MAX132ENG+ - 18-Bit 100SPS Serial ADC | Analog Devices
MPN: MAX132ENG+ ✓ نشطMAX132ENG+ نظرة عامة
An ADC is a data-conversion IC that transforms an analog voltage into a numeric value for measurement, control, display, or storage. The MAX132 belongs to the ADC and DAC hierarchy within interface integrated circuits. Unlike flash or successive-approximation converters, its multi-slope architecture integrates the input over a controlled interval, supporting high resolution with low conversion speed. The MAX132 is therefore most relevant to precision instrumentation rather than high-bandwidth signal capture.
The converter's 18-bit resolution represents a 262,144-code theoretical range. Its serial I/O interface can provide programmed output for multiplexed measurements and programmable-gain operation, reducing the number of external analog channels and conditioning components required in a measurement system. A 100 conversions-per-second ceiling supports responsive control, while the lower accuracy rate specified at 16 conversions per second reflects multi-slope conversion behavior.
Low power is a central benefit. Normal-operation supply current is 60 µA, while sleep mode reduces it to 1 µA. The datasheet also reports 15 µVrms low noise and ±2 pA input current. These characteristics suit battery-powered or intermittently operated instruments because the converter can reduce average current through its sleep state without requiring an external system power switch.
Typical applications include data loggers, weighing scales, data-acquisition systems, panel meters, precision process measurement, and low-frequency industrial sensing. The manufacturer identifies these uses because the MAX132 balances high resolution, compact size, and low power rather than emphasizing rapid sampling or high-bandwidth signal processing.
PCB design should preserve analog signal integrity by keeping the analog input path short and placing input and reference bypass capacitors close to their associated pins. Designers should also verify supply-voltage limits and serial-interface timing before replacing an existing MAX132-based design, particularly because the long-established 24-pin PDIP footprint simplifies through-hole prototyping and legacy maintenance.
This page combines the verified manufacturer specifications, distributor pricing and inventory information, and cross-reference evidence with engineering-focused guidance on accuracy, power management, applications, and drop-in sourcing. The MAX132ENG+ product listing is intended to support direct purchasing and informed component selection rather than simply reproducing raw catalog fields.
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MAX132CNG+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX132ENG+ الحدود القصوى والخصائص الكهربائية
| الدقة | 18 bit |
| Input Channel Count | 1 |
| Conversion Type | Multi-slope |
| Maximum Conversion Rate | 100 conversions/s |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Accuracy | ±0.006% FSR at 16 conversions/s |
| Input Noise | 15 µVrms |
| Normal-Mode Supply Current | 60 µA |
| Sleep-Mode Supply Current | 1 µA |
| Input Current | ±2 pA |
| الواجهة | Serial |
| Input Range | Dual polarity |
| العلبة | 24-pin PDIP |
| نوع التركيب | Through-hole |
| Temperature Grade | Industrial |
| Manufacturer List Price Starting From | $19.38 |
دليل تكوين أطراف MAX132ENG+ 24-pin pdip
تكوين الأطراف لـ MAX132ENG+ (حزمة 24-pin pdip). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ MAX132ENG+.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
MAX132ENG+ مناسب لـ 6 التطبيقs: Digital Weighing Scales, Industrial Panel Meters, Battery-Powered Data Loggers, Precision Process Measurement, Precision Laboratory Instruments, Serial Data-Acquisition Systems.
Digital Weighing Scales
The MAX132ENG+ suits precision weighing systems that need an 18-bit measurement range without the conversion speed of a high-rate successive-approximation ADC. Its stated ±0.006% full-scale accuracy at 16 conversions/s provides a useful accuracy reference near the lower end of its 100 conversions/s capability, while the 15 µVrms noise specification supports stable readings from a load-cell amplifier. The device can acquire bridge-sensor signals, convert them through its serial interface, and pass results to a controller for display, calibration, and zero tracking. Because conversion accuracy depends on rate and implementation, engineers should follow the manufacturer application guidance and verify averaging behavior before defining scale resolution.
موصى به
Industrial Panel Meters
The MAX132ENG+ is appropriate for panel meters that display slow-changing process variables such as pressure, temperature, level, or flow. An 18-bit converter can preserve more measurement information than a lower-resolution meter ADC, while the 100 conversions/s maximum rate is more than sufficient for typical human-readable updates. The 24-pin PDIP format also supports repairable, panel-oriented through-hole assemblies where rugged leaded construction is preferable. The serial interface reduces parallel wiring, and the 1 µA sleep current can help conserve power between updates. Input conditioning, reference stability, calibration storage, and isolation from noisy motor or relay circuits remain critical to achieving useful panel-meter accuracy.
