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Analog Devices Inc./Maxim Integrated DG418LDY+
- Part No.:
- DG418LDY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG418LDY+.pdf
- Description:
- IC SWITCH SPST-NOX1 35OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:106
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Product details
Overview
DG418LDY+ 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, 3Ω max RON matching, <5nA off-leakage at +85°C, and rail-to-rail analog signal handling - enabling high-fidelity audio routing and low-distortion sample-and-hold circuits.
For engineers reviewing the DG418LDY+ datasheet, DG418LDY+ pinout, DG418LDY+ application, or DG418LDY+ equivalent, key selection criteria include guaranteed RON flatness (4Ω max), +3V logic compatibility (VIH = 2.0V, VIL = 0.8V), sub-185ns tOFF, and operation across -40°C to +85°C with ±4.5V to ±20V or +9V to +36V supplies.
Technical Context
The DG418LDY+ implements a fully differential CMOS transmission gate architecture with matched P- and N-channel devices, enabling bidirectional conduction and rail-to-rail analog swing. Its digital control interface features TTL/CMOS-compatible thresholds independent of supply sequencing - eliminating need for VL bias or power-up order constraints.
Designed for bipolar and single-supply operation, it maintains <4Ω RON flatness over full signal range and guarantees <3Ω channel-to-channel RON matching. Charge injection is limited to 15pC (dual supply) or 2.5pC (single +12V), supporting precision sampling without hold capacitor corruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω max at ±15V; 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 signal chains |
| RON Flatness | 4Ω max over signal range; preserves linearity in audio and sensor signal conditioning |
| Off-Leakage Current | <5nA at +85°C; enables stable DC-coupled sample-and-hold hold times >10s with 1µF capacitor |
| Turn-Off Time (tOFF) | <185ns at ±15V; supports >1MHz multiplexing in automated test equipment |
| Logic Compatibility | +3V TTL/CMOS: VIH = 2.0V, VIL = 0.8V; interfaces directly with FPGA I/O and microcontroller GPIO |
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single; supports industrial battery-powered and mains-derived rails |
Pinout & Package
Package: 8-pin SO (Small Outline). RoHS-compliant, surface-mount, 150-mil body width, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COM | Analog common terminal | Signal path hub; connects to load or ADC input; bidirectional conduction path |
| 2 N.C. | No connection | Internally unconnected; must be left floating or tied to GND per layout best practice |
| 3 GND | Digital logic ground reference | Reference for IN logic threshold; separate from analog ground but must share low-impedance return |
| 4 V+ | Positive analog supply | Bias for P-channel device; sets upper analog signal limit (V+ − 0.3V) |
| 6 IN | Digital control input | +3V-compatible logic; high = open circuit (NO = open), low = closed path (COM–NO connected) |
| 7 V− | Negative analog supply | Bias for N-channel device; sets lower analog signal limit (V− + 0.3V) |
| 8 NC | Normally closed terminal (not used in DG418L) | Unused in DG418LDY+; not bonded; must be left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| +3V logic compatibility | VIH = 2.0V / VIL = 0.8V thresholds enable direct interface with 3.3V microcontrollers without level shifters |
| Power-supply sequencing freedom | No VL pin or supply ramp order required - eliminates external diodes and simplifies power tree design |
| Rail-to-rail analog handling | Supports signals from V− + 0.3V to V+ − 0.3V - preserves full dynamic range in ±15V op-amp front-ends |
| Low charge injection (2.5pC) | Minimizes voltage step on hold capacitors in sample-and-hold stages, reducing acquisition settling time |
| Guaranteed RON flatness (4Ω max) | Maintains consistent gain across input signal range - essential for audio line-level switching and sensor scaling |
Applications
| Audio Signal Routing | Sample-and-Hold Circuits |
|---|---|
Use Scenario: Switching between microphone preamp outputs and ADC inputs in multi-channel audio interfaces. IC Role / Device Role / Timing Role: SPST NO switch isolating signal paths; controlled by FPGA GPIO during channel scan. Use Value: 35Ω RON and 4Ω flatness preserve THD <0.002% across 20Hz–20kHz; low leakage prevents DC offset drift between samples. |
Use Scenario: Capturing precise voltage levels from strain-gauge bridges in industrial data loggers. IC Role / Device Role / Timing Role: Precision analog switch connecting bridge output to hold capacitor; triggered by SAR ADC conversion start. Use Value: 2.5pC charge injection limits hold-step error to <100µV with 100nF capacitor; <5nA leakage sustains 10s hold time. |
| Communications Systems | Battery-Operated Systems |
Use Scenario: Reconfiguring filter banks in software-defined radio front-ends for multi-band operation. IC Role / Device Role / Timing Role: High-speed SPST switch selecting between bandpass filters; toggled under DSP control. Use Value: Sub-185ns tOFF enables >1MHz reconfiguration; rail-to-rail swing supports ±12V IF signal integrity. |
