MCP3302-CI/SL - 13-Bit Dual-Channel ADC | Microchip
MPN： MCP3302-CI/SL ✓ 啟用中MCP3302-CI/SL 概覽
An ADC is a data-acquisition IC that converts an analog voltage into a digital value for processing, measurement, logging, or control. The MCP3302 belongs to the successive-approximation ADC hierarchy, where an internal sample-and-hold circuit and successive comparison process each input. It is a low-power analog-to-digital converter within the broader ADC and data-conversion IC category.
Key features include 13-bit resolution, 100 ksps conversion throughput, two differential or four single-ended input configurations, and a single-supply operating point of 5.5 V. Differential inputs support rejection of common-mode voltage and measurement of small signals placed between two input nodes, while the single-ended configuration can use four channels referenced to ground.
The -C grade provides maximum differential nonlinearity and integral nonlinearity values of ±1 LSB and ±2 LSB, respectively. These characteristics describe how closely the converter's transfer function follows an ideal straight line. The MCP3302T-CI/SL variant uses the same converter in a tape-and-reel ordering configuration, while MCP3302-CI/SL is supplied in the non-tape-and-reel configuration.
Typical uses include battery-powered environmental monitoring, remote sensor acquisition, industrial process measurement, laboratory instrumentation, and low-speed precision control. Differential measurements are especially useful for bridge sensors and current-sense systems where a signal is expressed between two analog nodes rather than relative to ground.
When designing around this ADC, place input and reference-decoupling capacitors close to their pins, keep analog and digital return currents separate, and use a stable reference source when measurement accuracy matters. The SPI interface simplifies connection to microcontrollers, but software must correctly handle conversion timing and the device's input-code format.
This product page combines the manufacturer information with practical acquisition guidance, drop-in family comparisons, pin-package constraints, and design notes for engineers evaluating the MCP3302-CI/SL in low-power precision ADC applications.
直接替換替代品，適用於 MCP3302-CI/SL — 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： MCP3302-CI/SL （相同外形與佔位） — 差異在於 Differential Input Channels, Differential Nonlinearity, Package, Single-Ended Input Channels.
MCP3303-CI/SL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP3304-CI/SL
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MCP3305-CI/SL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP3302-CI/SL 最大額定值與電氣特性
| ADC Resolution | 13 bit |
| Conversion Architecture | Successive-approximation (SAR) |
| Differential Input Channels | 2 channels |
| Single-Ended Input Channels | 4 channels |
| Maximum Conversion Rate | 100 ksps |
| 供應電壓 | 5.5 V single supply |
| Differential Nonlinearity | ±1 LSB maximum |
| Integral Nonlinearity, -C Grade | ±2 LSB maximum |
| Digital Interface | SPI serial interface |
| Input Type | Voltage input |
| 封裝 | 14-pin SOIC |
| Package Code | SOP |
| Terminal Count | 14 terminals |
| Package Shape | Rectangular |
| Terminal Form | Gull wing |
| Temperature Grade | Industrial |
| Mounting Technology | Surface mount |
| RoHS 狀態 | Unknown |
MCP3302-CI/SL rectangular 腳位配置指南
MCP3302-CI/SL（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： MCP3302-CI/SL.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP3302-CI/SL 適用於 6 應用s: Battery-Powered Sensor Acquisition, Remote Environmental Monitoring, Precision Bridge Measurement, Laboratory Instrument Front End, Industrial Process Control, Low-Power Data Logger.
Battery-Powered Sensor Acquisition
The MCP3302-CI/SL fits battery-powered sensor nodes that need higher resolution than a basic 8-bit or 12-bit measurement path. Its 13-bit SAR conversion, 100 ksps maximum throughput, and low-power design support periodic sampling while limiting conversion energy. The two differential inputs can measure bridge or ratiometric signals where the useful output lies between two sensing nodes, reducing sensitivity to common supply variation. A system designer should use the manufacturer timing information to schedule acquisitions, disable unnecessary activity between samples, and size the reference and decoupling network for the required accuracy.
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Remote Environmental Monitoring
The MCP3302-CI/SL is useful in remote environmental monitoring systems that combine several slowly changing measurements with occasional faster sampling. Four single-ended inputs can support temperature, light, pressure, or status signals when a common-ground arrangement is acceptable, while differential pairs suit resistive sensors with small output voltages. The 100 ksps specification leaves timing margin for synchronized sampling of multiple channels. Firmware should begin each conversion at controlled intervals, read the SPI result consistently, and compensate temperature-dependent sensor behavior within the data-processing chain.
