MAX350EWN+ - Dual 4:1 Serial Multiplexer | Analog Devices
MPN： MAX350EWN+ ✓ 啟用中MAX350EWN+ 概覽
An analog multiplexer is a semiconductor that connects one signal path to one of several channels through controlled switches. The MAX350 family extends this category to the hierarchy of analog switch, multiplexer, routing IC, and signal-management semiconductor. Its 4:1 dual configuration provides two separately selectable channel groups, making it suitable for channel-scanning systems where multiple sensors, measurement inputs, or controlled outputs share a common signal chain.
Key features include serial control, bidirectional signal conduction, low-voltage CMOS operation, and tightly matched switch resistance. The 100 ohm maximum on-resistance limits signal attenuation, while the 16 ohm maximum channel-to-channel match improves consistency when comparing readings across different channels. Its 18-pin wide SOIC package also provides a practical surface-mount footprint for industrial and instrumentation designs.
The device uses a serial interface to select channels and control the multiplexers, reducing the number of package pins needed compared with a parallel-control multiplexer. This architecture is valuable in systems that route several slow or moderate-bandwidth analog signals, particularly when the microcontroller has limited general-purpose input/output capacity.
Typical applications include multimeter and laboratory input switching, automated test equipment, data-acquisition modules, sensor-channel multiplexing, and control of multiple analog signal paths. The MAX350EWN+ is appropriate when bidirectional analog routing and matched resistance are more important than ultra-low on-resistance or high-speed video multiplexing.
When laying out the circuit, keep analog traces short and connect the device to a stable low-noise supply. Confirm the serial interface levels and logic thresholds against the system controller, and verify that every switched signal remains within the specified analog input range. Check the full on-resistance and off-isolation characteristics in the manufacturer datasheet when the signal source is high impedance.
直接替換替代品，適用於 MAX350EWN+ — 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。
MAX350CWN+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX350EWN+ 規格
| Configuration | Dual 4:1 multiplexer, 2 circuits |
| Control Interface | Serial |
| 工作電源電壓 | 2.7 V to 16 V |
| Maximum On-Resistance | 100 ohm |
| Channel-to-Channel Ron Matching | 16 ohm maximum |
| On-Resistance Variation Over Signal Range | 10 ohm maximum |
| Signal Conduction Direction | Bidirectional |
| Process Technology | CMOS |
| Number of Channels | 8 channels as two 4-channel banks |
| Number of Circuits | 2 circuits |
| 封裝 | 18-pin wide SOIC (WSOIC-18) |
| 安裝類型 | Surface mount |
| RoHS 狀態 | Compliant |
MAX350EWN+ 18-pin wide soic (wsoic-18) 腳位配置指南
MAX350EWN+（18-pin wide soic (wsoic-18) 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： MAX350EWN+.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX350EWN+ 適用於 6 應用s: Automated Test Equipment Signal Routing, Data Acquisition and Sensor Channel Multiplexing, Multimeter and Laboratory Input Switching, Industrial Control Signal Multiplexing, Battery-Powered Sensor and Control Interface, Programmable Signal Conditioning and Routing.
Automated Test Equipment Signal Routing
The MAX350EWN+ fits automated test equipment that connects one measurement path to several DUT terminals. Its two independent 4:1 banks can route paired test signals without consuming a separate parallel-control mux for every channel, while the 100 ohm maximum on-resistance limits attenuation on moderate-impedance sources. The manufacturer-specified 16 ohm maximum channel-to-channel matching improves comparison consistency between test points. Because the device is bidirectional, the same routing structure can support source injection, response capture, and stimulus-return paths. Confirm bandwidth, leakage, and off-isolation requirements for the highest-impedance or fastest nodes before finalizing the matrix.
推薦
Data Acquisition and Sensor Channel Multiplexing
The MAX350EWN+ is suitable for data-acquisition boards that scan several analog sensors through a shared converter input. Its 8-channel arrangement, implemented as two 4:1 banks, reduces the number of physical connections reaching the controller while preserving separate group selection over the serial interface. The 16 ohm maximum channel-to-channel resistance matching helps minimize gain-like errors caused by channel-dependent loading. For high-impedance sensors, include the mux input capacitance and leakage in the settling-time analysis. Add a high-impedance buffer after the mux when the source impedance is high or the required sample rate is high.
推薦
Multimeter and Laboratory Input Switching
The MAX350EWN+ can connect several measurement inputs to a shared instrument front end in a programmable multimeter or laboratory switch system. Its bidirectional operation permits either measurement-source routing or controlled drive into a test point, and its dual 4:1 organization allows two switched groups to share the same control logic. The 100 ohm maximum on-resistance may require input-buffer compensation when driving high-impedance measurement circuits. Keep the analog path compact, use a single low-noise ground reference, and verify the complete error budget including channel matching, leakage, and switch capacitance.
