MAX132CWG+ - 18-Bit, 100 SPS Multi-Slope ADC | Analog Devices
MPN： MAX132CWG+ ✗ 停產MAX132CWG+ 概覽
An ADC is an analog-to-digital converter: a semiconductor that converts a continuously varying analog voltage into a numeric value for processing, measurement, storage, or control. The MAX132 belongs to the multi-slope integrating ADC family. Its multi-slope conversion architecture provides high resolution without the conversion time associated with a conventional integrating ADC, making it useful for precision data acquisition, panel meters, weighing systems, and industrial measurement equipment.
The principal specifications available from the verified manufacturer information include an 18-bit plus-sign resolution, up to 100 conversions per second, a ±512 mV full-scale range, and 2 µV per LSB. These characteristics make the MAX132 appropriate when fine input resolution and compact serial communication are more important than very high sampling rates. The four-wire serial interface also simplifies connection to a controller compared with a parallel data bus.
The MAX132 family is offered in 24-pin narrow-DIP and wide-SO packages and in commercial and extended-temperature grades. The MAX132CWG+ is identified as the commercial-grade, gull-wing 24-pin SOP variant. The MAX132EWG+ is an extended-temperature counterpart identified in cross-reference information, while the MAX132CWG+T and MAX132EWG+T are tape-and-reel ordering variants rather than materially different converters.
Typical applications include data loggers, weigh scales, data-acquisition systems, and panel meters. In these systems, the ADC can digitize a conditioned sensor output and transfer the conversion result over its four-wire serial interface. The ±512 mV input range requires the source to remain within that range, with appropriate conditioning, common-mode treatment, input protection, and reference selection based on the measured signal.
Designers should follow the manufacturer data sheet for the exact pin names, electrical limits, reference configuration, conversion timing, and recommended input network. A clean reference voltage and well-controlled analog input are essential because offset, noise, and reference errors can limit the practical accuracy of the stated 18-bit conversion resolution. PCB layout should separate sensitive analog input and reference paths from digital clock and serial-data traces.
This page combines the verified manufacturer description, distributor identification, package information, family comparisons, and engineering guidance in one decision-oriented reference. It also distinguishes true device options from tape-and-reel packaging codes so procurement teams can select the correct manufacturer ordering code.
直接替換替代品，適用於 MAX132CWG+ — 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。
此系列的變體
與下列產品可直接替換的同系列型號： MAX132CWG+ （相同外形與佔位） — 差異在於 Full-Scale Input Range, Resolution, Conversion Architecture, Operating Temperature Range, Output Interface.
MAX132EWG+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX132EWG+T
✅ 直接替換📋 參考替代品（不在目錄中）
MAX132CWG+ 最大額定值與電氣特性
| Device Type | 18-bit plus-sign, serial-output analog-to-digital converter |
| Conversion Architecture | Multi-slope integration |
| 解析度 | 18 bit plus sign |
| Maximum Conversion Rate | 100 conversions/s |
| Full-Scale Input Range | ±512 mV |
| Input Resolution | 2 µV/LSB |
| 介面類型 | 4-wire serial interface |
| Number of Inputs | 1 input |
| Input Type | Pseudo-differential |
| 封裝 | 24-pin wide SOIC, gull-wing lead form |
| Number of Terminals | 24 terminals |
| Package Code | SOP |
| Package Shape | Rectangular |
| Temperature Grade | Commercial |
| RoHS 狀態 | unknown |
| REACH Status | compliant |
MAX132CWG+ rectangular 腳位配置指南
MAX132CWG+（rectangular 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。
無詳細腳位定義資料： MAX132CWG+.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX132CWG+ 適用於 6 應用s: Digital Weigh Scales, Panel Meters, Industrial Data Loggers, Precision Process Measurement, Portable Environmental Instruments, Laboratory Data-Acquisition Systems.
Digital Weigh Scales
The MAX132CWG+ fits digital weighing systems because it combines 18-bit plus-sign resolution with operation up to 100 conversions per second and a ±512 mV full-scale range. A load-cell signal is normally amplified, filtered, and level-shifted into that input window before conversion. The 2 µV per LSB input increment supports fine measurement resolution, while the four-wire serial interface reduces parallel-bus wiring in a scale controller. The trade-off is that practical weighing accuracy still depends on excitation stability, bridge balance, input amplification, grounding, and calibration rather than ADC resolution alone.
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Panel Meters
The MAX132CWG+ is appropriate for a digital panel meter because its 18-bit plus-sign multi-slope conversion supports fine display resolution while the 100-conversions-per-second capability provides responsive updates. A conditioned sensor or potentiometer voltage can feed the ±512 mV input range, and the four-wire serial connection reduces the number of traces between the converter and display controller. For stable readings, the reference and analog input should share a careful ground strategy. The converter should be mounted away from high-current display or relay paths to prevent those loads from perturbing the measurement.
