MCP3001-I/SN - 10-Bit 200 kSPS SPI ADC | Microchip
MPN: MCP3001-I/SN ✓ ActiveMCP3001-I/SN Overview
An ADC converts an analog voltage into a numeric code for processing by a microcontroller, logic controller, or embedded system. The MCP3001 belongs to the SAR ADC hierarchy: successive approximation compares the sampled input against an internal reference and generates a 10-bit conversion result. Its pseudo-differential single input provides a simple interface for potentiometers, resistive sensors, dividers, and industrial control signals while reducing the component count compared with a multiplexed multi-channel converter.
Key features include 10-bit resolution, differential nonlinearity and integral nonlinearity specified at a maximum of ±1 LSB, an on-chip sample-and-hold circuit, and serial communication using SPI-compatible modes 0,0 and 1,1. A single 5.5 V supply simplifies power planning, while the 200 kSPS conversion rate supports rapid sensor acquisition and straightforward embedded sampling loops.
The MCP3001 uses a serial interface rather than a parallel data bus, reducing the number of connections required between the converter and host controller. Conversion results are shifted out through the combined clock/data pin, while chip select controls the serial transaction. This architecture suits compact control boards where pin availability, board area, and power consumption are more important than maximum channel count.
Typical applications include analog front-end conditioning, potentiometer position sensing, temperature or light sensor monitoring, battery-voltage measurement, and industrial embedded control. The 10-bit result provides 1,024 quantization steps, which is appropriate for many slow-changing control signals but may be insufficient for high-precision instrumentation without additional gain, averaging, or oversampling.
When designing around the MCP3001-I/SN, protect the analog input from transients, bypass the analog supply close to the device, and provide a stable reference voltage. Source impedance and acquisition time should be checked against the datasheet because settling errors can degrade the least significant bits. The SPI clock and chip-select timing must also satisfy the serial-interface specifications for reliable conversion completion.
This page consolidates distributor availability, verified electrical characteristics, same-footprint alternatives, package and temperature details, and practical PCB guidance for engineers evaluating the MCP3001-I/SN as a drop-in 8-SOIC ADC.
Drop-in alternatives for MCP3001-I/SN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
MCP3001T-I/SN
✅ Drop-In📋 Reference alternative (not in catalog)
MCP3001-I/ST
✅ Drop-InContact for price
View Datasheet →MCP3002-I/SN
✅ Drop-InContact for price
View Datasheet →MCP3004-I/SN
✅ Drop-In📋 Reference alternative (not in catalog)
MCP3008-I/SN
✅ Drop-In📋 Reference alternative (not in catalog)
MCP3001-I/SN Maximum Ratings & Electrical Characteristics
| Resolution | 10 bit |
| Number of Inputs | 1 input |
| Number of Channels | 1 channel |
| Architecture | Successive approximation register (SAR) |
| Sampling Rate | 200 kSPS |
| Data Interface | SPI serial interface |
| SPI Supported Modes | Mode 0,0 and mode 1,1 |
| Input Type | Single pseudo-differential input |
| Differential Nonlinearity | ±1 LSB maximum |
| Integral Nonlinearity | ±1 LSB maximum |
| Sample and Hold | On-chip |
| Supply Configuration | Single supply |
| Maximum Supply Voltage | 5.5 V |
| Operating Temperature | -40 °C to +85 °C |
| Package | 8-SOIC, 0.154 inch (3.90 mm) width |
| Mounting Type | Surface mount |
| Shipping Package | Tube |
| RoHS Status | Compliant per distributor product data |
| Analog Input Reference | 5.5 V maximum supply operation |
MCP3001-I/SN Pin Configuration
| Pin 1 | CS/SHDN — Chip-select active-low input and shutdown control |
| Pin 2 | DIN 0 — Analog input channel 0 |
| Pin 3 | DIN 1 — Analog input channel 1 reference |
| Pin 4 | VSS — Analog ground |
| Pin 5 | VREF — Positive analog reference input |
| Pin 6 | VAGND — Analog ground connection |
| Pin 7 | VDD — Positive analog supply input |
| Pin 8 | CLK/DOUT — SPI clock input and serial data output |
Typical Applications
MCP3001-I/SN is suitable for 6 applications: Industrial Potentiometer Position Sensing, Temperature and Light Sensor Monitoring, Battery Voltage Measurement, Embedded Control Signal Acquisition, Analog Sensor Interface Module, Test and Measurement Front End.
