MCP3421A0T-E/CHVAO Microchip Integrated Circuit (SOT23 (6-Pin)) In Stock
MCP3421A0T-E/CHVAO is an automotive 18-bit single-channel delta-sigma ADC with ±2.048 V input range, 0.0035% linearity error, 4 samples per second at maximum resolution, and I2C interface in a 6-pin SOT-23 package for precision measurement applications.
- Manufacturer
- Microchip
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- MCP3421A0T-E/CHVAO Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP3421A0T-E/CHVAO?
- 18-bit delta-sigma conversion delivering sub-LSB linearity error of 0.0035% for high-precision measurement
- Single-channel ±2.048 V differential input range suited for bridge sensor and thermocouple interfaces
- I2C interface with programmable gain amplifier enabling direct low-level signal digitization
- AEC-Q100 automotive qualification supporting -40°C to +125°C reliable operation
- Ultra-compact 6-pin SOT-23 package occupying minimal board space in space-constrained designs
What is MCP3421A0T-E/CHVAO used for?
MCP3421A0T-E/CHVAO is designed for precision measurement in automotive and industrial applications including battery cell voltage monitoring, thermocouple digitization, and bridge sensor interfaces requiring 18-bit resolution. Its integrated PGA allows the ADC to directly amplify millivolt-level signals from strain gauges and pressure transducers before digitizing, eliminating an external instrumentation amplifier in many designs. The I2C interface and SOT-23 package make it the compact measurement front-end for smart sensor nodes and portable calibration equipment.
What are the specifications of MCP3421A0T-E/CHVAO?
| Factory Lead Time | 6Weeks |
| YTEOL | 20 |
| Analog Input Voltage-Max | 2.048V |
| Analog Input Voltage-Min | -2.048 V |
| Converter Type | ADC, DELTA-SIGMA |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Linearity Error-Max (EL) | 0.0035% |
| Number of Analog In Channels | 1 |
| Number of Bits | 18 |
| Number of Functions | 1 |
| Output Bit Code | 2'S COMPLEMENT BINARY |
| Output Format | SERIAL |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Sample Rate | 0.00024MHz |
| Screening Level | AEC-Q100; TS 16949 |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP3421A0T-E/CHVAO datasheet?
MCP3421A0T-E/CHVAO Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP3421A0T-E/CHVAO?
Compatible alternatives and drop-in replacements for MCP3421A0T-E/CHVAO:
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Frequently Asked Questions
What resolution does MCP3421A0T-E/CHVAO achieve, and how does 18-bit precision benefit a battery cell voltage measurement system?
MCP3421A0T-E/CHVAO provides 18-bit resolution over the ±2.048 V input range, giving a minimum step size of approximately 15.6 µV per LSB. For a 3.6 V lithium-ion cell monitored through a resistor divider scaled to the ±2.048 V input, this resolution enables 0.01% voltage accuracy — sufficient to detect a 3.6 mV state-of-charge change corresponding to roughly 0.1% SOC, far exceeding the needs of most automotive BMS designs.
How does MCP3421A0T-E/CHVAO's integrated PGA simplify interfacing to a Wheatstone bridge pressure sensor?
MCP3421A0T-E/CHVAO includes an on-chip programmable gain amplifier (PGA) with gain settings of 1×, 2×, 4×, and 8×. A 100 Ω bridge pressure sensor excited at 5 V produces a full-scale differential output of approximately 25 mV. Setting PGA gain to 8× amplifies this to 200 mV before conversion, filling 10% of the ADC's ±2.048 V range and improving effective measurement resolution by 8×, without any external op-amp.
When does the 4 sps maximum sample rate of MCP3421A0T-E/CHVAO limit an application, and what alternative sampling rates are available?
MCP3421A0T-E/CHVAO achieves 4 samples per second only at 18-bit resolution, which is appropriate for slow phenomena like temperature, pressure, and DC voltage. At 16-bit resolution it provides 15 sps, and at 12-bit it reaches 240 sps. For vibration analysis or fast transient capture requiring kilohertz sample rates, a SAR ADC such as MCP3201 at 100 ksps is more appropriate. MCP3421 is the right choice when noise rejection via oversampling matters more than speed.
For a compact automotive sensor PCB, how does the 6-pin SOT-23 package of MCP3421A0T-E/CHVAO compare to a 16-pin SOIC ADC in board space and cost?
The 6-pin SOT-23 package measures 2.9 mm × 1.6 mm, roughly 15× smaller by area than a 16-pin SOIC at 10 mm × 6 mm. For a multi-point thermal monitoring board with 8 sensors, using 8 MCP3421 devices in SOT-23 packages on separate I2C addresses occupies under 40 mm² total, compared to over 480 mm² for 8 SOIC-16 devices. The AEC-Q100 qualification ensures this compact solution also meets automotive reliability screening requirements.
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