DG419DY-T1-E3 - Precision CMOS SPDT Analog Switch | Vishay
料号： DG419DY-T1-E3 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.2 | $1.20 |
| 10 | $1.05 | $10.50 |
| 100 | $0.92 | $92.00 |
| 500 | $0.78 | $390.00 |
| 1,000 | $0.65 | $650.00 |
| 3,000 | $0.55 | $1,650.00 |
DG419DY-T1-E3 概述
An analog switch (also called a CMOS switch or bilateral switch) is an active semiconductor device that uses MOSFET transistors to pass or block analog signals. It belongs to the broader hierarchy of interface ICs -> analog switches/multiplexers -> signal conditioning -> data acquisition. Unlike electromechanical relays, CMOS analog switches offer nanosecond switching, low power draw, no contact bounce, and zero off-state current leakage when fully turned off, making them ideal for solid-state signal multiplexing in modern mixed-signal designs.
Key features of the DG419DY-T1-E3 include a typical on-resistance of 35 ohms, low charge injection, break-before-make switching action, and TTL/CMOS-compatible digital logic inputs. The device operates from a single 10 V to 30 V supply or from dual ±5 V to ±15 V supplies, with a logic threshold that allows direct interface to 3.3 V or 5 V microcontrollers. Its low power consumption (under 35 mW quiescent) and rugged ESD protection make it suitable for both portable and line-powered designs.
The DG419DY-T1-E3 uses a precision CMOS architecture with on-resistance matching between channels and flat on-resistance across the analog signal range, minimizing total harmonic distortion when passing audio or precision DC signals. The break-before-make switching topology prevents momentary shorts between input sources during channel transitions, which protects upstream drivers and downstream ADCs from current spikes.
Typical applications include precision test equipment, guidance and control systems, battery-powered instrumentation, data acquisition front-ends, audio signal routing, sample-and-hold circuits, and programmable gain amplifiers. The wide operating voltage range and high off-isolation make it equally suitable for industrial 4-20 mA signal routing and for low-voltage sensor multiplexing.
When designing with the DG419DY-T1-E3, observe the absolute maximum supply voltage of 44 V to avoid permanent damage. Place 0.1 µF decoupling capacitors close to V+ and V- pins, and ensure the logic input does not exceed V+ or fall below ground. For high-impedance source signals, add a small series resistor at the output to limit capacitive kickback during switching transitions.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers select the right CMOS switch and validate its drop-in compatibility against the most popular Vishay, Maxim Integrated, and Texas Instruments equivalents.
直接替换替代料： DG419DY-T1-E3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： DG419DY-T1-E3 （相同外形与封装尺寸） ——差异在于 Analog Signal Range, Number of Channels, Package, Switch Type.
快速对比工具——选择替代料号进行并排对比：
DG419DY-E3
✅ 直接替换📋 参考替代料（不在目录中）
DG419BDY-T1-E3
✅ 直接替换📋 参考替代料（不在目录中）
DG419LDY-T1-E3
✅ 直接替换📋 参考替代料（不在目录中）
DG419DY-T1-E3 最大额定值与电气特性
| Switch Type | SPDT (Single-Pole Double-Throw) |
| Number of Channels | 1 |
| On-Resistance (Ron) | 35 ohm (typical) |
| Supply Voltage Range (Single) | 10 V to 30 V |
| Supply Voltage Range (Dual) | ±5 V to ±15 V |
| Analog Signal Range | 0 V to V+ (rail-to-rail switch) |
| 工作温度范围 | -40 °C to +85 °C |
| 封装 | 8-SOIC (NSOIC) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (per -E3 suffix) |
DG419DY-T1-E3 引脚配置
| 引脚 1 | IN — Logic input - selects between D-S1 (logic high) and D-S2 (logic low) |
| 引脚 2 | GND — Ground reference for logic and analog signals |
| 引脚 3 | V- — Negative analog supply (dual-supply mode); tied to GND in single-supply mode |
| 引脚 4 | D — Common drain terminal of the SPDT switch (analog signal) |
| 引脚 5 | S2 — Source 2 (NC when IN=high) - alternate analog signal path |
| 引脚 6 | V+ — Positive analog supply (single or dual mode) |
| 引脚 7 | S1 — Source 1 (NO when IN=high) - default analog signal path |
| 引脚 8 | VL — Logic supply input - powers the digital control interface |
典型应用
DG419DY-T1-E3 适用于 6 应用s: Precision Test Equipment Signal Routing, Guidance and Control Systems, Battery-Powered Instrumentation, Data Acquisition Front-Ends, Audio Signal Routing, Programmable Gain Amplifier Switching.
Precision Test Equipment Signal Routing
The DG419DY-T1-E3 routes precision analog signals between test points, instrumentation amplifiers, and ADC inputs in benchtop and ATE test systems. Its 35 ohm typical on-resistance and break-before-make switching ensure the upstream source is never momentarily shorted to the alternate channel during transition - critical when protecting sensitive instrumentation front-ends from current spikes. With TTL/CMOS-compatible logic, the part interfaces directly to 3.3 V or 5 V FPGA/microcontroller GPIO without level shifters. Compared to electromechanical relays, the DG419DY-T1-E3 offers nanosecond switching, no contact bounce, and zero off-state current, enabling faster test sequencing and higher measurement throughput in automated production testers.
推荐
Guidance and Control Systems
In aerospace and defense guidance systems, the DG419DY-T1-E3 multiplexes redundant sensor channels (gyroscopes, accelerometers, magnetometers) into a single ADC input for redundancy monitoring and fault detection. Its -40 °C to +85 °C operating range and CMOS radiation-tolerant architecture suit harsh-environment designs. The break-before-make action prevents sensor-to-sensor cross-conduction that could otherwise bias the redundant chain. Dual ±15 V supply operation allows direct interface to legacy analog signal chains without additional level translation, and the 35 ohm Ron introduces less than 0.1% gain error when feeding a 10 kilohm ADC input.
