High Speed Industrial CAN Transceiver
with Bus Protection for 24 V Systems
Data Sheet
ADM3051
Rev. A Document Feedback
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Tel: 781.329.4700 ?2011–2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Physical layer CAN transceiver
5 V operation on VCC
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
FUNCTIONAL BLOCK DIAGRAM
ADM3051
TxD
RS
RxD
V
REF
V
CC
MODE
THERMAL
SHUTDOWN
VOLTAGE
REFERENCE
D
R
CANH
CANL
GND 100
29-
0
01
Figure 1.
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.
ADM3051 Data Sheet
Rev. A | Page 2 of 16
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?
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?
REVISION HISTORY
5/2016—Rev.0 to Rev. A
Changes to Ordering Guide .......................................................... 15
9/2011—Revision 0: Initial Version
Data Sheet ADM3051
Rev. A | Page 3 of 16
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 TA = 25°C, VCC = 5 V, unless otherwise noted.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
SUPPLY CURRENT ICC
Dominant State 78 mA VTxD = 1 V
Recessive State 10 mA VTxD = 4 V; RSLOPE = 47 kΩ
Standby State 275 μA VRS = VCC, ITxD = IRxD = IVREF = 0 mA, TA < 90°C
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 VTxD = 4 V
CMOS Logic Input Current Low IIL ?100 ?600 μA VTxD = 1 V
Differential Outputs
Recessive Bus Voltage VCANH, VCANL 2.0 3.0 V VTxD = 4 V, RL = ∞, see Figure 23
Off-State Output Leakage Current ILO ?2 +2 mA ?2 V < (VCANL, VCANH) < 7 V
ILO ?10 +10 mA ?5 V < (VCANL, VCANH) < 36 V
CANH Output Voltage VCANH 3.0 4.5 V VTxD = 1 V, see Figure 23
CANL Output Voltage VCANL 0.5 2.0 V VTxD = 1 V, see Figure 23
Differential Output Voltage VOD 1.5 3.0 V VTxD = 1 V, see Figure 23
VOD 1.5 V VTxD = 1 V, RL = 45 Ω, see Figure 23
OD ?500 +50 mV VTxD = 4 V, RL = ∞, see Figure 23
Short-Circuit Current, CANH ISCCANH ?200 mA VCANH = ?5 V
ISCCANH ?100 mA VCANH = ?36 V
Short-Circuit Current, CANL ISCCANL 200 mA VCANL = 36 V
RECEIVER
Differential Inputs
Voltage Recessive VIDR ?1.0 +0.5 V ?2 V < VCANL, VCANH <7 V, see Figure 25,
VCC = 4.75 V to 5.25 V, CL = 30 pF
?1.0 +0.4 ?7 V < VCANL, VCANH <12 V, see Figure 25,
CL = 30 pF
Voltage Dominant VIDD 0.9 5.0 V ?2 V < VCANL, VCANH <7 V, see Figure 25,
VCC = 4.75 V to 5.25 V, CL = 30 pF
1.0 5.0 ?7 V < VCANL, VCANH <12 V, see Figure 25,
CL = 30 pF
1
Input Voltage Hysteresis VHYS 150 mV See Figure 26
CANH, CANL Input Resistance RIN 5 25 kΩ
Differential Input Resistance RDIFF 20 100 kΩ
Logic Outputs
Output Voltage High VOH 0.8 VCC VCC V IOUT = ?100 μA
Output Voltage Low VOL 0 0.2 VCC V IOUT = 1 mA
VOL 0 1.5 V IOUT = 10 mA
Short-Circuit Current |IOS| 120 mA VOUT = GND or VCC
VOLTAGE REFERENCE
Reference Output Voltage VREF 2.025 3.025 V VRS = 1 V, |IREF| = 50 μA
REF 0.4 VCC 0.6 VCC V VRS = 4 V, |IREF| = 5 μA
STANDBY/SLOPE CONTROL
Input Voltage for Standby Mode VSTB 0.75 VCC V
Current for Slope Control Mode ISLOPE ?10 ?200 μA
Slope Control Mode Voltage VSLOPE 0.4 VCC 0.6 VCC V
1
In standby, VCC = 4.75 V to 5.25 V.
