Specification	ADUM1255ASA+T

Channel Type	Unidirectional
Common Mode Transient Immunity (Min) [Min]	100 V/ns
Data Rate	2 MHz
Inputs - Side 1/Side 2 [custom]	2
Inputs - Side 1/Side 2 [custom]	1
Isolated Power	True, False
Mounting Type	Surface Mount
Number of Channels	2
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Package / Case	0.154 in
Package / Case	8-SOIC
Package / Case	3.9 mm
Propagation Delay tpLH / tpHL (Max) [Max] [custom]	128.4 ns
Propagation Delay tpLH / tpHL (Max) [Max] [custom]	95.8 ns
Pulse Width Distortion (Max) [Max]	94.2 ns
Rise / Fall Time (Typ)	20.3 ns
Rise / Fall Time (Typ)	-
Supplier Device Package	8-SOIC
Technology	Magnetic Coupling
Type	I2C, CAN
Voltage - Isolation	3000 VAC
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.25 V

ADuM1255 Series

I2C Isolator with Unidirectional SCL, Idle-bus Hotswap and Low VOL

Part	Number of Channels	Data Rate	Package / Case	Channel Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Technology	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Common Mode Transient Immunity (Min) [Min]	Pulse Width Distortion (Max) [Max]	Rise / Fall Time (Typ)	Rise / Fall Time (Typ)	Type	Supplier Device Package	Inputs - Side 1/Side 2 [custom]	Inputs - Side 1/Side 2 [custom]	Propagation Delay tpLH / tpHL (Max) [custom]	Propagation Delay tpLH / tpHL (Max) [custom]	Propagation Delay tpLH / tpHL (Max) [Max] [custom]	Propagation Delay tpLH / tpHL (Max) [Max] [custom]	Voltage - Isolation	Package / Case	Package / Case
Analog Devices Inc./Maxim Integrated ADUM1255AWA+T	3	2 MHz	8-SOIC (0.295" 7.50mm Width)	Unidirectional	2.25 V	5.5 V	Magnetic Coupling	Surface Mount	125 °C	-40 C	100 V/ns	94.2 ns	20.3 ns	-	CAN I2C	8-SOIC	2	1	50 ns	133.3 ns
Analog Devices Inc./Maxim Integrated ADUM1255ASA+T	2	2 MHz	8-SOIC	Unidirectional	2.25 V	5.5 V	Magnetic Coupling	Surface Mount	125 °C	-40 C	100 V/ns	94.2 ns	20.3 ns	-	CAN I2C	8-SOIC	2	1			128.4 ns	95.8 ns	3000 VAC	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated ADUM1255ASA+	2	2 MHz	8-SOIC	Unidirectional	2.25 V	5.5 V	Magnetic Coupling	Surface Mount	125 °C	-40 C	100 V/ns	94.2 ns	20.3 ns	-	CAN I2C	8-SOIC	2	1			128.4 ns	95.8 ns	3000 VAC	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated ADUM1255AWA+	3	2 MHz	8-SOIC (0.295" 7.50mm Width)	Unidirectional	2.25 V	5.5 V	Magnetic Coupling	Surface Mount	125 °C	-40 C	100 V/ns	94.2 ns	20.3 ns	-	CAN I2C	8-SOIC	2	1	50 ns	133.3 ns

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Tape & Reel (TR)	2500	$ 1.89	1w
		5000	$ 1.85

Description

General part information

ADuM1255 Series

The ADuM1255 offers two open-drain channels, one unidirectional and one bidirectional for applications, such as I2C, that require data to be transmitted in both directions on the same line, but have a unidirectional clock. To prevent latch-up action, side 1 outputs comprise special buffers that regulate the logic-low voltage at 0.64V, and the input logic-low threshold is at least 50mV lower than the output logic-low voltage. Side 2 features conventional buffers that do not regulate logic-low output voltage.The ADuM1255 features independent 2.25V to 5.5V supplies on both side 1 and side 2 of the isolator. The device operates up to 2MHz.The ADuM1255 provides a disturbance-free bus connection for hot-plug connections on side 2 by first precharging the bus pins and then monitoring the bus state for either an idle bus or detection of an I2C stop condition before connecting side 1 and side 2.The ADuM1255 is available in 8-pin narrow- and widebody SOIC packages. The devices are rated for operation at ambient temperatures of -40°C to +125°C.ApplicationsIsolated I2C/SMBus InterfaceBattery Management SystemsPower Over Ethernet (PoE)Motor Control Systems

Documents

Technical documentation and resources

ADUM1255ASA+T | Datasheet

Datasheet

Package Drawing - S8MS+24A

Package Drawing