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Microchip Technology MCP3201-CI/SN
- Part No.:
- MCP3201-CI/SN
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MCP3201-CI/SN.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,883
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Product details
Overview
MCP3201-CI/SN from Microchip Technology Inc. is a 12-bit successive approximation analog-to-digital converter (ADC) with on-chip sample-and-hold, SPI serial interface (modes 0,0 and 1,1), ±2 LSB max INL, 100 ksps max sampling rate at 5V, and industrial temperature range (–40°C to +85°C). It serves as a single pseudo-differential input ADC in sensor signal conditioning circuits for embedded data acquisition systems.
For engineers reviewing the MCP3201-CI/SN datasheet, MCP3201-CI/SN pinout, MCP3201-CI/SN application, or MCP3201-CI/SN equivalent, this page delivers verified electrical specifications, package mapping to SOIC-8, functional pin roles, real-world use scenarios, and two validated alternative parts for design flexibility under varying linearity or supply voltage constraints.
Technical Context
The MCP3201-CI/SN implements a standard SAR architecture with internal 20 pF sample capacitor and 1.5 clock-cycle acquisition time. It uses a 3-wire SPI interface where conversion initiates on CS low, samples on first rising CLK edge, and outputs 12-bit MSB-first data after a null bit - all synchronized to falling CLK edges.
Its pseudo-differential input supports IN+ ranging from IN− to VREF + IN−, while IN− accepts ±100 mV around VSS to reject common-mode noise. Reference voltage (VREF) directly defines LSB size (VREF/4096) and full-scale range, enabling flexible scaling across 0.25V to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity analog signal digitization |
| INL (max) | ±2 LSB - ensures monotonicity and ≤0.05% full-scale integral error over temperature |
| DNL (max) | ±1 LSB - guarantees no missing codes across operating conditions |
| Sampling Rate | 100 ksps at 5V - supports real-time monitoring of signals up to ~40 kHz (Nyquist-limited) |
| Supply Range | 2.7V–5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| Standby Current | 500 nA typical - allows ultra-low-power wake-on-event sensing in battery-operated systems |
| Reference Input | 0.25V to VDD - permits internal or external reference selection for dynamic range optimization |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), 150 mil width, surface-mount compatible, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference voltage input | Sets full-scale analog input range and LSB size; must be stable to maintain linearity |
| IN+ (Pin 2) | Positive analog input | Pseudo-differential input; valid range = IN− to VREF + IN−; requires low-impedance drive |
| IN− (Pin 3) | Negative analog input | Common-mode reference; ±100 mV around VSS; enables noise rejection |
| VSS (Pin 4) | Analog/digital ground | Single ground return for analog and digital sections; critical for noise immunity |
| CS/SHDN (Pin 5) | Chip select / shutdown control | Active-low enable; pulls device into 500 nA standby when high between conversions |
| DOUT (Pin 6) | Serial data output | MSB-first SPI output; data valid on falling CLK edge; high-impedance when CS high |
| CLK (Pin 7) | Serial clock input | Drives sampling and conversion timing; supports up to 1.6 MHz at 5V |
| VDD (Pin 8) | Power supply | 2.7V–5.5V single supply; powers analog core, digital logic, and reference buffer |
Key Features
| Feature | Design Value |
|---|---|
| On-chip sample-and-hold | Reduces external component count; enables accurate sampling with 1.5-clock acquisition window |
| SPI interface compatibility | Supports both Mode 0,0 (idle low) and Mode 1,1 (idle high); simplifies integration with most MCUs |
| Low-power operation | 300 µA active current at 5V and 500 nA standby current enable multi-year battery life |
| Pseudo-differential input | Rejects common-mode noise on IN+/IN− pair without requiring matched external resistors |
| Industrial temperature range | Specified performance from –40°C to +85°C ensures reliability in harsh environments |
Applications
| Process Control Monitoring | Sensor Interface for Industrial IoT |
|---|---|
Use Scenario: Continuous digitization of 4–20 mA loop signals conditioned via precision op-amps in PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC capturing process variables (pressure, temperature, flow) at ≤50 ksps with ±2 LSB INL tolerance. Use Value: Enables deterministic 12-bit resolution within tight industrial timing windows while maintaining <100 µA total system quiescent current per channel. | Use Scenario: Battery-powered wireless sensor nodes measuring thermocouple or RTD outputs in predictive maintenance gateways. IC Role / Device Role / Timing Role: Low-power ADC performing burst-mode sampling triggered by MCU wake-up events. Use Value: 500 nA standby current extends coin-cell battery life beyond 5 years; SOIC-8 footprint simplifies rework in space-constrained edge devices. |
| Data Acquisition Front-End | Battery-Operated Portable Instrumentation |
Use Scenario: Multi-channel DAQ systems using multiplexed analog inputs with shared VREF and independent IN+/IN− pairs. IC Role / Device Role / Timing Role: Standalone ADC per channel, synchronized via shared CLK/CS lines and isolated DOUT routing. Use Value: Pseudo-differential architecture eliminates need for external instrumentation amplifiers in low-noise, medium-speed applications. | Use Scenario: Handheld multimeters and portable environmental monitors powered by 2×AA alkaline cells (2.7–3.3V). IC Role / Device Role / Timing Role: Core ADC operating at 50 ksps with 2.7V supply, delivering calibrated readings via SPI to low-power MCU. Use Value: Guaranteed ±2 LSB INL at 2.7V ensures consistent accuracy across battery discharge curve without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP3201-BI/SN | ±1 LSB max INL vs. ±2 LSB for MCP3201-CI/SN; otherwise identical specs and pinout | Required where tighter linearity (<0.025% FS) is mandated for calibration-critical measurements | Select MCP3201-BI/SN only if system-level INL budget demands sub-1 LSB error; higher cost and potentially longer lead time |
| ADS7822U | 12-bit, 200 ksps, 2.7–5.25V supply, SPI interface, but requires external reference and has no shutdown mode | Suitable for higher-speed designs needing >100 ksps, but increases BOM count and power management complexity | Choose ADS7822U when throughput >100 ksps is essential and external reference is already present; not drop-in due to missing CS/SHDN functionality |
Compared with MCP3201-BI/SN, the MCP3201-CI/SN trades 1 LSB of INL tolerance for broader availability and lower unit cost, while versus ADS7822U it provides integrated shutdown and reference flexibility at the expense of maximum sample rate - making it optimal for cost-sensitive, low-to-medium speed industrial sensing.
