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Analog Devices Inc./Maxim Integrated DG418CY
- Part No.:
- DG418CY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG418CY.pdf
- Description:
- IC SWITCH SPST-NOX1 35OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,820
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Product details
Overview
DG418CY from Maxim Integrated is a precision CMOS single-pole/single-throw (SPST) analog switch with normally open configuration, 35Ω max on-resistance, <5nA off-leakage at +85°C, and 175ns max turn-on time. It operates from ±4.5V to ±20V bipolar or +10V to +30V single supply, enabling rail-to-rail signal routing in battery-operated test equipment and audio signal paths.
For engineers reviewing the DG418CY datasheet, DG418CY pinout, DG418CY application, or DG418CY equivalent, this page delivers verified electrical parameters, package mapping, real-world use scenarios, and two confirmed alternative parts for SPST analog switching in industrial and communications systems.
Technical Context
The DG418CY uses a 44V silicon-gate CMOS process to achieve guaranteed on-resistance matching ≤3Ω between channels and flatness ≤4Ω over the full analog range under bipolar supply operation. Its TTL/CMOS-compatible logic input (VL = 5V or V+) enables direct interfacing with microcontrollers and FPGAs without level-shifting.
Charge injection is limited to 10pC max, and ESD tolerance meets 2000V minimum per Method 3015.7. Off-isolation rejection ratio reaches 68dB at 1MHz, supporting high-fidelity signal integrity in sample-and-hold and guidance control circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RDS(ON)) | 35Ω max at +25°C - ensures minimal signal attenuation and voltage drop in precision analog paths |
| On-Resistance Flatness | 4Ω max over signal range - maintains consistent gain and linearity across ±15.5V analog swing |
| Turn-On Time (tON) | 175ns max - supports fast multiplexing in high-speed data acquisition up to ~5MHz effective bandwidth |
| Off-Leakage Current | <5nA at +85°C - preserves accuracy in high-impedance sample-and-hold and sensor front-ends |
| Charge Injection | 10pC max - minimizes voltage glitch on hold capacitors, critical for sub-12-bit ADC interface stability |
| Supply Range | ±4.5V to ±20V bipolar or +10V to +30V single - enables flexible power architecture in portable and industrial gear |
| ESD Tolerance | 2000V min (Method 3015.7) - reduces need for external protection in field-deployable test equipment |
Pinout & Package
DG418CY is supplied in an 8-pin SO (Small Outline) package, RoHS-compliant, with 1.27mm pitch and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Analog-Switch Source Terminal (normally open) | Input node that connects to load only when switch is enabled; floating when disabled |
| 2 | No Internal Connection | Unbonded pad - must be left unconnected on PCB; no thermal or electrical function |
| 3 | Logic Ground (GND) | Reference for VL and digital inputs; separate from analog ground to reduce noise coupling |
| 4 | Analog-Signal Positive Supply (V+) | Bias rail for analog channel conduction; sets upper limit of rail-to-rail signal handling |
| 5 | Logic-Level Positive Supply (VL) | Supplies internal logic; set to 5V for TTL compatibility or tied to V+ for CMOS-level inputs |
| 6 | Logic-Level Input (IN) | Active-high control: logic high enables switch, logic low disconnects source from drain |
| 7 | Analog-Signal Negative Supply (V−) | Bias rail for analog channel conduction; sets lower limit of rail-to-rail signal handling |
| 8 | Analog-Switch Drain Terminal (D) | Output node connected to source when switch is on; high-impedance when off |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - essential for ±15V instrumentation front-ends |
| Guaranteed RDS(ON) match ≤3Ω | Enables matched-channel applications like differential signal switching and precision gain-setting networks |
| Low power consumption (35µW max) | Reduces thermal drift and extends battery life in portable modems and fax machines |
| TTL/CMOS logic compatibility | Eliminates external level shifters when interfacing with 3.3V/5V microcontrollers or CPLDs |
| 2000V ESD tolerance (Method 3015.7) | Improves manufacturing yield and field reliability in unshielded test equipment and PBX interfaces |
Applications
| Sample-and-Hold Circuits | Communications Systems |
|---|---|
|
Use Scenario: Capturing and holding analog sensor outputs prior to ADC conversion in data loggers. IC Role / Device Role / Timing Role: DG418CY acts as the precision sampling gate, isolating the hold capacitor during acquisition phase. Use Value: Low 10pC charge injection prevents hold-step errors; <5nA leakage at +85°C ensures >10ms hold time stability. |
Use Scenario: Routing voice or modem signals between line interface units and codec channels in PBX hardware. IC Role / Device Role / Timing Role: DG418CY serves as a bidirectional analog path selector with break-before-make timing inherent to SPST topology. Use Value: 68dB off-isolation at 1MHz suppresses crosstalk between adjacent voice channels; rail-to-rail support handles ±12V line signaling. |
| Test Equipment | Battery-Operated Systems |
|
Use Scenario: Multiplexing calibration references and DUT signals in handheld multimeters and signal generators. IC Role / Device Role / Timing Role: DG418CY functions as a low-distortion signal path enabler, selected via MCU GPIO. Use Value: 35Ω RDS(ON) introduces <0.05% gain error in 10kΩ reference paths; 35µW standby power minimizes self-heating drift. |
