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Microchip Technology MCP3302-CI/ST
- Part No.:
- MCP3302-CI/ST
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MCP3302-CI/ST.pdf
- Description:
- IC ADC 13BIT SAR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:187
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Product details
Overview
MCP3302-CI/ST from Microchip Technology is a 13-bit successive approximation register (SAR) analog-to-digital converter with full differential input capability, configurable for two differential or four single-ended channels. It operates from 4.5V to 5.5V, achieves 100 ksps sampling rate at 5V, and delivers ±1 LSB INL (B-grade), ±1 LSB DNL, and 78 dB SINAD. It is used in battery-powered remote sensor interfaces requiring high-precision, low-power signal digitization.
For engineers reviewing the MCP3302-CI/ST datasheet, MCP3302-CI/ST pinout, MCP3302-CI/ST application, or MCP3302-CI/ST equivalent, this page provides verified electrical specifications, SPI interface timing constraints, differential input configuration guidance, standby current behavior (50 nA typ), and package-specific thermal resistance data for TSSOP-14 implementation.
Technical Context
The MCP3302-CI/ST implements a SAR architecture with integrated sample-and-hold circuitry, supporting both full differential and pseudo-differential modes. Its 13-bit output uses binary two's complement coding, with sign bit first on DOUT, and requires 14.5 clock cycles per conversion (1.5 for acquisition + 13 for conversion).
It features dual ground separation (AGND/DGND), programmable channel selection via DIN, and shutdown control via CS/SHDN. Reference voltage range is 0.4V to VDD, enabling LSB resolution from 98 µV (VREF = 400 mV) to 1.22 mV (VREF = 5V), with CMRR of 79 dB and PSR of 74 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 13-bit (12 data bits + 1 sign bit); enables bipolar measurement from –4096 to +4095 codes with 1 LSB = 2×VREF/8192. |
| Sampling Rate | 100 ksps at 5V supply; defines maximum continuous throughput for time-critical sensor monitoring. |
| INL / DNL | ±1 LSB max (B-grade); ensures monotonicity and end-point linearity critical for closed-loop control feedback. |
| Supply Range | 4.5V to 5.5V; guarantees full specification compliance including accuracy and speed across industrial temperature range. |
| Standby Current | 50 nA typical; supports ultra-low-power wake-on-event architectures in battery-operated systems. |
| SPI Interface | 4-wire master-slave mode (CLK, DIN, DOUT, CS/SHDN); compatible with PIC® MCU peripherals without level-shifting. |
| Input Configuration | 2 differential or 4 single-ended channels; selected dynamically via command bits on DIN, no hardware rework needed. |
Pinout & Package
The MCP3302-CI/ST is housed in a 14-pin TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts and offering θJA = 100°C/W thermal resistance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | CH0–CH3 | Analog input terminals; support full differential (CH0+/CH1–, CH2+/CH3–) or single-ended configurations with ±VREF span. |
| 7 | DGND | Digital ground reference; must be tied to AGND at single point to prevent digital noise coupling into analog path. |
| 8 | CS/SHDN | Active-low chip select and shutdown control; high state reduces current to 50 nA and halts conversion. |
| 9 | DIN | Serial data input; latches channel configuration and mode bits on rising CLK edge before conversion start. |
| 10 | DOUT | Serial data output; outputs MSB-first 13-bit two's complement code on falling CLK edge during conversion. |
| 11 | CLK | External serial clock input; controls acquisition (1.5 cycles) and conversion (13 cycles); max 2.1 MHz at 5V. |
| 12 | AGND | Analog ground reference; forms low-impedance return for internal analog circuits; requires dedicated plane routing. |
| 13 | VREF | Reference voltage input; sets full-scale range and LSB size; accepts 0.4V–5.5V; bypass with 0.1 µF ceramic capacitor. |
| 14 | VDD | Positive supply rail; powers analog and digital sections; requires local 0.1 µF ceramic decoupling adjacent to pin. |
| 5, 6 | NC | No connection; left unconnected per Microchip design; not internally bonded in TSSOP-14 variant. |
Key Features
| Feature | Design Value |
|---|---|
| Full differential input architecture | Rejects common-mode noise up to 79 dB, enabling accurate measurement in electrically noisy environments like motor drives. |
| User-programmable input configuration | Software-selectable between 2 differential or 4 single-ended channels via DIN command, eliminating board redesign for sensor count changes. |
| Low-power shutdown mode | Reduces supply current to 50 nA typical, extending battery life in intermittent-sampling applications such as environmental monitors. |
| Industrial temperature grade | Specified from –40°C to +85°C, ensuring reliable operation in outdoor sensor nodes and factory automation equipment. |
| Integrated sample-and-hold | Acquires analog signal in 1.5 CLK cycles, enabling precise timing control without external components or additional PCB area. |
Applications
| Remote Sensor Node | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Wireless soil moisture and temperature node deployed in agricultural fields with 10-year battery life target. IC Role / Device Role / Timing Role: ADC digitizes differential output from bridge-based sensors; initiates conversion only during scheduled transmission windows. Use Value: 50 nA standby current minimizes quiescent drain; 100 ksps allows oversampling for noise reduction without sacrificing energy budget. |
Use Scenario: Portable handheld meter logging vibration, pressure, and humidity over 72-hour field deployments. IC Role / Device Role / Timing Role: Configured for 4 single-ended inputs to interface diverse transducers; synchronized to MCU sleep/wake cycles. Use Value: ±1 LSB INL ensures traceable calibration across operating temperature; TSSOP-14 footprint saves board space vs. SOIC alternatives. |
| Industrial Transducer Interface | Portable Medical Instrumentation |
