ANALOG DEVICES ADM3051 Service Manual

High Speed Industrial CAN Transceiver

V

with Bus Protection for 24 V Systems

Data Sheet

FEATURES

Physical layer CAN transceiver
5 V operation on V
Complies with ISO 11898 standard
High speed data rates up to 1 Mbps
Short-circuit protection on CANH and CANL against shorts to

power/ground in 24 V systems
Unpowered nodes do not disturb the bus
Connect 110 or more nodes on the bus
Slope control for reduced EMI
Thermal shutdown protection
Low current standby mode
Industrial operating temperature range (−40°C to +125°C)
Available in 8-lead SOIC package

APPLICATIONS

CAN data buses
Industrial field networks
DeviceNet applications
CanOpen, CanKingdom

CC

ADM3051

FUNCTIONAL BLOCK DIAGRAM

CC

THERMAL

SHUTDOWN

V

TxD

RS

RxD

REF

ADM3051

D

MODE

VOLTAGE

REFERENCE

Figure 1.

R

CANH
CANL

GND

10029-001

GENERAL DESCRIPTION

The ADM3051 is a controller area network (CAN) physical
layer transceiver allowing a protocol layer CAN controller to
access the physical layer bus. The ADM3051 complies with
the ISO 11898 standard. It is capable of running at data rates up
to 1 Mbps.

The device has current-limiting and thermal shutdown features
to protect against output short circuits and situations where the
bus may be shorted to ground or power terminals in 24 V bus
power systems. The part is fully specified over the industrial
temperature range of −40°C to +125°C and is available in an
8-lead SOIC package.

Three operating modes are available: high speed, slope control,
and standby. Pin 8 (RS) is used to select the operating mode.
The low current standby mode can be selected by applying a
logic high to RS.

The device can be set to operate with slope control to limit EMI
by connecting RS with a resistor to ground to modify the rise
and fall of slopes. This mode facilitates the use of unshielded
cables. Alternatively, disabling slope control by connecting RS
to ground allows high speed operation. Shielded cables or other
measures to control EMI are necessary in this mode.

Rev. 0

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rights of third parties that may result from its use. Specifications subject to change without notice. No
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Tel: [phone] www.analog.com
Fax: [phone] ©2011 Analog Devices, Inc. All rights reserved.

ADM3051 Data Sheet

TABLE OF CONTENTS

Features.............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Timing Specifications .................................................................. 4

Absolute Maximum Ratings............................................................ 5

ESD Caution.................................................................................. 5

Pin Configuration and Function Descriptions............................. 6

REVISION HISTORY

9/11—Revision 0: Initial Revision

Typical Performance Characteristics..............................................7

Test Circuits and Switching Characteristics................................ 11

Circuit Description......................................................................... 13

CAN Transceiver Operation..................................................... 13

Operational Modes .................................................................... 13

Truth Tables................................................................................. 13

Thermal Shutdown .................................................................... 13

Applications Information.............................................................. 14

Outline Dimensions....................................................................... 15

Ordering Guide............................................................................... 15

Rev. 0 | Page 2 of 16

Data Sheet ADM3051

SPECIFICATIONS

All voltages relative to ground (Pin 2); 4.5 V ≤ VCC ≤ 5.5 V. TA = −40°C to +125°C, RL = 60 Ω, IRS > −10 μA, unless otherwise noted. All
typical specifications are at T

Table 1.

Parameter Symbol Min Typ Max Unit Test Conditions

SUPPLY CURRENT ICC

Dominant State 78 mA V

Recessive State 10 mA V

Standby State 275 µA VRS = VCC, I

DRIVER

Logic Inputs

Input Voltage High VIH 0.7 VCC VCC + 0.3 V Output recessive
Input Voltage Low VIL −0.3 +0.3 VCC V Output dominant
CMOS Logic Input Current High IIH −200 +30 µA V
CMOS Logic Input Current Low IIL −100 −600 µA V

Differential Outputs

Recessive Bus Voltage V
Off-State Output Leakage Current ILO −2 +2 mA −2 V < (V

I

CANH Output Voltage V
CANL Output Voltage V

Differential Output Voltage VOD 1.5 3.0 V
V
V

Short-Circuit Current, CANH I

I

Short-Circuit Current, CANL I
RECEIVER

Differential Inputs

Voltage Recessive V

−1.0 +0.4 V

Voltage Dominant V

1.0 5.0 V

Input Voltage Hysteresis V

CANH, CANL Input Resistance RIN 5 25 kΩ

Differential Input Resistance R

Logic Outputs

Output Voltage High VOH 0.8 V CCVCC V I

Output Voltage Low VOL 0 0.2 VCC V I

V

Short-Circuit Current |I
VOLTAGE REFERENCE

Reference Output Voltage V
V
STANDBY/SLOPE CONTROL

Input Voltage for Standby Mode V

Current for Slope Control Mode ISL −10

Slope Control Mode Voltage V 0.4

1

In

standby, V = 4.75 V to 5.25 V.

CC

= 25°C, VCC = 5 V, unless otherwise noted.

