DG408DY+ - 8-Channel 100Ω CMOS Multiplexer | Analog Devices
部品番号: DG408DY+ ✓ 生産中DG408DY+ 概要
An analog multiplexer is an interface IC that connects multiple input channels to one shared signal path. The DG408 family extends this hierarchy from analog switch to multiplexer, analog interface, and integrated circuit. Its eight independently addressed channels reduce the number of external pins and board-routing requirements when a system must sample or route several sensor, measurement, or test signals through one analog-to-digital converter or processing channel.
Key features include a maximum on-resistance of 100Ω, guaranteed channel matching of 8Ω maximum, and signal-range flatness of 9Ω maximum. These specifications help minimize gain or attenuation differences among channels. The TTL/CMOS-compatible digital control accepts common logic levels, while the monolithic CMOS implementation supports low power dissipation for battery-operated and remote instrumentation systems.
The DG408 architecture uses eight analog switches, a binary decoder, and a common output arrangement. Because it is a single-ended multiplexer, the DG408 routes eight channels to one output; the closely related DG409 provides a differential four-channel arrangement. Channel matching and flatness limits are particularly important when calibration assumes that all eight positions present nearly identical resistance. The 16-SOIC package supports conventional surface-mount PCB assembly.
Typical applications include high-speed data acquisition, audio signal switching and routing, automatic test equipment, avionics, battery-powered instruments, and remote measurement systems. In each case, the multiplexer's low channel variation supports repeatable measurements, while its on-resistance remains suitable for many moderate-impedance sources. Signal bandwidth, input impedance, settling time, and source drive capability must be checked together when establishing an acquisition system's accuracy.
For layout, keep the selected analog path short and route all eight channels consistently to reduce crosstalk and propagation mismatch. Place input protection and conditioning networks close to the mux pins, maintain a continuous ground reference, and avoid long parallel routes beneath noisy digital signals. Use the manufacturer's pin-description table when assigning supply, enable, address, common, and output connections.
This product page combines the manufacturer's DG408 documentation with parameter-level comparison, replacement guidance, and practical PCB design considerations. It is intended to help engineers evaluate channel architecture, logic compatibility, package constraints, and signal-integrity requirements before integrating the DG408DY+ into a new analog routing system.
ドロップイン代替品: DG408DY+ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: DG408DY+ （同一形状・フットプリント） — 相違点: Mounting Type.
DG408DY
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG408DYZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG408
✅ ドロップイン価格はお問い合わせください
データシートを見る →DG408DY
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG408DY-T1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DG408DY+ 仕様
| Multiplexer Configuration | 8:1 |
| Number of Channels | 8 channels |
| On-Resistance | 100 ohm maximum |
| Channel Matching | 8 ohm maximum |
| Flatness Over Signal Range | 9 ohm maximum |
| Switch Architecture | Single 8-channel |
| Technology | Monolithic CMOS |
| Digital Control Compatibility | TTL/CMOS-compatible |
| パッケージ | 16-SOIC |
| 実装タイプ | Surface Mount |
| ピン数 | 16 pins |
| Operating Power Dissipation | Low power dissipation |
| Signal Direction | Single-ended |
| Decode Logic | Binary digital channel selection |
| Voltage Reference | Internal logic-threshold reference |
| Analog Input Count | 8 inputs |
| Common Output Count | 1 output |
| Data Acquisition Suitability | High-speed data acquisition application |
DG408DY+ 16-soic ピン配置ガイド
DG408DY+ (16-soic パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: DG408DY+.
詳細は データシート をご参照ください。
主な用途
DG408DY+ の用途: 6 件s: High-Speed Data Acquisition, Automatic Test Equipment, Audio Signal Switching, Avionics Signal Routing, Battery-Powered Instrumentation, Remote Environmental Monitoring.
High-Speed Data Acquisition
The DG408DY+ is suitable for routing eight single-ended sensor or measurement inputs into one analog-to-digital converter channel. Its 8:1 configuration reduces converter inputs and board wiring, while the 8Ω maximum channel matching and 9Ω maximum flatness help maintain consistent amplitude relationships during calibration. The 100Ω maximum on-resistance must be considered together with source impedance, converter input capacitance, and settling requirements. Use short, consistently routed analog paths and place any input filtering near the selected source to minimize switching transients and channel-to-channel timing variation.
おすすめ
Automatic Test Equipment
The DG408DY+ can route eight test points to a shared measurement channel in automatic test equipment. Its TTL/CMOS-compatible decoder simplifies integration with digital test-control logic, and the monolithic CMOS implementation supports low power dissipation. The guaranteed channel matching of 8Ω maximum helps maintain repeatable path behavior across test positions. For production ATE, verify acquisition settling time, input capacitance, leakage, and switch charge injection against the chosen tester and fixture; those timing and parasitic parameters should be taken from the manufacturer datasheet.
