DG202CJ+ - Quad SPST 200Ω Analog Switch | Analog Devices
料号： DG202CJ+ ✓ 量产中DG202CJ+ 概述
An analog switch is an integrated semiconductor device that connects or isolates circuit nodes under digital control. A single-pole single-throw, or SPST, switch provides one signal path that is normally open until its control input commands closure. The DG202CJ+ belongs to the analog-switch hierarchy, where CMOS construction supports low-power operation, bidirectional signal passage, and operation across both positive and negative supply rails.
The four independently controlled channels provide 4:1 routing capability in a single package. Each channel has a specified 200 ohm on-resistance, while the normally open configuration prevents signal flow while deasserted. Break-before-make behavior helps avoid connecting two driven sources simultaneously during transitions. The DG202 family uses the Intersil 44 V CMOS process, and its latch-proof construction helps prevent unwanted operation when supplies are disconnected while signals remain present.
The DG202CJ+ supports dual supplies from ±4.5 V to ±18 V. Published family information identifies maximum turn-on time of 600 ns and maximum turn-off time of 450 ns. The family can block signals up to 30 V peak-to-peak in the OFF state, making it useful where signals can exceed the nominal supply range. The DIP-16 package supports conventional through-hole assembly and straightforward laboratory prototyping.
Typical uses include multiplexed data acquisition, sensor selection, test-point routing, signal isolation, sample-and-hold subsystems, and communication interface switching. The four independent channels are particularly useful when several analog sources must share a downstream amplifier, converter, or measurement instrument without constructing separate discrete switch networks.
Designers should verify signal amplitude, supply sequencing, control-logic levels, off-state leakage, and on-resistance error against the manufacturer datasheet. Logic-high and logic-low levels must remain compatible with the selected supply condition, and unused control or signal pins should be handled exactly as specified in the datasheet.
This page combines verified manufacturer and distributor information with a focused engineering comparison, drop-in sourcing assessment, and practical design guidance. It distinguishes true package-compatible replacements from related DG202 package variants that cannot be substituted without changing the PCB footprint.
直接替换替代料： DG202CJ+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
DG202CJ
✅ 直接替换📋 参考替代料（不在目录中）
DG202CJ
✅ 直接替换📋 参考替代料（不在目录中）
DG202CJ+ 最大额定值与电气特性
| Number of Switch Circuits | 4 circuits |
| Switch Configuration | 4 × SPST, normally open |
| On-Resistance | 200 ohm |
| Positive Supply Range | +4.5 V to +18 V |
| Negative Supply Range | -18 V to -4.5 V |
| Control Inputs | 4 inverted control inputs |
| Maximum Turn-On Time | 600 ns |
| Maximum Turn-Off Time | 450 ns |
| OFF-State Signal Blocking | 30 V peak-to-peak |
| Signal Path | Bidirectional |
| Switching Behavior | Break-before-make |
| Process Technology | 44 V CMOS |
| Latch Protection | Latch-proof |
| 封装 | 16-pin PDIP |
| 安装类型 | Through-hole |
DG202CJ+ 16-pin pdip 引脚配置指南
DG202CJ+（16-pin pdip 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： DG202CJ+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DG202CJ+ 适用于 6 应用s: Multiplexed Analog Data Acquisition, Sensor Signal Selection, Test-Point and Signal Isolation, Sample-and-Hold Signal Routing, Communication Interface Switching, Industrial Control Signal Isolation.
Multiplexed Analog Data Acquisition
The DG202CJ+ fits multiplexed analog data-acquisition systems because it provides four normally open, bidirectional channels in one 16-pin PDIP package. Each channel has a specified 200 ohm on-resistance and family switching times of 600 ns maximum turn-on and 450 ns maximum turn-off. Place the switch between multiplexed sensor or test inputs and a shared ADC front end to reduce the number of external signal paths. Because every enabled channel adds its on-resistance and leakage contribution to the acquisition error budget, verify source impedance, ADC input capacitance, settling time, and off-state leakage against the application limits.
推荐
Sensor Signal Selection
DG202CJ+ can route several low- to moderate-impedance sensor outputs into a shared amplifier or converter through four independently controlled channels. Its normally open SPST configuration keeps unselected paths disconnected, while bidirectional operation permits either signal direction. The 200 ohm on-resistance may be acceptable for many high-impedance sensors, but it can create gain error when paired with lower source impedances. Control polarity must also be handled correctly because the DG202 uses inverted inputs. For bridge, thermocouple, or precision resistive sensors, calculate the complete error chain and confirm leakage and off-state behavior before finalizing the channel architecture.
