DG401DJ+ - Dual 45Ω High-Speed SPST Switch | Analog Devices
MPN： DG401DJ+ ✓ 啟用中DG401DJ+ 概覽
An analog switch is an interface IC that connects or isolates an analog signal without amplifying its voltage. The DG401 family belongs to the broader switch hierarchy that includes analog switches, multiplexers, and digital multiplexers. Its CMOS implementation provides low power consumption, while the high-speed switching characteristics make it useful in test equipment, sample-and-hold circuits, data acquisition systems, and precision signal routing.
Key features include two SPST, normally open switch circuits, a 1:1 signal configuration, on-resistance below 45 Ω, turn-on time below 150 ns, and a maximum supply rating of 44 V. The control inputs accept TTL-compatible or CMOS-compatible logic. Low charge injection reduces the unwanted voltage pulse that can disturb a sampled signal when the switch changes state.
The switch supports analog signals spanning up to 15 V while operating from a single supply. Its low on-resistance minimizes insertion loss and voltage drop in signal paths, while low leakage helps preserve the output when a channel is disconnected. The internal architecture is designed for low-power operation, which supports portable instrumentation and battery-powered test systems.
Typical uses include high-speed signal routing, multiplexed measurement systems, sample-and-hold circuits, industrial control interfaces, and laboratory or communication equipment. The dual independent configuration allows two separate signals to be controlled with one device, reducing component count when board space is constrained.
PCB design should keep analog traces short and provide a ground return close to the device. Control inputs must remain within their rated logic levels, and unused control or signal pins should be connected according to the manufacturer datasheet. Review voltage limits carefully because the 44 V maximum supply rating does not imply that all 15 V analog signals are safe under every operating condition.
This page combines the manufacturer's core switch characteristics, package and electrical details, practical routing guidance, application fit, and a structured comparison with qualified same-footprint alternatives to support faster component selection.
直接替換替代品，適用於 DG401DJ+ — 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。
此系列的變體
與下列產品可直接替換的同系列型號： DG401DJ+ （相同外形與佔位） — 差異在於 Charge Injection, Mounting Type, Package.
MAX301CPE+
✅ 直接替換📋 參考替代品（不在目錄中）
DG401DJ
✅ 直接替換📋 參考替代品（不在目錄中）
DG401DJ
✅ 直接替換📋 參考替代品（不在目錄中）
DG401DJ
✅ 直接替換📋 參考替代品（不在目錄中）
DG401DJ
✅ 直接替換📋 參考替代品（不在目錄中）
DG401DJ+ 最大額定值與電氣特性
| Number of Switch Circuits | 2 circuits |
| Switch Configuration | 1:1 SPST, normally open |
| On-Resistance | 45 Ω maximum |
| Maximum Supply Voltage | 44 V |
| Analog Signal Range | 15 V |
| Turn-On Time | 150 ns maximum |
| Off Leakage Current | 40 pA |
| Power Consumption | Milliwatt-level |
| Logic Compatibility | TTL and CMOS compatible |
| Supply Capability | Single supply |
| Technology | Monolithic CMOS |
| 封裝 | 16-pin PDIP |
| 腳位數 | 16 pins |
| 安裝類型 | Through-hole |
| Temperature Grade | Industrial |
| Charge Injection | Low |
DG401DJ+ 16-pin pdip 腳位配置指南
DG401DJ+（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： DG401DJ+.
請參閱 資料表 以查看完整腳位配置。
典型應用
DG401DJ+ 適用於 6 應用s: High-Speed Signal Routing, Sample-and-Hold Acquisition, Automated Test Equipment, Industrial Measurement Interface, Battery-Powered Data Acquisition, Communication Signal Isolation.
High-Speed Signal Routing
The DG401DJ+ is appropriate for high-speed signal routing because each of its two normally open SPST channels has a listed on-resistance of 45 Ω maximum and turn-on time below 150 ns. Place the switch close to the signal source to minimize PCB trace resistance and capacitance that would otherwise degrade edge response. TTL- and CMOS-compatible control inputs simplify interfacing with digital control logic. For high-speed or wideband signals, verify bandwidth, off isolation, capacitance, and charge injection under the actual source and load conditions, because switching time alone does not define total signal fidelity.
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Sample-and-Hold Acquisition
The DG401DJ+ can form the routing element in a sample-and-hold acquisition path by connecting the measured input to the sampling network when its control signal is asserted. Its low charge injection is valuable because the control transition produces less unwanted disturbance at the held capacitor, while 40 pA off leakage limits the amount of signal lost while a channel is open. The 15 V analog signal range supports many laboratory and industrial inputs. Validate capacitor selection, acquisition time, settling behavior, dielectric absorption, and switch capacitance because the published 150 ns turn-on figure does not by itself guarantee a complete acquisition time.
