DG412CJ+ - 4-Channel SPST Analog Switch | Maxim Integrated
MPN： DG412CJ+ ✓ 啟用中DG412CJ+ 概覽
An analog switch is an interface IC that connects or disconnects a signal path under digital control. The DG412CJ+ belongs to the analog switch family, which sits within interface ICs and broader semiconductor signal-routing systems. Its four SPST channels provide simple on/off selection rather than multiplexing several inputs onto one output. This makes it suitable for bypassing, routing, isolation, and test-fixture applications where the signal must preserve amplitude and waveform integrity.
The verified product information identifies the DG412CJ+ as an improved, quad, SPST analog switch. Maxim describes the DG411, DG412, and DG413 family as featuring low on-resistance matching between switches, with a maximum matching value of 3 Ω, and guaranteed on-resistance flatness over the signal range, with a maximum flatness difference of 4 Ω. These characteristics help reduce channel-to-channel variation and signal amplitude errors in precision analog paths. The manufacturer product page also lists a 1ku list-price starting point of $3.68.
The CJ+ ordering code uses the manufacturer’s 16-pin PDIP package, making it appropriate for through-hole prototyping, educational platforms, and legacy or industrial assemblies where a socketed DIP footprint is preferred. The four control inputs are intended for digital control, while the switched terminals carry analog signals. The design must still be checked against the complete datasheet for absolute maximum ratings, switch configuration, control logic, charge injection, off leakage, and operating limits.
Typical uses include selecting one of several sensor outputs, isolating instrumentation inputs, controlling analog test paths, routing audio or communication signals, and implementing sample-and-hold or measurement front ends. Because the device is a physical switch rather than an active amplifier, system performance depends on source impedance, signal amplitude, control timing, parasitic capacitance, and PCB leakage. Use a ground plane, short analog traces, and an appropriate bypass strategy when integrating it into a mixed-signal board.
The DG412CJ+ is a sensible choice when four independent SPST paths, a DIP package, and low matched on-resistance are required. For a new compact design, a surface-mount equivalent may simplify assembly; for a different multiplexing architecture, a mux or demux device should be considered instead. This page combines the verified manufacturer and distributor information with practical selection, application, and design guidance.
直接替換替代品，適用於 DG412CJ+ — 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： DG412CJ+ （相同外形與佔位） — 差異在於 Mounting Type, Package, Switch Configuration, Number of Channels, On-Resistance Flatness.
DG412DJZ
✅ 直接替換📋 參考替代品（不在目錄中）
DG412CJ
✅ 直接替換📋 參考替代品（不在目錄中）
DG411CJ+
✅ 直接替換聯絡詢價
查看資料表 →DG413CJ+
✅ 直接替換聯絡詢價
查看資料表 →ADG412TQ
✅ 直接替換📋 參考替代品（不在目錄中）
DG412CJ+ 最大額定值與電氣特性
| Number of Channels | 4 |
| Switch Configuration | 4 x SPST |
| On-Resistance | 45 Ω maximum |
| On-Resistance Matching | 3 Ω maximum |
| On-Resistance Flatness | Δ4 Ω maximum |
| 封裝 | 16-pin PDIP |
| 安裝類型 | Through-hole |
| Device Type | Analog switch IC |
| Product Family | DG411/DG412/DG413 |
| Technology | Monolithic CMOS analog switch |
| Signal Path | Independently selectable SPST |
| Control Interface | Digital control inputs |
| Supplier Price Starting Point | $3.68 at 1ku |
DG412CJ+ 16-pin pdip 腳位配置指南
DG412CJ+（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： DG412CJ+.
請參閱 資料表 以查看完整腳位配置。
典型應用
DG412CJ+ 適用於 6 應用s: Sensor Signal Routing, Automated Test Fixture, Analog Signal Bypass, Communication Signal Isolation, Precision Measurement Front End, Industrial Control Signal Routing.
Sensor Signal Routing
The DG412CJ+ fits sensor-selection and isolation circuits that require four independently controlled SPST paths. Its verified 45 Ω maximum on-resistance is low enough to use in many low-frequency measurement systems when it is included in the source-impedance calculation, while the 3 Ω maximum matching and Δ4 Ω maximum flatness specifications help reduce differences between selected channels. In a multi-sensor front end, each control signal can connect or disconnect one sensor path while the others remain isolated. The principal design check is the complete datasheet’s control polarity, leakage, charge injection, and supply requirements. For high-impedance sensors, board cleanliness and guarding become especially important because leakage and injected charge can create errors smaller than the switch resistance.
