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Analog Devices Inc./Maxim Integrated DG418LDJ+
- Part No.:
- DG418LDJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DG418LDJ+.pdf
- Description:
- IC SWITCH SPST-NO X 1 35OHM 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,293
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Product details
Overview
DG418LDJ+ from Maxim Integrated is a precision CMOS single-pole/single-throw (SPST), normally open analog switch optimized for signal routing in battery-operated and industrial systems. It features 35Ω maximum on-resistance, ±15V dual-supply or +9V to +36V single-supply operation, guaranteed 3Ω max RON matching, and rail-to-rail analog signal handling from –15V to +15V (dual) or 0V to +12V (single). Its +3V logic-compatible digital input (VIL = 0.8V, VIH = 2.0V) enables direct interface with low-voltage microcontrollers.
For engineers reviewing the DG418LDJ+ datasheet, DG418LDJ+ pinout, DG418LDJ+ application, or DG418LDJ+ equivalent, this page delivers verified electrical parameters, package-specific terminal roles, real-world use cases in audio routing and test equipment, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The DG418LDJ+ implements a fully complementary CMOS transmission gate architecture with matched P- and N-channel devices, enabling bidirectional conduction and low charge injection (≤15pC). Its logic interface operates independently of supply sequencing-no VL pin required-eliminating latch-up risk during power-up under ±4.5V to ±20V or +9V to +36V conditions.
It guarantees monotonic on-resistance flatness (≤4Ω max over signal range) and ultra-low off-leakage (<5nA at +85°C), making it suitable for high-impedance sample-and-hold and precision sensor front-ends where signal integrity and DC accuracy are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω max at ±15V supplies - ensures minimal signal attenuation and voltage drop in precision analog paths |
| RON Matching | 3Ω max between channels - critical for differential signal switching and matched gain stages |
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports wide-range industrial and legacy system integration |
| Logic Thresholds | VIL = 0.8V, VIH = 2.0V - ensures reliable TTL/CMOS compatibility without level-shifting circuitry |
| Off-Leakage Current | <5nA at +85°C - preserves accuracy in high-impedance circuits like integrators and sensor interfaces |
| Switching Time (tON/tOFF) | <175ns / <185ns at ±15V - enables fast multiplexing in data acquisition and communications systems |
| Analog Signal Range | Rail-to-rail: (V– – 0.3V) to (V+ + 0.3V) - supports full dynamic range utilization across supply configurations |
Pinout & Package
DG418LDJ+ is housed in an 8-pin plastic DIP package (0.300" width), RoHS-compliant and rated for –40°C to +85°C operation. Pin spacing is 0.100", compatible with standard through-hole PCB layouts and socket-based prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | COM | Analog common terminal - connects to signal source or load; bidirectional current path |
| 2 | N.C. | No internal connection - must be left unconnected; not electrically tied to any internal node |
| 3 | GND | Digital logic ground reference - separate from analog supply grounds but referenced for input thresholds |
| 4 | V+ | Positive analog supply - sets upper rail for analog signal range and powers internal logic |
| 6 | IN | Active-high logic control input - drives internal transmission gate; accepts +3V logic directly |
| 7 | V– | Negative analog supply - sets lower rail for analog signal range; required for bipolar operation |
| 8 | NO | Normally open analog switch terminal - connects to COM only when IN = high; isolated otherwise |
Key Features
| Feature | Design Value |
|---|---|
| +3V logic-compatible inputs | VIH = 2.0V / VIL = 0.8V thresholds eliminate need for external level shifters with modern MCUs |
| Power-supply sequencing-free operation | No VL pin or strict V+, V–, GND startup order required - reduces system design complexity and BOM count |
| Rail-to-rail analog signal handling | Supports signals from V– – 0.3V to V+ + 0.3V - maximizes usable dynamic range in both single- and dual-supply modes |
| Guaranteed RON flatness (4Ω max) | Minimizes harmonic distortion and gain error across full signal swing - essential for audio and instrumentation |
| Low charge injection (≤15pC) | Reduces voltage glitch on sampled nodes - improves accuracy in S/H circuits and ADC front-ends |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Selecting between multiple microphone or line-level inputs in portable audio mixers and voice recorders. IC Role / Device Role / Timing Role: SPST NO switch isolating unused analog paths while passing active signals with minimal THD (0.002%) and crosstalk (–86dB). Use Value: Enables clean, low-noise channel selection without audible artifacts or inter-channel bleed, even at battery voltages down to +9V. |
Use Scenario: Routing calibration signals and DUT outputs in automated test equipment (ATE) with multi-channel DMMs. IC Role / Device Role / Timing Role: Precision analog switch providing <5nA off-leakage and 35Ω RON to maintain measurement integrity across temperature. Use Value: Ensures traceable, repeatable measurements by eliminating leakage-induced offset errors in high-Z sensing paths. |
| Battery-Operated Systems | Communications Systems |
