LTC202CJ - Micropower Quad CMOS Analog Switch | Analog Devices
MPN： LTC202CJ ✗ 停產LTC202CJ 概覽
What is an analog switch? An analog switch is an integrated semiconductor switch that routes electrical signals between terminals under digital control. A quad CMOS analog switch contains four switch elements, generally allowing several analog sources to be selected or routed to a common output. The LTC202CJ belongs to the analog-switch hierarchy, which includes multiplexers, demultiplexers, and interface ICs used to connect sensors, converters, test equipment, and other signal-chain circuits.
According to the manufacturer product page and identified datasheet family, key features include micropower operation, low charge injection, low on-resistance, low leakage, guaranteed break-before-make behavior, and a latch-resistant design. These characteristics make the device suitable for precision analog systems where switching transients, signal attenuation, and power consumption can affect measurement quality. The available data also identifies the LTC202 as a quad CMOS analog-switch family; exact electrical limits and temperature-grade details require the manufacturer datasheet.
The CJ package suffix denotes the 16-pin CERDIP package identified in the verified distributor data. Ceramic-DIP construction is commonly used where temperature robustness, mechanical reliability, or legacy industrial and military compatibility matters. The package requires through-hole board layout rather than a surface-mount footprint, so designers should confirm PCB compatibility before substituting or upgrading this part.
Typical applications include precision signal selection, instrumentation multiplexing, test and measurement systems, data-acquisition front ends, sample-and-hold signal paths, and low-power analog control systems. The low charge injection helps reduce switching errors in sampled signals, while the low-leakage characteristic supports preserving small signal levels between selection events.
For new designs, engineers should verify absolute maximum ratings, recommended supply voltages, on-resistance, charge injection, leakage current, switching time, and electrical performance across temperature using the manufacturer datasheet. A footprint-compatible replacement must also preserve the 16-pin CERDIP pinout and the same enable and control logic.
This page summarizes verified distributor and manufacturer information and separates confirmed facts from parameters requiring datasheet review.
直接替換替代品，適用於 LTC202CJ — 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。
此產品無可直接替換的替代品。
申請替代品LTC202CJ 最大額定值與電氣特性
| Product Type | Quad CMOS analog switch |
| Number of Switches | 4 |
| Supply Operation | Single or ±15 V |
| Switch Design | CMOS analog switch |
| Charge Injection | Low charge injection |
| On-Resistance | Low RON |
| Leakage Current | Low leakage |
| Switching Sequence | Guaranteed break-before-make |
| Latch Resistance | Latch-resistant design |
| 封裝 | 16-pin CERDIP |
| Package Type | Ceramic dual in-line package |
| 安裝類型 | Through-hole |
| Application Category | Analog switch, multiplexer, demultiplexer |
| Power Class | Micropower operation |
LTC202CJ ceramic dual in-line package 腳位配置指南
LTC202CJ（ceramic dual in-line package 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： LTC202CJ.
請參閱 資料表 以查看完整腳位配置。
典型應用
LTC202CJ 適用於 7 應用s: Precision Signal Multiplexing, Precision Data Acquisition, Test and Measurement Systems, Sensor Signal Conditioning, Sample-and-Hold Signal Paths, Industrial Analog Control Interfaces, Low-Power Measurement Front Ends.
Precision Signal Multiplexing
The LTC202CJ fits precision signal multiplexing when a system must route several analog inputs into a shared downstream converter or measurement channel. Its quad architecture provides four controlled switch elements, while the verified low-charge-injection and low-leakage characteristics help preserve small signals between selections. The device can be used with single or ±15 V operation according to the family data. Designers should place the switch close to the signal source, keep control traces away from sensitive analog nodes, and confirm that signal amplitudes remain within the manufacturer limits.
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Precision Data Acquisition
The LTC202CJ is appropriate for data-acquisition front ends where a sampled sensor or conditioned analog signal must be connected to a common analog-to-digital path. Micropower operation supports systems where every milliamp of supply demand matters, and low charge injection reduces timing-dependent errors at the switching event. Low leakage is useful when the selected source has a high source impedance. The circuit should include suitable settling time, source-impedance analysis, and input protection before the switch enters the signal chain.
