MAX338ETE+T - 8:1 CMOS Analog Multiplexer | Analog Devices
MPN: MAX338ETE+T ✓ Hoạt độngMAX338ETE+T Tóm tắt
An analog multiplexer is an analog switch that routes one of several input signals to a shared output. A single 8:1 multiplexer provides eight selectable signal paths while reducing the number of external connections required between a source circuit and a measuring or processing circuit. The MAX338 is designed for precision signal-routing requirements and is fabricated using Maxim's 44V silicon-gate process.
The primary function is an 8:1 single-ended analog switch. Its specified 400 ohm on-resistance makes it suitable for routing moderate-impedance sensor, measurement, or control signals rather than high-current loads. TTL-compatible control inputs simplify connection to 5V CMOS and TTL control logic. Operation from either a single positive supply or dual supplies also supports systems that use positive-only or bipolar analog rails.
The MAX338 family is fabricated on a 44V silicon-gate process, providing the voltage headroom needed for the specified operating ranges. The manufacturer describes the MAX338 as a low-leakage CMOS analog multiplexer. Its improved multiplexing performance is intended to address both leakage and charge-injection considerations when selecting among analog sources, although exact device-level values should be confirmed in the manufacturer datasheet.
Typical applications include sensor-signal selection, data-acquisition front ends, instrumentation, industrial control, test and measurement equipment, and analog signal routing in systems operating from a single +5V rail or higher single-supply rails. The eight-to-one configuration is especially useful when a system must select among multiple analog inputs before conversion, amplification, comparison, or further signal conditioning.
When designing around the MAX338ETE+T, verify the exact supply limits, control-logic states, analog signal range, switch configuration, and exposed-pad connection against the manufacturer datasheet. Place the device so its thermal pad can dissipate heat as intended, keep sensitive analog routing away from fast-switching nodes, and account for off-state leakage and channel charge injection in high-impedance precision circuits.
This product page consolidates the MAX338ETE+T manufacturer specifications, verified product identifiers, source links, application guidance, design considerations, and qualified replacement information. It is structured to help engineers move from datasheet lookup to footprint-compatible sourcing without treating different package or electrical variants as interchangeable.
Bộ thay thế dễ dàng lắp đặt cho MAX338ETE+T — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX338ETE+T (cùng hình factor và footprint) — khác nhau ở Package, Mounting Type, Number of Channels, Leakage Characteristic, Multiplexer Configuration.
MAX338ETE+
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Xem tài liệu →MAX338EPE+
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Xem tài liệu →MAX338ETE+T Thông số kỹ thuật
| Multiplexer Configuration | Single 8:1 |
| Number of Circuits | 1 circuit |
| Number of Channels | 8 channels |
| Switch Type | 8:1 single-ended CMOS analog switch |
| On-Resistance | 400 ohm |
| Single-Supply Operating Range | +4.5V to +30V |
| Dual-Supply Operating Range | ±4.5V to ±20V |
| TTL-Compatible Control Input Range | +0.8V to +2.4V |
| Logic Compatibility | TTL compatible |
| Process Technology | Maxim 44V silicon-gate process |
| Hộp | 16-TQFN with exposed pad, 5 x 5 mm |
| Kiểu lắp đặt | Surface mount |
| Số chân | 16 pins plus exposed pad |
| Signal Type | Analog |
| Polarity | Single-ended |
| RoHS Compliance | RoHS compliant |
Hướng dẫn cấu hình chân MAX338ETE+T 16-tqfn with exposed pad, 5 x 5 mm
Cấu hình chân cho MAX338ETE+T (16-tqfn with exposed pad, 5 x 5 mm gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho MAX338ETE+T.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MAX338ETE+T phù hợp cho 6 Áp dụngs: Multichannel Sensor Acquisition, Data-Acquisition Front End, Industrial Process Monitoring, Precision Test and Measurement, Analog Signal Routing, Embedded Control and Instrumentation.
Multichannel Sensor Acquisition
The MAX338ETE+T is suitable for selecting among up to eight sensor outputs before a shared amplifier or converter. Its single 8:1 architecture keeps the source count manageable while the 400 ohm on-resistance suits moderate-impedance sensing paths. The device can operate from a single +4.5V to +30V supply or dual ±4.5V to ±20V supplies, allowing integration into both compact positive-rail systems and bipolar instrumentation. When impedance is high, evaluate the datasheet leakage and charge-injection characteristics, provide a defined state for every address and enable combination, and keep the analog input traces short and away from switching nodes.
Được đề xuất
Data-Acquisition Front End
The MAX338ETE+T can route one of eight single-ended analog channels into a common data-acquisition path, reducing the number of signal connections that must be presented to downstream circuitry. Its 400 ohm on-resistance is appropriate for many moderate-impedance acquisition sources, while TTL-compatible address and enable inputs from +0.8V to +2.4V simplify control from conventional digital logic. Operation from a single supply starting at +4.5V supports +5V systems. Designers should verify converter input range, source impedance, acquisition timing, and settling requirements, and should avoid routing high-energy digital signals adjacent to the analog input network.
