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Microchip Technology MCP3208-CI/SL
- Part No.:
- MCP3208-CI/SL
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MCP3208-CI/SL.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:112
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Product details
Overview
MCP3208-CI/SL from Microchip Technology Inc. is a 12-bit successive approximation analog-to-digital converter (ADC) with on-chip sample-and-hold, SPI serial interface, and eight single-ended or four pseudo-differential input channels. It operates from 2.7V to 5.5V, delivers up to 100 ksps at 5V, and features ±2 LSB max INL and ±1 LSB max DNL - optimized for industrial sensor interface and battery-powered data acquisition systems.
For engineers reviewing the MCP3208-CI/SL datasheet, MCP3208-CI/SL pinout, MCP3208-CI/SL application, or MCP3208-CI/SL equivalent, key selection considerations include its 16-pin SOIC package, SPI mode 0/1 compatibility, VREF-referenced full-scale range, low 400 µA active current at 5V, and guaranteed operation across –40°C to +85°C.
Technical Context
The MCP3208-CI/SL implements a SAR architecture with internal 20 pF sample capacitor and 1.5-clock-cycle acquisition time starting on the fourth rising CLK edge after the start bit. Conversion completes in 12 clock cycles, with output data shifted out MSB-first on DOUT's falling edge.
Its analog input structure supports programmable channel configuration via SPI command bits (SGL/DIFF + D2:D0), enabling flexible routing of CH0–CH7 as either independent single-ended inputs or matched pseudo-differential pairs - where IN- is constrained to ±100 mV relative to VSS and IN+ ranges from IN- to VREF + IN-.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes over full-scale input range |
| INL (max) | ±2 LSB - limits end-point linearity error to ±0.049% of full scale at VDD = 5V |
| DNL (max) | ±1 LSB - guarantees monotonicity and absence of missing codes |
| Sampling Rate | 100 ksps at VDD = 5V - supports real-time capture of signals up to ~40 kHz Nyquist bandwidth |
| Supply Range | 2.7V–5.5V - enables direct interfacing with 3.3V and 5V logic/system rails |
| Active Current | 400 µA max at 5V - allows continuous conversion in power-constrained embedded nodes |
| Standby Current | 2 µA max - supports ultra-low-power sleep modes via CS/SHDN pin control |
| Temp Range | –40°C to +85°C - qualified for industrial-grade operation without derating |
Pinout & Package
The MCP3208-CI/SL is supplied in a 16-pin SOIC package (body width 3.9 mm, pitch 1.27 mm), pin-compatible with 16-pin PDIP and matching footprint requirements for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VREF | External reference voltage input - sets full-scale analog input range; accepts 0.25V to VDD |
| 2 | DIN | SPI serial data input - receives 4-bit configuration command (start + SGL/DIFF + D2:D0) |
| 3 | CS/SHDN | Chip select and shutdown control - falling edge initiates conversion; high state forces standby (2 µA) |
| 4 | DGND | Digital ground reference - isolates digital switching noise from analog section |
| 5–12 | CH0–CH7 | Analog input channels - configurable as eight single-ended or four pseudo-differential pairs |
| 13 | DOUT | SPI serial data output - outputs 12-bit result MSB-first on CLK falling edge |
| 14 | CLK | SPI serial clock input - controls sampling timing, conversion, and data shift-out (max 2 MHz @ 5V) |
| 15 | AGND | Analog ground reference - provides low-noise return path for analog inputs and VREF |
| 16 | VDD | Positive supply rail - powers both analog and digital circuitry from 2.7V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Input Mode | Runtime-selectable single-ended or pseudo-differential operation per conversion - eliminates need for external signal conditioning hardware |
| SPI Interface Compatibility | Supports SPI modes 0,0 and 1,1 - interoperates with standard MCU hardware SPI peripherals without bit-banging |
| On-Chip Sample-and-Hold | Integrated 20 pF hold capacitor with 1.5-clock acquisition - removes requirement for external S/H circuit in most medium-speed applications |
| Low-Power Standby | 2 µA max IDD in CS-high state - enables microamp-level system sleep while preserving ADC readiness |
| Industrial Temperature Range | Specified performance from –40°C to +85°C - validated for unregulated environments like factory floor or outdoor telemetry |
| Reference Flexibility | VREF accepts 0.25V to VDD - permits use of precision external references or direct connection to stable supply rail |
Applications
| Industrial Sensor Interface | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Monitoring temperature, pressure, and humidity sensors in PLC I/O modules with isolated 24V field power. IC Role / Device Role / Timing Role: ADC front-end digitizing conditioned analog outputs from 4–20 mA transducers and thermistor networks. Use Value: 12-bit resolution and ±2 LSB INL ensure <0.05% measurement accuracy across 0–100% span; SPI interface simplifies integration with ARM Cortex-M3/M4 controllers. | Use Scenario: Multi-channel environmental monitoring in portable handheld meters powered by two AA cells. IC Role / Device Role / Timing Role: Low-power A/D converter acquiring readings from light, CO₂, and ambient temperature sensors every 5 seconds. Use Value: 400 µA active current and 2 µA standby enable >1-year battery life; 2.7V minimum supply allows operation until battery depletion. |
| Process Control Loop Sampling | Medical Instrument Signal Conditioning |
