DG444CJ+ - 4-Channel SPST Analog Switch | Analog Devices
MPN： DG444CJ+ ✓ 啟用中DG444CJ+ 概覽
An analog switch is a semiconductor device that connects or disconnects signal paths under digital control. The DG444CJ+ belongs to the analog switch hierarchy, where analog switches form part of interface ICs used for routing, sampling, test, measurement, and communication signals. Its quad-channel architecture allows four switches to share one IC while retaining individual control signals, reducing component count compared with four discrete single-channel switches.
The redesigned DG444 family provides low on-resistance matching between switches of 4 ohm maximum and guaranteed on-resistance flatness over the signal range of 9 ohm maximum. These characteristics help minimize channel-to-channel resistance variation and distortion when multiple signals share the same switching network. The 85 ohm maximum on-resistance rating also makes the device suitable for circuits where moderate insertion resistance is acceptable.
Each channel is configured as SPST, normally closed, and the switches conduct equally well in either signal direction. The symmetric behavior makes the DG444CJ+ useful when source and destination may swap roles, provided the designer accounts for the device's power dissipation and off-state isolation. The 16-pin PDIP package also favors through-hole prototyping, inspection, and socket-based assembly rather than compact surface-mount production.
Typical uses include sample-and-hold systems, instrumentation, industrial control, communications equipment, test equipment, and audio or measurement signal routing. The DG444CJ+ is most appropriate when four independently controlled normally closed paths are required and an 85 ohm maximum on-resistance is sufficient for the application. For designs requiring lower resistance, smaller size, faster switching, or a different fault configuration, the system requirements should be checked against other analog-switch families rather than assuming pin compatibility.
When laying out a design, keep sensitive signal paths short and provide adequate bypassing near the supply pins. Check the control-logic truth table, allowed input voltage range, and maximum switch current from the manufacturer datasheet. Because the device dissipates power as (VIN - VOUT) multiplied by current in the conducting state, analyze both channel and package heating at worst-case current. This page combines verified manufacturer and distributor information with pricing, package guidance, replacement analysis, and practical design notes to support component selection and PCB planning.
直接替換替代品，適用於 DG444CJ+ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
DG444DJ+
✅ 直接替換📋 參考替代品（不在目錄中）
DG444CJ+ 最大額定值與電氣特性
| Switch Configuration | 4 × SPST, normally closed |
| Number of Channels | 4 channels |
| Number of Switches | 4 circuits |
| Multiplexer Ratio | 1:1 |
| Maximum On-Resistance | 85 ohm |
| On-Resistance Matching Between Switches | 4 ohm maximum |
| On-Resistance Flatness Over Signal Range | 9 ohm maximum |
| Positive Supply Voltage Range | 10 V to 30 V |
| Dual Supply Voltage Range | ±4.5 V to ±20 V |
| 封裝 | 16-pin PDIP |
| 安裝類型 | Through-hole |
| Signal Direction | Bidirectional conduction |
DG444CJ+ 16-pin pdip 腳位配置指南
DG444CJ+（16-pin pdip 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： DG444CJ+.
請參閱 資料表 以查看完整腳位配置。
典型應用
DG444CJ+ 適用於 6 應用s: Industrial Sensor Signal Routing, Sample-and-Hold Systems, Test and Measurement Equipment, Audio Signal Path Switching, Communication Interface Switching, Data Acquisition and Control Systems.
Industrial Sensor Signal Routing
The DG444CJ+ fits industrial sensor-routing systems that require four independent, normally closed analog paths. Its 85 ohm maximum on-resistance can be acceptable for many sensor and control signals, while the 4 ohm maximum matching between switches helps preserve consistency when different channels carry related measurements. The device supports 10 V to 30 V positive or ±4.5 V to ±20 V dual supplies. Place the IC close to the sensor interface, use short signal traces, and verify the application’s allowable insertion resistance. Because the verified operating temperature range is unavailable, deployments spanning wide industrial temperature ranges require confirmation from the full manufacturer datasheet.
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Sample-and-Hold Systems
The DG444CJ+ can implement four selectable paths in a sample-and-hold or measurement front end where the switch is normally closed and released by an external control signal. The quad SPST architecture reduces the number of separate switch packages, while bidirectional conduction simplifies routing when source and destination roles change. Its on-resistance matching of 4 ohm maximum and flatness of 9 ohm maximum support repeatable behavior across channels. Designers should calculate insertion error from the 85 ohm maximum on-resistance, capacitance, leakage, and the sampling settling time, then confirm those missing dynamic and leakage parameters from the full Analog Devices datasheet.
