MCP3201-CI/SN - 12-Bit 100ksps SAR ADC | Microchip
MPN: MCP3201-CI/SN ✓ نشطMCP3201-CI/SN نظرة عامة
An ADC is an interface component that converts an analog voltage into a digital value for processing by a microcontroller or other embedded controller. The MCP3201 belongs to the SAR ADC, analog-to-digital converter, data-converter, and semiconductor hierarchies. Its 12-bit resolution provides 4096 discrete codes, while the sample-and-hold circuit allows the input voltage to remain stable during successive-approximation conversion.
Key characteristics include a 100 ksps maximum sampling rate, ±1 LSB differential nonlinearity, and ±2 LSB integral nonlinearity for the C-grade device. The industrial-temperature option operates from -40°C to +85°C. Its SPI interface supports connection to PIC microcontrollers and other SPI-capable embedded systems, while its single pseudo-differential input simplifies acquisition of signals referenced to the converter ground.
Internally, the converter uses successive approximation rather than a continuous conversion architecture. A sample-and-hold stage captures the input, and the SPI command sequence initiates and controls the conversion. The digital result is transferred over the serial interface, reducing the number of signal traces required compared with a parallel ADC. The C-grade accuracy grade should be considered when selecting between the C and B device versions for a precision-sensitive design.
Typical uses include industrial process-control instrumentation, battery-powered embedded measurement, temperature or pressure sensor acquisition, laboratory equipment, and low-cost data-acquisition systems. The single input is appropriate when one analog quantity must be measured at a time. For applications requiring several simultaneous or multiplexed channels, an ADC with more channels may be more appropriate.
Design the analog input path to keep source impedance and signal settling within the converter's sampling requirements. Place input bypass and reference-decoupling capacitors close to their associated pins, maintain a clean return path, and use a stable voltage reference. The SPI clock and digital traces should be kept away from the analog input to minimize conversion disturbance.
This product page combines manufacturer specifications, package details, sourcing information, drop-in alternatives, comparison parameters, and application-specific design guidance to support component selection and PCB implementation.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MCP3201-CI/SN (نفس عامل الشكل والبصمة) — يختلف في Package, Mounting Type, Operating Temperature, Converter Type, Input Type.
MCP3201-BI/SN
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MCP3202-BI/SN
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MCP3201T-BI/SN
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MCP3201-CI/SN الحدود القصوى والخصائص الكهربائية
| Converter Type | Successive Approximation Register (SAR) |
| الدقة | 12 bit |
| Number of Channels | 1 channel |
| Input Type | Single pseudo-differential input |
| Sample Rate | 100 kSamples/s |
| جهد التغذية | 2.7 V |
| نطاق جهد الدخل | -0.1 V to 4.9 V |
| Differential Nonlinearity | ±1 LSB |
| Integral Nonlinearity | ±2 LSB for C grade |
| Serial Interface | SPI |
| Sample-and-Hold | On-board |
| درجة حرارة التشغيل | -40°C to +85°C |
| Screening Level | Industrial |
| العلبة | 8-pin SOIC |
| عدد الأطراف | 8 pins |
| نوع التركيب | Surface mount |
تكوين أطراف MCP3201-CI/SN
| دبوس 1 | CS — Active-low chip-select input |
| دبوس 2 | DIN — Serial data input |
| دبوس 3 | SCLK — Serial clock input |
| دبوس 4 | VSS — Ground reference |
| دبوس 5 | VREF+ — Positive reference input |
| دبوس 6 | VREF- — Negative reference input |
| دبوس 7 | VIN+ — Positive analog input |
| دبوس 8 | VIN- — Negative analog input |
التطبيقات النموذجية
MCP3201-CI/SN مناسب لـ 6 التطبيقs: Industrial Process Measurement, Temperature and Pressure Sensor Interface, Battery-Powered Data Acquisition, Laboratory and Test Equipment, Potentiometer and Resistive Sensor Reading, Embedded Control Systems.
Industrial Process Measurement
The MCP3201-CI/SN fits single-channel industrial process measurement because it combines a 12-bit SAR converter, 100 kSamples/s sampling rate, and an operating temperature range of -40°C to +85°C. Place the converter behind the sensor-conditioning stage and use its pseudo-differential input to reduce sensitivity to common-mode voltage on the measurement path. The C grade specifies ±2 LSB INL, so the acquisition system must account for that accuracy contribution when defining the overall measurement error. A stable reference and short analog traces are important because reference variation and ground-current coupling can degrade the apparent resolution.
موصى به
Temperature and Pressure Sensor Interface
The MCP3201-CI/SN is appropriate for digitizing conditioned temperature or pressure sensor outputs when a 12-bit result is more useful than a microcontroller's internal ADC. Its on-board sample-and-hold function supports acquisition of slowly changing sensor signals, while the 100 kSamples/s capability provides additional bandwidth for filtered measurements. Use a ratiometric or precision reference when required by the sensor, and verify that the source impedance and acquisition network settle adequately during each conversion. This arrangement is common in compact instrumentation where an analog sensor and a digital controller share the same board.