Use Scenario: Closed-loop feedback in HVAC zone controllers using thermocouple and RTD inputs with cold-junction compensation. IC Role / Device Role / Timing Role: High-fidelity analog acquisition stage feeding PID computation in real-time microcontroller firmware. Use Value: Pseudo-differential mode rejects common-mode noise from shared sensor grounds; 100 ksps throughput supports sub-millisecond loop update rates. | Use Scenario: Portable ECG and pulse oximetry devices requiring simultaneous multi-lead analog capture. IC Role / Device Role / Timing Role: Precision signal digitization of low-amplitude bio-potentials referenced to patient ground. Use Value: AGND/DGND separation and ±100 mV IN- tolerance suppress 50/60 Hz interference; 72 dB SINAD ensures diagnostic-grade waveform fidelity. |
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 |
|---|---|---|---|
| MCP3208-I/SL | Same silicon, extended –40°C to +125°C operating range; higher max INL (±3 LSB) and active current (500 µA) | Required for under-hood automotive or high-temp industrial enclosures | Select MCP3208-I/SL only if ambient exceeds +85°C; otherwise MCP3208-CI/SL offers tighter INL and lower power |
| ADS7822U | 12-bit, 200 ksps, SPI interface, but requires external reference and has no pseudo-differential mode | Suitable for high-speed single-ended acquisition where differential rejection is not needed | Choose ADS7822U when throughput >100 ksps is mandatory; MCP3208-CI/SL preferred for integrated reference and flexible input topology |
Compared with MCP3208-I/SL, the MCP3208-CI/SL trades extended temperature rating for improved linearity and lower power - making it optimal for cost-sensitive industrial controls. Against ADS7822U, it provides built-in VREF support and pseudo-differential capability at the expense of peak sampling rate.
Availability
MCP3208-CI/SL is available at Aetrix Electronics and suitable for industrial sensor interface, battery-powered data loggers, and process control applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MCP3208-CI/SL 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP320x family was designed specifically for embedded systems requiring high-resolution, low-power, SPI-compatible analog-to-digital conversion in space- and cost-constrained industrial and portable applications.
FAQ
What is the maximum clock frequency supported by the MCP3208-CI/SL?
The MCP3208-CI/SL supports up to 2.0 MHz SPI clock frequency at VDD = 5V and 1.0 MHz at VDD = 2.7V. Exceeding these limits may cause timing violations in setup/hold windows or incomplete conversions. The device requires a minimum clock speed (≥10 kHz) to maintain charge on the internal 20 pF sample capacitor and preserve ±2 LSB INL specification across temperature.
Does the MCP3208-CI/SL require an external reference voltage?
No - the MCP3208-CI/SL can operate with VREF tied directly to VDD for ratiometric measurements, or accept an external precision reference between 0.25V and VDD. Using VDD as VREF simplifies design when measuring sensors with the same supply rail, while external references improve absolute accuracy. The MCP3208-CI/SL does not contain an internal reference generator.
How many analog input channels does the MCP3208-CI/SL support?
The MCP3208-CI/SL supports eight analog input channels (CH0–CH7), configurable per conversion as either eight single-ended inputs or four pseudo-differential pairs (e.g., CH0/CH1 as IN+/IN−). This is distinct from the 4-channel MCP3204. Channel selection and mode are set dynamically via the 4-bit SPI command string sent before each conversion.
What is the meaning of "CI" in the part number MCP3208-CI/SL?
The "CI" suffix in MCP3208-CI/SL denotes the Industrial temperature grade (–40°C to +85°C) and the ±2 LSB maximum Integral Nonlinearity (INL) specification. It differentiates this variant from the "BI" grade (±1 LSB INL) and "I" grade (–40°C to +125°C, ±3 LSB INL). The "/SL" indicates 16-pin SOIC packaging with standard lead finish.
Can the MCP3208-CI/SL be used in pseudo-differential mode with IN- biased above VSS?
Yes - the MCP3208-CI/SL allows IN- to range from VSS –100 mV to VSS +100 mV in pseudo-differential mode, enabling small common-mode offsets or biasing for AC-coupled sensors. However, if IN- exceeds VSS +100 mV, the specified INL and DNL performance is no longer guaranteed, and the full-scale code (FFFh) may not be reached even when IN+ = VREF + IN-. Valid operation requires adherence to the ±100 mV limit per datasheet Section 4.1.
MCP3208-CI/SL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 4, 8
- Input Type:
- Pseudo-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:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3208-CI/SL FAQ
1.How can I place an order for MCP3208-CI/SL through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3208-CI/SL 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 MCP3208-CI/SL reliable?
The price and inventory of MCP3208-CI/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3208-CI/SL is usually 5 days.
3.What payment methods are accepted for MCP3208-CI/SL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3208-CI/SL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3208-CI/SL?
MCP3208-CI/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3208-CI/SL 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 MCP3208-CI/SL?
For technical support, including MCP3208-CI/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3208-CI/SL requirements.
6.How does Aetrix verify that MCP3208-CI/SL is sourced from the original manufacturer or authorized distributors?
All MCP3208-CI/SL 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 MCP3208-CI/SL meets industry standards.
7.What is the process for return or replacement of MCP3208-CI/SL?
All MCP3208-CI/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP3208-CI/SL, 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 MCP3208-CI/SL part is unused and in its original packaging.
Return procedure for MCP3208-CI/SL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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