MCP3301-CI/SN - 13-Bit Low-Power SPI ADC | Microchip Technology
Артикул: MCP3301-CI/SN ✓ АктивенMCP3301-CI/SN Обзор
An analog-to-digital converter is an interface IC that converts a continuous analog voltage into a numeric value for processing, storage, or transmission. The MCP3301 belongs to the successive-approximation ADC hierarchy, which repeatedly compares the input against an internal DAC until its output matches the analog voltage. A differential ADC measures the voltage between two inputs, allowing common-mode voltage to be rejected when the source is balanced around a common return or reference.
The converter supports a 4.5 V to 5.5 V supply range and can perform conversions at up to 100 ksps. Its reference voltage can be varied from 400 mV to 5 V. As a result, the input-referred resolution ranges from 98 µV with a 400 mV reference to 1.22 mV with a 5 V reference. The ±1 LSB maximum differential nonlinearity and ±2 LSB maximum integral nonlinearity identified for the -C version characterize the converter’s transfer accuracy.
The SPI interface provides a familiar connection to microcontrollers, and the converter can remain in a low-current standby state between measurements. The single differential channel is appropriate for bridge sensors, current-shunt measurements, battery monitoring, temperature sensing, and other systems where preserving signal polarity and rejecting common-mode disturbance are important. The small 8-pin SOIC package also simplifies compact analog acquisition boards.
Typical uses include low-power environmental sensors, industrial pressure and temperature acquisition, portable instrumentation, remote telemetry, and precision analog measurement. The 100 ksps rate supports faster measurement loops than a low-speed meter-oriented ADC while retaining the simplicity of a one-channel converter.
Designers should select the reference and input ranges carefully because the usable differential voltage must remain within the reference-defined conversion range. Input and reference routing should be short and symmetric to minimize conversion error and noise pickup. When the source is not differential, a suitable signal-conditioning circuit may be required to translate its output into the converter’s differential input range.
This product page combines the manufacturer’s operating limits, conversion characteristics, pin assignment, application guidance, package details, and same-footprint family options to support faster component selection and PCB planning.
Аналоги без доработки для MCP3301-CI/SN — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
MCP3301-I/SN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MCP3301-C/SN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MCP3201-I/SN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MCP3201-CI/SN
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →MCP3204-I/SN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MCP3301-CI/SN Максимальные параметры и электрические характеристики
| Converter Type | Successive-approximation ADC |
| Разрешение | 13 bit |
| Input Configuration | 1 differential input |
| Conversion Rate | Up to 100 ksps |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Reference Voltage Range | 400 mV to 5 V |
| Input-Referred Resolution at 400 mV Reference | 98 µV |
| Input-Referred Resolution at 5 V Reference | 1.22 mV |
| Active Current | 300 µA typical |
| Standby Current | 50 nA typical |
| Differential Nonlinearity | ±1 LSB maximum |
| Integral Nonlinearity for -C Version | ±2 LSB maximum |
| Digital Interface | SPI serial interface |
| Корпус | 8-pin SOIC |
| Тип монтажа | Surface mount |
Конфигурация выводов MCP3301-CI/SN
| Контакт 1 | CS — Chip-select input for SPI communication |
| Контакт 2 | DIN+ — Positive differential analog input |
| Контакт 3 | DIN- — Negative differential analog input |
| Контакт 4 | VSS — Ground reference |
| Контакт 5 | VDD — Positive analog supply input |
| Контакт 6 | VREF+ — Positive reference input |
| Контакт 7 | VREF- — Negative reference input |
| Контакт 8 | DOUT — Serial data output |
Типичное применение
MCP3301-CI/SN подходит для 6 применениеs: Battery-Powered Environmental Sensing, Industrial Pressure Sensor Interface, Portable Current-Shunt Measurement, Remote Data-Acquisition Terminal, Precision Temperature Acquisition, Audio Control and Monitoring.
Battery-Powered Environmental Sensing
The MCP3301-CI/SN fits battery-powered environmental monitoring because its typical active current is 300 µA and standby current is 50 nA. The 13-bit converter can acquire a differential sensor signal through DIN+ and DIN− while its SPI interface connects cleanly to a low-power microcontroller. A 4.5 V to 5.5 V operating range supports regulated 5 V rails derived from primary cells or battery packs, while the 400 mV to 5 V reference range accommodates low-level temperature, humidity, or gas-sensor outputs. The design trade-off is that differential sensing is most accurate with a balanced source and properly referenced return path.
Рекомендуется
Industrial Pressure Sensor Interface
The MCP3301-CI/SN is suitable for conditioning a differential pressure or bridge sensor because its single differential input rejects common-mode voltage and preserves signal polarity. Its 13-bit resolution provides 8192 codes across the selected reference range, and the 100 ksps conversion capability permits more rapid sampling than a slow meter-oriented converter. Place the converter in an 8-pin SOIC footprint and connect the sensor differentially to DIN+ and DIN−. The principal design considerations are keeping the input traces balanced, selecting a reference that matches the sensor’s full-scale output, and protecting the analog inputs when field wiring is connected.
