MCP3221A5T-I/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
The MCP3221A5T-I/OT is a 12-bit successive approximation ADC with an I2C interface, accepting analog inputs from -0.3V to 5.8V in a compact 5-pin SOT-23 package. It provides high-resolution single-channel analog-to-digital conversion for microcontroller-based sensing and measurement applications.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP3221A5T-I/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2300(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP3221A5T-I/OT?
- 12-bit resolution successive approximation ADC
- I2C interface for simple 2-wire MCU connection
- Analog input range up to 5.8V maximum
- Maximum linearity error of 0.0488% for high accuracy
- Ultra-compact 5-pin SOT-23 package
- Single-supply operation compatible with 3.3V and 5V systems
What is MCP3221A5T-I/OT used for?
The MCP3221A5T-I/OT is ideal for microcontroller designs that need a simple, accurate 12-bit analog measurement channel without dedicating MCU ADC pins, connecting via a 2-wire I2C bus shared with other peripherals. It is used in temperature sensing, light measurement, battery voltage monitoring, and pressure transducer readout applications where space is limited. Its 5-pin SOT-23 package fits in the tightest layouts, making it a popular choice for IoT sensor nodes, wearables, and portable instruments.
What are the specifications of MCP3221A5T-I/OT?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Analog Input Voltage-Max | 5.8V |
| Analog Input Voltage-Min | -0.3 V |
| Converter Type | ADC, SUCCESSIVE APPROXIMATION |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Linearity Error-Max (EL) | 0.0488% |
| Number of Analog In Channels | 1 |
| Number of Bits | 12 |
| Number of Functions | 1 |
| Output Bit Code | BINARY |
| Output Format | SERIAL |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Sample Rate | 0.0223MHz |
| Sample and Hold / Track and Hold | SAMPLE |
| Screening Level | TS 16949 |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| ## MCP3221A5T-I/OT Alternates Showing results | Image |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP3221A5T-I/OT datasheet?
MCP3221A5T-I/OT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP3221A5T-I/OT?
Compatible alternatives and drop-in replacements for MCP3221A5T-I/OT:
suggested
suggested
Frequently Asked Questions
What resolution does the MCP3221A5T-I/OT provide, and how does that translate to measurement precision?
The MCP3221A5T-I/OT delivers 12-bit resolution, dividing the full-scale input range into 4096 discrete steps. On a 5V reference, each step represents approximately 1.22 mV, enabling precise measurements of slowly varying analog signals such as battery voltage, temperature sensor outputs, or pressure transducer readings in IoT and instrumentation designs.
How does the MCP3221A5T-I/OT connect to a microcontroller, and does it require dedicated analog input pins?
The MCP3221A5T-I/OT communicates entirely over a 2-wire I2C bus, so it does not occupy any MCU analog input pins. This makes it valuable in designs where the host MCU has no spare ADC channels or where the analog signal source is far from the MCU and routing a clean analog trace is difficult, as the digital I2C signal is far less susceptible to noise pickup.
For a battery voltage monitoring circuit, is the MCP3221A5T-I/OT linearity accurate enough for reliable threshold detection?
With a maximum integral linearity error of 0.0488%, the MCP3221A5T-I/OT introduces less than 2 LSBs of nonlinearity error across the full 12-bit range, which is well within the requirements for battery voltage threshold detection where typical accuracy targets are 1% or better. This accuracy, combined with the 5-pin SOT-23 package and I2C interface, makes it a compact and precise solution for fuel-gauge and low-battery alert circuits.
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|---|---|---|
| 1+ | $1.2300 | $1.23 |
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