Use Scenario: Managing power domains and sensor signal paths in portable medical monitors. IC Role / Device Role / Timing Role: Low-leakage analog switch enabling/disabling ECG amplifier inputs during standby. Use Value: <5nA off-leakage at +85°C extends battery life; +9V to +36V single-supply operation supports Li-ion stack voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618EUA+ | Lower RON (15Ω), but only rated to +70°C; no guaranteed RON matching or flatness specs | Suitable for commercial-grade audio routing, not extended-temp industrial sampling | Select MAX4618EUA+ only if ambient temperature stays ≤+70°C and RON matching is non-critical |
| ADG1419BRUZ | SPDT configuration (NC/NO), 1.5Ω RON, but requires ≥4.5V logic drive; higher supply current (125µA) | Better for high-precision multiplexing, less suitable for simple SPST isolation with 3.3V logic | Choose ADG1419BRUZ when SPDT function and ultra-low RON outweigh +3V logic compatibility needs |
Compared with MAX4618EUA+ and ADG1419BRUZ, DG418LDY+ uniquely balances extended temperature rating (-40°C to +85°C), guaranteed RON matching/flatness, +3V logic compatibility, and low leakage - making it optimal for ruggedized test equipment and battery-powered instrumentation where parameter consistency across temperature and supply is mandatory.
Availability
DG418LDY+ is available at Aetrix Electronics and suitable for audio signal routing, sample-and-hold circuits, and battery-operated systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for DG418LDY+ 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 DG418LDY+ belongs to the DG417L/DG418L/DG419L family of +3V logic-compatible analog switches, engineered for high-accuracy signal routing in systems demanding low distortion, tight parameter matching, and robust operation across wide supply and temperature ranges.
FAQ
What is the maximum analog signal voltage range supported by DG418LDY+?
DG418LDY+ supports analog signals from (V− + 0.3V) to (V+ − 0.3V). With ±15V supplies, this yields a ±14.7V range; with +12V single supply (V− = 0), it supports 0.3V to 11.7V. This rail-to-rail capability ensures full utilization of op-amp output swings and ADC input ranges without clipping.
Does DG418LDY+ require specific power-supply sequencing during startup?
No. DG418LDY+ eliminates the need for controlled V+, V−, and logic supply sequencing. Unlike legacy DG418 devices, it operates safely regardless of supply ramp order - removing risk of latchup and eliminating external protection diodes in the power path.
What is the typical charge injection value for DG418LDY+, and why does it matter?
DG418LDY+ specifies 15pC (dual supply) or 2.5pC (single +12V) charge injection. This parameter determines the voltage glitch injected onto a hold capacitor during switching; low values like 2.5pC enable accurate sample-and-hold operation with minimal settling time and reduced need for correction circuitry.
Can DG418LDY+ be used with 3.3V microcontroller GPIO without level shifting?
Yes. DG418LDY+ has VIH = 2.0V and VIL = 0.8V logic thresholds, making it fully compatible with 3.3V CMOS/TTL outputs. A 3.3V GPIO high drives the IN pin reliably, and a 0V low ensures robust turn-off - no external level translators are needed.
How does DG418LDY+ differ from the original DG418 in terms of leakage performance?
DG418LDY+ guarantees off-leakage current <5nA at +85°C, significantly tighter than the original DG418's typical 20nA spec. This improvement enables longer hold times in sample-and-hold circuits and reduces measurement drift in high-impedance sensor interfaces operating at elevated temperatures.
DG418LDY+ 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG418LDY+ FAQ
1.How can I place an order for DG418LDY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418LDY+ 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 DG418LDY+ reliable?
The price and inventory of DG418LDY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418LDY+ is usually 5 days.
3.What payment methods are accepted for DG418LDY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418LDY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418LDY+?
DG418LDY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418LDY+ 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 DG418LDY+?
For technical support, including DG418LDY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418LDY+ requirements.
6.How does Aetrix verify that DG418LDY+ is sourced from the original manufacturer or authorized distributors?
All DG418LDY+ 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 DG418LDY+ meets industry standards.
7.What is the process for return or replacement of DG418LDY+?
All DG418LDY+ units undergo pre-shipment inspection (PSI). If there is an issue with DG418LDY+, 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 DG418LDY+ part is unused and in its original packaging.
Return procedure for DG418LDY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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