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Analog Devices Inc./Maxim Integrated DG418LEUA
- Part No.:
- DG418LEUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DG418LEUA.pdf
- Description:
- IC SWITCH SPST-NOX1 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:38,014
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Product details
Overview
DG418LEUA 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 interfaces.
For engineers reviewing the DG418LEUA datasheet, DG418LEUA pinout, DG418LEUA application, or DG418LEUA equivalent, key selection criteria include guaranteed RON matching (≤3Ω), rail-to-rail analog signal handling (±15V or 0–+36V), +3V logic compatibility (VIH = 2.0V, VIL = 0.8V), and µMAX-8 package suitability for space-constrained industrial control modules.
Technical Context
The DG418LEUA implements a fully differential CMOS transmission gate architecture with matched P- and N-channel devices to achieve low, flat on-resistance across the full analog range. Its digital input stage uses threshold-limited Schmitt-trigger-like behavior to ensure robust +3V TTL/CMOS compatibility without external level-shifting.
It supports dual-supply operation (±4.5V to ±20V) and single-supply operation (+9V to +36V), with power-supply sequencing-free startup-eliminating the need for controlled V+, VL, then V− ramping required by legacy DG418 variants. Charge injection is limited to 15pC (typ), critical for sample-and-hold accuracy.
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 - enables accurate differential signal switching without channel-to-channel gain mismatch |
| Off-Leakage Current | <5nA at +85°C - preserves voltage integrity in high-impedance sample-and-hold or sensor front-ends over temperature |
| Turn-On/Off Time | 175ns / 185ns max - supports >1MHz multiplexed data acquisition without timing-induced distortion |
| Analog Signal Range | Rail-to-rail: (V− − 0.3V) to (V+ + 0.3V) - allows full utilization of supply rails for maximum dynamic range |
| Logic Compatibility | +3V TTL/CMOS: VIH = 2.0V, VIL = 0.8V - interfaces directly with microcontrollers and FPGAs without level shifters |
| Supply Range | Single: +9V to +36V; Dual: ±4.5V to ±20V - supports wide-range industrial and military power architectures |
Pinout & Package
Package: 8-pin µMAX (3mm × 3mm, 0.5mm pitch), rated for −40°C to +85°C operation. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COM | Analog common terminal | Signal path junction point; connects to NO when enabled (normally open configuration) |
| 2 NC | 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 input; separate from analog V− but should be low-impedance bonded in PCB layout |
| 4 V+ | Analog positive supply | Bias source for internal P-channel devices; sets upper analog rail limit |
| 6 IN | Logic control input | +3V-compatible digital enable; high = ON (closed), low = OFF (open) for DG418L function |
| 7 V− | Analog negative supply | Bias source for internal N-channel devices; sets lower analog rail limit |
| 8 NO | Analog normally open terminal | Switch output that 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 external level-shifting circuitry for MCU/FPGA interfacing |
| Power-supply sequencing-free operation | No required V+, VL, V− ramp order - simplifies power management design and avoids latch-up risk during cold-start |
| Rail-to-rail analog signal handling | Supports signals from (V− − 0.3V) to (V+ + 0.3V) - maximizes usable input range without clipping in ±15V systems |
| Guaranteed RON flatness | 4Ω max variation across signal range - maintains consistent gain and linearity in precision measurement paths |
| Low charge injection | 15pC typical - minimizes voltage glitch on hold capacitors, critical for sub-12-bit ADC sample-and-hold accuracy |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Selecting between multiple microphone or line-level inputs in a portable audio mixer. IC Role / Device Role / Timing Role: SPST analog switch controlling signal path continuity with minimal THD (0.002%) and crosstalk (−86dB). Use Value: Preserves wideband fidelity and channel separation without requiring op-amp buffering or trimming. |
Use Scenario: Channel selection in automated test equipment scanning 16 sensor inputs into a single DMM or scope input. IC Role / Device Role / Timing Role: High-speed, low-leakage switch enabling >1kHz scan rates with stable offset and gain calibration. Use Value: Eliminates manual reconnection and reduces system drift via guaranteed RON matching ≤3Ω across channels. |
| Battery-Operated Systems | Guidance and Control Interfaces |
|
Use Scenario: Power-gating unused analog subsystems (e.g., GPS RF front-end, IMU bias networks) in UAV telemetry modules. IC Role / Device Role / Timing Role: Low-quiescent-current (10µA max I+) SPST switch isolating leakage paths during sleep mode. Use Value: Extends operational runtime by reducing off-state current to <5nA at +85°C while maintaining fast wake-up response. |
Use Scenario: Isolating redundant inertial measurement unit (IMU) outputs before voting logic in flight control computers. IC Role / Device Role / Timing Role: Fault-tolerant analog switch providing fail-safe signal disconnection with break-before-make timing (1ns). Use Value: Prevents short-circuit faults between active and standby IMU channels during switchover sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX318EUA | Same pinout, identical µMAX-8 package; RON = 35Ω max but higher charge injection (25pC typ) and no guaranteed RON matching spec | Acceptable for non-critical audio routing where leakage <10nA suffices; not recommended for precision sample-and-hold | Select MAX318EUA only if legacy footprint reuse is mandatory and RON matching is not required. |
| ADG1419BRMZ | SPDT configuration (NC/NO), 4.7Ω RON, but requires ≥4.5V logic drive and lacks +3V compatibility; SO-10 package | Suitable for bidirectional signal routing in 5V systems; incompatible with 3.3V microcontroller direct drive | Choose ADG1419BRMZ when lower on-resistance and SPDT functionality outweigh footprint change and logic-level constraints. |
Compared with MAX318EUA and ADG1419BRMZ, the DG418LEUA uniquely combines +3V logic compatibility, guaranteed RON matching ≤3Ω, and µMAX-8 footprint-making it the only option for compact, low-voltage, high-matching analog multiplexing in extended-temperature industrial designs.