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Test and Measurement Equipment
The DG444CJ+ is suitable for bench and automated test equipment that routes four measurement or stimulus connections under digital control. Four normally closed SPST channels can select external test points without requiring four separate switch packages. The verified 85 ohm maximum on-resistance is practical for many source-measurement paths, but high-impedance nodes may require additional analysis of leakage and capacitance, neither of which is present in the supplied snippets. Place the switch near the connector or DUT interface to minimize pickup, preserve a grounded return path, and use the manufacturer truth table to prevent unintended simultaneous switching states.
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Audio Signal Path Switching
The DG444CJ+ can route four low-level audio or communication signals when bidirectional, normally closed switching and a moderate 85 ohm maximum on-resistance are acceptable. The four matched switch paths help reduce channel-to-channel resistance variation, which can be important when equalizing or monitoring multiple sources. The device operates from 10 V to 30 V or ±4.5 V to ±20 V, allowing integration with dual-polarity analog systems. For high-impedance audio inputs, verify off-state leakage, distortion, and switching transients from the complete datasheet because those values are not available in the verified search results.
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Communication Interface Switching
The DG444CJ+ can provide controlled routing between four communication or peripheral interface lines when the design can tolerate an 85 ohm maximum on-resistance and the data rate permitted by the unspecified switching-time limits. Its bidirectional SPST behavior supports symmetrical connections, and four channels allow a compact parallel routing arrangement. The verified supply ranges of 10 V to 30 V or ±4.5 V to ±20 V are useful for industrial interface boards. Engineers should verify signal bandwidth, off-state isolation, control-logic levels, and logic thresholds from the manufacturer datasheet before using this device with high-speed links or high-impedance receivers.
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Data Acquisition and Control Systems
The DG444CJ+ is applicable to data-acquisition and industrial control boards that need to connect or isolate several analog channels using a limited number of control signals. Its normally closed configuration provides a defined resting state, while the matched quad channels support repeatable routing behavior. The 16-pin PDIP package simplifies through-hole prototyping and socket-based maintenance. The 85 ohm maximum on-resistance can influence sensor excitation and input scaling, so the complete signal chain must be simulated including source impedance, switch resistance, leakage, and acquisition capacitance. Use short traces, adequate supply bypassing, and a defined control sequence to prevent command overlap.
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推薦產品摘要
工程參考資料，適用於 DG444CJ+ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DG444DJ+ |
|---|---|---|
| Package | 16-pin PDIP | 16-pin PDIP |
| Brand | Analog Devices | Analog Devices |
| Switch Configuration | 4 × SPST, normally closed | 4 × SPST, normally closed |
| Number of Channels | 4 channels | 4 channels |
| Maximum On-Resistance | 85 ohm | 85 ohm |
| On-Resistance Matching | 4 ohm maximum | 4 ohm maximum |
| On-Resistance Flatness | 9 ohm maximum over the signal range | 9 ohm maximum over the signal range |
| Positive Supply Range | 10 V to 30 V | 10 V to 30 V |
| Dual Supply Range | ±4.5 V to ±20 V | ±4.5 V to ±20 V |
主要差異化特點
- Four matched normally closed analog paths in one package (對比DG444DJ+)
- Verified 16-pin PDIP construction (對比DG444DJ+)
- Bidirectional quad SPST routing (對比DG444DJ+)
設計說明
Estimate channel dissipation from the actual conducting-state voltage and current, using P = (VIN − VOUT) × I. The verified maximum on-resistance is 85 ohm, so a conducting channel can also dissipate I²R. The supplied data does not state maximum switch current or package thermal resistance, so obtain both from the manufacturer datasheet before selecting copper area, a socket, or any heat-dissipation strategy.
Place the 16-pin PDIP according to the official manufacturer pin configuration and preserve the pin-1 orientation. Keep switched-signal traces short, use a continuous ground reference, and route control inputs away from sensitive analog paths. Do not infer individual terminal functions from the family description; cross-check the control truth table, common terminals, and supply pins against the official datasheet before drilling the PCB.
A normally closed switch is not interchangeable with a normally open or SPDT device solely because both use a 16-pin package. Verify pin functions, control polarity, supply range, maximum current, leakage, and switching speed for every proposed substitute. Also verify that the 85 ohm maximum on-resistance does not create unacceptable attenuation or settling error in the source and load connected to each channel.
合規資訊
The supplied verified snippets do not contain explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements for DG444CJ+. The device is not an automotive-qualified variant based on the available ordering information.