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Analog Devices ADUM121N1WBRZ — Digital Isolators
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Analog Devices / Digital Isolators

ADUM121N1WBRZ Digital Isolator, 150Mbps, 3000Vrms, 8-SOIC

MPN ADUM121N1WBRZ
End of Life Spot Stock · 24-48h Dispatch 100% Original Sealed

Analog Devices ADUM121N1WBRZ, Automotive series, General Purpose digital isolator, 2-channel unidirectional, 150Mbps data rate, 3000Vrms isolation, 75kV/µs CMTI, 1.7V–5.5V supply, -40°C to 125°C, 8-SOIC package, Tube.

In Stock: 477 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$2.81 / pc
Direct Purchase Ready
Volume Pricing Breaks Confirmed upon quotation
1+ pcs
$2.81
10+ pcs
$2.53
30+ pcs
$2.30
100+ pcs
$2.08
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$2.81 / ea

477 in stock — maximum per order · 3–4 days lead time

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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (18)
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supply Voltage 1.7V ~ 5.5V
ALT
Facing long factory lead times or allocation on ADUM121N1WBRZ? Verified pin-compatible alternatives available with active Shenzhen stock and 100% solder-ready footprint match.
View Pin Alternates (3)

Full Technical Specifications

18 Parameters
ADUM121N1WBRZ specifications
Parameter / AttributeSpecification / Value
TypeGeneral Purpose
SeriesAutomotive
Channel typeUnidirectional
MountingSurface Mount
Supply voltage1.7V ~ 5.5V
Voltage - isolation3000Vrms
Isolated powerNo
Operating temperature-40°C ~ 125°C
Pulse width distortion3ns
PackageTube
Data rate150Mbps
TechnologyMagnetic Coupling
Case8-SOIC (0.154\", 3.90mm Width)
Channels2
Inputs - side 1/Side 21/1
Rise (Fall time)2.5ns, 2.5ns
Propagation delay tpLH (tpHL)13ns, 13ns
Common mode transient immunity75kV/µs
100% Footprint Match · Solder-Ready (No PCB Redesign Needed)

Need Stock or a Drop-in Second-Source for ADUM121N1WBRZ?

Package: SOIC-8 (narrow body) · Pin-compatible replacements with immediate Shenzhen spot stock

Footprint Match 98%
Supply Chain & Allocation Reality:

The ADuM120x pair is the digital isolator that replaced optocouplers across industrial designs: two channels on a magnetic barrier instead of an LED, 2.5kV of isolation in an eight-pin SOIC, supplies from 2.7V to 5.5V that made 3.3V-to-5V level translation and isolation one component. The naming is a single decision - ADuM1200 carries both channels in one direction, ADuM1201 is the 1/1 bidirectional part - and the generation upgrade is documented pin-for-pin: the N-family maps onto the classic sockets with faster rates and fail-safe output options. The substitution mistake in this family is one character wide and completely fatal to the signal path.

Verified Pin-Compatible Replacements (3 verified alternatives)

ADuM1200 Analog Devices SOIC-8
Pin-to-Pin (Minor Clock/Init Tuning)
Availability & Target Pricing:

The 2/0 Member - Same Socket, Different Direction

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The same dual-channel isolator with both channels pointing the same way (2/0 against the 1201s 1/1 direction split): identical timing, identical supplies, opposite topology.

2.7V to 5.5V on either side with independent level translation; 2.5kV RMS isolation.

Compatibility & Drop-In Notes: The substitution rule: same socket, same speed grades (A/B/C at 1/10/25Mbps), same everything except the arrows. A 1200 in a 1201 socket isolates half the bus and inverts the other halfs role - the failure looks like a protocol bug, not a component mistake.
Package & Solder Footprint: Identical SOIC-8 footprint.
Shenzhen Warehouse Stock & MOQ: Stocked as the pair; label the two drawers distinctly.
Request Volume Quote for ADuM1200 Compare ADUM121N1WBRZ vs ADuM1200 Spec Matrix
ADuM121N1 Analog Devices SOIC-8
Pin-to-Pin (Minor Clock/Init Tuning)
Availability & Target Pricing:

The Pin-Compatible Modern Generation

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The N-generation replacement documented as pin-compatible with the ADuM1201 (the ADuM120N1 maps to the ADuM1200): up to 150Mbps, lower propagation delay, 100kV/us common-mode transient immunity and selectable fail-safe output (N0 against N1).

1.8V to 5V supplies; 3kV RMS isolation class.

Compatibility & Drop-In Notes: The upgrade direction is calm: pin-compatible into the classic sockets with better performance. The one review: which fail-safe behavior the design assumed during power sequencing - check the N0/N1 suffix against the board behavior before standardizing.
Package & Solder Footprint: Same SOIC-8 land pattern.
Shenzhen Warehouse Stock & MOQ: Active production; the forward buy for the socket.
Request Volume Quote for ADuM121N1 Compare ADUM121N1WBRZ vs ADuM121N1 Spec Matrix
ADuM1285 Analog Devices SOIC-8
Pin-to-Pin (Minor Clock/Init Tuning)
Availability & Target Pricing:

The Direction-Swapped N Option

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The N-generation mapping option for same-direction duty (the N0 variants map onto the 1285/1286) with fail-safe-high output behavior.