Industrial Potentiometer Position Sensing
The MCP3001-I/SN suits industrial potentiometer and rotary-control interfaces because its 10-bit SAR conversion provides 1,024 output levels and its 200 kSPS rate captures position changes with low latency. The single pseudo-differential input can be driven from a divider formed by the potentiometer and a stable reference. Place the divider wiper directly on the analog input, keep the source impedance low, and bypass the analog supply near pins 6 and 7. Compared with a continuous ramp generator, the MCP3001 performs a conversion only when requested, helping limit power use. Firmware should average several samples when mechanical noise or contact variation affects the wiper voltage.
Recommended
Temperature and Light Sensor Monitoring
The MCP3001-I/SN can acquire conditioned outputs from resistive temperature and light sensors without requiring a multi-channel converter. Its 200 kSPS sampling capability permits rapid polling, while the 10-bit result and ±1 LSB maximum DNL and INL suit sensors whose output resolution is measured in volts per degree or volts per lux. Buffer high-impedance sensor outputs when required, and scale the input into the converter's available range. Because only one pseudo-differential input is available, multiplexing the sensor before the ADC or selecting a multi-channel family member is necessary when several independent sensor voltages must be measured simultaneously.
Recommended
Battery Voltage Measurement
The MCP3001-I/SN provides a compact solution for measuring a divided battery voltage in portable or industrial equipment. Scale the pack voltage with a resistive divider so that the ADC input remains within the permitted analog range, then use the MCP3001's 200 kSPS conversion rate for fast state-of-charge sampling. The single-supply operation and 8-SOIC footprint minimize board area. Input impedance is important because the divider can appear as a source resistance to the sample-and-hold circuit; use a suitably low divider impedance or an input buffer. Include resistor tolerances in the error budget and refresh the reading when the load changes significantly.
Recommended
Embedded Control Signal Acquisition
The MCP3001-I/SN is appropriate for embedded control loops that read one analog command or feedback signal through SPI. Its SAR architecture provides deterministic sampling, and the 10-bit result gives adequate command resolution for many motor, valve, lighting, and process-control systems. The serial interface reduces the GPIO burden compared with a parallel ADC, which is valuable in compact embedded controllers. Configure the SPI clock within the manufacturer's timing limits and observe the required conversion-start and data-read sequence. If the controller must acquire several independent signals per control cycle, choose a multiplexed MCP3004-I/SN rather than adding external switching.
Recommended
Analog Sensor Interface Module
The MCP3001-I/SN works well as the conversion element of a small analog sensor interface module because it combines one pseudo-differential input, an on-chip sample-and-hold circuit, and SPI communication in an 8-SOIC package. Conditioning stages can scale and filter the sensor output before conversion, allowing the ADC to fit behind the connector rather than on the main controller board. Keep the analog trace short, isolate it from switching nodes, and return analog ground to the device's quiet ground reference. The 10-bit result is appropriate for many resistive sensors, but a higher-resolution converter should be selected when the sensor's useful signal occupies only a small part of the full-scale range.
Recommended
Test and Measurement Front End
The MCP3001-I/SN can serve as the acquisition section of a compact test front end when 10-bit resolution and 200 kSPS are sufficient. Use it to capture slow waveforms, dc levels, potentiometer outputs, or conditioned transducer signals while a host controller stores or processes the results over SPI. The device's serial interface simplifies connection to automated test equipment compared with a parallel bus. For accurate measurements, establish the full-scale reference relationship, calibrate offset and gain in firmware, and avoid source impedances that prevent the sample-and-hold circuit from settling. The MCP3001-I/SN is not the preferred choice for high-resolution laboratory instrumentation, where quantization error and reference accuracy would otherwise dominate the result.