おすすめ
Audio Signal Switching
The DG408DY+ is appropriate for selecting one of eight audio or control signals into a shared processing path. Its 100Ω maximum on-resistance is manageable when the source impedance is much lower, but it forms part of the effective source load and can affect level, bandwidth, and noise performance. The matched channel resistance of 8Ω maximum reduces path-to-path variation. Keep the mux close to the audio amplifier or converter, use a low-impedance driver, and test the complete signal chain because source resistance and downstream loading can amplify the practical insertion loss.
おすすめ
Avionics Signal Routing
The DG408DY+ can select among eight low-bandwidth analog signals in avionics and aerospace measurement systems. Its eight-channel single-ended architecture provides a compact routing solution, while low power dissipation is beneficial in aircraft and remote systems. Channel matching and flatness support consistent measurements across selected inputs. Before qualification, engineers must review the exact suffix for operating temperature and grade, then verify supply voltage, logic thresholds, switching transients, and reliability requirements against the controlled datasheet and the system qualification specification.
おすすめ
Battery-Powered Instrumentation
The DG408DY+ fits portable instruments that must sample several sensors without providing a dedicated converter input for every channel. The monolithic CMOS design is identified for low power dissipation, helping preserve battery life when the eight-channel routing function replaces multiple discrete paths. TTL/CMOS-compatible control allows direct use with common embedded-control logic. Calculate the continuous load and control-state consumption from the manufacturer electrical characteristics, disable unused channels where supported, and account for the 100Ω maximum on-resistance when designing sensor excitation and return paths.
おすすめ
Remote Environmental Monitoring
The DG408DY+ can route outputs from multiple environmental sensors into a shared measurement channel in remote monitoring equipment. Eight single-ended inputs provide a practical compromise between channel count, package size, and signal-path consistency. The 8Ω maximum matching and 9Ω maximum flatness can help preserve calibration consistency when different sensor channels are selected sequentially. Use input protection appropriate to each sensor, keep high-impedance paths short, verify leakage and settling behavior, and include the complete mux loading in the sensor-amplifier design rather than treating the switch as a zero-impedance connection.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: DG408DY+ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | DG408DY | DG408DYZ | DG408 | DG408DY | DG408DY-T1 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Vishay Intertechnology | Vishay Intertechnology |
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Multiplexer Configuration | 8:1 | 8:1 | 8:1 | 8:1 | 8:1 | 8:1 |
| Channel Count | 8 single-ended channels | 8 single-ended channels | 8 single-ended channels | 8 single-ended channels | 8 single-ended channels | 8 single-ended channels |
| Maximum On-Resistance | 100Ω | 100Ω | 100Ω | 100Ω | 100Ω | 100Ω |
| Maximum Channel Matching | 8Ω | 8Ω | 8Ω | 8Ω | 8Ω | 8Ω |
| Maximum Flatness Over Signal Range | 9Ω | 9Ω | 9Ω | 9Ω | 9Ω | 9Ω |
| Digital Logic Compatibility | TTL/CMOS-compatible | TTL/CMOS-compatible | TTL/CMOS-compatible | TTL/CMOS-compatible | TTL/CMOS-compatible | TTL/CMOS-compatible |
| Switch Technology | Monolithic CMOS | Monolithic CMOS | Monolithic CMOS | Monolithic CMOS | Monolithic CMOS | Monolithic CMOS |
| Signal Architecture | Single-ended, one common output | Single-ended, one common output | Single-ended, one common output | Single-ended, one common output | Single-ended, one common output | Single-ended, one common output |
主な差別化要因
- Guaranteed channel resistance matching （vs DG408DYZ)
- Eight single-ended inputs in a standard 16-SOIC footprint （vs Vishay DG408DY)
- Low on-resistance with controlled channel flatness （vs DG408DY-T1)
設計ノート
Treat the 100Ω maximum on-resistance as part of the signal path rather than as an isolated switch parameter. Calculate attenuation with the source impedance, mux resistance, and downstream input impedance. For high-frequency signals, include switch capacitance, input capacitance, and converter acquisition time in the settling analysis. Keep all eight routes similar in geometry so that parasitic loading and propagation differences do not create additional channel-to-channel error.
Place the DG408DY+ close to the analog source and destination components to minimize trace resistance and susceptibility to injected noise. Route the eight input channels consistently and keep the common output path away from clocks, relay contacts, and switching power nodes. Provide a quiet ground reference and place any protection or filtering components where they can be isolated from the shared output path. Check the manufacturer pin-description table for exact address, enable, common, output, supply, and ground assignments.
Do not substitute a differential DG409-style multiplexer for the single-ended DG408DY+ without redesigning the routing and return paths. Likewise, confirm that a replacement's suffix retains the required 16-SOIC pin arrangement, temperature range, grade, and electrical limits. When using a DG408DY, DG408DYZ, or Vishay DG408 candidate, verify the manufacturer's ordering information rather than relying only on the 8:1, 100Ω, and 16-SOIC headline parameters.
コンプライアンス情報
The manufacturer identifies the DG408 family as production. Compliance attributes for the exact DG408DY+ suffix require confirmation from the manufacturer product documentation or material declaration.