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Microchip Technology MCP3302-CI/P
- Part No.:
- MCP3302-CI/P
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MCP3302-CI/P.pdf
- Description:
- IC ADC 13BIT SAR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,044
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Product details
Overview
MCP3302-CI/P from Microchip Technology is a 13-bit successive approximation register (SAR) analog-to-digital converter with full differential input capability, SPI serial interface, and user-programmable configuration for either two differential or four single-ended analog inputs. It delivers ±1 LSB INL (B-grade), 100 ksps sampling rate at 5V, and operates from 4.5V to 5.5V supply - ideal for precision remote sensor data acquisition in industrial instrumentation.
For engineers reviewing the MCP3302-CI/P datasheet, MCP3302-CI/P pinout, MCP3302-CI/P application, or MCP3302-CI/P equivalent, key selection considerations include its differential input architecture, low 450 µA active current, 14-pin PDIP package compatibility, and SPI timing constraints for accurate 13-bit bipolar conversion in battery-constrained or noise-sensitive systems.
Technical Context
The MCP3302-CI/P implements a SAR architecture with integrated sample-and-hold circuitry, requiring 1.5 clock cycles for acquisition and 13 clock cycles for conversion. Its full differential input stage supports common-mode rejection of 79 dB and channel-to-channel crosstalk below –110 dB, enabling high-fidelity signal capture in mixed-signal environments.
It uses binary two's complement output coding, accepts reference voltages from 0.4 V to VDD, and features dedicated AGND/DGND separation with strict layout guidance to preserve 13-bit accuracy. The CS/SHDN pin controls both SPI frame initiation and standby mode entry, reducing current to 50 nA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 13-bit (12 data bits + sign bit): enables ±4095 code range for bipolar signals with 98 µV to 1.22 mV LSB step size depending on VREF setting |
| Sampling Rate | 100 ksps maximum at 5V: supports real-time monitoring of fast-changing transducer outputs without aliasing up to 50 kHz Nyquist bandwidth |
| INL / DNL | ±1 LSB max (B-grade): ensures monotonic transfer function and <0.012% full-scale linearity error critical for closed-loop control feedback |
| Supply Range | 4.5V to 5.5V: guarantees full specification compliance including dynamic performance (SINAD = 78 dB, THD = –91 dB) across industrial temperature range |
| Active Current | 450 µA max at 5V: allows continuous operation in low-power embedded systems with minimal thermal impact and voltage drop |
| Standby Current | 1 µA max (50 nA typical): enables microamp-level sleep states between conversions for extended battery life in portable sensors |
| Temperature Range | –40°C to +85°C: validated for deployment in uncontrolled industrial enclosures and outdoor remote monitoring nodes |
Pinout & Package
The MCP3302-CI/P is housed in a 14-pin plastic dual in-line package (PDIP) with 0.300-inch body width and standard through-hole mounting. Pin spacing follows JEDEC MS-001, compatible with legacy prototyping and production PCBs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | CH0–CH3 Analog Inputs | Selectable as two differential pairs (CH0/CH1, CH2/CH3) or four single-ended channels; absolute input range = VSS–0.3V to VDD+0.3V |
| 9 | DGND | Digital ground reference for internal logic; must be tied to AGND at single point to prevent digital noise coupling into analog path |
| 10 | CS/SHDN | Active-low chip select initiating SPI frame; high state forces shutdown mode with 50 nA standby current |
| 11 | DIN | SPI serial data input latched on rising CLK edge; carries channel configuration bits for input mode selection |
| 12 | DOUT | SPI serial data output changing on falling CLK edge; outputs 13-bit two's complement result MSB-first with sign bit first |
| 13 | CLK | SPI clock input driving acquisition (1.5 cycles) and conversion (13 cycles); max 2.1 MHz at 5V, min 105 kHz to avoid charge bleed |
| 14 | AGND | Analog ground return for internal ADC core; requires low-impedance connection to system analog plane for <±1 LSB accuracy |
| 15 | VREF | External reference voltage input (0.4V–5V) setting full-scale span; LSB = 2×VREF/8192 determines resolution granularity |
| 16 | VDD | +4.5V to +5.5V power supply; requires 0.1 µF ceramic bypass capacitor placed adjacent to pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Full differential input architecture | Enables rejection of common-mode noise up to 79 dB, critical for measuring small signals from bridge sensors or thermocouples in electrically noisy plants |
| User-configurable input mapping | Hardware-selectable via DIN command to operate as 2 differential or 4 single-ended channels - no external multiplexer needed |
| Low-power SPI interface | Eliminates need for parallel bus traces; reduces PCB layer count and EMI while supporting daisy-chaining of multiple converters |
| Bipolar output coding | Two's complement format directly supports signed arithmetic in PIC® MCU firmware without software sign extension or offset correction |
| Industrial-grade thermal performance | Specified over –40°C to +85°C with thermal resistance θJA = 70°C/W (PDIP), ensuring stable INL and gain error in non-climate-controlled deployments |
Applications
| Remote Sensor Node | Portable Instrumentation |
|---|---|
|
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and pressure from isolated field locations. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from multiple transducers using differential inputs to reject long-cable pickup. Use Value: 50 nA standby current extends 2xAA battery life to >5 years; 100 ksps sampling captures transient events like rapid dew-point shifts. |