推薦
Test and Measurement Systems
The LTC202CJ can be used in test and measurement equipment to route calibration signals, reference nodes, or instrument channels through a controlled analog path. The ceramic CERDIP package provides a through-hole construction often useful in robust legacy or industrial test fixtures, while the quad switch organization reduces the number of separate routing devices required. The verified family description confirms micropower operation and low leakage, but bandwidth and switching-speed requirements must be checked from the exact datasheet before selecting it for high-frequency instrumentation.
推薦
Sensor Signal Conditioning
The LTC202CJ is suitable for sensor signal conditioning when a low-level analog output must be selected from multiple sources or isolated during a measurement cycle. Low leakage can help preserve high-impedance sensor outputs, while low charge injection reduces the disturbance introduced during switching. Use suitable input filtering and guard techniques around the selected source, and verify that the sensor output does not exceed the absolute maximum and recommended signal ranges. The part is better suited to precision, low-power routing than to unspecified high-bandwidth switching.
推薦
Sample-and-Hold Signal Paths
The LTC202CJ can support sample-and-hold architectures where analog signals are routed before being captured by a downstream sampling circuit. Its low charge injection is useful when the timing of the switching event matters, while guaranteed break-before-make behavior helps prevent two paths from being connected unintentionally. The circuit designer must account for switch on-resistance, source impedance, capacitor settling, and switch leakage. The available verified data does not specify switching time, so high-speed applications require direct confirmation from the manufacturer datasheet.
推薦
Industrial Analog Control Interfaces
The LTC202CJ is suitable for industrial analog-control interfaces where low-power CMOS switching, low leakage, and controlled break-before-make behavior are useful. The through-hole CERDIP package can be advantageous in equipment designed for mechanical robustness and serviceable through-hole assembly. Industrial deployments should still verify the exact operating-temperature range, supply tolerances, isolation strategy, and environmental qualification because those values are not supplied in the verified snippets. Use transient protection and controlled state sequencing around the switch nodes.
推薦
Low-Power Measurement Front Ends
The LTC202CJ can be used in low-power measurement front ends when the design must minimize switching-path power consumption while maintaining low leakage and controlled analog behavior. Micropower operation is especially useful in portable instruments, battery-powered test equipment, and distributed monitoring systems. The four switch elements can organize channel selection without requiring four separate discrete packages, provided the control signals and supply rails meet the exact operating requirements. Validate source settling, capacitor leakage, and ground-return layout in the final prototype.
推薦
推薦產品摘要
工程參考資料，適用於 LTC202CJ — 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 |
|---|---|
| Package | 16-pin CERDIP |
| Brand | Analog Devices |
| Product Type | Quad CMOS analog switch |
| Number of Switches | 4 |
| Supply Operation | Single or ±15 V |
| Charge Injection | Low charge injection; numeric value unavailable |
| On-Resistance | Low RON; numeric value unavailable |
| Leakage | Low leakage; numeric value unavailable |
| Switching Sequence | Guaranteed break-before-make |
| Lifecycle Status | PRODUCTION according to manufacturer page |
主要差異化特點
- Confirmed micropower positioning (對比LTC201A)
- Low-charge-injection signal switching (對比LTC203)
- Guaranteed break-before-make behavior (對比LTC201A)
- Legacy-compatible ceramic through-hole package (對比Surface-mount analog switches)
設計說明
Keep analog switch traces short and place the LTC202CJ close to the signal source or the first receiving buffer. Control inputs should be routed away from sensitive analog nodes to reduce capacitive coupling from switching edges. For high-impedance sources, verify leakage and input capacitance against the actual source impedance and acquisition settling requirements.
The LTC202CJ uses a 16-pin CERDIP package, so the PCB must provide the correct through-hole footprint, pin numbering, and adequate clearance. Do not substitute a surface-mount footprint solely because another analog switch has similar functional specifications. Verify mechanical drawing, pin orientation, and soldering profile against the manufacturer package documentation.
Do not assume that the LTC201A, LTC202, and LTC203 family members are automatically interchangeable. Shared family naming does not prove identical pinout, control polarity, supply range, or electrical limits. Before replacement, compare the manufacturer ordering tables and complete datasheet specifications for the exact package and temperature grade.
合規資訊
The supplied verified data does not state compliance declarations for LTC202CJ. Compliance status must be confirmed with Analog Devices or an authorized distributor.