推薦
Automated Test Fixture
The DG412CJ+ is useful in automated test fixtures where four analog test paths must be switched under digital control. A controller can select a DUT node, instrumentation input, reference, or bypass path without changing the mechanical fixture. The four SPST channels provide straightforward isolation, and the matched on-resistance specifications can reduce channel-to-channel gain variation when the test system uses low source impedances. Because the 45 Ω maximum on-resistance adds to the effective source impedance, sensitive measurements should include it in the error budget. Switching transients and control timing must also be checked against the datasheet, especially when the fixture handles high-bandwidth waveforms or high-level signals.
推薦
Analog Signal Bypass
The DG412CJ+ can implement four independent bypass paths in audio, control, or instrumentation circuitry. Each SPST switch can insert or remove a component, provide a direct path, or isolate a section of a board during calibration. This architecture is straightforward because the device requires only four digital control signals and no multiplexing address logic. The verified 45 Ω maximum on-resistance should be considered in signal-integrity calculations, particularly for low-amplitude or high-impedance stages. Keep routing short and provide a nearby return path to minimize coupling. The final design must verify the switch’s off-isolation, on-state attenuation, control timing, and absolute maximum signal limits from the manufacturer datasheet.
推薦
Communication Signal Isolation
The DG412CJ+ is appropriate for low-frequency communication-board routing where four channels must be isolated, connected, or cross-connected under logic control. Its four independent SPST paths allow transmit, receive, test, and auxiliary lines to share a common routing structure. The 45 Ω maximum on-resistance can influence line amplitude and termination, while the specified matching and flatness can help maintain consistency across channels. Layout quality remains critical: route the switched signal and its return path together, use a solid ground plane, and avoid long traces adjacent to noisy switching nodes. Verify bandwidth, charge injection, off leakage, and power-supply limits against the full datasheet before using the switch at high data rates.
推薦
Precision Measurement Front End
The DG412CJ+ can support precision measurement front ends by switching between sensors, reference paths, and calibration networks. The device’s verified low on-resistance matching of 3 Ω maximum and flatness of Δ4 Ω maximum help limit channel-dependent errors when multiple paths are compared. The 45 Ω maximum on-resistance must still be combined with source resistance and input bias current to estimate measurement error. For high-impedance instrumentation, use guarding, clean boards, and short leakage-sensitive traces; for fast measurements, account for switching time and charge injection from the datasheet. The DG412CJ+ is most appropriate when independent SPST selection is required rather than multiplexed addressing.
推薦
Industrial Control Signal Routing
The DG412CJ+ can route low-frequency analog command or feedback signals in industrial control equipment when four independent switching paths are needed. The 16-pin PDIP package supports through-hole construction and is convenient for legacy control boards, prototype fixtures, and hand-assembled systems. Digital control inputs can connect external commands to a controller, isolate a faulted channel, or select test feedback. Designers should ensure that the analog signal remains within the device’s verified absolute maximum limits and that the 45 Ω maximum on-resistance does not distort the control loop. Provide local bypassing, maintain short return paths, and isolate the switch from electrically noisy motor or relay stages. Supply-voltage and temperature limits require confirmation in the official datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 DG412CJ+ — 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 | DG412DJZ | DG412CJ | DG411CJ+ | DG413CJ+ | ADG412TQ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices |
| Package | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 | TQFP-16 |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
主要差異化特點
- Four independently controlled SPST paths (對比DG411CJ+)
- Low channel-to-channel resistance matching (對比ADG412TQ)
- Guaranteed on-resistance flatness (對比ADG412TQ)
- Through-hole DIP integration (對比DG412CUE+)
設計說明
Include the verified 45 Ω maximum on-resistance in the complete signal-path impedance budget. For a resistive source and load, the switch contributes attenuation in addition to the amplifier, wiring, and protection networks. Use the manufacturer’s 3 Ω maximum matching and Δ4 Ω maximum flatness figures when evaluating channel-to-channel gain errors. For high-impedance nodes, leakage and injected charge may dominate the error, so verify those specifications and use guarding and short traces.
Route each switched signal together with its reference or return path, minimize loop area, and place the DG412CJ+ close to the source and destination circuitry. Avoid placing sensitive analog traces beneath digital control nets or adjacent to switching regulators. In a mixed-signal PCB, use a continuous ground plane and keep the through-hole DIP footprint free of unintended thermal or electrical coupling. Confirm every pin name against the official DG412 datasheet before fabrication.
Do not assume that every DG411, DG412, DG413, or ADG412 ordering code is a drop-in substitute merely because it uses four switches. The switch topology, control polarity, pin assignments, and electrical limits can differ between families and packages. In particular, ADG412TQ is a TQFP-16 candidate rather than the verified PDIP-16 package of DG412CJ+. A valid substitution requires a package-compatible footprint, matching pinout, compatible control logic, and acceptable electrical performance.
合規資訊
The supplied verified snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance values remain unknown rather than inferred.