Availability
DG418LEUA is available at Aetrix Electronics and suitable for test equipment multiplexing, battery-operated telemetry systems, and guidance and control interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG418LEUA 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 belongs to Maxim's precision analog switch product line, engineered for signal integrity-critical applications including data acquisition, instrumentation, and ruggedized communications where rail-to-rail operation and low leakage are essential.
FAQ
What is the maximum analog signal voltage range supported by the DG418LEUA?
The DG418LEUA supports rail-to-rail analog signals from (V− − 0.3V) to (V+ + 0.3V). With ±15V dual supplies, this yields a usable range of −15.3V to +15.3V; with +36V single supply, it supports 0V to +36.3V. This specification is guaranteed across the full −40°C to +85°C operating temperature range and enables full utilization of supply headroom in precision systems without signal clipping.
Does the DG418LEUA require specific power-supply sequencing during startup?
No-the DG418LEUA features power-supply sequencing-free operation. Unlike legacy DG418 switches, it does not require V+, VL, then V− ramping to avoid latch-up. Any power-up sequence is acceptable as long as absolute maximum ratings (e.g., V+ ≤ 44V referenced to V−) are not exceeded. This simplifies power architecture design in field-deployable equipment where supply timing is uncontrolled.
What is the guaranteed on-resistance matching between DG418LEUA units, and why does it matter?
The DG418LEUA guarantees on-resistance matching of ≤3Ω between units under identical conditions (V+ = +15V, V− = −15V, ICOM = 10mA, VNO = ±10V, TA = −40°C to +85°C). This tight matching ensures consistent gain and minimal channel-to-channel error in multi-channel data acquisition systems, eliminating the need for per-channel calibration in medical or test instrumentation applications.
Can the DG418LEUA operate from a single +12V supply, and what performance changes occur?
Yes-the DG418LEUA operates from a single +12V supply (V+ = +12V, V− = 0V), supporting analog signals from 0V to +12.3V. In this configuration, RON increases to 125Ω max (vs. 35Ω max at ±15V), and switching times rise to 400ns max tON. However, logic compatibility (VIH = 2.0V, VIL = 0.8V) and leakage (<5nA at +85°C) remain unchanged, making it viable for cost-sensitive 12V industrial controls where speed is secondary to simplicity.
Is the DG418LEUA pin-compatible with the older DG418D or DG418J packages?
No-the DG418LEUA uses an 8-pin µMAX package (3mm × 3mm), whereas DG418D is 8-pin SO and DG418J is 8-pin plastic DIP. While all share identical pin functions and logic behavior, physical dimensions, thermal characteristics, and PCB footprints differ. Migration requires board redesign; however, electrical performance (RON, leakage, timing) of DG418LEUA exceeds legacy versions, justifying layout updates for new designs.
DG418LEUA 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:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
DG418LEUA FAQ
1.How can I place an order for DG418LEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418LEUA 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 reliable?
The price and inventory of DG418LEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418LEUA is usually 5 days.
3.What payment methods are accepted for DG418LEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418LEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418LEUA?
DG418LEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418LEUA 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?
For technical support, including DG418LEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418LEUA requirements.
6.How does Aetrix verify that DG418LEUA is sourced from the original manufacturer or authorized distributors?
All DG418LEUA 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 meets industry standards.
7.What is the process for return or replacement of DG418LEUA?
All DG418LEUA units undergo pre-shipment inspection (PSI). If there is an issue with DG418LEUA, 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 part is unused and in its original packaging.
Return procedure for DG418LEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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