Modern low-voltage envelope; same isolation class.

Compatibility & Drop-In Notes: In repair, the pattern to keep: the N family is a small matrix of direction x data-rate x fail-safe - three coordinates, all encoded in the suffix. Any substitution ends by checking the coordinate, not the family name.
Package & Solder Footprint: SOIC-8 shared land pattern.
Shenzhen Warehouse Stock & MOQ: Stocked with the N row; documented ordering table.
Request Volume Quote for ADuM1285 Compare ADUM121N1WBRZ vs ADuM1285 Spec Matrix
Buyer & Quality Checklist for Sourcing Alternatives
  • The channel map is the part number: ADuM1200 is 2/0 (both channels one direction), ADuM1201 is 1/1 - the bidirectional dual. The bodies are identical; the digit is the entire topology.
  • Grades A/B/C set data rate (about 1/10/25 Mbps): the slow grade in a fast socket works until the bus speed is actually used - in repair, match the grade letter when the original design ran near its limit.
  • The N-generation is documented pin-compatible onto the classic row (120N1 onto 1200, 121N1 onto 1201) with far higher rates and selectable fail-safe outputs - the upgrade path is real, and the fail-safe suffix is the new thing to read.
  • Independent supplies on the two sides are the feature: 3.3V logic on one side, 5V on the other, each at its own level. The isolation barrier is also the level translator - do not add level shifters by reflex when repairing.
  • Isolation grade differences live in the body variants (wide-body and higher-kV members): the 8-pin narrow package is one class - substituting across bodies is a creepage decision, not a pin decision.
  • In field failures, check both supplies before the part: a dead isolator side that lost its rail reads exactly like a dead isolator. The part is usually the messenger in a power-sequencing story.
Frequently Asked Technical Questions

Q: What is the difference between ADuM1200 and ADuM1201?

A: Channel direction only: ADuM1200 routes both channels the same way (2/0), ADuM1201 provides one channel each direction (1/1). Identical package, supplies and timing - the one-digit rule decides whether a bus crosses the barrier both ways.

Q: Can the N-generation replace the classic ADuM120x?

A: Pin-compatible per the documented mapping (ADuM120N1 onto ADuM1200, ADuM121N1 onto ADuM1201) with higher speed, lower delay and selectable fail-safe output - verify the N0/N1 fail-safe suffix against the power-up behavior the board expects.

Q: Do I need level shifting around a digital isolator?

A: No - the two sides carry independent 2.7-5.5V supplies (1.8-5V on the N row), so the isolator is also the translator. Repair habits from optocoupler circuits that add shifters waste parts and add failure points.

Technical Details & Description

Two-channel digital isolator for automotive signal isolation

The ADUM121N1WBRZ is a two-channel, unidirectional digital isolator from Analog Devices, part of the Automotive series. It uses magnetic coupling to provide 3000Vrms isolation between input and output, with a data rate of 150Mbps and common-mode transient immunity of 75kV/µs. The wide supply range of 1.7V to 5.5V lets it bridge 1.8V, 2.5V, 3.3V, and 5V logic domains without external level shifters.

75kV/µs CMTI — why it matters for motor-drive and inverter designs

The 75kV/µs minimum common-mode transient immunity is the spec that keeps data intact when fast-switching SiC or IGBT edges slam the isolation barrier. In a traction inverter, the high-side gate driver reference jumps hundreds of volts in nanoseconds; a lower CMTI part would glitch or latch, corrupting the PWM pattern. This part's 75kV/µs rating clears that edge without retransmission or bit errors. Propagation delay is 13ns max, with pulse-width distortion held to 3ns. Rise and fall times are 2.5ns typical. These numbers keep the timing budget tight enough for 150Mbps SPI or 5Mbps CAN FD without skew eating into setup-and-hold margins.

Frequently asked questions

Is ADUM121N1WBRZ automotive grade?

Yes. The Automotive series designation indicates AEC-Q100 qualification for automotive reliability standards.

What is the maximum data rate of ADUM121N1WBRZ?

The maximum data rate is 150Mbps. This supports isolated SPI, UART, and CAN FD interfaces without bit-rate bottlenecks.

Is ADUM121N1WBRZ compatible with 3.3V?

Yes. The supply voltage range is 1.7V to 5.5V, so it operates directly on 3.3V rails on both sides of the isolation barrier. It also works with 1.8V, 2.5V, and 5V logic without level shifters.

What is the equivalent of ADUM121N1WBRZ?

The closest functional equivalent is the ADUM121N1BRZ, which shares the same 2-channel unidirectional architecture, 150Mbps data rate, 3000Vrms isolation, 75kV/µs CMTI, and 8-SOIC package.

ADUM121N1WBRZ
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