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Microchip Technology MCP3001-I/ST
- Part No.:
- MCP3001-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP3001-I/ST.pdf
- Description:
- IC ADC 10BIT SAR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
MCP3001-I/ST from Microchip Technology Inc. is a 10-bit successive approximation analog-to-digital converter (ADC) with on-chip sample-and-hold, SPI™ serial interface (modes 0,0 and 1,1), ±1 LSB max INL/DNL, 200 ksps sampling rate at 5V, and single pseudo-differential input - used for precision sensor signal digitization in industrial data acquisition systems.
For engineers reviewing the MCP3001-I/ST datasheet, MCP3001-I/ST pinout, MCP3001-I/ST application, or MCP3001-I/ST equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world timing behavior, and validated alternative options for embedded analog front-end design.
Technical Context
The MCP3001-I/ST implements a conventional SAR architecture with internal 20 pF sample-and-hold capacitor, requiring 1.5 clock cycles for analog acquisition before 10-bit conversion. It uses straight-binary output coding and supports only MSB-first or LSB-first readout via 3-wire SPI-compatible protocol.
Its pseudo-differential input accepts IN+ from IN− to VREF + IN−, while IN− is constrained to ±100 mV relative to VSS - enabling common-mode noise rejection without full differential amplifier overhead. Reference voltage (VREF) directly sets LSB size (VREF/1024) and full-scale range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes over full-scale input range |
| INL / DNL | ±1 LSB max - guarantees monotonicity and no missing codes across temperature |
| Sampling Rate | 200 ksps at 5V / 75 ksps at 2.7V - defines maximum continuous conversion throughput |
| Supply Range | 2.7V to 5.5V - enables direct interfacing with 3.3V or 5V microcontroller I/O domains |
| Standby Current | 5 nA typical - allows ultra-low-power wake-on-event sensing in battery-operated systems |
| SPI Compatibility | Modes 0,0 and 1,1 - matches standard MCU SPI peripherals without custom clock polarity/inversion logic |
| Reference Input | VREF = 0.25V to VDD - sets full-scale range and LSB weight; draws ≤150 µA at VDD = 5V |
Pinout & Package
The MCP3001-I/ST is housed in an 8-pin TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), pin-compatible with PDIP, SOIC, and MSOP variants per Microchip's package family documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive power supply | Accepts 2.7–5.5V; powers internal SAR logic, reference buffer, and digital interface |
| VSS | Ground reference | Return path for analog and digital circuits; must be low-impedance to minimize noise coupling |
| IN+ | Positive analog input | Pseudo-differential input ranging from IN− to (VREF + IN−); sampled onto 20 pF internal capacitor |
| IN− | Negative analog input | Common-mode reference limited to ±100 mV from VSS; enables rejection of shared noise on IN+/IN− |
| CLK | Serial clock input | Drives sampling initiation and bit-shift timing; max 2.8 MHz at 5V, 1.05 MHz at 2.7V |
| DOUT | Serial data output | Outputs conversion result on falling edge; high-impedance when CS is high or during null-bit phase |
| CS/SHDN | Chip select / shutdown | Active-low enable; pulls device into 5 nA standby when high between conversions |
| VREF | Reference voltage input | Sets full-scale range (LSB = VREF/1024); requires stable low-noise source or bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| On-chip sample-and-hold | Eliminates need for external S/H circuitry; acquires analog signal in 1.5 clock cycles |
| Low-power CMOS design | 400 µA active current at 5V and 200 ksps enables long-life operation from coin-cell or Li-ion sources |
| Pseudo-differential input | Rejects common-mode noise up to ±100 mV on IN− without requiring matched external resistors |
| Industrial temperature range | Specified from −40°C to +85°C - suitable for uncontrolled environments like factory floor sensors |
| Single-supply operation | Operates from same 2.7–5.5V rail as many MCUs and sensors - simplifies power architecture |
Applications
| Temperature Monitoring System | Industrial Pressure Transmitter |
|---|---|
|
Use Scenario: Digitizing thermistor or RTD voltage outputs in HVAC controllers and environmental loggers. IC Role / Device Role / Timing Role: ADC front-end converting millivolt-level analog signals to 10-bit digital values synchronized to MCU SPI clock. Use Value: ±1 LSB INL ensures accurate temperature resolution down to 0.1°C over full industrial range without calibration drift. |
Use Scenario: Converting bridge-sensor outputs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Low-power, single-supply ADC capturing conditioned sensor signals with minimal board space. Use Value: 5 nA standby current extends battery life in wireless field devices; TSSOP package fits compact transmitter housings. |
| Portable Data Logger | Motor Control Feedback Circuit |
|
Use Scenario: Sampling multiple analog sensor channels (voltage, current, humidity) in handheld diagnostic tools. IC Role / Device Role / Timing Role: SPI-configurable ADC providing deterministic 200 ksps throughput for burst-mode logging. Use Value: MSB-first SPI output aligns with standard 8-bit MCU shift registers - reduces firmware overhead and buffer management. |
