MCP3201-BI/P - 12-Bit 100 kSPS SPI ADC | Microchip
MPN: MCP3201-BI/P ✓ פעילMCP3201-BI/P סקירה
An ADC is a data-conversion IC that transforms an analog voltage into a numeric value for processing by a microcontroller, DSP, or other digital controller. The MCP3201 belongs to the SAR ADC family, which samples an analog input with an internal sample-and-hold circuit and then performs a successive-approximation conversion. Its 12-bit resolution provides 4096 possible codes, while its SPI interface permits compact connection and straightforward digital readout.
Key features include 100 kSPS sampling, a single pseudo-differential input, and differential and integral nonlinearity ratings of ±1 LSB for the MCP3201-B version. The device supports SPI-compatible communication with chip select control. Its 8-pin PDIP package is easy to inspect, prototype, and replace during hardware development, although a surface-mount option may be preferable for compact production assemblies.
The SAR architecture provides predictable conversion behavior suitable for process monitoring, control loops, and low-frequency instrumentation. The integrated sample-and-hold circuitry simplifies analog front-end design, but system accuracy still depends on the reference voltage, input-source impedance, grounding, and PCB layout. The MCP3201-BI/P is a single-channel converter, so applications requiring several simultaneous measurements will need multiplexing or additional converters.
Typical applications include industrial sensor interfaces, potentiometer and thermistor measurement, process-control instrumentation, battery monitoring, embedded data logging, and general embedded-control boards. Its low-power operation and compact package are particularly useful when analog measurement must be added to a controller without using a higher-cost, higher-channel ADC.
For a reliable design, decouple the supply near the device, keep analog traces short and away from switching nodes, and use an input source with sufficiently low impedance for the selected sample rate. Verify the maximum input voltage against the supply level and use the manufacturer datasheet for the complete electrical characteristics and recommended application circuit.
חלופות תחליף ישיר עבור MCP3201-BI/P — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MCP3201-BI/P (אותו גורם צורה וטביעת רגל) — שונים ב Package, Mounting Type, Resolution, Supply Voltage Range, Architecture.
MCP3201-CI/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MCP3201-BI/SN
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MCP3201T-CI/SN
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MCP3201-CI/SN
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MCP3201-BI/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MCP3201-BI/P דירוגים מרביים ומאפיינים חשמליים
| Converter Type | Successive Approximation Register (SAR) ADC |
| רזולוציה | 12 bit |
| Number of Inputs | 1 single pseudo-differential input |
| קצב דגימה | 100 kSPS |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Differential Nonlinearity | ±1 LSB |
| Integral Nonlinearity | ±1 LSB (MCP3201-B) |
| ממשק | SPI-compatible serial interface |
| Sample-and-Hold | On-board sample-and-hold circuitry |
| Input Type | Pseudo-differential analog input |
| טמפרטורת פעולה | -40°C to +85°C |
| מארז | 8-pin PDIP |
| מספר פינים | 8 pins |
| סוג הרכבה | Through-hole |
| Screening Level | Industrial |
| Chip Select | CS-controlled serial transaction initiation |
| Input Voltage | -0.1 V to 4.9 V |
תצורת פינים של MCP3201-BI/P
| פין 1 | CS — Chip-select input for initiating SPI serial communication |
| פין 2 | DIN — Serial data input |
| פין 3 | DOUT — Serial data output |
| פין 4 | CLK — SPI clock input |
| פין 5 | VREF — Reference voltage input |
| פין 6 | VIN- — Negative pseudo-differential analog input |
| פין 7 | VIN+ — Positive pseudo-differential analog input |
| פין 8 | VDD/VSS — Positive supply and ground reference connection |
יישומים טיפוסיים
MCP3201-BI/P מתאים עבור 6 יישוםs: Industrial Sensor Interface, Process Control Instrumentation, Thermistor and Potentiometer Measurement, Battery Voltage Monitoring, Embedded Data Logging, Audio and Control Signal Capture.
Industrial Sensor Interface
The MCP3201-BI/P suits industrial sensor interfaces that need a compact 12-bit reading without a high-channel-count converter. Its 100 kSPS rate and on-board sample-and-hold circuitry allow the SPI controller to acquire sensor voltages efficiently, while the -40°C to +85°C industrial range supports equipment operating beyond typical consumer conditions. According to the Microchip Technology MCP3201 manufacturer datasheet, differential nonlinearity is ±1 LSB and the MCP3201-B integral nonlinearity is also ±1 LSB. Use short analog routing, a stable reference, and a sufficiently low-impedance sensor amplifier to preserve that accuracy. The tradeoff is one pseudo-differential channel, so synchronized multi-sensor systems require additional converters or an external multiplexer.
מומלץ
Process Control Instrumentation
The MCP3201-BI/P is a practical front-end for process-control measurements such as pressure, level, or temperature signals that have already been conditioned. Its 12-bit resolution creates 4096 code levels, and the 100 kSPS conversion rate supports responsive closed-loop monitoring without excessive sampling delay. According to the Microchip Technology MCP3201 manufacturer datasheet, the MCP3201-B version offers ±1 LSB integral nonlinearity and the device includes sample-and-hold circuitry. Place the converter close to the analog source and keep switching-node traces away from the input to minimize conversion errors. For higher accuracy, low drift, or simultaneous measurement, the ADS8320E/2K5 or a multi-channel converter may be a better architectural choice.
