AVR128DB28-I/SP Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
AVR128DB28-I/SP is an 8-bit AVR microcontroller from Microchip in a 28-pin SPDIP package, featuring 128 KB flash, 24 MHz clock, 12-bit ADC, DAC, Op-Amp, UART, SPI, TWI, MVIO, and ZCD for versatile mixed-signal designs. It operates up to 85°C and includes a multi-voltage I/O interface for mixed-supply systems. Available worldwide with a 6-week factory lead time.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- AVR128DB28-I/SP Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.5300(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 AVR128DB28-I/SP?
- 128 KB flash memory with 24 MHz AVR CPU for high-density embedded firmware applications
- Integrated 12-bit ADC, DAC, and Op-Amp enabling complete analog front-end without external components
- Multi-Voltage I/O (MVIO) supporting mixed 1.8 V and 3.3 V interfaces within a single 28-pin DIP package
- Zero-Cross Detector (ZCD) built-in for AC power control and phase detection in energy management designs
What is AVR128DB28-I/SP used for?
The AVR128DB28-I/SP excels in mixed-signal embedded control applications such as smart home energy monitors, motor drive controllers, and industrial sensor interfaces that demand both precision analog acquisition via its 12-bit ADC and flexible digital communication over UART, SPI, and TWI. Its integrated Op-Amp and DAC eliminate external analog components, reducing BOM cost in compact measurement devices. The MVIO feature enables direct interfacing with 1.8 V sensors alongside 3.3 V peripherals without level-shifting hardware.
What are the specifications of AVR128DB28-I/SP?
| Manufacturer Package Code | SPDIP-28 |
| Factory Lead Time | 6Weeks |
| YTEOL | 19 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | AVR |
| Clock Frequency-Max | 24MHz |
| DAC Channels | YES |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | R-PDIP-T28 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 22 |
| Number of I/O Lines | 22 |
| Number of Serial I/Os | 3 |
| Number of Timers | 5 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP28,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| RAM (bytes) | 16384 |
| RAM (words) | 16384 |
| ROM (words) | 131072 |
| ROM Programmability | FLASH |
| Speed | 24MHz |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| ## AVR128DB28-I/SP Alternates Showing results | Image |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.31.00.15 |
| Country of Origin | Thailand |
Where can I find the AVR128DB28-I/SP datasheet?
AVR128DB28-I/SP Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for AVR128DB28-I/SP?
Compatible alternatives and drop-in replacements for AVR128DB28-I/SP:
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Frequently Asked Questions
How does the 12-bit ADC in the AVR128DB28-I/SP compare to an 8-bit ADC for precision analog measurements?
The AVR128DB28-I/SP integrates a 12-bit ADC providing 4096 discrete voltage levels versus 256 from an 8-bit ADC, representing a 16x improvement in resolution. For a 3.3 V reference, this translates to an LSB of approximately 0.8 mV, enabling detection of small signal changes in temperature sensors or strain gauges within the 28-pin SPDIP package.
Which mixed-supply circuit designs benefit most from the Multi-Voltage I/O feature of the AVR128DB28-I/SP?
MVIO allows the AVR128DB28-I/SP to drive certain I/O ports at 1.8 V while the core runs at 3.3 V, making it suitable for designs that combine a 1.8 V Wi-Fi module with 3.3 V sensors. This eliminates the need for external level shifters on up to 8 pins, saving board space and reducing part count in IoT gateway and wearable device designs operating up to 85°C.
For a compact AC power control board, how does the Zero-Cross Detector in the AVR128DB28-I/SP simplify firmware design?
The integrated ZCD in the AVR128DB28-I/SP automatically triggers an interrupt at each 50 Hz or 60 Hz AC zero crossing, enabling precise TRIAC firing control without discrete optocoupler-based zero-cross detection circuits. This reduces external component count by 3-5 parts and achieves phase-angle control accuracy within ±1° at 60 Hz in dimmer, heater, and motor speed applications.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.4300 | $3.43 |
| 30+ | $3.2000 | $96.00 |
| 40+ | $3.1900 | $127.60 |
| 100+ | $2.9000 | $290.00 |
| 1000+ | $2.6600 | $2660.00 |
| 5000+ | $2.5300 | $12650.00 |
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