ADM3051 Data Sheet
Rev. A | Page 4 of 16
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/Comments
DRIVER
Maximum Data Rate 1 Mbps VRS = 1 V
Propagation Delay from TxD On to Bus
Active
tonTxD 50 ns VRS = 1 V, RL = 60 Ω, CL = 100 pF, see Figure 24,
Figure 27
Propagation Delay from TxD Off to Bus
Inactive
toffTxD 40 80 ns VRS = 1 V, RL = 60 Ω, CL = 100 pF, see Figure 24,
Figure 27
RECEIVER
Propagation Delay from TxD On to
Receiver Active
tonRxD 55 120 ns VRS = 1 V, RL = 60Ω, CL = 100 pF, see Figure 24,
Figure 27
440 600 ns RSLOPE = 47 kΩ, RL = 60 Ω, CL = 100 pF, see Figure 24,
Figure 27
Propagation Delay from TxD Off to
Receiver Inactive
toffRxD 90 190 ns RSLOPE = 0 Ω, RL = 60 Ω, CL = 100 pF, see Figure 24,
Figure 27
290 400 ns RSLOPE = 47 kΩ, RL = 60 Ω, CL = 100 pF, see Figure 24,
Figure 27
Bus Dominant to RxD Low tdRxDL 3 μs VRS = 4 V, VTxD = 4 V, RL = 60 Ω, CL = 100 pF, see
Figure 24, Figure 29
CANH, CANL Slew Rate |SR| 7 V/μs RSLOPE = 47 kΩ, RL = 60 Ω, CL = 100 pF, see Figure 24,
Figure 27
TIME TO WAKE-UP FROM STANDBY tWAKE 20 μs VTxD = 1 V, see Figure 28
Data Sheet ADM3051
Rev. A | Page 5 of 16
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
VREF ?0.3 V to VCC + 0.3 V
RS ?0.3 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 at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
ADM3051 Data Sheet
Rev. A | Page 6 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
TxD 1
GND 2
V
CC
3
RxD 4
RS8
CANH7
CANL6
V
REF
5
ADM3051
TOP VIEW
(Not to Scale)
100
29
-
0
09
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 TxD Driver Input Data.
