MAX22028AWA+ Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The MAX22028AWA+ is a compact, isolated half-duplex RS-485/RS-422 transceiver from Analog Devices with AutoDirection Control, supporting data rates up to 500 kbps, a 5 V supply, and ±15 kV ESD protection in an 8-SOIC package.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MAX22028AWA+ Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.2100(MOQ 25)
- 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 MAX22028AWA+?
- Integrated galvanic isolation eliminates the need for external isolation components, reducing BOM count
- AutoDirection Control automatically switches between transmit and receive modes without external control signals
- Supports RS-485 and RS-422 standards with differential Schmitt-trigger inputs for robust noise immunity
- ±15 kV ESD protection (HBM) on bus pins for reliable operation in harsh industrial environments
- Wide supply range with VDDA 3.0 V to 5.5 V and VDDB 4.75 V to 5.25 V, enabling flexible system designs
- Half-duplex architecture in a compact 8-SOIC_W 300 mil package, saving PCB space
What is MAX22028AWA+ used for?
The MAX22028AWA+ is designed for isolated industrial communication systems where RS-485 or RS-422 networks must withstand high common-mode voltages, ESD events, and electromagnetic interference. It is commonly deployed in PLCs, motor drive control links, building automation networks, and smart energy meters where galvanic isolation protects sensitive microcontrollers from bus transients. Its AutoDirection feature simplifies firmware by eliminating manual direction-control GPIO toggling in half-duplex RS-485 bus designs.
What are the specifications of MAX22028AWA+?
| Manufacturer Package Code | 8-SOIC_W-300_MIL |
| Date Of Intro | 2020-02-04 |
| YTEOL | 8.5 |
| Additional Feature | Also Require VDDB supply 4.75V to 5.25V and Supply current-Max 5.5mA |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-485; EIA-422 |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Out Swing-Min | 1.5V |
| Output Characteristics | DIFFERENTIAL |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Receive Delay-Max | 80ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 5.5mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.71V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 1000ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Where can I find the MAX22028AWA+ datasheet?
MAX22028AWA+ Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for MAX22028AWA+?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the AutoDirection Control feature of the MAX22028AWA+ simplify RS-485 network firmware?
AutoDirection Control automatically toggles the driver/receiver direction based on data flow, so firmware does not need to assert a separate DE/RE GPIO pin. This reduces latency to under 500 ns per transition and eliminates a common source of bus contention errors in half-duplex RS-485 networks running at up to 500 kbps.
What supply voltages does the MAX22028AWA+ require, and how much current does it draw?
The MAX22028AWA+ requires two supplies: VDDA from 3.0 V to 5.5 V for the logic side and VDDB from 4.75 V to 5.25 V for the bus side. Maximum combined supply current is 5.5 mA, making it suitable for low-power industrial nodes and bus-powered field devices.
In which industrial applications is the MAX22028AWA+ most effective as an isolated transceiver?
The MAX22028AWA+ excels in PLCs, motor drives, building automation systems, and smart meters that need ±15 kV ESD protection on RS-485 bus pins. Its 8-SOIC_W 300 mil package fits easily on a 2-layer board, and isolation ratings up to 2500 VRMS allow it to bridge 24 V fieldbus networks to 3.3 V microcontroller interfaces.
When should an engineer choose the MAX22028AWA+ over a non-isolated RS-485 transceiver such as the MAX3485?
Choose the MAX22028AWA+ when ground potential differences exceed ±12 V between nodes, or when bus cables run longer than 10 m in electrically noisy environments. Its integrated isolation removes the risk of latch-up and protects the host MCU, whereas non-isolated parts like the MAX3485 rely on board-level ground referencing and offer no common-mode protection beyond ±12 V.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $3.3060 | $82.65 |
| 100+ | $2.9951 | $299.51 |
| 280+ | $2.7335 | $765.38 |
| 1000+ | $2.2100 | $2210.00 |
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