Use Scenario: Handheld multimeter with auto-ranging and true RMS calculation. IC Role / Device Role / Timing Role: High-accuracy front-end ADC acquiring AC/DC voltage and current waveforms with programmable gain and bipolar scaling. Use Value: ±1 LSB INL ensures calibration traceability to NIST standards; full differential mode rejects CM noise from switching power supplies inside the enclosure. |
| Industrial Transducer Interface | Embedded Control Feedback Loop |
|
Use Scenario: PLC analog input module conditioning 4–20 mA loop signals from flow meters and level sensors. IC Role / Device Role / Timing Role: Isolated ADC channel converting current-derived voltage across precision shunt resistor with high CMRR. Use Value: 79 dB CMRR suppresses ground-loop interference in factory-floor wiring; 14-pin PDIP simplifies conformal coating and mechanical mounting. |
Use Scenario: Motor drive board measuring back-EMF and phase currents for field-oriented control. IC Role / Device Role / Timing Role: Synchronized sampling ADC feeding real-time DSP with 13-bit resolution for torque ripple minimization. Use Value: 100 ksps rate supports 10 kHz PWM carrier frequency sampling; SPI interface enables deterministic timing with PIC18FxxK80 MCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 13-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP3302-E/P | Same pinout and electrical specs, but rated for extended temperature range (–40°C to +125°C) and higher reliability screening | Suitable for under-hood automotive or high-temperature industrial control cabinets where ambient exceeds +85°C | Select MCP3302-E/P when operating beyond +85°C ambient or requiring AEC-Q100 stress testing compliance |
| ADS7816U | 16-bit SAR ADC, 200 ksps, single-ended only, 5V supply, different SPI framing and pinout (8-pin SOIC) | Higher resolution for precision metrology; lacks differential inputs and programmable channel configuration | Choose ADS7816U only if 16-bit unipolar resolution outweighs loss of differential mode and increased layout redesign effort |
Compared with MCP3302-E/P, the MCP3302-CI/P offers identical functionality at lower cost and qualification level for standard industrial use; versus ADS7816U, it trades resolution for differential flexibility and direct PIC® MCU compatibility without protocol translation.
Availability
MCP3302-CI/P is available at Aetrix Electronics and suitable for remote sensor nodes, portable instrumentation, and industrial transducer interface applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MCP3302-CI/P 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, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP3302-CI/P belongs to Microchip's precision analog product line, designed specifically for low-power, high-accuracy data acquisition in resource-constrained embedded systems interfacing with sensors, transducers, and industrial signal sources.
FAQ
What is the maximum sampling rate supported by the MCP3302-CI/P?
The MCP3302-CI/P supports a maximum sampling rate of 100 ksps when operated at VDD = 5V and FCLK = 2.1 MHz. This rate is achievable only with proper analog input drive strength and acquisition time compliance - exceeding it without adjusting source impedance or clock timing may degrade INL beyond ±1 LSB.
Does the MCP3302-CI/P support differential input mode?
Yes, the MCP3302-CI/P natively supports full differential input mode across two independent channel pairs (CH0/CH1 and CH2/CH3). In this configuration, it achieves 79 dB common-mode rejection and maintains ±1 LSB INL, making it suitable for bridge-based sensors and noisy industrial environments.
What is the reference voltage range for the MCP3302-CI/P?
The MCP3302-CI/P accepts an external reference voltage (VREF) from 0.4 V to VDD (5.5 V). The LSB size scales linearly per Equation 3-1: LSB = 2 × VREF / 8192 - enabling resolution tuning from 98 µV (at 0.4 V) to 1.22 mV (at 5 V) without hardware changes.
How does the CS/SHDN pin function in the MCP3302-CI/P?
The CS/SHDN pin serves dual roles: pulled low to initiate SPI communication and start conversion, and pulled high to terminate conversion and place the MCP3302-CI/P into standby mode drawing ≤1 µA. It must not remain low across consecutive conversions to ensure proper internal state reset.
Is the MCP3302-CI/P compatible with PIC® microcontrollers?
Yes, the MCP3302-CI/P is explicitly designed for seamless integration with Microchip's PIC® MCU family via its industry-standard SPI interface. Its timing parameters, two's complement output format, and channel configuration protocol align directly with PIC peripheral libraries and MPLAB® Code Configurator drivers.
MCP3302-CI/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 13
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 14-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MCP3302-CI/P FAQ
1.How can I place an order for MCP3302-CI/P through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3302-CI/P 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 MCP3302-CI/P reliable?
The price and inventory of MCP3302-CI/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3302-CI/P is usually 5 days.
3.What payment methods are accepted for MCP3302-CI/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3302-CI/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3302-CI/P?
MCP3302-CI/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3302-CI/P 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 MCP3302-CI/P?
For technical support, including MCP3302-CI/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3302-CI/P requirements.
6.How does Aetrix verify that MCP3302-CI/P is sourced from the original manufacturer or authorized distributors?
All MCP3302-CI/P 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 MCP3302-CI/P meets industry standards.
7.What is the process for return or replacement of MCP3302-CI/P?
All MCP3302-CI/P units undergo pre-shipment inspection (PSI). If there is an issue with MCP3302-CI/P, 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 MCP3302-CI/P part is unused and in its original packaging.
Return procedure for MCP3302-CI/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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