|
Use Scenario: Managing power and signal paths in handheld medical monitors and portable data loggers. IC Role / Device Role / Timing Role: Low-quiescent-current (≤10µA) analog switch enabling long battery life while supporting rail-to-rail signal swing. Use Value: Extends operational runtime without sacrificing analog fidelity - critical for field-deployed diagnostic tools. |
Use Scenario: Switching between transmit/receive paths and filter banks in modem and fax machine signal chains. IC Role / Device Role / Timing Role: Fast-switching (tON < 175ns), low-distortion analog switch handling baseband audio and FSK tones. Use Value: Maintains signal integrity across PSTN line interfaces with minimal group delay variation and THD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618EPA+ | Higher RON (45Ω typ), wider temp range (–40°C to +125°C), same 8-pin PDIP package | Better suited for automotive under-hood environments requiring extended temperature rating | Select MAX4618EPA+ if operating above +85°C or needing higher ESD tolerance (±4kV HBM) |
| ADG1419BRZ | Lower RON (2.6Ω typ), SPI-controlled, SOIC-16 package, requires external logic interface | Designed for digitally controlled, multi-channel matrix switching rather than simple SPST logic control | Choose ADG1419BRZ only when programmable channel mapping and sub-3Ω RON outweigh need for direct +3V logic drive |
Compared with DG418LDJ+, MAX4618EPA+ trades lower leakage and tighter RON matching for higher on-resistance and no guaranteed flatness spec, while ADG1419BRZ replaces simplicity with digital configurability at the cost of added firmware overhead and larger footprint.
Availability
DG418LDJ+ is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and battery-operated systems requiring stable component supply, long-term lifecycle support, and extended temperature performance.
Supply support for DG418LDJ+ 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 industrial, medical, and communications applications.
The DG418LDJ+ belongs to Maxim's legacy DG4xxL series of logic-compatible analog switches, engineered specifically for robust, low-distortion signal routing in systems constrained by supply voltage, power, and board space.
FAQ
What is the maximum analog signal voltage range supported by DG418LDJ+?
DG418LDJ+ supports rail-to-rail analog signals from (V– – 0.3V) to (V+ + 0.3V). With ±15V supplies, this yields –15.3V to +15.3V; with +12V single supply (V– = 0V), it supports 0V to +12.3V. Exceeding these limits risks clamping or damage due to internal diode conduction.
Can DG418LDJ+ operate from a single +12V supply?
Yes, DG418LDJ+ is fully specified for single-supply operation from +9V to +36V. At +12V, its on-resistance is ≤125Ω (max), tON/tOFF remain under 400ns, and logic thresholds stay valid. GND serves as the reference for both digital input and analog return path.
Is DG418LDJ+ pin-compatible with the older DG418DJ?
No. DG418LDJ+ uses the same 8-pin DIP footprint as DG418DJ, but pin functions differ: DG418DJ has a VL pin (pin 3) for logic supply, whereas DG418LDJ+ uses pin 3 as GND. Direct replacement requires PCB modification to reroute GND and remove VL connections.
What is the typical charge injection of DG418LDJ+ and why does it matter?
DG418LDJ+ specifies ≤15pC typical charge injection. This parasitic charge transfer occurs during switching and causes voltage glitches on high-impedance nodes (e.g., S/H capacitors). In precision sampling applications, low charge injection minimizes settling error and maintains DC accuracy after switching.
Does DG418LDJ+ require external protection diodes on analog pins?
No. DG418LDJ+ includes internal ESD protection diodes on COM, NO, and NC pins that clamp signals exceeding V+ or V– by ±0.3V. However, forward current must be limited to ≤30mA continuous or ≤100mA pulsed (1ms, 10% duty cycle) to avoid damage - external series resistors may be needed in high-energy transient environments.
DG418LDJ+ 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:
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
DG418LDJ+ FAQ
1.How can I place an order for DG418LDJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418LDJ+ 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 DG418LDJ+ reliable?
The price and inventory of DG418LDJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418LDJ+ is usually 5 days.
3.What payment methods are accepted for DG418LDJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418LDJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418LDJ+?
DG418LDJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418LDJ+ 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 DG418LDJ+?
For technical support, including DG418LDJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418LDJ+ requirements.
6.How does Aetrix verify that DG418LDJ+ is sourced from the original manufacturer or authorized distributors?
All DG418LDJ+ 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 DG418LDJ+ meets industry standards.
7.What is the process for return or replacement of DG418LDJ+?
All DG418LDJ+ units undergo pre-shipment inspection (PSI). If there is an issue with DG418LDJ+, 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 DG418LDJ+ part is unused and in its original packaging.
Return procedure for DG418LDJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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