators - a key advantage confirmed in the Applications Information section (page 9) of the DG418LEUA+T datasheet.
What is the typical charge injection value for DG418LEUA+T, and why does it matter?
The DG418LEUA+T specifies a maximum charge injection of 15pC under standard test conditions (VGEN = 0, CL = 1nF). This low value minimizes voltage glitches on hold capacitors in sample-and-hold circuits, directly improving acquisition accuracy and reducing calibration drift. The DG418LEUA+T datasheet reports this in the Dynamic Characteristics table (page 3) and illustrates its impact in Figure 4.
Can DG418LEUA+T operate from a single +12V supply?
Yes, DG418LEUA+T is fully specified for single-supply operation from +9V to +36V. At +12V, it delivers RON ≤ 125Ω (max), tON ≤ 300ns, and off-leakage <5nA at +85°C. These parameters are validated in the "Electrical Characteristics-Single +12V Supply" tables (pages 4–5) of the DG418LEUA+T datasheet, confirming suitability for battery-powered instrumentation and industrial controls.
Is DG418LEUA+T pin-compatible with the original DG418?
No, DG418LEUA+T is not pin-compatible with the legacy DG418. While both are SPST NO switches in 8-pin packages, the DG418LEUA+T omits the VL pin (replacing it with N.C.) and reassigns pin 8 to NO (vs. NC on DG418). This structural change enables sequencing-free operation but requires PCB layout revision. The DG418LEUA+T datasheet explicitly notes this difference in the Pin Description table (page 8) and Ordering Information (page 10).
DG418LEUA+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:
- 1
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 175ns, 185ns
- -3db Bandwidth:
- -
- Charge Injection:
- 15pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DG418LEUA+T FAQ
1.How can I place an order for DG418LEUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418LEUA+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 DG418LEUA+T reliable?
The price and inventory of DG418LEUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418LEUA+T is usually 5 days.
3.What payment methods are accepted for DG418LEUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418LEUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418LEUA+T?
DG418LEUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418LEUA+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 DG418LEUA+T?
For technical support, including DG418LEUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418LEUA+T requirements.
6.How does Aetrix verify that DG418LEUA+T is sourced from the original manufacturer or authorized distributors?
All DG418LEUA+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 DG418LEUA+T meets industry standards.
7.What is the process for return or replacement of DG418LEUA+T?
All DG418LEUA+T units undergo pre-shipment inspection (PSI). If there is an issue with DG418LEUA+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 DG418LEUA+T part is unused and in its original packaging.
Return procedure for DG418LEUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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