DG419DY+ - 35Ω Precision CMOS SPDT Switch | Analog Devices
부품 번호: DG419DY+ ✓ 활성DG419DY+ 개요
An analog switch is an electronic routing component that connects or disconnects signal paths under digital control. The SPDT architecture transfers one common terminal between two switched terminals, making it suitable for signal selection, polarity routing, test-point isolation, and bidirectional signal-path control. As a precision CMOS switch, the DG419DY+ belongs to the interface IC and analog switch hierarchy while adding low power consumption and bidirectional operation.
The DG419 family combines matched on-resistance, flat on-resistance behavior, low charge injection, and low power consumption. Maximum on-resistance matching of 3 Ω supports applications where closely matched paths reduce gain or timing errors. The specified on-resistance flatness of 4 Ω limits resistance variation as the analog voltage changes, which is valuable in precision measurement and signal-conditioning systems. The improved DG419 design also provides an ESD tolerance of 2000 V minimum under Method 3015.7.
The switch operates bidirectionally, allowing signals to flow through the selected path in either direction. Its CMOS implementation supports low power dissipation without requiring a normally closed mechanical contactor. Charge injection can create transient errors when the control state changes, so systems using the switch for sampling or high-impedance measurements should account for control timing, source impedance, and downstream capacitance.
Typical applications include precision test equipment, guidance and control systems, battery-powered instruments, data-acquisition front ends, and switching networks for low-frequency analog signals. The DG419DY+ is particularly appropriate when a compact 8-SOIC footprint, matched resistance, and low-noise switching are more important than the very low capacitance of specialized RF switch products.
Use the manufacturer pin-description table when assigning PCB tracks and confirm the control polarity and terminal arrangement for the exact DG419DY+ orderable device. Keep the switched signal within the stated analog and supply ratings, provide a stable control reference, and account for charge injection when the switch changes state.
This product page combines the DG419DY+ datasheet specifications, verified manufacturer and distributor sources, compatible replacement candidates, and application-oriented engineering guidance. It also distinguishes direct footprint alternatives from functional substitutes so engineers can assess drop-in replacement risk before modifying an existing analog switching circuit.
드롭인 대체품: DG419DY+ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: DG419DY+ (동일 폼 팩터 및 풋프린트) — 차이점: Analog Signal Range, Package, Number of Channels, On-Resistance Flatness, On-Resistance Matching.
DG419DY-E3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DG419LDY-T1-E3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DG419DY-T1-E3
✅ 드롭인가격 문의
데이터시트 보기 →ADG419
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TMUX6119
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DG419DY+ 최대 정격 & 전기적 특성
| Number of Circuits | 1 circuit |
| Switch Configuration | 2:1 SPDT |
| Maximum On-Resistance | 35 ohm |
| On-Resistance Matching | 3 ohm maximum |
| On-Resistance Flatness | 4 ohm maximum |
| Analog Signal Range | 10 V to 30 V |
| Supply Voltage Range | 4.5 V to 20 V |
| Maximum Supply Voltage | 44 V |
| ESD Tolerance | 2000 V minimum |
| 패키지 | 8-SOIC |
| 핀 수 | 8 pins |
| 실장 유형 | Surface mount |
| Signal Direction | Bidirectional |
| Low On-Resistance | 35 ohm maximum |
| Low Power Consumption | Less than 35 microwatt |
DG419DY+ 8-soic 핀 구성 가이드
DG419DY+(8-soic 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: DG419DY+.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
DG419DY+ 적합 용도: 6 애플리케이션s: Precision Test Equipment Signal Routing, Battery-Powered Measurement Instruments, Data-Acquisition Front Ends, Guidance and Control Systems, Signal-Path Polarity Selection, Low-Frequency Analog Signal Multiplexing.
Precision Test Equipment Signal Routing
The DG419DY+ fits precision test-equipment input paths because its 35 Ω maximum on-resistance, 3 Ω maximum matching, and 4 Ω maximum flatness help limit path-dependent measurement errors. The single SPDT topology can route a source or instrument between two signal branches without introducing a mechanical contactor. Use it with signals within the 10 V to 30 V analog range and a 4.5 V to 20 V supply. Because charge injection may disturb high-impedance nodes, place the switching edge outside the critical acquisition window and verify leakage against the required input impedance.
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Battery-Powered Measurement Instruments
DG419DY+ is appropriate for battery-powered instruments where low switch power consumption and compact 8-SOIC construction are valuable. Its low-power CMOS operation complements battery-operated data-acquisition and diagnostic equipment, while bidirectional conduction allows one common path to connect to either switched input. Keep the supply within 4.5 V to 20 V and account for the 35 Ω maximum insertion resistance when setting input impedance and gain. Verify leakage current in the actual high-impedance node because it can establish an error floor even when the selected signal path is inactive.
