MPC508AU/1K - 8:1 16V Analog Multiplexer | Texas Instruments
MPN: MPC508AU/1K ✓ فعالMPC508AU/1K نمای کلی
An analog multiplexer is a switching interface that connects multiple analog signals to one input on an ADC, data converter, measurement instrument, or control system. The MPC508A belongs to the broader CMOS analog-switch and multiplexer hierarchy within interface ICs. In its 8:1 single-ended configuration, three address lines select one of eight input channels, reducing the number of external converter inputs required in multichannel measurement equipment.
The principal feature is its 70-V peak-to-peak analog overvoltage protection. This allows an input to exceed the normal ±15 V signal range without damaging the multiplexer or disturbing other channels. Break-before-make switching further improves channel isolation by preventing two channels from being connected together during address transitions. These features are useful when external equipment, fault conditions, or long signal lines can place unexpected voltage on an analog input.
The MPC508AU/1K is fabricated as a CMOS analog multiplexer and operates from a 16-V supply. Its stated standby power is 7.5 mW typical, while its nominal on-resistance is 1.5 kOhm. The 16-SOIC package measures approximately 0.295 inches, or 7.50 mm, in width. The /1K ordering code is supplied in tape-and-reel form for automated manufacturing, although the provided data does not state the reel quantity.
Typical uses include multiplexed data acquisition, instrumentation, industrial control, test and measurement, and signal-routing circuits where one ADC input can serve several analog sensors. The protected inputs are particularly relevant when connected to external equipment where transient or sustained overvoltage is possible. Engineers should still validate the complete signal path against the absolute maximum ratings because overvoltage protection does not remove the need for suitable source impedance, scaling, and external energy limitation.
When laying out a design, route the selected analog output as a short, guarded trace and place the multiplexer close to the ADC or measurement front end. Keep digital address traces away from the analog input and output paths, use a common ground reference, and avoid unnecessary stubs. If source impedance or settling time is important, verify the complete acquisition system rather than relying only on the nominal 1.5-kOhm on-resistance.
This page consolidates verified manufacturer and distributor information, practical application guidance, parameter comparisons, and sourcing details. It also clearly identifies where package, pinout, pricing-tier, and drop-in replacement data were not supplied rather than inventing engineering values.
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درخواست جایگزینMPC508AU/1K مشخصات
| Product Type | 8:1 single-ended analog multiplexer |
| Number of Channels | 8 analog input channels |
| ولتاژ تغذیه | 16 V |
| Analog Signal Range | ±15 V |
| On-Resistance | 1.5 kOhm nominal |
| Analog Overvoltage Protection | 70 V peak-to-peak |
| Switching Behavior | Break-before-make |
| Overvoltage Channel Interaction | No channel interaction during overvoltage |
| Standby Power | 7.5 mW typical |
| محدوده دمای کاری | -40°C to +85°C |
| بسته‌بندی | 16-SOIC, 0.295 inch / 7.50 mm width |
| نوع نصب | Surface mount |
| Circuit Count | 1 multiplexer circuit |
| Multiplexing Mode | 8:1 single-ended |
| Technology | CMOS |
| Second Source | True |
راهنمای پیکربندی پین MPC508AU/1K 16-soic, 0.295 inch / 7.50 mm width
پیکربندی پین برای MPC508AU/1K (پکیج 16-soic, 0.295 inch / 7.50 mm width). شماره‌گذاری پایه‌ها، عملکردها و نمودارهای اتصال در دیتاشیت سازنده تعریف شده است. برای footprint دقیق و دستورالعمل‌های لحیم‌کاری به آن مراجعه کنید.
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کاربردهای معمول
MPC508AU/1K مناسب است برای 6 کاربردs: Industrial Data Acquisition, Precision Test and Measurement, Analog Sensor Interface, Automated Equipment Signal Routing, Communication and Control Interfaces, Power and System Monitoring.
Industrial Data Acquisition
The MPC508AU/1K fits multichannel industrial measurement systems where eight single-ended sensor outputs must feed one ADC. Its 8:1 architecture reduces the converter input count, while the 1.5-kOhm nominal on-resistance and 70-V peak-to-peak overvoltage protection add useful margin around external sensor lines. Place the device near the ADC to minimize sensitive analog routing and use its true second-source status as an additional sourcing consideration. System settling time must still be verified with the actual source impedance, sample-and-hold acquisition window, and selected data converter.
پیشنهادی
Precision Test and Measurement
The MPC508AU/1K is suitable for bench instruments that route several analog test points to a shared measurement channel. Eight single-ended inputs reduce front-panel wiring complexity, and the specified ±15 V signal range supports conventional bipolar instrumentation signals. The protected input architecture is useful when operators or external fixtures may expose the input to excessive voltage, although designers should add source limiting where high-energy transients are possible. Accuracy analysis should include switch on-resistance, leakage, settling behavior, and the acquisition circuit rather than relying on nominal resistance alone.