2 GND Ground.
3 VCC Power Supply. This pin requires a decoupling capacitor to GND of 100 nF.
4 RxD Receiver Output Data.
5 VREF Reference Voltage Output.
6 CANL Low Level CAN Voltage Input/Output.
7 CANH High Level CAN Voltage Input/Output.
8 RS Slope Resistor Input.
Data Sheet ADM3051
Rev. A | Page 7 of 16
TYPICAL PERFORMANCE CHARACTERISTICS
90
83
–50 125
P
RO
P
AG
AT
I
O
N
DE
L
AY
T
x
D O
N T
O
RE
CE
I
V
E
R ACT
I
V
E
,
t
onRx
D
(n
s
)
TEMPERATURE (°C) 10
02
9-
01
0
84
85
86
87
88
89
–25 0 25 50 75 100
Figure 3. Propagation Delay from TxD On to Receiver Active vs. Temperature
92
80
4.5 5.5
P
RO
P
AG
AT
I
O
N
DE
L
AY
T
x
D O
N T
O
RE
CE
I
V
E
R ACT
I
V
E
,
t
onRx
D
(n
s
)
SUPPLY VOLTAGE (V) 10
02
9-
01
1
84
82
86
88
90
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
Figure 4. Propagation Delay from TxD On to Receiver Active vs. Supply
Voltage
500
150
–50 125
P
RO
P
AG
AT
I
O
N DE
L
AY
T
x
D O
N
T
O
RE
CE
I
V
E
R AC
T
I
V
E
(
S
L
O
P
E
M
O
DE
)
,
t
onRx
D
(n
s
)
TEMPERATURE (°C)
10
02
9-
0
12
200
250
300
350
400
450
–25 0 25 50 75 100
Figure 5. Propagation Delay (Slope Control Mode, RSLOPE = 47 kΩ) from TxD
On to Receiver Active vs. Temperature
560
400
420
440
460
4.5 5.5
P
RO
P
AG
AT
I
O
N
D
E
L
A
Y
T
x
D
O
N
T
O
R
EC
EI
VER
A
C
T
I
VE (SL
O
PE MO
D
E),
t
onRx
D
(n
s
)
SUPPLY VOLTAGE (V) 10
0
2
9-
0
1
3
500
480
520
540
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
Figure 6. Propagation Delay (Slope Control Mode, RSLOPE = 47 kΩ) from TxD
On to Receiver Active vs. Supply Voltage
180
0
–50 125
P
R
OP
A
G
A
TION
D
E
LA
Y
Tx
D
OFF TO
RE
C
E
I
V
E
R
I
N
AC
T
I
V
E
,
t
o
ffR
x
D
(n
s)
TEMPERATURE (°C) 1
0029
-
014
60
40
20
80
100
120
140
160
–25 0 25 50 75 100
Figure 7. Propagation Delay from TxD Off to Receiver Inactive vs.
Temperature
160
100
110
4.5 5.5
P
R
OP
A
G
A
TION
D
E
LA
Y
Tx
D
OFF TO
RE
C
E
I
V
E
R
I
N
AC
T
I
V
E
,
t
o
ffR
x
D
(n
s)
SUPPLY VOLTAGE (V) 1
0029
-
015
120
150
140
130
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
Figure 8. Propagation Delay from TxD Off to Receiver Inactive vs. Supply
Voltage
ADM3051 Data Sheet
Rev. A | Page 8 of 16
350
0
50
150
100
–50 125
P
RO
P
AG
AT
I
O
N
DE
L
AY
T
x
D O
F
F
T
O
RE
CE
I
V
E
R I
N
ACT
I
V
E
(
S
L
O
P
E
M
O
DE
)
,
t
o
ffR
x
D
(n
s
)
TEMPERATURE (°C)
10
02
9-
01
6
200
250
300
–25 0 25 50 75 100
Figure 9. Propagation Delay (Slope Control Mode, RSLOPE = 47 kΩ) from TxD
Off to Receiver Inactive vs. Temperature
315
270
4.5 5.5
P
R
O
P
AG
AT
I
O
N
DE
L
A
Y
T
x
D O
F
F
T
O
RE
CE
I
V
E
R
I
NAC
T
I
V
E
(
S
L
O
P
E
M
O
D
E
)
,
t
of
f
R
x
D
(n
s
)
SUPPLY VOLTAGE (V) 10
0
2
9-
0
1
7
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
275
280
285
290
295
300
305
310
Figure 10. Propagation Delay (Slope Control Mode, RSLOPE = 47 kΩ) from TxD
Off to Receiver Inactive vs. Supply Voltage
184
166
–50 125
R
EC
EI
VER
I
N
PU
T
H
YST
ER
ESI
S (mV)