推薦
Automated Test Equipment
The DG401DJ+ suits automated test equipment that must connect test signals quickly and disconnect them accurately between measurements. Two independent SPST paths allow one device to control separate resources, reducing the number of routing components on a measurement board. Its turn-on time below 150 ns supports rapid sequencing, and the 45 Ω maximum on-resistance limits the voltage drop across the switch at moderate current. The instrument designer should still budget for switch capacitance, leakage, charge injection, relay-style settling requirements, and the control-signal return path to achieve repeatable measurements at the required accuracy.
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Industrial Measurement Interface
The DG401DJ+ is useful as an industrial measurement interface between a controller and externally connected analog signals. Its normally open configuration provides isolation between disconnected channels, while TTL- and CMOS-compatible control inputs permit operation across common logic systems. The monolithic CMOS implementation consumes milliwatt-level power, helping preserve the low-power character of portable or distributed instrumentation. Engineers should confirm that the 15 V analog signal range covers normal operating and fault conditions, that the 44 V supply maximum is never exceeded, and that protection components do not inject unacceptable leakage into sensitive measurements.
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Battery-Powered Data Acquisition
The DG401DJ+ fits low-power data-acquisition front ends that need fast multiplexing without a continuously powered resistive divider in every channel. The two-channel SPST arrangement permits resource sharing between instruments or sensor inputs, and the low-power CMOS design supports milliwatt-level operation. Its 45 Ω maximum on-resistance is modest for many sensor and low-frequency measurement paths, while 40 pA off leakage helps preserve high-impedance node voltages. Confirm leakage over temperature, account for switch capacitance in the filter design, and select control signaling that remains valid at the minimum supply voltage used by the portable instrument.
推薦
Communication Signal Isolation
The DG401DJ+ can isolate communication-related analog paths by disconnecting inactive branches with its normally open SPST channels. The 45 Ω maximum on-resistance limits insertion loss in the connected state, while turn-on time below 150 ns permits prompt channel selection. Low off leakage reduces unintended coupling through an open switch, although overall channel isolation depends on capacitance, layout, frequency, and the surrounding circuit. Use short traces, maintain a continuous ground reference, and check that control-signal transitions cannot capacitively disturb the protected signal path. For high-frequency communication links, verify the complete frequency-domain isolation specification before deployment.
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推薦產品摘要
工程參考資料，適用於 DG401DJ+ — 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 | MAX301CPE+ | DG401DJ | DG401DJ | DG401DJ | DG401DJ |
|---|---|---|---|---|---|---|
| Package | 16-pin PDIP | 16-pin PDIP | 16-pin PDIP | 16-pin PDIP | 16-pin PDIP | 16-pin PDIP |
| Brand | Analog Devices | Maxim Integrated | Vishay Intertechnology | Vishay Intertechnology | Temic | Silicon Labs |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 | 2 |
| Switch Configuration | Dual SPST, normally open | Dual SPST | Dual SPST | Dual SPST | Dual SPST | Dual SPST |
| Turn-On Time | 150 ns maximum | 150 ns maximum | 150 ns maximum | 150 ns maximum | 150 ns maximum | 150 ns maximum |
主要差異化特點
- Documented 45 Ω maximum on-resistance (對比MAX301CPE+)
- Turn-on time below 150 ns (對比MAX301CPE+)
- Published 40 pA off-leakage value (對比MAX301CPE+)
- Dual normally open SPST configuration (對比DG401CJ+)
設計說明
Treat the 45 Ω maximum on-resistance as only one part of the signal-path design. Keep analog traces short, minimize stub branches, and provide a continuous ground reference near the DIP package. For high-speed or high-impedance signals, include switch capacitance, leakage, off isolation, and charge injection in the timing and noise budget rather than relying only on the 150 ns maximum turn-on specification.
The DG401DJ+ supports single-supply operation and accepts TTL- or CMOS-compatible control signals. Confirm that control thresholds remain valid at the minimum operating supply and across temperature. Never treat the 44 V maximum supply rating as a recommended operating point, and apply the stated 15 V analog signal range only after checking absolute-maximum and system fault conditions.
Use the manufacturer datasheet pin-description table to assign every one of the 16 PDIP terminals and maintain the package's standard through-hole footprint. Connect control inputs so that deassertion leaves the channels in the required normally open state. Route control and analog conductors to limit capacitive coupling, and use the application diagram in the manufacturer datasheet as the baseline when adding external protection or filtering.
A matching PDIP outline does not prove that a substitute is pin-to-pin compatible. Before replacing DG401DJ+, compare terminal names, common connections, control polarity, logic thresholds, supply limits, analog signal range, on-resistance, timing, leakage, and temperature grade. Also check manufacturer-specific ordering suffixes and markings because the same base MPN can be offered by more than one manufacturer.
合規資訊
The DG401DJ+ is listed in the industrial temperature grade. No explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was confirmed, so these attributes remain unknown pending current manufacturer documentation.