MAX135EPI+ - 15-Bit Low-Power Parallel ADC | Maxim Integrated
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MAX135CPI+
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查看資料表 →MAX135EPI+ 最大額定值與電氣特性
| Converter Type | Multi-slope integrating ADC |
| 解析度 | 15 bits |
| Number of Channels | 1 channel |
| Output Interface | Parallel binary |
| Conversion Rate | 16 conversions per second |
| 供應電壓 | 4.5 V |
| Architecture | CMOS multi-slope integration |
| 封裝 | 28-pin PDIP |
| Terminal Count | 28 terminals |
| 安裝類型 | Through-hole |
| Temperature Grade | Industrial |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
MAX135EPI+ 28-pin pdip 腳位配置指南
MAX135EPI+（28-pin pdip 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
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典型應用
MAX135EPI+ 適用於 6 應用s: Industrial Process Measurement, Precision Sensor Interface, Laboratory Data Acquisition, Environmental Monitoring, Control System Analog Front End, Educational and Prototyping Systems.
Industrial Process Measurement
The MAX135EPI+ is well suited to industrial process measurement because its 15-bit multi-slope integrating ADC emphasizes noise performance during relatively slow conversions. At 16 conversions per second, it can digitize temperature, pressure, flow, and level transducer signals while rejecting periodic interference through integration. The parallel binary output can feed a microprocessor or programmable-logic acquisition stage without a serial protocol. The 4.5 V supply and industrial temperature grade support industrial-equipment architecture, although the exact input range, reference voltage, and front-end gain must be confirmed in the MAX135 datasheet before transducer conditioning is finalized.
推薦
Precision Sensor Interface
For bridge, strain-gauge, and slow precision-sensor interfaces, the MAX135EPI+ provides a 15-bit conversion result using a multi-slope integration architecture. The integration period can reduce uncorrelated noise compared with a basic flash or successive-approximation converter, improving usable resolution in low-frequency measurement systems. Its 16 conversions-per-second rate matches slow-changing sensor outputs rather than dynamic waveforms. A low-noise reference, protected input network, and suitable analog gain stage remain essential because the verified excerpts do not specify the input range, reference requirement, or input-referred noise.
推薦
Laboratory Data Acquisition
The MAX135EPI+ can serve as the conversion engine in a laboratory data-acquisition system where repeatable low-frequency readings and direct digital access are more important than high sampling bandwidth. A 15-bit result, parallel binary output, and 16 conversions-per-second tested rate provide a clear interface between the analog measurement front end and a controller or FPGA. The 28-pin PDIP package also simplifies bench prototyping and socket-based serviceability. In an instrument design, designers should budget conversion latency, synchronize the acquisition clock with the digital output, and consult the datasheet for data-valid timing.
推薦
Environmental Monitoring
The MAX135EPI+ is appropriate for environmental monitoring equipment that samples changing temperature, humidity, gas, or water-level signals at a controlled rate. Its multi-slope integration can improve rejection of broadband noise for slowly varying measurements, while the 15-bit conversion result provides adequate digital resolution for many calibrated sensing systems. The parallel interface enables deterministic sampling by a microcontroller or CPLD. A protected analog front end and reference design are still required, because the supplied verified data does not specify input impedance, common-mode range, reference accuracy, or conversion latency.
推薦
Control System Analog Front End
The MAX135EPI+ can provide digitized feedback for closed-loop industrial controllers monitoring slow analog variables. A 16 conversions-per-second update rate is adequate for temperature, pressure, and actuator-position loops that do not require kilohertz sampling. The parallel output reduces serial-interface overhead and allows the controller to latch a stable conversion result through deterministic hardware timing. The 4.5 V supply requirement must be reconciled with the rest of the control-board rail plan, and input-reference, input-range, and timing details require confirmation from the official MAX135 datasheet.
推薦
Educational and Prototyping Systems
The through-hole 28-pin PDIP package makes MAX135EPI+ convenient for educational, prototype, and legacy-equipment projects where manual assembly or socket replacement is valuable. Its parallel output can be observed with standard logic or captured by a microcontroller, allowing students or engineers to study integrating-ADC behavior, conversion timing, and digital interface design. The device should not be selected for waveforms above its 16 conversions-per-second class. Prototype users should follow the datasheet bypass and reference recommendations, preserve the specified input limits, and avoid inferring pin functions from the package outline alone.
推薦
工程參考資料，適用於 MAX135EPI+ — 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 | MAX135CPI+ |
|---|---|---|
| Package | 28-pin PDIP | 28-pin PDIP - same |
| Brand | Maxim Integrated | Maxim Integrated - same |
| Converter Type | Multi-slope integrating ADC | Multi-slope integrating ADC - consistent main performance characteristics |
| Temperature Grade | Industrial | C-grade variant |
| Mounting Type | Through-hole | DIP 28-pin |
| Pin Compatibility | 28-pin PDIP reference footprint | Consistent terminals; no PCB modification stated |
主要差異化特點
- Noise-oriented conversion architecture (對比MAX135CPI+)
- Direct parallel acquisition (對比MAX135CPI+)
- Industrial-grade ordering option (對比MAX135CPI+)
設計說明
Design the MAX135EPI+ supply and reference network directly from the manufacturer MAX135 datasheet. The verified product data confirms a 4.5 V supply but does not provide current consumption, allowable supply range, reference voltage, or decoupling values. Use the datasheet-specified bypass capacitance and layout at the supply and reference pins rather than generic values. This is especially important for a multi-slope ADC because reference instability can directly translate into conversion-code error.
Keep the analog input, reference, and supply-return paths short and physically separated from digital output and clock routing. The parallel interface can produce fast edge-related crosstalk when long traces are left unterminated. Follow the datasheet ground and layout guidance, provide a local reference return, and avoid routing high-current switching nodes near the input pins. Since the supplied pinout excerpt does not include numbered functions, do not begin layout until the official 28-pin diagram has been checked.
Do not treat the MAX135EPI+ as a general-purpose high-speed ADC. Its tested conversion rate is 16 conversions per second, so waveform sampling and transient-event capture will be limited. Also avoid using the distributor description of the family as a substitute for the exact datasheet: one distributor snippet calls the product a 16-bit converter, while the Analog Devices product page identifies MAX135 as 15-bit. The exact input range, reference requirements, acquisition timing, and missing-pin behavior must be taken from the manufacturer datasheet.
合規資訊
The '+' suffix is identified as the lead-free ordering configuration in the supplied product listings. RoHS, REACH, halogen-free, and conflict-minerals status were not explicitly present in the verified excerpts and are therefore not assumed.