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Data-Acquisition Front Ends
The DG419DY+ can select between sensor or source channels in a multiplexed data-acquisition front end. Its matched on-resistance reduces channel-dependent amplitude errors, while the 4 Ω maximum flatness specification limits resistance variation as the analog level changes. The SPDT arrangement is useful when alternating between a reference and measurement node. Design the switched node to operate within the 10 V to 30 V analog range, and use suitable source impedance to control charge-injection error during each transition.
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Guidance and Control Systems
DG419DY+ supports guidance and control systems that must route control or feedback signals with predictable path resistance. The 35 Ω maximum on-resistance is suitable for many low-frequency control loops, while 3 Ω maximum matching can simplify calibration when two paths are compared. The switch conducts bidirectionally, allowing a common node to exchange signals with either selected branch. Confirm that transient control voltages remain inside the analog range and choose timing that prevents command transitions from disturbing an active control calculation.
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Signal-Path Polarity Selection
The SPDT configuration of DG419DY+ is useful for selecting between signal sources, test directions, or differently configured input paths within one compact circuit. Its bidirectional behavior supports routing in either direction without changing the switch architecture. On-resistance matching and flatness help preserve signal relationships when the selected path changes. Ensure that both switched nodes remain within the stated 10 V to 30 V analog range and that the logic-driving arrangement satisfies the device's control polarity and supply requirements.
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Low-Frequency Analog Signal Multiplexing
DG419DY+ can multiplex two low-frequency analog branches through one common terminal in instrumentation and control boards. Its 8-SOIC package simplifies routing on a compact PCB, and the guaranteed matching and flatness improve repeatability between the two paths. The switch is not intended as a high-frequency RF multiplexer, so keep interconnect short and treat its 35 Ω maximum on-resistance as a real insertion loss. Validate leakage and charge injection against the source and destination impedances before using it with high-value analog nodes.
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추천 제품 요약
엔지니어링 참조 데이터: DG419DY+ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | DG419DY-E3 | DG419LDY-T1-E3 | DG419DY-T1-E3 | ADG419 | TMUX6119 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Analog Devices | Texas Instruments |
| Switch Configuration | Single SPDT / 2:1 | Single SPDT / 2:1 | Single SPDT / 2:1 | Single SPDT / 2:1 | Single SPDT / 2:1 | Single SPDT |
주요 차별점
- Lower on-resistance than the TMUX6119 replacement path (vs TMUX6119)
- Guaranteed matching and flatness for precision path comparisons (vs ADG419)
- Direct same-footprint configuration match (vs DG419DY-E3)
- Lower on-resistance for precision signal selection (vs TMUX6119)
설계 노트
Treat the DG419DY+ as a precision low-frequency routing element rather than an RF switch. Its 35 Ω maximum on-resistance introduces measurable insertion loss, so use it where source and load impedances permit that resistance. The 3 Ω maximum matching and 4 Ω maximum flatness help when switching between calibrated paths. Keep switched-node capacitance and PCB trace length low, and verify that any downstream amplifier can tolerate the selected path resistance.
Do not assume that all DG419-family orderable suffixes are automatically interchangeable. Confirm the 8-SOIC pin mapping, control polarity, supply limits, analog signal range, and absolute maximum ratings for DG419DY+ and the proposed replacement. In particular, verify the switched versus common terminals and whether the control input responds to a low or high logic level. A footprint match alone does not establish functional compatibility.
Schedule control transitions away from critical sampling or acquisition windows. When a DG419DY+ changes state, charge injection can couple a transient into the selected node. Source impedance, load capacitance, and the timing of the control edge determine the resulting error, so simulate the complete switching path rather than relying on the on-resistance specification alone. Use the manufacturer characterization data to establish whether external capacitance or buffering is required.
Operate the DG419DY+ from a supply within its 4.5 V to 20 V rating and keep switched signals within the stated 10 V to 30 V analog range. Although the device has low power dissipation, the supply rails and control signals still require normal logic-level sequencing. Check the absolute maximum ratings for the exact orderable device, particularly during power-down or fault conditions when an external signal may remain present.
Use the manufacturer's 8-SOIC land pattern and pin-description table for PCB routing. Place the switch close to the source and destination nodes when signal integrity matters, and keep the common and switched traces away from high-current switching nodes. Provide a low-impedance ground reference and route the control input away from sensitive analog traces. Confirm thermal performance only after final placement because copper and nearby components influence junction temperature.
규정 준수 정보
The DG419 family documentation describes ESD tolerance of 2000 V minimum under Method 3015.7. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations for the exact DG419DY+ orderable device were not identified in the cited source material.