מומלץ
Thermistor and Potentiometer Measurement
The MCP3201-BI/P is well matched to thermistor, RTD-conditioning, and potentiometer measurements that present a slowly changing analog voltage. The 12-bit SAR ADC can provide 4096 levels, while its 100 kSPS capability is more than adequate for typical thermal monitoring and control loops. According to the Microchip Technology MCP3201 manufacturer datasheet, the converter has an on-board sample-and-hold circuit and ±1 LSB differential nonlinearity. A resistor divider or current-source network establishes the analog range, and the source impedance should be verified against the selected sampling rate. If a fixed, high-accuracy voltage-to-digital conversion is preferred, the ADS8320E/2K5 provides a higher-resolution alternative.
מומלץ
Battery Voltage Monitoring
The MCP3201-BI/P can measure a divided battery voltage in embedded systems where 12-bit resolution and a 100 kSPS rate are sufficient. The verified input range of -0.1 V to 4.9 V means that higher battery voltages require an appropriately scaled divider and input protection. According to the Microchip Technology MCP3201 manufacturer datasheet, the B-grade converter is specified at ±1 LSB integral nonlinearity, providing a useful baseline for state-of-charge tracking. Use a stable reference and carefully selected divider resistors to limit temperature-induced error. For precision pack-voltage measurement, the ADS8320E/2K5 offers more resolution, while the MCP3201-BI/P favors simplicity and lower component count.
מומלץ
Embedded Data Logging
The MCP3201-BI/P is suitable for embedded data logging when a controller must periodically capture an analog measurement through a compact SPI interface. The 12-bit SAR architecture and 100 kSPS rate support routine logging of environmental, actuator, or supply telemetry. According to the Microchip Technology MCP3201 manufacturer datasheet, the device supports an SPI-compatible serial interface with chip-select transaction control, making software integration straightforward. Its one-channel limitation must be considered when logging several signals; an external analog multiplexer can expand channel count but may require additional acquisition time and careful settling. The 8-pin PDIP package also simplifies prototype debugging and replacement.
מומלץ
Audio and Control Signal Capture
The MCP3201-BI/P can capture slow control or monitoring signals in audio-adjacent equipment, although it is not intended as a high-bandwidth audio converter. Its 12-bit resolution and 100 kSPS sampling rate are appropriate for slow level, calibration, or bias measurements. According to the Microchip Technology MCP3201 manufacturer datasheet, the MCP3201-B grade provides ±1 LSB integral nonlinearity, and on-board sample-and-hold circuitry simplifies the input stage. For high-rate waveform acquisition, the AD9238BSTZ-40 or AD9280ARSZ offers a substantially different, higher-bandwidth architecture. Use the MCP3201-BI/P when slow control-value capture and component simplicity matter more than waveform fidelity.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MCP3201-BI/P — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MCP3201-CI/P | MCP3201-BI/SN | MCP3201T-CI/SN | MCP3201-CI/SN | MCP3201-BI/P |
|---|---|---|---|---|---|---|
| Package | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS |
| Input Channels | 1 pseudo-differential input | 1 pseudo-differential input | 1 pseudo-differential input | 1 pseudo-differential input | 1 pseudo-differential input | 1 pseudo-differential input |
| Integral Nonlinearity | ±1 LSB (B grade) | ±2 LSB (C grade) | ±1 LSB (B grade) | ±2 LSB (C grade) | ±2 LSB (C grade) | ±1 LSB (B grade) |
| Differential Nonlinearity | ±1 LSB | ±1 LSB | ±1 LSB | ±1 LSB | ±1 LSB | ±1 LSB |
| Serial Interface | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible |
מבדילים עיקריים
- B-grade nonlinearity specification (לעומתMCP3201-CI/P)
- Verified 100 kSPS conversion rate (לעומתMCP3201-CI/P)
- Single pseudo-differential input with integrated sample-and-hold (לעומתMCP3201-BI/SN)
- Compact SPI-compatible integration (לעומתMCP3201T-CI/SN)
הערות תכנון
Route the analog input directly from the sensor or conditioning stage to MCP3201-BI/P pins, and keep the path away from SPI clock, digital return currents, and switching-converter nodes. Place the device's recommended bypass components close to their supply and reference pins. According to the Microchip Technology MCP3201 manufacturer datasheet, the converter uses on-board sample-and-hold circuitry, but external layout still determines how faithfully the source voltage reaches that sampling network.
Do not treat the pseudo-differential input as a fully differential amplifier input or exceed the verified -0.1 V to 4.9 V input range. The MCP3201-BI/P has only one measurement channel, and its conversion accuracy depends on the reference and input-source behavior. Verify that the sensor amplifier can charge the sampling network within the selected acquisition cycle and use the manufacturer datasheet for the exact reference and decoupling requirements.
Keep SPI clock routing short and use a defined ground reference between the ADC and controller. According to the Microchip Technology MCP3201 manufacturer datasheet, communication begins when CS goes low, so the firmware must hold CS low only for the required conversion and readout transaction. Proper CS handling prevents unintended frame boundaries and reduces digital coupling into the analog measurement.
The MCP3201-BI/P supports a 2.7 V to 5.5 V supply range, but the system reference must be compatible with both the ADC and the analog signal range. Do not assume that the listed 4.9 V maximum input applies independently of the selected supply. Derive the external divider, clamp, and reference limits so that worst-case tolerance, temperature drift, and transients remain within the manufacturer datasheet limits.
מידע על תאימות
The supplied excerpts identify an industrial-temperature MCP3201-BI/P but do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because this is an ADC rather than an automotive-qualified device.