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Analog Devices Inc./Maxim Integrated DG419LDY+
- Part No.:
- DG419LDY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG419LDY+.pdf
- Description:
- IC SWITCH SPDT X 1 35OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:194
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Product details
Overview
DG419LDY+ from Maxim Integrated is a precision SPDT analog switch IC designed for bidirectional signal routing in ±15V or +12V systems, featuring 35Ω max on-resistance, <5nA off-leakage at +85°C, and +3V logic-compatible control (VIH = 2.0V, VIL = 0.8V), widely used in audio signal routing and test equipment.
For engineers reviewing the DG419LDY+ datasheet, DG419LDY+ pinout, DG419LDY+ application, or DG419LDY+ equivalent, key selection criteria include guaranteed RON matching (≤3Ω), rail-to-rail analog signal handling, break-before-make timing (≤30ns), and extended temperature operation from –40°C to +85°C in SO-8 package.
Technical Context
The DG419LDY+ implements a CMOS-based SPDT architecture with one normally closed (NC) and one normally open (NO) channel sharing a common (COM) terminal, enabling signal path selection without polarity constraints. Its digital input accepts TTL/CMOS levels directly, eliminating level-shifting circuitry when interfaced with +3V microcontrollers.
It supports dual-supply operation (±4.5V to ±20V) and single-supply operation (+9V to +36V), with power-supply sequencing-free startup-no required VL rail or strict V+, V−, GND power-up order. Charge injection is specified at ≤15pC (dual supply) and ≤2.5pC (single +12V), critical for sample-and-hold accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | SPDT (1 NC + 1 NO), bidirectional conduction, rail-to-rail analog signal range |
| On-Resistance (RON) | 35Ω max at ±15V supplies; enables low insertion loss in precision signal paths |
| RON Matching | ≤3Ω max between NC and NO channels; ensures matched gain/attenuation in differential or switching-matrix applications |
| Off-Leakage Current | <5nA at +85°C; preserves DC accuracy in high-impedance sensor or battery-monitoring circuits |
| Logic Compatibility | +3V compatible: VIH = 2.0V, VIL = 0.8V; interfaces directly with 3.3V FPGA I/O or MCU GPIO |
| Switching Speed | tON < 175ns, tOFF < 185ns (±15V); supports >2MHz multiplexing in data acquisition systems |
| Supply Range | Single: +9V to +36V; Dual: ±4.5V to ±20V; accommodates industrial and legacy ±15V systems |
Pinout & Package
Package: 8-pin SO (SOIC-N), surface-mount, 150 mil width, RoHS-compliant, rated for –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | COM | Analog common terminal - connects to signal source or load; shared by both NC and NO paths |
| 2 | NC | Normally closed switch terminal - conducts to COM when IN = logic low (0) |
| 3 | GND | Digital logic ground reference - must be tied to system digital ground, not analog ground |
| 4 | V+ | Positive analog supply - powers internal switch core; sets upper rail of analog signal range |
| 5 | N.C. | No connection - internally unconnected; must remain floating or grounded per layout best practice |
| 6 | IN | Logic-level control input - active-high: IN = high → NO closed, NC open (break-before-make) |
| 7 | V− | Negative analog supply - sets lower rail of analog signal range; required for bipolar operation |
| 8 | NO | Normally open switch terminal - conducts to COM when IN = logic high (1) |
Key Features
| Feature | Design Value |
|---|---|
| +3V logic compatibility | VIH = 2.0V / VIL = 0.8V thresholds eliminate need for level shifters with 3.3V controllers |
| Rail-to-rail analog handling | Supports signals from V− to V+; enables full dynamic range utilization in ±12V instrumentation |
| Guaranteed RON flatness | ≤4Ω max variation across signal range; minimizes harmonic distortion in audio and DAC output paths |
| Power-supply sequencing freedom | No VL rail or strict V+/V−/GND power-up sequence required; simplifies power management design |
| Low charge injection | ≤15pC (±15V), ≤2.5pC (+12V); reduces voltage glitch in sample-and-hold and ADC front-end circuits |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Switching between multiple microphone inputs or speaker outputs in professional audio mixers. IC Role / Device Role / Timing Role: SPDT analog switch selecting signal path under microcontroller control; break-before-make prevents short-circuits during transition. Use Value: 35Ω RON and ≤0.002% THD preserve audio fidelity; rail-to-rail support handles ±10V line-level signals without clipping. |
Use Scenario: Channel selection in automated test equipment (ATE) for routing DUT signals to measurement instruments. IC Role / Device Role / Timing Role: Precision SPDT switch in multi-channel relay replacement matrix; low leakage maintains DC accuracy over temperature. Use Value: <5nA off-leakage at +85°C ensures stable bias in high-Z sensor measurements; 175ns switching enables fast test cycle times. |
| Sample-and-Hold Circuits | Battery-Operated Systems |
|
Use Scenario: Sampling analog sensor outputs (e.g., thermocouple, strain gauge) into SAR ADCs with minimal hold-mode error. IC Role / Device Role / Timing Role: Low-charge-injection analog switch isolating sampling capacitor during hold phase. Use Value: ≤2.5pC charge injection at +12V supply limits sampling error to <1 LSB in 16-bit systems; low power consumption extends hold time. |
