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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:1,930
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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 ±15V or +12V systems. It delivers 35Ω max on-resistance, <5nA off-leakage at +85°C, and 175ns max turn-on time, enabling high-fidelity audio and data acquisition paths in battery-powered test equipment and communications hardware.
For engineers reviewing the DG418LDJ datasheet, DG418LDJ pinout, DG418LDJ application, or DG418LDJ equivalent, key selection criteria include guaranteed RON matching (≤3Ω), rail-to-rail analog signal handling, +3V logic compatibility with 0.8V/2.0V thresholds, and extended temperature operation from –40°C to +85°C in an 8-pin plastic DIP package.
Technical Context
The DG418LDJ implements a fully differential CMOS transmission gate architecture with matched P- and N-channel devices, enabling bidirectional conduction and low charge injection (15pC typical). Its digital input stage features TTL/CMOS-compatible thresholds independent of supply voltage, allowing direct interface with +3V microcontrollers without level shifting.
It operates across dual supplies (±4.5V to ±20V) or single supplies (+9V to +36V), with power-supply sequencing-free startup-eliminating latch-up risk during V+, V–, or GND ramp sequences. Off-isolation exceeds –90dB at 1MHz, and THD remains below 0.002% over 20Hz–20kHz with 600Ω load.
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 differential signal integrity and balanced switching applications |
| Off-Leakage Current | <5nA at +85°C - preserves accuracy in high-impedance sample-and-hold and sensor front-ends |
| Turn-On/Off Time | 175ns / 185ns max - supports multiplexing rates up to ~5MHz in automated test equipment |
| Analog Signal Range | Rail-to-rail: (V– – 0.3V) to (V+ + 0.3V) - enables full utilization of supply headroom in ±15V op-amp circuits |
| Logic Compatibility | VIL = 0.8V, VIH = 2.0V - interoperable with +3V FPGA I/O, ARM GPIO, and low-voltage microcontrollers |
| Supply Range | Single: +9V to +36V; Dual: ±4.5V to ±20V - supports industrial PLCs, military radios, and portable medical devices |
Pinout & Package
Package: 8-pin plastic DIP (0.3-inch width), through-hole mount, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COM | Analog Switch Common Terminal | Signal path hub - connects to source or load; bidirectional current flow supported |
| 2 N.C. | No Connection | Internally unconnected - must remain floating; no external tie required |
| 3 GND | Logic Ground Reference | Reference for digital control inputs only - separate from analog ground unless system design mandates common reference |
| 4 V+ | Analog Positive Supply Input | Bias for P-channel device; sets upper analog signal limit and powers internal logic |
| 6 IN | Logic-Level Control Input | Active-high enable: logic high closes switch (NO → COM); logic low opens (high-impedance state) |
| 7 V– | Analog Negative Supply Input | Bias for N-channel device; sets lower analog signal limit and completes analog bias network |
| 8 NC | Analog Normally Closed Terminal | Not used in DG418L configuration - left unconnected; distinct from DG417L's NC function |
Key Features
| Feature | Design Value |
|---|---|
| +3V Logic-Compatible Inputs | VIH = 2.0V / VIL = 0.8V thresholds eliminate need for level shifters when interfacing with modern low-voltage controllers |
| Guaranteed RON Flatness | 4Ω max variation across full analog range - maintains consistent gain and linearity in precision gain-switching networks |
| Power-Supply Sequencing-Free Operation | No required power-up order for V+, V–, or GND - removes risk of latch-up and simplifies power management in multi-rail systems |
| Rail-to-Rail Analog Handling | Supports signals from (V– – 0.3V) to (V+ + 0.3V) - maximizes dynamic range in ±15V op-amp stages and data converter interfaces |
| Low Charge Injection | 15pC typical - minimizes voltage glitch on sampled nodes in S/H circuits and ADC front-ends |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Selecting between multiple microphone preamp outputs before ADC sampling in a portable field recorder. IC Role / Device Role / Timing Role: SPST NO switch isolating unused analog paths to prevent crosstalk and loading during active channel selection. Use Value: 35Ω RON and <0.002% THD preserve wideband audio fidelity; +3V logic compatibility allows direct FPGA control without level translation. |