TEMPERATURE (°C) 1
0029
-
018
–25 0 25 50 75 100
168
170
172
174
176
178
180
182
Figure 11. Receiver Input Hysteresis vs. Temperature
35
0
5
15
10
–50 125
P
RO
P
AG
AT
I
O
N DE
L
AY
F
RO
M
T
x
D
O
F
F
T
O
BUS
I
NACT
I
V
E
,
t
o
ffT
x
D
(n
s
)
TEMPERATURE (°C)
10
02
9-
01
9
20
25
30
–25 0 25 50 75 100
Figure 12. Propagation Delay from TxD Off to Bus Inactive vs. Temperature
29.0
24.5
4.5 5.5
P
R
OP
A
G
A
TION
D
E
LA
Y
FR
O
M
Tx
D
OFF TO
B
U
S I
N
A
C
T
I
VE,
t
of
f
Tx
D
(n
s
)
SUPPLY VOLTAGE (V) 1
0029-
0
20
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
25.0
25.5
26.0
26.5
27.0
27.5
28.0
28.5
Figure 13. Propagation Delay from TxD Off to Bus Inactive vs. Supply Voltage
41
33
–50 125
P
RO
P
AG
AT
I
O
N DE
L
AY
F
RO
M
T
x
D
O
N
T
O
BU
S
ACT
I
V
E
,
t
onTx
D
(ns
)
TEMPERATURE (°C) 10
02
9-
02
1
–25 0 25 50 75 100
34
35
36
37
38
39
40
Figure 14. Propagation Delay from TxD On to Bus Active vs. Temperature
Data Sheet ADM3051
Rev. A | Page 9 of 16
45
0
4.5 5.5
P
R
O
P
AG
AT
I
O
N
DE
L
A
Y
F
R
O
M
T
x
D O
N
T
O
BU
S
AC
T
I
V
E
,
t
on
Tx
D
(n
s
)
SUPPLY VOLTAGE (V) 1
0029
-
022
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
5
10
15
20
25
30
35
40
Figure 15. Propagation Delay from TxD On to Bus Active vs. Supply Voltage
42
30
125 1000
S
UP
P
L
Y
CURRE
NT
,
I
CC
(m
A
)
DATA RATE (kbps) 10
02
9-
02
3
32
34
36
38
40
250 375 500 625 750 875
Figure 16. Supply Current (ICC) vs. Data Rate
2.410
2.355
DRI
V
E
R DI
F
F
E
RE
NT
I
A
L
O
UT
P
UT
V
O
L
T
AG
E
DO
M
I
NANT
,
V
OD
(V
)
TEMPERATURE (°C) 10
029
-
02
4
2.360
2.365
2.370
2.375
2.380
2.385
2.390
2.395
2.400
2.405
–50 125–25 0 25 50 75 100
Figure 17. Driver Differential Output Voltage Dominant vs. Temperature
3.0
0
4.5 5.5
D
R
I
VER
D
I
F
F
ER
E
N
T
I
A
L
O
U
T
PU
T
VO
L
T
A
G
E
DO
M
I
N
ANT
,
V
OD
(V
)
SUPPLY VOLTAGE (V) 10
02
9-
02
5
1.0
0.5
1.5
2.0
2.5
4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4
Figure 18. Driver Differential Output Voltage Dominant vs. Supply Voltage
4.9915
4.9875
–50 125
R
E
C
E
IV
E
R
O
U
TP
U
T
H
I
GH
V
O
LTA
G
E
,
V
OH
(V)
TEMPERATURE (°C) 100
29-
02
6
–25 0 25 50 75 100
4.9880
4.9885
4.9890
4.9895
4.9900
4.9905
4.9910
I
OUT
= –100μA
Figure 19. Receiver Output High Voltage vs. Temperature
0.45
0
–50 125
RE
CE
I
V
E
R O
UT
P
UT
L
O
W
V
O
L
T
AG
E
(I
OU
T
= 10
m
A
)
,
V
OL
(V
)
TEMPERATURE (°C) 10
02
9-
0
27
–25 0 25 50 75 100
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
I
OUT
= 10mA
I
OUT
= 1mA
Figure 20. Receiver Output Low Voltage vs. Temperature
ADM3051 Data Sheet
Rev. A | Page 10 of 16
2.80
2.40
–50 125
R
E
FE
R
E
N
C
E
V
O
LTA
GE
,
V
REF
(V
)
TEMPERATURE (°C) 1
0029-
0
30
–25 0 25 50 75 100
2.45
2.50
2.55
2.60
2.65
2.70
2.75
I
REF
= +50μA
I
REF
= –50μA
I
REF
= +5μA
I
REF
= –5μA
Figure 21. VREF vs. Temperature
50
45
40
35
30
25
20
15
10
5
0
0 1020304050607080
SL
EW
R
A
T
E
(V/
μ
s
)
RESISTANCE, R
S
(k?)