|
Use Scenario: DIN-rail mounted PLC module acquiring signals from strain gauges and RTDs in factory machinery. IC Role / Device Role / Timing Role: Full differential mode rejects 50/60 Hz EMI from nearby AC motors; CS/SHDN enables per-channel power gating. Use Value: 79 dB CMRR suppresses line-frequency interference; 4.5–5.5V supply range matches standard industrial 5V rails. |
Use Scenario: Handheld pulse oximeter requiring low-noise analog front-end for photodiode current measurement. IC Role / Device Role / Timing Role: Uses CH0/CH1 as differential pair for I/V conversion output; leverages 78 dB SINAD for clean SpO₂ calculation. Use Value: 13-bit resolution captures subtle perfusion changes; 1.22 mV LSB (at 5V VREF) resolves microvolt-level signal variations. |
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 |
|---|---|---|---|
| ADS7816U | 12-bit resolution, 200 ksps, single-ended only, 2.7–5.25V supply | Lacks differential input and B-grade linearity; suited for cost-sensitive, non-bipolar applications | Select when higher speed outweighs resolution and differential capability needs |
| MCP3304-I/SL | Same family, 4 differential / 8 single-ended channels, 16-pin SOIC, identical specs except channel count | Requires PCB layout change due to extra pins and larger footprint; no performance trade-off | Choose when future expansion to 4+ differential sensors is anticipated |
Compared with ADS7816U and MCP3304-I/SL, the MCP3302-CI/ST uniquely balances 13-bit differential precision, ultra-low standby current, and compact TSSOP-14 packaging-making it optimal for space- and power-constrained designs where bipolar sensing and industrial temperature stability are mandatory.
Availability
MCP3302-CI/ST is available at Aetrix Electronics and suitable for remote sensor nodes, battery-powered data loggers, and industrial transducer interfaces requiring stable component supply and long-term lifecycle support.
Supply support for MCP3302-CI/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 devices, and Flash-IP solutions, serving automotive, industrial, and consumer markets with vertically integrated silicon and development tools.
The MCP3302-CI/ST belongs to Microchip's precision SAR ADC product line, engineered specifically for low-power, high-accuracy data acquisition in resource-constrained embedded systems with demanding noise immunity requirements.
FAQ
What is the guaranteed INL specification for MCP3302-CI/ST?
The MCP3302-CI/ST is a B-grade device with ±1 LSB maximum integral nonlinearity over –40°C to +85°C, confirmed in DS21697F Section 1.0 Electrical Characteristics. This applies under full differential input configuration with VDD = 5V, VREF = 5V, and FSAMPLE = 100 ksps. The specification ensures end-point linearity for calibration-critical applications without requiring post-fabrication correction.
Does MCP3302-CI/ST support true differential input mode?
Yes, the MCP3302-CI/ST supports true full differential input mode using CH0/CH1 and CH2/CH3 as independent differential pairs, as defined in Figure 1-5 of DS21697F. In this mode, the device measures the voltage difference between IN+ and IN– pins, rejecting common-mode signals up to 79 dB, and outputs a signed 13-bit two's complement result where the MSB is the sign bit.
What is the minimum clock frequency required for valid conversion in MCP3302-CI/ST?
The MCP3302-CI/ST requires a minimum clock frequency of 105 kHz during the 13-cycle conversion phase (TCONV) to prevent charge bleed from the internal sample capacitor, as specified in Section 5.2.1 of DS21697F. Clocks slower than this threshold may cause linearity errors exceeding ±1 LSB, even if acquisition time (1.5 cycles) remains satisfied.
How does the VREF setting affect LSB size in MCP3302-CI/ST?
LSB size in the MCP3302-CI/ST is calculated as 2 × VREF / 8192, per Equation 3-1 in DS21697F. At VREF = 400 mV, LSB = 98 µV; at VREF = 5V, LSB = 1.22 mV. This direct scaling allows designers to optimize resolution versus input signal range-e.g., using lower VREF improves small-signal sensitivity while reducing full-scale headroom.
Is MCP3302-CI/ST pin-compatible with other packages in the MCP3302 family?
No, the MCP3302-CI/ST (TSSOP-14) is not pin-compatible with the PDIP-14 or SOIC-14 variants of the MCP3302, despite sharing identical pin functions. Pin 1–4 (CH0–CH3), pin 7 (DGND), pin 8 (CS/SHDN), pin 9 (DIN), pin 10 (DOUT), pin 11 (CLK), pin 12 (AGND), pin 13 (VREF), and pin 14 (VDD) map identically, but mechanical dimensions, thermal pad presence, and soldering profiles differ significantly between packages.
MCP3302-CI/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3302-CI/ST FAQ
1.How can I place an order for MCP3302-CI/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3302-CI/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 MCP3302-CI/ST reliable?
The price and inventory of MCP3302-CI/ST 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/ST is usually 5 days.
3.What payment methods are accepted for MCP3302-CI/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3302-CI/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3302-CI/ST?
MCP3302-CI/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3302-CI/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 MCP3302-CI/ST?
For technical support, including MCP3302-CI/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3302-CI/ST requirements.
6.How does Aetrix verify that MCP3302-CI/ST is sourced from the original manufacturer or authorized distributors?
All MCP3302-CI/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 MCP3302-CI/ST meets industry standards.
7.What is the process for return or replacement of MCP3302-CI/ST?
All MCP3302-CI/ST units undergo pre-shipment inspection (PSI). If there is an issue with MCP3302-CI/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 MCP3302-CI/ST part is unused and in its original packaging.
Return procedure for MCP3302-CI/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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