موصى به
Battery-Powered Data Loggers
The MAX132ENG+ can serve as the measurement ADC in a low-duty-cycle battery-powered data logger because its normal-mode supply current is 60 µA and sleep-mode current is 1 µA. That low converter consumption leaves more of the power budget for the sensor, reference, and wireless transmission stages. The 18-bit resolution is valuable when logging slowly varying environmental or industrial measurements, and the serial interface permits compact controller integration. Designers should switch the converter into sleep mode between samples, account for wake and settling time, and verify that reference and sensor currents do not overwhelm the savings. The 100 conversions/s limit suits periodic logging rather than continuous high-rate waveform acquisition.
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Precision Process Measurement
The MAX132ENG+ is a practical choice for slow industrial process measurements where a 10-bit meter converter would discard useful detail but a very high-speed ADC would be unnecessary. Its 18-bit resolution, ±0.006% full-scale accuracy at 16 conversions/s, and low 15 µVrms noise provide a strong starting point for pressure, flow, level, and temperature instrumentation. The multi-slope conversion approach is well suited to periodic readings from stable sensors. For reliable deployment, place the analog input and reference paths away from switching converters and relay transients, use suitable bypass and filtering, and confirm the complete signal chain against the converter's input range and datasheet timing.
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Precision Laboratory Instruments
The MAX132ENG+ can support laboratory measurement equipment that captures stable analog quantities with high resolution but limited bandwidth. Examples include bench multimeters, reference-voltage monitors, laboratory loggers, and controlled test fixtures. At up to 100 conversions/s, the converter can complete readings quickly enough for many front-panel or automated test cycles, while the 18-bit format avoids discarding measured information. The 15 µVrms noise and ±0.006% full-scale accuracy specification should be evaluated at the actual conversion rate and with the intended reference. A serial interface simplifies connection to embedded controllers, but shielding, guarding, clean grounding, and input filtering are important in low-level laboratory measurements.
موصى به
Serial Data-Acquisition Systems
The MAX132ENG+ works well in compact serial data-acquisition systems where one analog channel must be measured with high resolution and the resulting data sent to a controller. Its programmed serial I/O, mux, and PGA functionality can simplify front-end channel selection and gain control. With a maximum conversion rate of 100 conversions/s, it is suited to environmental, industrial-status, and laboratory sampling rather than audio-rate or vibration waveform acquisition. System designers should include an external reference with suitable stability, observe the stated supply range of 4.5 V to 5.5 V, and account for settling time between analog input and gain changes. Serial timing and logic levels should also be verified against the host controller.
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ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX132ENG+ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX132CNG+ |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | PDIP-24 | PDIP-24 - same package |
| Resolution | 18 bit | 18 bit |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Interface | Serial | Serial |
أبرز الفروقات
- Verified industrial-temperature grade (مقابلMAX132CNG+)
- High resolution for precision measurement (مقابلMAX132CNG+)
- Low-power operation with a 24-pin legacy footprint (مقابلMAX132CNG+)
ملاحظات التصميم
Route the analog input and reference connections away from digital serial lines, switching nodes, and relay-drive traces. Keep the input trace short, use a continuous ground plane, and place input, reference, and supply bypass capacitors close to the appropriate MAX132 pins. The verified sources confirm an 18-bit multi-slope converter with 15 µVrms noise, so board-level leakage and reference instability can be significant relative to the intended measurement resolution.
Operate the MAX132ENG+ only within its verified 4.5 V to 5.5 V supply range and follow the manufacturer datasheet for bypass capacitance and startup sequencing. Normal-mode supply current is 60 µA and sleep-mode current is 1 µA, so use sleep mode when measurements are intermittent. The external reference and sensor-conditioning circuits can dominate total power, and their current requirements should be included when calculating battery life.
Do not treat the stated ±0.006% full-scale accuracy as rate-independent: the verified specification applies at 16 conversions/s, while the device supports up to 100 conversions/s. Also confirm mux, PGA, reference, and serial-output settings in the manufacturer datasheet before calculating expected error. Cross-reference listings are useful for discovery, but MAX132CNG+ must be checked at pin level because the available comparison explicitly notes differing electrical characteristics.
معلومات الامتثال
The verified comparison listing references RoHS details but does not explicitly provide the status. The MAX132ENG+ is an industrial-temperature ADC and is not identified as an automotive-qualified AEC-Q100 device in the supplied data.