Availability
MCP3201-CI/SN is available at Aetrix Electronics and suitable for sensor interface, process control, and battery-operated systems requiring stable component supply, long-term manufacturability, and guaranteed industrial temperature performance.
Supply support for MCP3201-CI/SN 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP3201 product line delivers low-power, SPI-compatible 12-bit SAR ADCs optimized for embedded sensor signal acquisition in resource-constrained and battery-sensitive applications - emphasizing simplicity, minimal external components, and robust industrial-grade operation.
FAQ
What is the maximum clock frequency supported by the MCP3201-CI/SN at 2.7V supply?
The MCP3201-CI/SN supports a maximum clock frequency of 0.8 MHz at VDD = 2.7V, as specified in the Electrical Characteristics table on DS21290F-page 4. This limit ensures reliable 12-bit conversion timing and maintains the required 1.5-clock sample period. Exceeding this frequency may cause timing violations or incomplete conversions.
Does the MCP3201-CI/SN require an external reference voltage?
No - the MCP3201-CI/SN accepts an external reference via VREF (Pin 1), but it does not require one: VREF can be tied directly to VDD for ratiometric operation. When VREF = VDD, the full-scale input range becomes IN− to VDD + IN−, simplifying designs where supply rail stability suffices for accuracy requirements.
How does the CS/SHDN pin function during normal operation of the MCP3201-CI/SN?
The CS/SHDN pin on the MCP3201-CI/SN serves dual functions: pulling it low initiates conversion and enables SPI communication, while pulling it high terminates conversion and places the device into 500 nA standby mode. It must be held high between conversions to minimize power consumption - a critical feature for battery-operated applications using the MCP3201-CI/SN.
Can the MCP3201-CI/SN interface directly with an 8-bit SPI microcontroller?
Yes - the MCP3201-CI/SN is fully compatible with 8-bit SPI peripherals. As documented in Section 6.1, it outputs 12 bits plus a null bit (13 total), so two 8-bit transfers are used: the first captures the null bit and top 5 bits, the second retrieves the remaining 7 bits plus LSB-first repetition. Firmware must reconstruct the 12-bit word accordingly - a well-established method confirmed in the MCP3201-CI/SN datasheet.
What is the significance of the ±2 LSB INL specification for the MCP3201-CI/SN?
The ±2 LSB INL (Integral Nonlinearity) specification for the MCP3201-CI/SN means the device's transfer function deviates by no more than ±2 least-significant bits from the ideal straight line across its full 0–4095 code range. This translates to ≤0.05% full-scale error and guarantees monotonic behavior - essential for closed-loop control and precise measurement applications using the MCP3201-CI/SN.
MCP3201-CI/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3201-CI/SN FAQ
1.How can I place an order for MCP3201-CI/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3201-CI/SN 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 MCP3201-CI/SN reliable?
The price and inventory of MCP3201-CI/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3201-CI/SN is usually 5 days.
3.What payment methods are accepted for MCP3201-CI/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3201-CI/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3201-CI/SN?
MCP3201-CI/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3201-CI/SN 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 MCP3201-CI/SN?
For technical support, including MCP3201-CI/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3201-CI/SN requirements.
6.How does Aetrix verify that MCP3201-CI/SN is sourced from the original manufacturer or authorized distributors?
All MCP3201-CI/SN 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 MCP3201-CI/SN meets industry standards.
7.What is the process for return or replacement of MCP3201-CI/SN?
All MCP3201-CI/SN units undergo pre-shipment inspection (PSI). If there is an issue with MCP3201-CI/SN, 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 MCP3201-CI/SN part is unused and in its original packaging.
Return procedure for MCP3201-CI/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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