موصى به
Battery-Powered Data Acquisition
The MCP3201-CI/SN supports low-power embedded data acquisition because it combines a 2.7 V operating supply with a compact 8-pin SOIC package and serial digital output. It can wake periodically, acquire an analog measurement, and transfer the 12-bit code over SPI instead of requiring a parallel bus. Power-system design should account for converter operating current, reference current, and the state of the SPI pins during idle periods. For battery-powered products, select a reference and sensor interface that remain within the converter's input range and avoid unnecessary always-on analog circuitry.
موصى به
Laboratory and Test Equipment
The MCP3201-CI/SN can serve as an analog measurement front end in compact laboratory instruments, waveform testers, and calibration equipment. The 12-bit resolution yields 4096 codes, while the 100 kSamples/s SAR conversion rate supports periodic measurements without requiring the continuous sampling architecture of a flash converter. The C-grade ±2 LSB INL specification should be included in calibration-error budgets, and the analog input must be protected against transients outside the operating range. Stable references, grounded guard structures, and careful isolation between sensitive and switching circuits improve measurement repeatability.
موصى به
Potentiometer and Resistive Sensor Reading
The MCP3201-CI/SN is well suited to measuring a potentiometer or resistive sensor when the design needs more resolution than an internal controller ADC provides. Its single pseudo-differential input can monitor a voltage generated by a resistor divider while the SPI interface returns the 12-bit result to the controller. Accurate readings depend on excitation stability, reference quality, and preventing leakage from the resistive sensor. Place the resistive network near the input and avoid routing digital clock traces beneath the analog network. A slow-changing sensor can use averaging or digital filtering, provided the resulting response time still satisfies the application.
موصى به
Embedded Control Systems
The MCP3201-CI/SN adds a dedicated 12-bit analog input to embedded control systems that already use SPI. Its 100 kSamples/s conversion capability is suitable for supervisory control loops, actuator feedback, and supervisory measurement channels. Because the MCP3201 provides one pseudo-differential input, applications requiring many channels should use multiplexing or a higher-channel-count converter. Firmware must initiate each conversion, supply the required clocking, and read the correct output word. The SPI bus should be arranged so the ADC chip-select remains inactive while other SPI devices communicate.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MCP3201-CI/SN — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MCP3201-BI/SN | MCP3202-BI/SN | MCP3201T-BI/SN |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit |
| Input Channels | 1 channel | 1 channel | 2 channels | 1 channel |
| Sampling Rate | 100 kSamples/s | 100 kSamples/s | 100 kSamples/s | 100 kSamples/s |
| Integral Nonlinearity | ±2 LSB for C grade | ±1 LSB for B grade | ±1 LSB for B grade | ±1 LSB for B grade |
| Serial Interface | SPI | SPI | SPI | SPI |
| Operating Temperature | -40°C to +85°C | Industrial temperature grade | Industrial temperature grade | Industrial temperature grade |
أبرز الفروقات
- Single-channel 8-pin SOIC implementation (مقابلMCP3202-BI/SN)
- Same-family C-grade accuracy option (مقابلMCP3201-BI/SN)
- 100 kSamples/s SAR acquisition (مقابلMCP3201T-BI/SN)
ملاحظات التصميم
Place the VREF+ and VREF- bypass capacitors immediately adjacent to their pins, with short and symmetrical return paths to VSS. Keep the VIN+ and VIN- traces away from SCLK, DIN, and CS. Because the converter has a single pseudo-differential input, the negative input still requires a deliberate connection according to the application circuit; do not assume it is an unused pin.
Drive SCLK only while CS is asserted and keep chip-select inactive for other devices sharing the SPI bus. Route clock and data traces away from the analog input and reference nodes. If the analog source has high impedance, verify settling during the acquisition interval rather than assuming the 100 kSamples/s headline rate guarantees accuracy for every source network.
Account for the C-grade ±2 LSB integral nonlinearity when calculating measurement uncertainty. Do not treat the 12-bit resolution as guaranteed effective precision without considering INL, DNL, reference error, noise, and analog-front-end errors. Also confirm the full operating input range and reference arrangement against the manufacturer datasheet before connecting sensor outputs.
Use the 8-pin SOIC land pattern with an uninterrupted ground path and adequate copper for signal-integrity and temperature performance. The ADC is not a high-power component, but its accuracy can still shift with reference and ambient-temperature changes. For precision systems, evaluate the complete analog chain across the -40°C to +85°C operating range rather than relying only on the converter's nominal resolution.
معلومات الامتثال
The industrial-temperature grade and 8-pin SOIC package are documented, but no target-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was confirmed. AEC-Q100 is not applicable to this industrial-grade ADC.