推荐
Battery-Powered Instrumentation
The DG419DY-T1-E3 is well suited to handheld multimeters, portable data loggers, and battery-powered sensor modules where power budget and signal accuracy both matter. Quiescent current is in the microamp range, allowing the switch to remain in-circuit during sleep modes without draining the battery. With ±5 V dual supply operation, it can directly route 0-5 V sensor signals from thermocouples, strain gauges, or pH probes into a low-power ADC. The CMOS switch architecture eliminates the inductive kickback and EMI associated with reed relays, which is particularly important in RF-sensitive instrumentation where conducted emissions must meet FCC/CE limits.
推荐
Data Acquisition Front-Ends
In multi-channel data acquisition systems, the DG419DY-T1-E3 acts as the channel-select switch between multiple sensor sources and a single high-performance ADC, simplifying PCB layout and reducing BOM cost versus discrete FET switches. The 35 ohm on-resistance is negligible compared to the typical 1 megohm ADC input impedance, preserving full-scale accuracy. Break-before-make switching prevents sample-and-hold capacitor disturbance during channel changes, which is critical for high-impedance sensor sources. For systems requiring more than two input channels, the DG408 (8:1) and DG409 (dual 4:1) extend the same architecture to higher channel counts in the same Vishay family.
推荐
Audio Signal Routing
The DG419DY-T1-E3 can switch line-level audio signals between multiple sources (CD, streaming, phono) into a single pre-amplifier input in home audio and pro-audio mixers. Its low on-resistance flatness across the audio band minimizes total harmonic distortion, and the break-before-make action eliminates the click/pop artifacts that would otherwise occur when sources are swapped. The CMOS switch exhibits no mechanical contact wear and no inductive kickback, making it ideal for systems that perform frequent source-switching operations. For studio-grade designs where absolute THD must be below 0.001%, designers may still prefer audio-optimized switches with tighter Ron matching.
推荐
Programmable Gain Amplifier Switching
The DG419DY-T1-E3 selects feedback resistor networks in a programmable gain amplifier (PGA), allowing a single op-amp stage to realize multiple discrete gain settings (e.g., x1, x10, x100). Its low Ron contributes less than 0.1% gain error even at the highest gain setting, and the break-before-make action prevents momentary open-loop conditions during gain transitions. CMOS switches are far smaller and faster than electromechanical relays used in traditional PGA designs, enabling PGA subsystems that fit in 10 mm x 10 mm PCB area. For instrumentation-grade PGAs requiring gains above 1000, the lower-leakage DG419LDY variant is recommended.
推荐
推荐产品汇总
工程参考数据： DG419DY-T1-E3 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | DG419DY-E3 | DG419BDY-T1-E3 | DG419LDY-T1-E3 |
|---|---|---|---|---|
| Package | 8-SOIC (NSOIC) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Vishay Siliconix | Vishay Siliconix - same | Vishay Siliconix - same | Vishay Siliconix - same |
| Supply Voltage Range | 10 V to 30 V (single) / ±5 V to ±15 V (dual) | 10 V to 30 V / ±5 V to ±15 V (same) | 10 V to 30 V / ±5 V to ±15 V (same) | 10 V to 30 V / ±5 V to ±15 V (same) |
| Number of Channels | 1 (SPDT) | 1 (SPDT) - same | 1 (SPDT) - same | 1 (SPDT) - same |
| Packaging Variant | Tape & Reel (-T1-E3) | Tube (-E3) | Tape & Reel (-T1-E3) | Tape & Reel (-T1-E3) |
| RoHS Status | Compliant (-E3) | Compliant (-E3) | Compliant (-E3) | Compliant (-E3) |
| Logic Interface | TTL/CMOS compatible | TTL/CMOS compatible | TTL/CMOS compatible | TTL/CMOS compatible |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
关键差异点
- Wider supply voltage range than legacy equivalents （对比 MAX319CPA+ (Maxim Integrated))
- Lower on-resistance than standard grade in same family （对比 DG419DY-T1-E3 vs DG419BDY-T1-E3 (Vishay))
- Modern CMOS switch architecture with break-before-make action （对比 Electromechanical relay equivalents)
设计说明
Place 0.1 µF ceramic decoupling capacitors as close as possible to the V+ (pin 6) and V- (pin 3) pins. For dual-supply operation, add a 10 µF bulk tantalum or aluminum electrolytic capacitor on each supply rail within 25 mm of the device. The VL pin (pin 8) accepts a separate logic supply if level translation to a lower-voltage MCU is required; otherwise connect VL to V+ to minimize pin count.
Keep analog signal traces (D, S1, S2) short and direct, and route them away from digital control traces (IN, VL) to minimize capacitive coupling and digital feedthrough. Use a grounded guard ring around the analog switch terminals when routing high-impedance signals (>10 kilohm source) to reduce leakage-induced offset errors. The exposed copper area under the SOIC-8 should connect to the analog ground plane for thermal dissipation and EMI shielding.
Do not apply analog signals to D, S1, or S2 that exceed V+ or fall below V- - the internal MOSFET body diodes will forward-conduct and may latch up the part. When operating from a single supply, V- must be tied to GND; floating V- will cause unpredictable switching behavior. For signals near the supply rails, add a small series resistor (100 ohm to 1 kilohm) at the analog output to limit capacitive kickback current into the next stage.
合规信息
The -E3 suffix confirms RoHS compliance per Vishay Siliconix part numbering convention. Halogen-free status was not specified in the verified distributor data and is marked unknown.
