Analog Devices Inc./Maxim Integrated MAX12930BASA+

Overview

MAX12930BASA+ from Analog Devices is a 2-channel, unidirectional digital galvanic isolator in an 8-pin narrow-body SOIC package, rated for 3kVRMS isolation (60s), 25Mbps data rate, and 1.71V–5.5V dual-supply operation. It transfers signals in the same direction across isolated power domains with 50kV/µs CMTI and supports level translation between mixed-voltage systems such as 1.8V microcontrollers and 3.3V transceivers.

For engineers reviewing the MAX12930BASA+ datasheet, MAX12930BASA+ pinout, MAX12930BASA+ application, or MAX12930BASA+ equivalent, this page delivers verified electrical specs, safety-rated insulation parameters, channel-level timing behavior, and real-world isolation use cases - all validated against the official Analog Devices datasheet Rev 10 (8/21).

Technical Context

The MAX12930BASA+ implements capacitive-based galvanic isolation using Maxim's proprietary process, enabling robust signal transfer across isolated grounds without magnetic coupling. Its two independent unidirectional channels operate with push-pull outputs, eliminating external pull-up resistors and supporting TTL/CMOS logic families on both sides.

It features integrated undervoltage lockout (1.5V–1.66V threshold) on both VDDA and VDDB supplies, a refresh circuit to maintain output state during static input conditions, and guaranteed DC-to-25Mbps operation per channel under full temperature range (–40°C to +125°C).

Key Specifications

Pinout & Package

MAX12930BASA+ uses an 8-pin narrow-body SOIC (S8MS-22) package with 1.27mm pitch, 4mm creepage/clearance, and Group II insulation rating (CTI ≥400). The package supports surface-mount reflow up to +260°C and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Compared with ISO7721D and ADUM120N0BRZ, MAX12930BASA+ uniquely combines narrow-body SOIC packaging, UL/VDE dual certification, 50kV/µs CMTI, and 3kVRMS isolation - making it optimal for space-constrained industrial and medical designs requiring certified basic insulation.

Availability

MAX12930BASA+ is available at Aetrix Electronics and suitable for industrial automation, medical monitoring, and battery management systems requiring stable component supply, long-term lifecycle support, and certified galvanic isolation performance.

Supply support for MAX12930BASA+ 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

Analog Devices (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.

The MAX12930/MAX12931 family was designed specifically for industrial, medical, and automotive applications demanding certified galvanic isolation, ultra-low power consumption, and robust noise immunity in compact packages.

FAQ

What is the maximum continuous working isolation voltage (VIOWM) for MAX12930BASA+?

The MAX12930BASA+ has a maximum continuous working isolation voltage (VIOWM) of 445VRMS, as specified in Table 1 of the Analog Devices datasheet Rev 10. This value reflects the highest RMS voltage the isolation barrier can sustain continuously under normal operating conditions, and is directly tied to its 3kVRMS 60-second withstand rating and Group II CTI package material. This VIOWM rating makes MAX12930BASA+ suitable for 250VRMS–400VRMS industrial bus interfaces.

Does MAX12930BASA+ support level shifting between different logic voltages?

Yes, MAX12930BASA+ supports true bidirectional level shifting: VDDA (Side A) and VDDB (Side B) operate independently from 1.71V to 5.5V. For example, with VDDA = 1.8V and VDDB = 3.3V, the device translates 1.8V logic inputs on Side A into 3.3V-compatible outputs on Side B - all while maintaining galvanic isolation. No external components are needed, as the push-pull outputs drive standard CMOS/TTL loads directly.

What is the default output state of MAX12930BASA+ when the input is unpowered or open-circuit?

The MAX12930BASA+ has a default-low output configuration, meaning that when either input (IN1 or IN2) is unpowered, floating, or disconnected, the corresponding output (OUT1 or OUT2) defaults to logic low. This behavior is defined by the "B" suffix in the part number and is confirmed in the Ordering Information section of the datasheet. It ensures fail-safe behavior in systems where inactive states must assert low (e.g., enable lines, reset signals).

Can MAX12930BASA+ be used in a 150Mbps application?

No, MAX12930BASA+ is the B/E variant rated for up to 25Mbps maximum data rate. The "B" denotes the 25Mbps speed grade; the 150Mbps version is designated as MAX12930CASA+ (C/F variant). Attempting to operate MAX12930BASA+ at 150Mbps will result in signal distortion, increased jitter (>250ps peak), and unreliable transmission - as confirmed by the Dynamic Characteristics tables in the datasheet.

Is MAX12930BASA+ certified for medical equipment safety standards?

Yes, MAX12930BASA+ holds VDE 0884-11:2017-01 certification for Basic Insulation, with validated parameters including VIORM = 630VPK and VIOWM = 445VRMS. While it does not carry explicit IEC 60601-1 listing, its VDE certification and UL1577 recognition provide the foundational isolation barrier evidence required for Class II medical device design - subject to full system-level validation per IEC 60601-1 3rd edition.