推薦
Industrial Control Signal Multiplexing
The MAX350EWN+ suits industrial control boards that must connect several analog command or feedback points to a central controller. The serial control interface reduces parallel routing and connector count, while the 2.7 V to 16 V supply range supports low-voltage control systems. Its bidirectional conduction allows a controller to monitor an input or place a conditioned output onto the selected line. Protection, filtering, and isolation requirements may differ from the core switch specifications, so validate those external networks against the operating voltages and leakage limits in the MAX350 data sheet. The manufacturer lists the MAX350 family as production, supporting long-life industrial design-in activity.
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Battery-Powered Sensor and Control Interface
The MAX350EWN+ can consolidate analog routing in a compact battery-powered sensor node, particularly where several low-bandwidth signals must be sampled through one interface. Its 18-pin wide SOIC footprint supports surface-mount assembly, and the low-voltage CMOS operation suits 2.7 V and higher systems. The 100 ohm maximum on-resistance is acceptable for many moderate-impedance sensors but can form a meaningful divider with a high-impedance source. Use a buffer when the sensor output impedance is high, and account for switch leakage when resolving microampere-level signals. Serial control also allows the host processor to keep the mux in a selected state between conversions.
推薦
Programmable Signal Conditioning and Routing
The MAX350EWN+ fits programmable signal-conditioning systems where analog nodes must be reconfigured over a serial bus. Two 4:1 banks provide a practical balance between routing flexibility and control overhead, and bidirectional signal conduction simplifies feedback or bidirectional transducer arrangements. The 16 ohm maximum channel-to-channel matching supports repeatable routing when the controller changes the selected channel. Place decoupling close to the supply pins, route the serial control signals away from sensitive analog traces, and use a ground plane that avoids long return-current loops under the analog switches. Evaluate the series resistance with the selected source and load impedances before assuming signal integrity is acceptable.
推薦
推薦產品摘要
工程參考資料，適用於 MAX350EWN+ — 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 | MAX350CWN+ |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 18-SOIC (WSOIC-18) | 18-SOIC (WSOIC-18) |
| Configuration | Dual 4:1 multiplexer, 2 circuits | Dual 4:1 multiplexer, 2 circuits |
| Control Interface | Serial | Serial |
| Maximum On-Resistance | 100 ohm | 100 ohm maximum |
| Channel-to-Channel Ron Matching | 16 ohm maximum | 16 ohm maximum |
| Ron Variation Over Signal Range | 10 ohm maximum | 10 ohm maximum |
| Signal Conduction Direction | Bidirectional | Bidirectional |
| Process Technology | CMOS | CMOS |
| Number of Switched Signal Paths | 8 across two 4-channel banks | 8 across two 4-channel banks |
| RoHS Status | Compliant | Compliant |
主要差異化特點
- Dual 4:1 routing with serial control in an 18-pin wide SOIC (對比MAX350CWN+)
- Matched switch resistance for repeatable channel selection (對比MAX350CWN+)
- Bidirectional analog conduction in a compact surface-mount package (對比MAX4053AESE)
設計說明
Treat the MAX350EWN+ as an impedance element in the complete signal path. With a 100 ohm maximum on-resistance, a high-impedance source can experience meaningful attenuation, and switch capacitance can add settling time between channel selections. Place the mux close to the source or ADC front end, use short analog traces, and add an input buffer when the source impedance is high. Validate worst-case settling against the required sampling rate rather than relying on nominal switch parameters alone.
Place the supply bypass capacitor immediately across the device supply and ground pins, and keep the serial control route away from the switched analog inputs. A continuous ground plane beneath the analog path reduces return-current discontinuities. For dual-polarity analog signals, confirm that every switched node remains inside the permitted signal range and that external clamping does not inject excessive transient current into the switch terminals.
Do not assume that two parts with the same MAX350 family name and the same package are electrically interchangeable without checking their suffix options. Verify the control protocol, supply limits, temperature grade, and qualification status for MAX350EWN+ and MAX350CWN+ in the manufacturer product-selection table. Also do not treat the MAX349 as a drop-in alternative: it uses a different channel organization even though it belongs to the related serial-multiplexer family.
合規資訊
The MAX350EWN+ is identified as RoHS compliant. No specific REACH declaration, halogen-free statement, or conflict-minerals report is established for this exact order code, so those fields remain unknown.