Use Scenario: Scanning 16 thermocouple inputs into a single precision ADC in automated calibration hardware. IC Role / Device Role / Timing Role: High-speed, low-leakage analog switch enabling accurate millivolt-level measurements without offset drift. Use Value: <5nA off-leakage at +85°C prevents measurement error in high-Z sensor paths; 175ns tON supports >5kSPS scanning rates. |
| Battery-Operated Modems | Military Radio Signal Conditioning |
|
Use Scenario: Enabling/disabling filter banks and line drivers in a low-power fax/modem IC during sleep/wake cycles. IC Role / Device Role / Timing Role: Low-quiescent-current analog gate controlling analog signal path power domains. Use Value: 10µA max supply current at +25°C extends battery life; single +12V operation simplifies power architecture. |
Use Scenario: Routing RF IF signals between antenna diversity paths and receiver front-ends in ruggedized HF/VHF transceivers. IC Role / Device Role / Timing Role: High-isolation SPST switch providing >90dB off-isolation to suppress inter-path interference. Use Value: –90dB off-isolation at 1MHz and –86dB crosstalk ensure clean signal separation in dense RF environments. |
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 use; less ideal for ultra-low-distortion audio due to higher RON | Select MAX4618EPA+ if extended temperature rating is mandatory and RON tolerance >45Ω is acceptable. |
| ADG1419BRUZ | Lower RON (3.8Ω typ), SPI-controlled, 16-pin TSSOP - not pin-compatible | Requires digital control logic and PCB redesign; superior for high-channel-count, low-RON systems | Choose ADG1419BRUZ only when upgrading to serial control and accepting layout change for sub-4Ω performance. |
Compared with DG418LDJ, MAX4618EPA+ trades lower distortion and tighter RON matching for extended temperature capability, while ADG1419BRUZ offers dramatically lower resistance but demands full system re-engineering - making DG418LDJ optimal for drop-in replacement in legacy ±15V industrial and test gear.
Availability
DG418LDJ is available at Aetrix Electronics and suitable for test equipment multiplexing, battery-operated modems, and military radio signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
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 DG417L/DG418L/DG419L family was engineered to replace legacy DG417/DG418/DG419 switches with enhanced +3V logic compatibility, sequencing-free operation, and improved leakage and flatness specs for next-generation test and signal routing systems.
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, it covers 0V to +12.3V. This range is enforced by internal clamp diodes and must stay within absolute maximum ratings to avoid damage.
Does DG418LDJ require power-supply sequencing during startup?
No. DG418LDJ features power-supply sequencing-free operation - V+, V–, and GND may power up in any order without risk of latch-up. This eliminates the need for external diodes or sequencing circuitry required by older DG417/DG418 devices, simplifying system power design.
Can DG418LDJ be used with a single +12V supply?
Yes. DG418LDJ operates from a single +9V to +36V supply. When using +12V, V– is connected to ground, V+ to +12V, and the analog signal range becomes 0V to +12.3V. RON increases to 125Ω max under these conditions, as specified in the single-supply electrical characteristics table.
What is the logic polarity of the IN pin on DG418LDJ?
The IN pin on DG418LDJ is active-high: a logic high (≥2.0V) closes the switch (connects NO to COM), and a logic low (≤0.8V) opens it (high-impedance state). This matches standard positive-logic control schemes and requires no inversion in FPGA or microcontroller firmware.
How does DG418LDJ compare to DG417LDJ in pinout and function?
DG418LDJ and DG417LDJ share identical 8-pin DIP pinouts and supply connections, but differ functionally: DG418LDJ is normally open (NO), while DG417LDJ is normally closed (NC). Their truth tables are complementary - both use the same IN pin logic, but assert opposite default states when IN is low.
DG418LDJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- 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:
- -86dB @ 1MHz
- 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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