Рекомендуется
Portable Current-Shunt Measurement
The MCP3301-CI/SN can measure the differential voltage produced by a current shunt without requiring the shunt voltage to be referenced to ground. Its 13-bit resolution, ±1 LSB maximum differential nonlinearity, and differential input architecture support accurate low-level measurements. With a 400 mV reference, the converter offers 98 µV input-referred resolution, which is useful for high-side or low-side shunt amplifiers with limited output range. The 300 µA active current also limits the converter’s contribution to overall portable-system consumption. Correct shunt placement, Kelvin-style routing, and a low-noise reference are essential for translating code accuracy into meaningful current accuracy.
Рекомендуется
Remote Data-Acquisition Terminal
The MCP3301-CI/SN works in remote telemetry and data-acquisition terminals where each node must acquire an analog measurement with limited power and board area. Its 8-pin SOIC package is compact, its 100 ksps rate supports rapid sampling bursts, and its SPI interface allows a microcontroller or serial gateway to retrieve conversion results efficiently. The 50 nA standby current is particularly useful when duty-cycled acquisition dominates the operating profile. Design the reference and analog input paths to avoid long, high-impedance traces, and ensure the digital clock and SPI lines do not couple switching or fast-edge noise into DIN+ and DIN− during each conversion.
Рекомендуется
Precision Temperature Acquisition
The MCP3301-CI/SN can digitize the low-level differential output of resistive temperature sensors, RTDs, or linearized bridge stages. Its 13-bit resolution and selectable 400 mV to 5 V reference range allow the measurement scale to be matched closely to the sensor output, reducing unused ADC range. Differential input reduces errors from supply variation and parasitic common-mode voltage, while the 100 ksps conversion rate supports multiple readings for filtering and sensor-lead compensation. The analog front end should include suitable excitation and conditioning, and the PCB should keep the reference and sensor paths away from high-current switching paths.
Рекомендуется
Audio Control and Monitoring
The MCP3301-CI/SN is suitable for slow control or monitoring measurements within audio equipment, such as gain-control feedback, supply monitoring, or an analog system-control node. Its differential input can capture a bipolar or bidirectional signal when the analog circuitry establishes the proper common-mode range, and 13-bit resolution provides adequate granularity for many supervisory measurements. The SPI interface allows control data and conversion commands to share a compact digital bus. Because this is not a dedicated audio-resolution converter, high-fidelity waveform capture should not be inferred; its role is better suited to control-loop monitoring than critical signal-path conversion.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MCP3301-CI/SN — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MCP3301-I/SN | MCP3301-C/SN | MCP3201-I/SN | MCP3201-CI/SN | MCP3204-I/SN |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Resolution | 13 bit | 13 bit | 13 bit | 12 bit | 12 bit | 12 bit |
| Converter Architecture | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC |
| Conversion Rate | Up to 100 ksps | Up to 100 ksps | Up to 100 ksps | Up to 100 ksps | Up to 100 ksps | Up to 100 ksps |
| Input Configuration | 1 differential input | 1 differential input | 1 differential input | 1 differential input | 1 differential input | 4 differential or 8 single-ended inputs |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V |
| Reference Voltage Range | 400 mV to 5 V | 400 mV to 5 V | 400 mV to 5 V | 400 mV to 5 V | 400 mV to 5 V | 400 mV to 5 V |
| Digital Interface | SPI | SPI | SPI | SPI | SPI | SPI |
Ключевые отличия
- Higher conversion resolution than MCP3201-family choices (против MCP3201-I/SN)
- Focused one-channel differential acquisition (против MCP3204-I/SN)
- Low-power operation for portable acquisition (против MCP3301-C/SN)
Заметки по проектированию
Route DIN+ and DIN− as a closely spaced differential pair and connect the IC-side ground to the source return at the quietest available point. Long parallel runs through switching regions can convert common-mode noise into differential error. Place the reference bypass capacitor directly beside VREF+ and VREF−, and keep the analog input and reference loops physically separated from SPI clock and digital output traces.
Choose the reference voltage so the expected differential input uses most of the conversion range without exceeding its limits. A 400 mV reference gives 98 µV input-referred resolution, while a 5 V reference gives 1.22 mV. Because resolution is reference-dependent, a small reference can improve code density for low-level signals, but reference noise, drift, and source impedance must also be controlled to preserve real measurement accuracy.
Do not treat the differential input pins as interchangeable with a single-ended ADC input. DIN+ and DIN− define the measured voltage, and both nodes must remain within their permitted common-mode range. Also verify conversion timing before reading DOUT. SPI traffic can appear on adjacent digital traces, so a slow clock or unsuitable layout can degrade effective accuracy even when the converter’s intrinsic DNL and INL meet the specified limits.
Информация о соответствии
The manufacturer datasheet and product materials available for this record do not explicitly state the requested environmental and automotive compliance classifications.