پیشنهادی
Analog Sensor Interface
The MPC508AU/1K can connect multiple temperature, pressure, position, or level sensor outputs to one analog converter channel. Its single-ended 8:1 format simplifies firmware-based channel selection, while break-before-make operation prevents address-change overlap between channels. The 70-V peak-to-peak input protection can improve robustness when sensors and wiring are exposed to industrial transients, but it does not replace correctly scaled surge protection. Place sensor returns and the multiplexer ground on a low-impedance common reference to reduce conversion error.
پیشنهادی
Automated Equipment Signal Routing
The MPC508AU/1K supports automated test equipment that selects among multiple low-frequency analog sources under software control. Eight single-ended inputs reduce the number of external routing switches and connector contacts, while the 16-V operating range suits conventional powered analog circuits. Break-before-make behavior helps preserve channel integrity during address transitions. For high-speed instrumentation, verify bandwidth, charge injection, off-channel isolation, and acquisition settling from the complete datasheet because those values were not included in the verified source excerpts supplied here.
پیشنهادی
Communication and Control Interfaces
The MPC508AU/1K can route monitoring signals within communication equipment, industrial controllers, and interface modules that use one measurement ADC for several internal sources. Its CMOS implementation, 16-V supply operation, and eight-channel single-ended organization suit compact control boards where component count and routing simplicity matter. Keep the three address-control traces short and away from the analog output, and use a solid ground plane to limit coupling. The mux should be treated as a signal-routing element rather than a substitute for analog gain, filtering, or precision conversion.
پیشنهادی
Power and System Monitoring
The MPC508AU/1K is applicable to systems that monitor several voltage, current, or status-derived analog points with a shared converter. The 8:1 arrangement allows the controller to sample power rails and subsystem conditions sequentially, while the overvoltage protection reduces the risk of channel disturbance if a monitored node exceeds the normal ±15 V range. Place the mux close to the ADC, reference every analog input to the same ground, and verify leakage, sampling resolution, and settling for the worst-case source impedance. It is best suited to low-frequency monitoring rather than high-bandwidth power conversion.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MPC508AU/1K — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول |
|---|---|
| Product Type | 8:1 single-ended analog multiplexer |
| Channel Count | 8 input channels |
| Supply Voltage | 16 V |
| Analog Signal Range | ±15 V |
| On-Resistance | 1.5 kOhm nominal |
| Overvoltage Protection | 70 V peak-to-peak |
| Switching Behavior | Break-before-make |
| Package | 16-SOIC, 0.295 inch / 7.50 mm width |
| Brand | Texas Instruments |
| Operating Temperature Range | -40°C to +85°C |
| Standby Power | 7.5 mW typical |
| Technology | CMOS |
تفاوت‌های کلیدی
- Protected eight-channel analog routing (در مقابلUnprotected generic 8:1 analog multiplexer)
- Channel-transition isolation (در مقابلBasic break-before-make analog switch implementation)
- Single-ended multiplexing efficiency (در مقابلSeparate single-pole analog switches)
- Industrial temperature capability (در مقابلCommercial-temperature analog multiplexer)
یادداشت‌های طراحی
Place the MPC508AU/1K close to the ADC or receiver of the selected analog channel. The multiplexer's 1.5-kOhm nominal on-resistance forms part of the source impedance seen by the converter, so long traces can increase settling time and susceptibility to injected noise. Route the common output as a short trace, keep the eight input traces away from high-speed digital lines, and provide a continuous ground plane. If the inputs originate on remote cables, place suitable protection and impedance-control networks before the multiplexer pins.
Use break-before-make switching as intended by the MPC508A architecture, but do not assume that switching transients are absent. Allow the analog input and output network to settle before sampling after an address change. Acquisition time must be calculated using the actual source resistance, the switch on-resistance, the ADC sampling capacitance, and the converter conversion window. For slow-changing or DC signals, additional filtering can help; for fast signals, consult the manufacturer bandwidth, charge-injection, and off-channel isolation data before finalizing the design.
The 70-V peak-to-peak overvoltage-protection rating should not be interpreted as permission to apply arbitrary sustained voltages. Confirm the absolute maximum input ratings, supply sequencing, and external fault-energy limits in the manufacturer datasheet. For persistent out-of-range sources, add series resistance, clamps, or an external protection device sized for the actual source. The verified claim of no channel interaction during overvoltage supports signal-path integrity, but it does not replace a system-level protection strategy.
Route the three digital address lines as a compact group and keep switching return currents out of the analog output area. Use a single, well-defined analog ground reference for the selected source, multiplexer, and receiving converter unless the complete system intentionally uses an isolation boundary. Decouple the 16-V supply close to the device according to the manufacturer guidance, and avoid creating a large loop between the mux ground pins and the board ground plane. This helps prevent address transitions and supply currents from modulating the measurement signal.
اطلاعات انطباق
The supplied verified excerpts do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because MPC508AU/1K is an industrial/interface analog multiplexer rather than an automotive-qualified device in the provided data.