Được đề xuất
Industrial Process Monitoring
The MAX338ETE+T fits industrial monitoring systems that must select among multiple process variables such as pressure, temperature, or analog control feedback. The 8:1 topology consolidates eight sources into one common analog channel, while the broad single-supply range of +4.5V to +30V supports systems with higher positive rails. Dual operation from ±4.5V to ±20V supports bipolar instrumentation where required. Because industrial sensors can present wide impedance and voltage ranges, confirm the input and supply limits in the manufacturer datasheet, maintain defined control states, and separate analog routing from motor, relay, and power-conversion switching paths.
Được đề xuất
Precision Test and Measurement
The MAX338ETE+T can route one of eight test sources to a shared instrument front end when making comparisons across multiple channels. Its 400 ohm on-resistance provides a defined insertion resistance for moderate-impedance sources, and the TTL-compatible controls enable direct connection to common digital test-control logic. The +4.5V to +30V single-supply range makes it practical in +5V and higher-voltage bench systems, while dual supplies support bipolar signal paths. For precision measurements, account for leakage, channel charge injection, source impedance, and settling time, and use short, guarded analog traces to reduce leakage and interference.
Được đề xuất
Analog Signal Routing
The MAX338ETE+T provides a compact way to route one of eight single-ended analog sources to a shared amplifier, comparator, or control input. Its CMOS implementation and 44V silicon-gate process support the stated single and dual supply ranges, while TTL-compatible address and enable inputs simplify system control. The device is best suited to low- and moderate-power signal selection rather than load switching, so check source impedance and current requirements. Keep the switched path away from clocks, power inductors, and relay drivers, and confirm control states during reset so the common output never receives an unintended transient from an unknown input.
Được đề xuất
Embedded Control and Instrumentation
The MAX338ETE+T can expand the analog input capability of an embedded controller by selecting among eight sensor or conditioning outputs. Its TTL-compatible control inputs allow address and enable signals to be generated by common embedded digital logic, and the device operates from +4.5V to +30V, which covers +5V and higher positive-rail systems. The 8:1 arrangement reduces repetitive analog wiring while centralizing routing in a surface-mount package. Confirm the analog voltage limits against the controller's supplies, account for the 400 ohm series resistance in the signal chain, and define safe control states during boot, reset, and firmware updates to prevent unintended channel selection.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX338ETE+T — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MAX338ETE+ | MAX338EPE+ |
|---|---|---|---|
| Package | 16-TQFN with exposed pad (5 x 5 mm) | 16-TQFN with exposed pad (5 x 5 mm) | 16-TQFN with exposed pad (5 x 5 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Multiplexer Configuration | Single 8:1 | Single 8:1 | Single 8:1 |
| Number of Channels | 8 channels | 8 channels | 8 channels |
| On-Resistance | 400 ohm | 400 ohm | 400 ohm |
| Single-Supply Range | +4.5V to +30V | +4.5V to +30V | +4.5V to +30V |
| Dual-Supply Range | ±4.5V to ±20V | ±4.5V to ±20V | ±4.5V to ±20V |
| Control Input Compatibility | TTL compatible, +0.8V to +2.4V | TTL compatible, +0.8V to +2.4V | TTL compatible, +0.8V to +2.4V |
| Process Technology | Maxim 44V silicon-gate process | Maxim 44V silicon-gate process | Maxim 44V silicon-gate process |
| Signal Configuration | Single-ended analog | Single-ended analog | Single-ended analog |
Bảo phân biệt quan trọng
- Single-package 8:1 analog multiplexing (vsMAX338ETE+)
- Positive and bipolar supply operation (vsMAX338EPE+)
- TTL-compatible external control (vsMAX338ETE+)
Ghi chú thiết kế
Use the Analog Devices package drawing and pin-description table to assign the 16 numbered TQFN lands. The exposed pad is a thermal and electrical land that must be connected according to the manufacturer datasheet rather than treated as an unused pin. Place input, output, and control traces in a way that minimizes coupling from adjacent digital and power signals. For high-impedance sources, keep the routed analog path short and consider a grounded guard where the board stack-up permits it.
Decouple the supply pins with local high-frequency bypass capacitance and bulk capacitance located close to the device. The MAX338ETE+T supports single supplies from +4.5V to +30V and dual supplies from ±4.5V to ±20V, but the chosen operating condition must also respect absolute maximum limits. Confirm bypass capacitor voltage ratings for higher-voltage rails, and use the datasheet's supply recommendations as the authoritative basis for stability and transient performance.
The 400 ohm on-resistance is a meaningful divider element when the source and destination impedances are high. Include that resistance when estimating channel attenuation and settling behavior, and verify leakage, charge injection, bandwidth, and crosstalk against the precision requirements of the application. Drive address and enable inputs so every invalid combination has a defined state, and validate channel transitions in the complete acquisition chain rather than relying only on nominal on-resistance.
Keep the multiplexed analog output route away from clocks, relay drivers, power inductors, and high-di/dt switching nodes. Give the common analog node a continuous ground reference and avoid splitting the return path beneath the device. If the selected footprint includes an exposed thermal pad, follow the datasheet's pad-connection guidance and preserve thermal-copper access. Bench validation should include both functional channel selection and noise or glitch testing under the expected clocking and load conditions.
Thông tin tuân thủ
RoHS-compliant status is identified in the MAX338 product comparison information. No separate REACH, halogen-free, conflict-minerals, or automotive qualification statement is identified for this part.
