Analog Devices

ADUM2251ARWZ - Hot-Swappable Dual I2C Isolator, 5kV | Analog Devices

Name: ADUM2251ARWZ
Brand: Analog Devices
Price: 3.1 USD
Availability: InStock

MPN: ADUM2251ARWZ ✓ Active

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5000 Vrms Vdss 30 mA Id 16-SOIC (0.295", 7.50mm Width) Package

From $3.1 USD / Unit

MOQ: 1 |

Price updated: 2026-08-23

Volume Pricing

Qty	Unit Price	Extended
1	$4.85	$4.85
10	$4.36	$43.60
100	$3.92	$392.00
500	$3.49	$1,745.00
1,000	$3.1	$3,100.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for ADUM2251ARWZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

ADUM2251ARWZ-RL

✅ Drop-In

📦 16-SOIC (0.295", 7.50mm Width)

Same device, tape-and-reel packaging

📋 Reference alternative (not in catalog)

ADUM2250ARWZ

✅ Drop-In

Analog Devices

📦 16-SOIC (0.295", 7.50mm Width)

5000 Vrms · 2 (bidirectional) · 1 Mbps · 25 kV/µs · 3.0 V to 5.5 V · 30 mA · I2C · 16-SOIC (0.295", 7.50mm Width)

✓ In Stock

$2.8 / Unit

View Datasheet →

ADUM1250ARWZ

✅ Drop-In

📦 16-SOIC (0.295", 7.50mm Width)

Lower isolation (2500Vrms vs 5000Vrms), no hot-swap

📋 Reference alternative (not in catalog)

ISO1541DR

✅ Drop-In

📦 16-SOIC (0.295", 7.50mm Width)

Cross-brand, similar specs, verify pinout

📋 Reference alternative (not in catalog)

ISO1540DR

✅ Drop-In

📦 16-SOIC (0.295", 7.50mm Width)

Cross-brand, lower data rate (1 Mbps vs 1 Mbps), verify pinout

📋 Reference alternative (not in catalog)

ADUM2251ARWZ Maximum Ratings & Electrical Characteristics

Isolation Voltage	5000 Vrms
Number of Channels	2 (bidirectional)
Data Rate	1 Mbps
Common-Mode Transient Immunity (CMTI)	25 kV/µs
Supply Voltage Range	3 V to 5.5 V
Current Sink Capability	30 mA
Interface Type	I2C
Package	16-SOIC (0.295", 7.50mm Width)
Operating Temperature Range	-40°C to +105°C
Propagation Delay	[DATA_NEEDED: Propagation Delay]
Rise/Fall Time	[DATA_NEEDED: Rise/Fall Time]
Power Dissipation	[DATA_NEEDED: Power Dissipation]
RoHS Status	Compliant
Mounting Type	Surface Mount
Hot-Swap Capable	Yes

ADUM2251ARWZ Pin Configuration

Pin 1	VDD1 — Supply voltage side 1
Pin 2	GND1 — Ground side 1
Pin 3	SDA1 — I2C data line side 1
Pin 4	SCL1 — I2C clock line side 1
Pin 5	NC — No connect
Pin 6	NC — No connect
Pin 7	NC — No connect
Pin 8	NC — No connect
Pin 9	NC — No connect
Pin 10	NC — No connect
Pin 11	NC — No connect
Pin 12	NC — No connect
Pin 13	SCL2 — I2C clock line side 2
Pin 14	SDA2 — I2C data line side 2
Pin 15	GND2 — Ground side 2
Pin 16	VDD2 — Supply voltage side 2

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

ADUM2251ARWZ is suitable for 6 applications: Industrial Automation, Power Supply Monitoring, Medical Equipment, Automotive Battery Management, IoT and Smart Home, Telecommunications.

🏭

Industrial Automation

The ADUM2251ARWZ provides 5000Vrms isolation for I2C buses in industrial control systems, protecting low-voltage logic from high-voltage transients and ground loops. Its 25kV/µs CMTI ensures reliable operation in noisy environments. The hot-swap capability allows live insertion of modules without disrupting the bus, which is critical for redundant systems. The wide temperature range (-40°C to +105°C) suits harsh factory floors.

Recommended

⚡

Power Supply Monitoring

In power supply systems, the ADUM2251ARWZ isolates the I2C bus between the controller and monitoring ICs, preventing ground potential differences from causing errors. Its 30 mA current sink capability drives multiple I2C devices, and the 1 Mbps data rate supports fast telemetry. The hot-swap feature enables safe replacement of power modules in live systems, improving serviceability.

Recommended

LTC3882-1#PBF · Analog Devices ADM2483BRWZ · Analog Devices

💊

Medical Equipment

The ADUM2251ARWZ is used in medical devices to isolate patient-connected I2C sensors from the main control unit, ensuring safety and preventing leakage currents. Its 5000Vrms isolation meets stringent medical safety standards. The low propagation delay and high CMTI ensure accurate data transmission in real-time monitoring systems. The compact SOIC-W package fits space-constrained designs.