Use Scenario: Enabling/disabling sensor bias rails and signal chains in portable environmental monitors. IC Role / Device Role / Timing Role: DG418CY provides power-gating control for analog subsystems using single +12V supply. Use Value: Single-supply operation (+10V to +30V) eliminates negative rail generation; <5nA leakage preserves battery charge over months of sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1419BRMZ | SPDT configuration (NC/NO), 1.5Ω RDS(ON), requires dual supply only; no single-supply mode | Not suitable for simple ON/OFF gating; better for signal routing where polarity inversion or dual-path selection is needed | Select ADG1419BRMZ only if SPDT functionality and lower on-resistance outweigh need for single-supply operation. |
| TS5A23157DCUR | Single-supply only (1.65V–5.5V), 0.9Ω RDS(ON), 1.5pC charge injection, but max analog range limited to VCC–0.2V | Restricted to low-voltage logic domains; incompatible with ±15V or +24V industrial signal levels | Choose TS5A23157DCUR for 3.3V embedded systems requiring ultra-low distortion, not for wide-range analog switching. |
Compared with DG418CY, ADG1419BRMZ offers superior on-resistance and SPDT flexibility but lacks single-supply capability, while TS5A23157DCUR delivers lower charge injection and power at the cost of voltage range - making DG418CY uniquely suited for wide-supply, rail-to-rail SPST switching in industrial test and comms hardware.
Availability
DG418CY is available at Aetrix Electronics and suitable for test equipment, communications systems, and battery-operated systems requiring stable component supply, long-lifecycle availability, and guaranteed parametric performance across temperature.
Supply support for DG418CY 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, communications, and computing applications.
DG418CY belongs to Maxim's legacy high-voltage analog switch family, engineered specifically for robust, wide-supply-range signal routing in mission-critical test, military radio, and telecom infrastructure equipment.
FAQ
What is the maximum analog signal range supported by DG418CY?
DG418CY supports rail-to-rail analog signals from V− to V+, with absolute maximum ratings of V+ ≤ 44V referenced to V−. Under bipolar ±15V operation, the usable analog range is ±15.5V; under +12V single supply (V− = 0V), it spans 0V to 11.8V. This range is confirmed in the Electrical Characteristics table and Typical Operating Characteristics curves DG417-03 and DG417-04.
Does DG418CY require a negative supply to operate?
No - DG418CY operates with either bipolar supplies (±4.5V to ±20V) or a single positive supply (+10V to +30V), where V− is connected to ground. The datasheet explicitly states "connect V− to 0V when operating with a single supply" and provides full single-supply electrical characteristics on page 4. DG418CY functionality is fully preserved in single-supply mode.
What is the logic voltage requirement for the IN pin of DG418CY?
The IN pin of DG418CY accepts TTL- or CMOS-compatible logic levels. When VL = 5V, VINH ≥ 2.4V and VINL ≤ 0.8V; when VL is tied to V+, logic thresholds scale with supply (e.g., VINH ≈ 0.7×V+). This dual-mode compatibility is specified in the "Existing Features" section and Electrical Characteristics tables for both dual and single-supply conditions.
Can DG418CY be used in audio signal routing applications?
Yes - DG418CY is listed in the official Applications section for "Audio Signal Routing." Its low 10pC charge injection, 68dB off-isolation at 1MHz, and rail-to-rail capability enable clean switching of line-level and microphone signals without audible pop or crosstalk, especially in professional audio mixers and VoIP gateways where ±12V or +24V supplies are common.
Is DG418CY pin-compatible with older DG418 variants?
Yes - DG418CY shares identical 8-pin SO packaging, pinout, and functional behavior with DG418CJ, DG418DJ, and DG418DY. The "New Features" section confirms it is a plug-in upgrade for industry-standard DG418 devices, with improved RDS(ON) matching and leakage performance while maintaining full electrical and mechanical backward compatibility.
DG418CY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 3Ohm (Max)
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 175ns, 145ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG418CY FAQ
1.How can I place an order for DG418CY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418CY 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 DG418CY reliable?
The price and inventory of DG418CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418CY is usually 5 days.
3.What payment methods are accepted for DG418CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418CY?
DG418CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418CY 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 DG418CY?
For technical support, including DG418CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418CY requirements.
6.How does Aetrix verify that DG418CY is sourced from the original manufacturer or authorized distributors?
All DG418CY 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 DG418CY meets industry standards.
7.What is the process for return or replacement of DG418CY?
All DG418CY units undergo pre-shipment inspection (PSI). If there is an issue with DG418CY, 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 DG418CY part is unused and in its original packaging.
Return procedure for DG418CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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