推荐
Test-Point and Signal Isolation
The four SPST channels of DG202CJ+ are suitable for test-point routing, where a fixture must connect or isolate one of several circuit nodes without permanently joining driven sources. Break-before-make operation helps prevent momentary overlap between switched paths, and normally open contacts provide a defined disconnected state. The 16-pin PDIP package is straightforward for laboratory fixture construction and through-hole prototyping. Keep the switched signal below the family’s published 30 V peak-to-peak OFF-state blocking range unless a different device is selected, and account for the 200 ohm path resistance when defining continuity-test tolerances.
推荐
Sample-and-Hold Signal Routing
DG202CJ+ can select which source reaches a sampling or hold stage through four normally open analog paths. Its maximum turn-on time of 600 ns and turn-off time of 450 ns provide concrete timing limits for control sequencing. Because the switch resistance contributes directly to source loading and capacitor charging, the selected sampling capacitor, source impedance, and acquisition interval must be evaluated together. The latch-proof family behavior is also useful in systems where supply interruption or reordering could otherwise produce unexpected signal paths. Use the datasheet switching-time and charge-injection curves for the final timing budget.
推荐
Communication Interface Switching
The DG202CJ+ supports bidirectional routing of low-frequency communication or control signals across four normally open channels. Dual supplies from ±4.5 V to ±18 V allow operation with bipolar interface levels when the surrounding circuitry uses compatible amplitudes. The 200 ohm on-resistance is suitable for many control, status, and low-speed data paths, but it can attenuate high-impedance receivers and should be included in termination calculations. The inverted controls simplify some active-low interface arrangements but require careful mapping from firmware states to physical channel states. Verify logic thresholds, signal swing, leakage, and maximum off-state signal amplitude before deployment.
推荐
Industrial Control Signal Isolation
DG202CJ+ can isolate multiple control lines or analog nodes in industrial equipment where independent routing and default-open behavior are useful. Its normally open SPST channels prevent unintended path closure, while the latch-proof construction helps manage supply-loss conditions that leave field-side signals present. The four channels permit one device to handle multiple isolated routes, and the PDIP-16 package supports through-hole assembly into prototype or legacy-style control boards. Designers must ensure that external voltages remain within the applicable off-state blocking limits, provide suitable protection for industrial transients, and choose control-logic levels that remain unambiguous over the complete supply range.
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推荐产品汇总
工程参考数据： DG202CJ+ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | DG202CJ | DG202CJ |
|---|---|---|---|
| Package | PDIP-16 | PDIP-16 - same | PDIP-16 - same |
| Brand | Analog Devices | Analog Devices | Vishay Intertechnology |
| Number of Circuits | 4 | 4 | 4 |
| Switch Configuration | 4 × SPST, normally open | 4 × SPST, normally open | 4 × SPST, normally open |
| On-Resistance | 200 ohm | 200 ohm | 200 ohm |
| Supply Voltage Range | ±4.5 V to ±18 V | ±4.5 V to ±18 V | ±4.5 V to ±18 V |
| Control Input Polarity | Inverted | Inverted | Inverted |
| Maximum Turn-On Time | 600 ns | 600 ns | 600 ns |
| Maximum Turn-Off Time | 450 ns | 450 ns | 450 ns |
关键差异点
- Four-channel routing in one through-hole package （对比 Single-channel analog switches)
- Bidirectional operation from one SPST switch （对比 Unidirectional discrete analog switches)
- Wide bipolar supply operating range （对比 Single-supply-only switch families)
- Default-open switch state with inverted control （对比 Normally closed or non-inverted-control variants)
设计说明
Do not confuse a package match with full functional equivalence. The verified DG202AK comparison identifies a 16-pin CDIP package, while DG202BDY is listed as 16-SOIC; neither is a direct no-PCB-change substitute for the 16-pin PDIP DG202CJ+. Also distinguish the DG202 inverted controls from the DG201 non-inverted controls. Validate control polarity, supply range, and package dimensions before releasing a substitute to production.
Include the specified 200 ohm on-resistance when calculating insertion loss and source-loading error. For a simple resistive divider interpretation, the switch resistance combines with the source and receiver impedances, so the resulting ratio may differ materially from the open-circuit voltage. Use the complete switch equivalent circuit and the datasheet off-state leakage when designing high-impedance or precision measurement paths.
Use the DG202CJ+ within its documented dual-supply range of ±4.5 V to ±18 V, including any unequal-rail application only where the manufacturer permits it. Because control thresholds and switch behavior can vary with supply voltage, select the supply condition first and then verify the valid logic-high and logic-low levels. Do not infer control compatibility from 5 V CMOS logic without checking the datasheet thresholds and absolute maximum ratings.
For a high-frequency or precision layout, keep switch traces short, provide a stable return plane, and place any required bypass capacitors close to the supply pins. Preserve symmetry between paired signal paths to reduce parasitic mismatch, and route control traces away from sensitive analog inputs. The verified data does not specify a recommended PCB layout or application-note land pattern, so use the manufacturer package drawing and schematic guidance.
合规信息
The supplied manufacturer and distributor snippets do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable to this general-purpose analog switch.