Recommended
Recommended Products Summary
Engineering reference data for MCP3001-I/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCP3001T-I/SN | MCP3001-I/ST | MCP3002-I/SN | MCP3004-I/SN | MCP3008-I/SN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Architecture | Successive approximation register (SAR) | Successive approximation register (SAR) | Successive approximation register (SAR) | Successive approximation register (SAR) | Successive approximation register (SAR) | Successive approximation register (SAR) |
| Number of Analog Inputs | 1 input | 1 input | 1 input | 2 inputs | 4 inputs | 8 inputs |
| Sampling Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Data Interface | SPI, modes 0,0 and 1,1 | SPI | SPI | SPI | SPI | SPI |
| Temperature Grade | Industrial: -40 °C to +85 °C | Extended-temperature grade; limits require verification | Industrial: -40 °C to +85 °C | Industrial family variant | Industrial family variant | Industrial family variant |
| DNL and INL | ±1 LSB maximum for DNL and INL | ±1 LSB maximum for DNL and INL | ±1 LSB maximum for DNL and INL | ±1 LSB maximum for DNL and INL | ±1 LSB maximum for DNL and INL | ±1 LSB maximum for DNL and INL |
Key Differentiators
- Minimal one-channel conversion path for single-signal designs (vs MCP3004-I/SN)
- 200 kSPS acquisition rate with 10-bit resolution (vs MCP3002-I/SN)
- Specified low nonlinearity for embedded measurement (vs MCP3008-I/SN)
- Direct 5 V industrial-temperature operation (vs MCP3001-I/P)
Design Notes
Route the analog input directly from the sensor or divider to the MCP3001-I/SN, keeping the trace short and away from SPI clock and switching-node traces. Place the analog bypass capacitor at the supply pins and connect the analog ground return to the device ground reference using the layout recommended in the Microchip MCP3001 manufacturer datasheet. Because the ADC uses an on-chip sample-and-hold circuit, excessive source impedance can prevent settling to the specified accuracy. A 10-bit converter has only 1,024 code levels, so layout-induced error can consume a meaningful fraction of one least significant bit.
Do not begin an SPI read at an arbitrary clock phase; follow the manufacturer's conversion-start and output-code sequence, including the required clock-idle states for SPI mode 0,0 or mode 1,1. A common firmware error is to ignore the sample-and-hold acquisition interval and present an unstable input before the conversion result is latched. Verify the maximum SPI clock rate, chip-select behavior, and the delay between starting and reading a conversion in the datasheet. Also confirm that the input cannot exceed the supply limits during transients; add clamping when the sensor or divider can generate an overvoltage.
Provide a stable analog supply and reference, with local decoupling placed at the converter rather than at the distant system supply. The verified data confirms single-supply operation with a 5.5 V maximum and does not provide a lower-voltage limit, so validate that rail from the manufacturer datasheet before committing the design. Reference accuracy and supply drift contribute directly to code error because a 10-bit result represents one part of 1,024. If the system requires better absolute accuracy, calibrate gain and offset in firmware or use a higher-resolution converter when the sensor signal uses only a small fraction of the full-scale range.
Treat the combined CLK/DOUT connection as a bidirectional SPI signal and check host-firmware behavior during the conversion and output phases. Series damping close to the driver can help control clock ringing if the board is long or the load is capacitive, although the final value must be checked against the manufacturer's timing limits. Keep the analog and digital return paths arranged so converter current does not flow through sensitive input-reference traces. If several SPI peripherals share the bus, use chip select to isolate the MCP3001 transaction and verify that no device drives the shared data line while the ADC is being selected.
Compliance Information
RoHS compliance is reported in the supplied distributor comparison data for MCP3001-I/SN. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was included, so those fields remain unknown rather than assumed.