Use Scenario: Capturing current-sense amplifier outputs for closed-loop motor phase current regulation. IC Role / Device Role / Timing Role: High-speed analog digitizer interfaced directly to motor control MCU via dedicated SPI bus. Use Value: 200 ksps sampling at 5V supports >10 kHz current loop bandwidth; ±1 LSB DNL prevents torque ripple from quantization error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP3002-I/SN | Dual-channel version with same 10-bit resolution, INL/DNL, and SPI interface; adds channel select logic | Supports two independent analog inputs - eliminates need for external multiplexer in multi-sensor systems | Select MCP3002-I/SN when simultaneous or interleaved sampling of two signals is required; pinout differs (10-pin SOIC) |
| ADS7822U | 12-bit resolution, higher THD (-80 dB), but higher 1.2 mA active current and narrower 2.7–3.6V supply range | Better dynamic performance for audio or vibration sensing; unsuitable for 5V-only systems or ultra-low-power use | Choose ADS7822U when SNR >70 dB is critical and power budget allows >200× higher active current than MCP3001-I/ST |
Compared with MCP3002-I/SN, the MCP3001-I/ST offers lower cost and smaller footprint for single-input designs; versus ADS7822U, it trades resolution and AC performance for 240× lower standby current and broader supply compatibility - making it optimal for battery-constrained industrial sensing.
Availability
MCP3001-I/ST is available at Aetrix Electronics and suitable for sensor interface, process control, and battery-operated systems requiring stable component supply, guaranteed long-term sourcing, and full traceability.
Supply support for MCP3001-I/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The MCP3001-I/ST belongs to Microchip's precision analog product line, designed specifically for low-power, single-supply data acquisition in space- and energy-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by the MCP3001-I/ST?
The MCP3001-I/ST supports up to 2.8 MHz clock frequency at VDD = 5V and 1.05 MHz at VDD = 2.7V. Exceeding these limits risks setup/hold violations and invalid data output. Clock timing must also satisfy minimum pulse width requirements: tHI/tLO ≥160 ns. These constraints ensure reliable sampling and conversion integrity across the full industrial temperature range.
Does the MCP3001-I/ST require an external reference voltage?
Yes, the MCP3001-I/ST requires an external reference voltage applied to the VREF pin. It accepts VREF from 0.25V to VDD, and the LSB size is calculated as VREF/1024. While the device does not include an internal reference, its low 150 µA VREF current draw allows direct connection to precision external references like the MCP1525 or REF3025 without buffering.
How does the pseudo-differential input of the MCP3001-I/ST improve noise immunity?
The MCP3001-I/ST pseudo-differential input uses IN− as a common-mode reference point, allowing rejection of noise present equally on both IN+ and IN−. Since IN− is restricted to ±100 mV around VSS, it effectively cancels low-frequency interference such as ground bounce or supply ripple - improving effective resolution without requiring a full differential amplifier stage.
Can the MCP3001-I/ST operate from a 3.3V supply?
Yes, the MCP3001-I/ST operates fully across 2.7V to 5.5V, including standard 3.3V logic rails. At 3.3V, it achieves ~120 ksps sampling rate (interpolated from 75 ksps at 2.7V and 200 ksps at 5V) and maintains ±1 LSB INL/DNL. Its VIH/VIL thresholds scale with VDD, ensuring robust SPI communication with 3.3V microcontrollers.
What is the function of the CS/SHDN pin on the MCP3001-I/ST?
The CS/SHDN pin on the MCP3001-I/ST serves dual roles: pulling it low initiates conversion and enables SPI communication, while pulling it high terminates conversion and places the device in 5 nA standby mode. It must be held high between conversions to guarantee proper power-down behavior and prevent leakage-induced measurement errors.
MCP3001-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3001-I/ST FAQ
1.How can I place an order for MCP3001-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3001-I/ST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP3001-I/ST reliable?
The price and inventory of MCP3001-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3001-I/ST is usually 5 days.
3.What payment methods are accepted for MCP3001-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3001-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3001-I/ST?
MCP3001-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3001-I/ST order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP3001-I/ST?
For technical support, including MCP3001-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3001-I/ST requirements.
6.How does Aetrix verify that MCP3001-I/ST is sourced from the original manufacturer or authorized distributors?
All MCP3001-I/ST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP3001-I/ST meets industry standards.
7.What is the process for return or replacement of MCP3001-I/ST?
All MCP3001-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP3001-I/ST, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP3001-I/ST part is unused and in its original packaging.
Return procedure for MCP3001-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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