Use Scenario: Power domain isolation and signal routing in portable medical devices or handheld meters operating from Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent-current analog switch enabling battery-saving sleep modes and signal path reconfiguration. Use Value: I+/I−/IGND ≤10µA at +85°C minimizes standby drain; +9V to +36V single-supply operation supports wide battery voltage range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4619ESE+ | Lower RON (15Ω typ), but only rated to +75°C; no guaranteed RON matching spec | Better performance in room-temp consumer audio; unsuitable for extended industrial temp range | Select if ambient stays ≤75°C and lower on-resistance is prioritized over temperature rating |
| ADG1419BRMZ | Higher supply voltage limit (±22V), 1.8V logic compatible, but higher charge injection (30pC) | Compatible with low-voltage controllers; less suitable for precision sample-and-hold where charge injection dominates error | Select for 1.8V/3.3V mixed-signal systems requiring wider supply margin, accepting higher glitch energy |
Compared with MAX4619ESE+ and ADG1419BRMZ, the DG419LDY+ uniquely delivers guaranteed RON matching (≤3Ω) and <5nA off-leakage at +85°C in an extended-temperature SO-8 package-making it the preferred choice for high-reliability test equipment and military-grade audio routing where parameter correlation across channels and temperature stability are mandatory.
Availability
DG419LDY+ is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and battery-operated systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for DG419LDY+ 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, communications, and computing applications.
The DG419LDY+ belongs to Maxim's precision analog switch product line, engineered for applications demanding low distortion, tight parameter matching, and robust operation in harsh electrical environments-including guidance systems, PBX infrastructure, and military radios.
FAQ
What is the maximum analog signal voltage range supported by the DG419LDY+?
The DG419LDY+ supports rail-to-rail analog signals from V− to V+. With ±15V supplies, this yields a full ±15V range; with +12V single supply (V− = 0V), the range is 0V to +12V. Absolute maximum ratings allow VCOM, VNC, or VNO up to (V− − 0.3V) to (V+ + 0.3V), clamped by internal diodes. Exceeding these may cause permanent damage.
Does the DG419LDY+ require a separate logic supply (VL)?
No, the DG419LDY+ does not require a VL supply. Its digital input is +3V logic-compatible with VIH = 2.0V and VIL = 0.8V, allowing direct interface to 3.3V microcontrollers or FPGAs. Unlike legacy DG419 devices, the DG419LDY+ eliminates VL dependency and supports power-supply sequencing-free operation-any V+, V−, and GND power-up order is acceptable.
What is the guaranteed on-resistance matching between NC and NO channels in the DG419LDY+?
The DG419LDY+ guarantees on-resistance matching (∆RON) of ≤3Ω maximum between its NC and NO channels when measured under identical conditions (V+ = +15V, V− = −15V, ICOM = 10mA, VNC/VNO = ±10V, TA = −40°C to +85°C). This tight matching ensures consistent gain or attenuation across switched paths in instrumentation and audio summing applications.
Can the DG419LDY+ operate from a single +9V supply?
Yes, the DG419LDY+ supports single-supply operation from +9V to +36V. When using +9V, V− must be connected to ground (0V), and the analog signal range becomes 0V to +9V. Note that RON increases to 125Ω max (vs. 35Ω at ±15V), and switching times lengthen slightly-but all functionality, including logic compatibility and leakage specs, remains fully guaranteed across the full temperature range.
Is the DG419LDY+ pin-compatible with the older DG419 or MAX319?
The DG419LDY+ is a plug-in upgrade for DG419 and MAX319, sharing identical 8-pin SO pinout and function mapping. However, it improves upon those predecessors with lower leakage, tighter RON matching, and elimination of VL requirements. No PCB changes are needed for drop-in replacement-though designers should verify supply decoupling and thermal layout meet DG419LDY+'s updated power dissipation profile.
DG419LDY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- 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):
- -
- -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-SOIC
DG419LDY+ FAQ
1.How can I place an order for DG419LDY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG419LDY+ 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 DG419LDY+ reliable?
The price and inventory of DG419LDY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG419LDY+ is usually 5 days.
3.What payment methods are accepted for DG419LDY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG419LDY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG419LDY+?
DG419LDY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG419LDY+ 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 DG419LDY+?
For technical support, including DG419LDY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG419LDY+ requirements.
6.How does Aetrix verify that DG419LDY+ is sourced from the original manufacturer or authorized distributors?
All DG419LDY+ 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 DG419LDY+ meets industry standards.
7.What is the process for return or replacement of DG419LDY+?
All DG419LDY+ units undergo pre-shipment inspection (PSI). If there is an issue with DG419LDY+, 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 DG419LDY+ part is unused and in its original packaging.
Return procedure for DG419LDY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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