A

, V

CANH

LO

CANH

CANL

OD

OD

SCCANH

SCCANH

SCCANL

IDR

IDD

HYS

DIFF

OL

OS OUT CC

REF

REF CC CC RS REF

STB

OPE

SLOPE CC CC

2.0 3.0 V

CANL

−10 +10 mA −5 V < (V

3.0 4.5 V

0.5 2.0 V

1.5 V

−500 +50 mV

−200 mA V

−100 mA V

200 mA V

−1.0 +0.5 V

0.9 5.0 V

150 mV

20 100 kΩ

0 1.5 V I
| 120 mA V = GND or V

2.025 3.025 V VRS = 1 V, |I

0.4 V 0.6 V V V = 4 V, |I | = 5 A

0.75 V CC V

−200 µA

V 0.6 V V

= 1 V

TxD

= 4 V; R

TxD

= 4 V

TxD

= 1 V

TxD

V

= 4 V, RL = ∞, see Figure 23

TxD

V

= 1 V, see Figure 23

TxD

V

= 1 V, see Figure 23

TxD

V

= 1 V, see Figure 23

TxD

V

= 1 V, RL = 45 Ω, see Figure 23

TxD

V

= 4 V, RL = ∞, see Figure 23

TxD

= −5 V

CANH

= −36 V

CANH

= 36 V

CANL

−2 V < V
V = 4.75 V to 5.25 V, C = 30 pF

CC L

−7 V < V
C = 30 pF

L

−2 V < V
= 4.75 V to 5.

CC

−7 V < V

C = 30 pF

L

See

Figure 26

= −100 µA

OUT

= 1 mA

OUT

= 10 mA

OUT

CANL

CANL

CANL

CANL

CANL

CANL

TxD

1

REF

= 47 kΩ

SLOPE

= I

= I

= 0 mA, TA < 90°C

RxD

VREF

, V

) < 7 V

CANH

, V

) < 36 V

CANH

, V

<7 V, see Figure 25,

CANH

, V

<12 V, see Figure 25,

CANH

, V

<7 V, see Figure 25,

, V

CANH

CANH

= 30 pF

25 V, CV

L

<12 V, see Figure 25,

| = 50 A

Rev. 0 | Page 3 of 16

ADM3051 Data Sheet

TIMING SPECIFICATIONS

All voltages are relative to ground (Pin 2); 4.5 V ≤ VCC ≤ 5.5 V. TA = −40°C to +125°C, unless otherwise noted.

Table 2.

Parameter Symbol Min Typ Max Unit Test Conditions

DRIVER

Maximum Data Rate 1 Mbps VRS = 1 V

t

Propagation Delay from TxD On to

Bus Active

Propagation Delay from TxD Off to

Bus Inactive

RECEIVER

Propagation Delay from TxD On to

Receiver Active

440 600 ns

Propagation Delay from TxD Off to

Receiver Inactive

290 400 ns

Bus Dominant to RxD Low t

CANH, CANL Slew Rate |SR| 7 V/s

TIME TO WAKE-UP FROM STANDBY t

50 ns

onTxD

40 80 ns

t

offTxD

55 120 ns

t

onRxD

t

90 190 ns

offRxD

3 s

dRxDL

20 s V

WAKE

= 1 V, RL = 60 Ω, CL = 100 pF,

V

RS

see Figure 24, Figure 27

= 1 V, RL = 60 Ω, CL = 100 pF,

V

RS

see Figure 24, Figure 27

= 1 V, RL = 60Ω, CL = 100 pF,

V

RS

see Figure 24, Figure 27

= 47 kΩ, RL = 60 Ω, CL = 100 pF,

R

SLOPE

see Figure 24, Figure 27

= 0 Ω, RL = 60 Ω, CL = 100 pF,

R

SLOPE

see Figure 24, Figure 27

= 47 kΩ, RL = 60 Ω, CL = 100 pF,

R

SLOPE

see Figure 24, Figure 27
V

RS

= 4 V, V

= 4 V, RL = 60 Ω, CL = 100 pF,

TxD

see Figure 24, Figure 29

= 47 kΩ, RL = 60 Ω, CL = 100 pF,

R

SLOPE

see Figure 24, Figure 27

= 1 V, see Figure 28

TxD

Rev. 0 | Page 4 of 16

Data Sheet ADM3051

ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter Rating

VCC −0.3 V to +7 V
Digital Input Voltage

TxD −0.3 V to VCC + 0.3 V

Digital Output Voltage

RxD −0.3 V to VCC + 0.3 V
CANH, CANL −36 V to +36 V
V

−0.3 V to VCC + 0.3 V

REF

RS −0.3 V to VCC + 0.3 V
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −55°C to +150°C
ESD (Human Body Model) on All Pins 4 kV
Lead Temperature

Soldering (10 sec) 300°C

Vapor Phase (60 sec) 215°C

Infrared (15 sec) 220°C
θJA Thermal Impedance 110°C/W
TJ Junction Temperature 150°C

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

ESD CAUTION

Rev. 0 | Page 5 of 16