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Precision Bridge Measurement
The MCP3302-CI/SL is appropriate for strain, pressure, and resistive bridge measurements where the useful signal is differential and relatively small. The two differential inputs allow the converter to measure a bridge imbalance without requiring either sensor lead to become a system ground. At the same time, the 13-bit resolution and ±2 LSB maximum integral nonlinearity for the -C grade provide defined conversion-linearity limits. The analog front end should include suitable excitation, filtering, input biasing, and reference conditioning so that sensor excitation drift and ADC nonlinearity do not dominate the measurement error.
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Laboratory Instrument Front End
The MCP3302-CI/SL can form the measurement front end of a compact laboratory instrument that combines adjustable conversion timing with a straightforward SPI interface. The 100 ksps maximum rate supports faster-than-human-response measurements while permitting lower-rate operation when longer integration or averaging is desirable. Its 13-bit resolution is useful for general-purpose voltage acquisition, although a precision reference and careful grounding are needed when the instrument is expected to approach the converter's linearity limits. Use the manufacturer acquisition guidelines to prevent settling errors during multiplexed channel measurements.
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Industrial Process Control
The MCP3302-CI/SL is suitable for monitoring slow or moderate-speed industrial process variables when the controller already supports SPI. Its industrial temperature grade, dual differential capability, and configurable single-ended channel count provide flexibility for pressure, current, and equipment-status measurements. The differential arrangement is especially useful when a transducer produces a small voltage around a common-mode level. In a deployed control system, the design should isolate analog and digital returns, protect external inputs from industrial transients, and verify that the selected reference remains stable over the required environmental range.
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Low-Power Data Logger
The MCP3302-CI/SL fits compact data loggers that periodically record analog sensor values and then return the results through a microcontroller. The 13-bit resolution increases sensitivity to small changes, and the 100 ksps capability permits short bursts of samples when transient behavior must be captured. Four single-ended channels can reduce the number of separate converter packages when multiple sensors share a suitable reference arrangement. Firmware should control the sampling duty cycle, maintain a stable reference between measurements, and use CRC or another integrity mechanism if stored records are transported over a noisy communication link.
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推薦產品摘要
工程參考資料，適用於 MCP3302-CI/SL — 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 | MCP3303-CI/SL | MCP3304-CI/SL | MCP3305-CI/SL |
|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Resolution | 13 bit | 12 bit | 13 bit | 16 bit |
| Conversion Architecture | Successive-approximation (SAR) | Successive-approximation (SAR) | Successive-approximation (SAR) | Successive-approximation (SAR) |
| Maximum Conversion Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Digital Interface | SPI serial interface | SPI serial interface | SPI serial interface | SPI serial interface |
主要差異化特點
- Two differential channels preserve common-mode rejection for bridge-oriented measurements (對比MCP3304-CI/SL)
- A 13-bit conversion provides a practical balance of resolution and conversion throughput (對比MCP3303-CI/SL)
- The exact non-reel ordering code avoids an unintended packaging substitution (對比MCP3302T-CI/SL)
設計說明
Route the analog input traces as short as practical and place input and reference capacitors close to their associated device pins. Keep switching-node and high-current return paths away from the analog inputs. A single solid reference plane is preferable to splitting the ground plane, but analog and digital currents should still be arranged so that return currents do not flow beneath the sensitive input network.
Do not treat the maximum 100 ksps specification as the usable throughput for every signal source. Account for the sample-and-hold acquisition interval, source impedance, reference settling, conversion time, and SPI transfer time. When multiplexed inputs are sampled sequentially, allow each source to settle before starting the next conversion; otherwise channel-to-channel errors can exceed the expected code accuracy.
Reference noise and drift appear directly in the conversion result. Use a reference source appropriate for the required accuracy, place its bypass capacitor at the reference pin, and avoid routing the reference node beneath digital signals. For differential measurements, evaluate common-mode voltage, input bias current, source impedance, and differential input range against the electrical characteristics before selecting external resistor values and filtering.
Build the power budget from the converter's active current, reference current, digital-interface activity, and the duty cycle of the sampling cycle. Although the MCP3302 is intended for low-power acquisition, the complete analog front end may consume more energy than the ADC itself. Use the manufacturer operating-current characteristics and MCU sleep modes to estimate average consumption, then verify operation across the full supply-voltage range.
合規資訊
The manufacturer product information identifies the MCP3302 as an industrial-grade ADC. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status are not explicitly established by the manufacturer information used for this page.