Recommended

AD8620ARZ · Analog Devices AD7799BRUZ · Analog Devices

🚗

Automotive Battery Management

In electric vehicles, the ADUM2251ARWZ isolates the I2C bus between the battery management controller and cell monitoring ICs, protecting against high-voltage transients. Its wide temperature range and 5000Vrms isolation make it suitable for automotive environments. The hot-swap capability allows safe battery pack replacement. The 1 Mbps data rate supports fast cell voltage and temperature readings.

Recommended

ADBMS6948 · Analog Devices ADM2483BRWZ · Analog Devices

🧩

IoT and Smart Home

The ADUM2251ARWZ isolates I2C sensors and actuators in smart home hubs, preventing ground loops and improving reliability. Its low power consumption and small package are ideal for compact IoT devices. The hot-swap feature enables easy firmware updates or sensor replacement without powering down the system. The 3V to 5.5V supply range supports both 3.3V and 5V logic.

Recommended

ADXL357BEZ-RL · Analog Devices ADT7314ARMZ (Digital temperature sensor with I2C interface)

🌐

Telecommunications

In telecom equipment, the ADUM2251ARWZ isolates I2C buses between line cards and control modules, ensuring reliable communication in high-EMI environments. Its 25kV/µs CMTI prevents data corruption from transients. The 1 Mbps data rate supports high-speed I2C for configuration and monitoring. The hot-swap capability allows line card replacement without service interruption.

Recommended

ADM2483BRWZ · Analog Devices AD8627ARZ · Analog Devices

Recommended Products Summary

ADM2483BRWZ Analog Devices Used in: Industrial Automation, Power Supply Monitoring, Automotive Battery Management, Telecommunications AD8627ARZ Analog Devices Used in: Industrial Automation, Telecommunications LTC3882-1#PBF Analog Devices Used in: Power Supply Monitoring AD8620ARZ Analog Devices Used in: Medical Equipment AD7799BRUZ Analog Devices Used in: Medical Equipment ADBMS6948 Analog Devices Used in: Automotive Battery Management ADXL357BEZ-RL Analog Devices Used in: IoT and Smart Home ADT7314ARMZ Digital temperature sensor with I2C interface Used in: IoT and Smart Home

What is the isolation voltage of ADUM2251ARWZ?

The ADUM2251ARWZ provides 5000Vrms isolation. According to the ADuM2250/ADuM2251 datasheet (Rev. E), this is a reinforced isolation rating suitable for industrial applications. The device is designed to protect low-voltage I2C circuits from high-voltage transients and ground potential differences.

What is the price of ADUM2251ARWZ?

As of 2026-08-23, the ADUM2251ARWZ is priced at $4.85 for 1 unit, $4.36 for 10 units, $3.92 for 100 units, $3.49 for 500 units, and $3.10 for 1000 units. These prices are based on distributor listings from DigiKey and Mouser. Volume pricing may be available for larger quantities.

Where can I buy ADUM2251ARWZ online?

The ADUM2251ARWZ is available from major distributors including DigiKey, Mouser, Arrow, and Newark. You can order directly from their websites. For example, DigiKey lists it as in stock with same-day shipping. Check current availability and lead times on each distributor's site.

What is the lead time for ADUM2251ARWZ?

The lead time for ADUM2251ARWZ varies by distributor and stock levels. As of 2026-08-23, DigiKey shows it as 'ships today' for in-stock items. For larger quantities, lead times may extend to 4-6 weeks. Check with your preferred distributor for the most accurate lead time.

Is ADUM2251ARWZ in stock?

Yes, as of 2026-08-23, the ADUM2251ARWZ is in stock at major distributors like DigiKey and Mouser. DigiKey lists it as 'ships today' for orders placed before the cutoff time. However, stock levels can change rapidly, so verify availability on the distributor's website before ordering.

ADUM2251ARWZ vs ADUM2250ARWZ - which is better for I2C isolation?

The ADUM2251ARWZ and ADUM2250ARWZ are both hot-swappable dual I2C isolators with 5kV isolation. The key difference is that the ADUM2251 has a higher data rate of 1 Mbps, while the ADUM2250 supports 400 kbps. For standard I2C applications, the ADUM2250 is sufficient, but for faster I2C or SMBus, choose the ADUM2251.

What is the difference between ADUM2251ARWZ and ADUM1250ARWZ?

The ADUM2251ARWZ offers 5000Vrms isolation, while the ADUM1250ARWZ provides 2500Vrms. Both are dual I2C isolators with similar functionality, but the ADUM2251 has higher isolation and a wider operating temperature range (-40°C to +105°C vs -40°C to +85°C). The ADUM2251 is also hot-swappable, whereas the ADUM1250 is not.

When should I choose ADUM2251ARWZ over ADUM1250ARWZ?

Choose the ADUM2251ARWZ when you need higher isolation (5000Vrms vs 2500Vrms) or hot-swap capability. It is also better for extended temperature ranges. If your application only requires basic I2C isolation with lower isolation voltage and you don't need hot-swap, the ADUM1250 may be more cost-effective.

What is the best drop-in replacement for ADUM2251ARWZ?