推薦
Industrial Data Loggers
The MAX132CWG+ supports compact data-logger designs that need more resolution than a basic low-speed ADC while keeping the interface count low. Its ±512 mV full-scale input, 2 µV per LSB resolution, and four-wire serial interface are well suited to conditioned temperature, pressure, and process-sensing channels. The 100-conversions-per-second maximum is ample for many slowly changing industrial variables, but it is not intended for high-frequency waveform capture. Practical deployment should isolate the analog input from switching regulators and motors, provide stable reference voltage, and verify the exact electrical limits from the manufacturer document.
推薦
Precision Process Measurement
The MAX132CWG+ can serve as the conversion stage in a precision process-measurement instrument when the analog front end limits signals to ±512 mV. Its 18-bit plus-sign resolution and multi-slope architecture favor accurate numerical representation, while 100 conversions per second are suitable for many temperature, pressure, and flow variables. A low-noise reference and carefully filtered input are essential because offsets and reference errors propagate directly into the result. The serial interface frees board area, but designers should preserve grounding and separation between the analog input, reference, and digital control paths.
推薦
Portable Environmental Instruments
The MAX132CWG+ is suitable for portable environmental meters because it combines high-resolution conversion with a compact 24-pin wide SOIC package and a four-wire serial interface. A battery-powered thermometer, humidity instrument, or air-quality monitor can use the converter to digitize a conditioned analog sensor signal without requiring a wide parallel bus. The verified 100-conversions-per-second maximum is more than adequate for many environmental readings. Low power is a major design consideration, however, and the exact supply voltage and operating current must be obtained from the manufacturer data sheet because those values were not present in the supplied source text.
推薦
Laboratory Data-Acquisition Systems
The MAX132CWG+ is well matched to moderate-speed laboratory data acquisition where 18-bit plus-sign resolution and a ±512 mV input range are more useful than waveform sampling rates. It can digitize outputs from pressure, temperature, bridge, or laboratory sensor amplifiers while communicating through its four-wire serial interface. The multi-slope conversion method can provide high resolution in less time than a standard integrating ADC. For reliable measurements, designers should evaluate input bandwidth, settling behavior, reference accuracy, grounding, and input protection using the manufacturer timing and electrical data.
推薦
推薦產品摘要
工程參考資料，適用於 MAX132CWG+ — 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 | MAX132EWG+ | MAX132EWG+T |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 24-SOIC | 24-SOIC - same | 24-SOIC - same |
| Resolution | 18 bit plus sign | 18 bit plus sign | 18 bit plus sign |
| Conversion Architecture | Multi-slope integration | Multi-slope integration | Multi-slope integration |
| Maximum Conversion Rate | 100 conversions/s | 100 conversions/s | 100 conversions/s |
| Full-Scale Input Range | ±512 mV | ±512 mV | ±512 mV |
| Input Resolution | 2 µV/LSB | 2 µV/LSB | 2 µV/LSB |
| Interface | 4-wire serial interface | 4-wire serial interface | 4-wire serial interface |
| Temperature Grade | Commercial | Extended | Extended |
| Shipping Format | MAX132CWG+ ordering code | MAX132EWG+ ordering code | Tape-and-reel ordering code |
主要差異化特點
- Commercial-temperature selection (對比MAX132EWG+)
- High numeric resolution for measurement systems (對比MAX132EWG+T)
- Compact four-wire serial interface (對比MAX132EWG+)
設計說明
Route the analog input and reference paths away from digital serial-data and clock traces, and provide a continuous, low-impedance ground plane beneath the analog section. The MAX132CWG+ uses a four-wire serial interface, but its 18-bit plus-sign conversion does not prevent input-to-output coupling through shared supply and ground impedance. Keep the input node compact and place filtering components close to the appropriate device pins according to the manufacturer application guidance.
Do not equate the 18-bit plus-sign conversion specification with guaranteed end-to-end measurement accuracy. A ±512 mV input range and 2 µV/LSB resolution still depend on reference accuracy, offset, input noise, conditioning gain, and calibration. Verify every analog value against the actual signal range and apply suitable protection so transients cannot exceed the device's absolute maximum ratings.
Use local decoupling and separate sensitive analog routing from noisy switching supplies. The supplied source data does not provide the MAX132CWG+ supply-voltage limits, capacitor requirements, or current consumption, so those values must be taken directly from the manufacturer data sheet before schematic release. Because this is a precision ADC, reference and supply settling should be considered alongside conversion timing.
The four-wire serial interface reduces board routing compared with a parallel ADC, but the controller must still observe the manufacturer's specified clock, data setup, and hold timing. Avoid adding long stubs or routing serial signals over the analog input. If the converter is mounted near a switching converter, relay driver, or display power stage, place the sensitive analog section on the opposite side of the ground partition and use a quiet reference source.
合規資訊
The supplied Abacus Technologies result explicitly identifies MAX132CWG+ as REACH compliant. It states that PFAS status is no and DRC status is conflict free, but the authoritative conflict-minerals field cannot be inferred beyond that wording. RoHS, lead-free, halogen-free, and AEC-Q100 information was not supplied.