1
002
9-
1
01
Figure 22. Driver Slew Rate vs. Resistance, RSLOPE
Data Sheet ADM3051
Rev. A | Page 11 of 16
TEST CIRCUITS AND SWITCHING CHARACTERISTICS
TxD V
OD
V
CANH
V
CANL
V
OC
R
L
R
L
2
2
1002
9-
002
CANH
CANL
Figure 23. Driver Voltage Measurements
CANH
CANL
TxD
RxD
C
L
R
L
30pF
1002
9-
003
Figure 24. Switching Characteristics Measurements
C
L
RxD
CANH
CANL
V
ID
100
29-
006
Figure 25. Receiver Voltage Measurements
0.5 0.9
V
RxD
HIGH
LOW
V
HYS
V
ID
(V)
10
029-
0
04
Figure 26. Receiver Input Hysteresis
0.3V
CC
0.9V
V
OR
V
OD
0V
0V
V
CC
0.5V
0.3V
CC
V
DIFF
RxD
V
CC
TxD
0.7V
CC
0.7V
CC
V
DIFF
= V
CANH
– V
CANL
t
onTxD
t
offTxD
t
onRxD
t
offRxD
10
029
-
007
Figure 27. Driver and Receiver Propagation Delay
10
02
9-
0
08
NOTES:
1. TxD = 0V
V
CC
V
CC
RS
RxD
0V
0V
t
WAKE
Figure 28. Wake-Up Delay Returning from Standby Mode
ADM3051 Data Sheet
Rev. A | Page 12 of 16
V
DIFF
RxD
V
DIFF
= V
CANH
– V
CANL
t
dRxDL
0V
1.5V
0V
V
CC
10
029-
005NOTES:
1. RS = 4V (STANDBY MODE)
2. TxD = 4V
Figure 29. Bus Dominant to RxD Low (Standby Mode)
Data Sheet ADM3051
Rev. A | Page 13 of 16
CIRCUIT DESCRIPTION
CAN TRANSCEIVER OPERATION
A CAN bus has two states: dominant and recessive. A dominant
state is present on the bus when the differential voltage between
CANH and CANL is greater than 0.9 V. A recessive state is
present on the bus when the differential voltage between CANH
and CANL is less than 0.5 V. During a dominant bus state, the
CANH pin is high and the CANL pin is low. During a recessive
bus state, both the CANH and CANL pins are in the high
impedance state.
The driver drives CANH high and CANL low (dominant state)
if a logic low is present on TxD. If a logic high is present on
TxD, the driver output is placed in a high impedance state
(recessive state). The driver output states are shown in Table 7.
The receiver output is low if the bus is in the dominant state and
high if the bus is in the recessive state. If the differential voltage
between CANH and CANL is between 0.5 V and 0.9 V, the bus
state is indeterminate and the receiver output may be high or
low. The receiver output states for given inputs are listed in
Table 8.
OPERATIONAL MODES
Three modes of operation are available: high speed, slope
control, and standby. RS (Pin 8) allows modification of the
operational mode by connecting the RS input through a resistor
to ground, or directly to ground, or to a CAN controller, as
shown in Figure 30.
With RS connected to ground, the output transistors switch on
and off at the maximum rate possible in high speed mode, with
no modification to the rise and fall slopes. EMI in this mode
can be alleviated using shielded cables.
Alternatively, connecting RS to a resistor, RSLOPE, allows
slope control mode, with the value of the resistor modifying
the rise and fall slopes. The reduced EMI allows the use of
unshielded cables.
Applying a logic high to RS initiates a low current standby mode.