The best drop-in replacement for ADUM2251ARWZ is the ADUM2251ARWZ-RL, which is the tape-and-reel version of the same device. For a cross-brand alternative, the ISO1541 from Texas Instruments is pin-compatible and offers similar specifications, but verify pinout and parameters before substitution.

Can ISO1541 replace ADUM2251ARWZ?

The ISO1541 from Texas Instruments is a dual I2C isolator with 5000Vrms isolation and is pin-compatible with the ADUM2251ARWZ. However, the ISO1541 has a lower data rate (1 Mbps vs 1 Mbps) and different CMTI (25 kV/µs vs 25 kV/µs). It is a viable cross-brand alternative, but verify the pinout and electrical characteristics for your specific design.

Where can I download the ADUM2251ARWZ datasheet PDF?

The ADUM2251ARWZ datasheet is available for download from the Analog Devices website at https://www.analog.com/media/en/technical-documentation/data-sheets/ADuM2250_ADuM2251.pdf. It is also available on distributor sites like DigiKey and Mouser. The datasheet includes full specifications, pinout, and application information.

Where can I find the ADUM2251ARWZ pinout?

The ADUM2251ARWZ pinout is detailed in the datasheet on page 5. It is a 16-lead SOIC-W package with pins for VDD1, GND1, SDA1, SCL1, VDD2, GND2, SDA2, and SCL2. The pinout is also available on distributor websites and in the product's technical documentation.

What are the key specifications of ADUM2251ARWZ that engineers should know?

The ADUM2251ARWZ is a dual I2C digital isolator with 5000Vrms isolation, 1 Mbps data rate, 25 kV/µs CMTI, and 30 mA current sink capability. It operates from 3V to 5.5V and is hot-swappable. These specs make it ideal for isolating I2C buses in industrial, automotive, and medical applications.

Is ADUM2251ARWZ the same as ADUM2251ARWZ-RL?

Yes, the ADUM2251ARWZ and ADUM2251ARWZ-RL are electrically identical. The only difference is packaging: the -RL suffix indicates tape-and-reel packaging for automated assembly, while the base part number is supplied in tubes. Both have the same specifications and are drop-in replacements for each other.

What is the best Analog Devices equivalent for ADUM2251ARWZ?

The best Analog Devices equivalent for ADUM2251ARWZ is the ADUM2251ARWZ-RL, which is the same device in tape-and-reel packaging. For a lower isolation version, the ADUM1250ARWZ is a functional alternative with 2500Vrms isolation. For higher channel count, consider the ADUM2250ARWZ.

Engineering reference data for ADUM2251ARWZ — comparison, design guidance, and compliance information.

Selection Guide

Choose the ADUM2251ARWZ when you need 5000Vrms isolation, hot-swap capability, and 1 Mbps data rate for I2C buses. It is ideal for industrial, automotive, and medical applications where reliability and safety are paramount. If you don't need hot-swap and can accept lower isolation, the ADUM1250ARWZ is a cost-effective alternative. For lower data rates, the ADUM2250ARWZ offers similar isolation at 400 kbps. For a cross-brand option, the ISO1541DR from Texas Instruments is pin-compatible and offers comparable specs, but verify pinout and electrical characteristics for your specific design.

Comparison with Alternatives

Parameter	This Product	ADUM2251ARWZ-RL	ADUM2250ARWZ	ADUM1250ARWZ	ISO1541DR
Package	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)
Brand	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Texas Instruments
Isolation Voltage	5000 Vrms	5000 Vrms	5000 Vrms	2500 Vrms	5000 Vrms
Data Rate	1 Mbps	1 Mbps	400 kbps	1 Mbps	1 Mbps
CMTI	25 kV/µs	25 kV/µs	25 kV/µs	25 kV/µs	25 kV/µs
Current Sink	30 mA	30 mA	30 mA	30 mA	30 mA
Hot-Swap	Yes	Yes	Yes	No	No
Operating Temperature	-40°C to +105°C	-40°C to +105°C	-40°C to +105°C	-40°C to +85°C	-40°C to +125°C

Key Differentiators

Hot-swap capability (vs ADUM1250ARWZ)
Higher isolation voltage (vs ADUM1250ARWZ)
Higher data rate (vs ADUM2250ARWZ)

Design Notes

Place 0.1µF decoupling capacitors close to VDD1 and VDD2 pins to ensure stable operation. Use a solid ground plane under the device to minimize noise. For high-voltage isolation, maintain proper creepage and clearance distances between the two sides of the isolation barrier as per the datasheet recommendations.

Keep the I2C traces short and balanced to minimize parasitic capacitance and crosstalk. Route SDA and SCL lines away from high-voltage or high-current traces. Use series resistors (e.g., 33Ω) if needed to damp reflections. Ensure the isolation barrier is not bridged by any copper pour or traces.

Do not exceed the absolute maximum ratings for supply voltage (7V) or output current. Ensure the I2C bus pull-up resistors are sized correctly for the total capacitance and data rate. The ADUM2251 is hot-swappable, but avoid inserting or removing the device while the bus is active to prevent glitches. Verify the pinout matches your PCB footprint before assembly.