The transmitter is disabled, and the receiver is connected to a
low current. RxD goes low upon receiving dominant bits, allowing
an attached microcontroller that detects this to wake the
transceiver via Pin 8, which returns it to standard operation.
The receiver is slower in standby mode and loses the first
message at higher bit rates.
Table 5. Mode Selection Using RS Pin (Pin 8)
Mode Condition to Force
Resulting
Voltage/Current
Standby VRS > 0.75 VCC ?IRS < 10 μA
Slope Control 10 μA < ?IRS < 200 μA 0.4 VCC < VRS < 0.6 VCC
High Speed VRS < 0.3 VCC ?IRS < ?500 μA
TRUTH TABLES
The truth tables in this section use the abbreviations found in
Table 6.
Table 6. Truth Table Abbreviations
Letter Description
H High level
L Low level
X Don’t care
I Indeterminate
Z High impedance (off)
NC Disconnected
Table 7. Transmitting
Supply Input Outputs
VCC TxD State CANH CANL
On L Dominant H L
On H Recessive Z Z
On Z Recessive Z Z
Off X Z Z Z
Table 8. Receiving
Supply Inputs Output
VCC VID = CANH ? CANL Bus State RxD
On ≥0.9 V Dominant L
On ≤0.5 V Recessive H
On 0.5 V < VID < 0.9 V I I
On Inputs open Recessive H
Off X X I
THERMAL SHUTDOWN
The ADM3051 contains thermal shutdown circuitry that
protects the part from excessive power dissipation during fault
conditions. Shorting the driver outputs to a low impedance
source can result in high driver currents. The thermal sensing
circuitry detects the increase in die temperature under this
condition and disables the driver outputs. The design of this
circuitry ensures the disabling of driver outputs upon reaching
a die temperature of 150°C. As the device cools, reenabling of
the drivers occurs at a temperature of 140°C.
ADM3051 Data Sheet
Rev. A | Page 14 of 16
APPLICATIONS INFORMATION
ADM3051
TxD
RS
RxD
V
REF
V
CC
R
T
/2 R
T
/2
R
T
/2 R
T
/2
MODE
THERMAL
SHUTDOWN
CAN
CONTROLLER
VOLTAGE
REFERENCE
D
R
CANH
CANL
GND
100nF
100nF
+5V SUPPLY
+5V SUPPLY
R
SLOPE
C
T
C
T
1002
9-
0
28
NOTES
1. R
T
IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE USED.
BUS
CONNECTOR
Figure 30. Typical CAN Node Using the ADM3051
ADM3051
TxD RxD
D
R
CANH CANL
10
029-
029
NOTES
1. MAXIMUM NUMBER OF NODES: 110.
2. R
T
IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE USED.
ADM3051
TxD RxD
D
R
CANH CANL
ADM3051
TxD RxD
D
R
CANH CANL
R
T
/2
R
T
/2
R
T
/2
R
T
/2
C
L
C
L
Figure 31. Typical CAN Network
Data Sheet ADM3051
Rev. A | Page 15 of 16
OUTLINE DIMENSIONS
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
COMPLIANT TO JEDEC STANDARDS MS-012-AA
01
2407-
A
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
1.75 (0.0688)
1.35 (0.0532)
SEATING
PLANE
0.25 (0.0098)
0.10 (0.0040)
4
1
85
5.00 (0.1968)
4.80 (0.1890)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.0500)
BSC
6.20 (0.2441)
5.80 (0.2284)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
Figure 32. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model
1
Temperature Range Package Description Package Option
ADM3051CRZ ?40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8
ADM3051CRZ-REEL7 ?40°C to +125°C 8-Lead Standard Small Outline Package [SOIC_N] R-8
EVAL-ADM3051EBZ Evaluation Board
1
Z = RoHS Compliant Part.
ADM3051 Data Sheet
Rev. A | Page 16 of 16
NOTES
?2011–2016 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10029-0-5/16(A)
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