FEATURES
n
n
n
n
n
LTC2875
±60V Fault Protected
3.3V or 5V 25kV ESD
High Speed CAN FD Transceiver
DESCRIPTION
The
LTC
®
2875
is a robust high speed, low power CAN
transceiver operating on 3.3V or 5V supplies that features
±60V overvoltage fault protection on the data transmis-
sion lines during all modes of operation, including power-
down. The maximum data rate has been extended to
4Mbps to support high speed protocols based on the CAN
physical layer. Supports up to 4Mbps CAN with Flexible
Data Rate (CAN FD). Enhanced ESD protection allows
these parts to withstand ±25kV HBM on the transceiver
interface pins without latchup or damage.
Extended ±36V input common mode range and high
common mode rejection on the CAN receiver provides
tolerance of large ground loop voltages. A sophisticated
CAN driver with active symmetry control maintains tight
control of the common mode voltage for excellent elec-
tromagnetic emission, while the variable slew rate and
split termination support allow additional EME reduction.
All registered trademarks and trademarks are the property of their respective owners.
n
n
n
n
n
n
n
n
n
n
Protected from Overvoltage Line Faults to ±60V
3.3V or 5V Supply Voltage
High Speed CAN FD Operation Up to 4Mbps
±25kV ESD Interface Pins, ±8kV All Other Pins
Variable Slew Rate Driver with Active Symmetry
Control and SPLIT Pin for Low Electromagnetic
Emission (EME)
Extended Common Mode Range (±36V)
Ideal Passive Behavior to CAN Bus with Supply Off
Current Limited Drivers and Thermal Shutdown
Power-Up/Down Glitch-Free Driver Outputs
Micropower Shutdown Mode
Transmit Data (TXD) Dominant Timeout Function
ISO 11898-2 and CAN FD Compliant
DeviceNet Compatible
Up to MP-Grade Available (–55°C to 125°C)
3mm × 3mm 8-Lead DFN and SO-8 Packages
APPLICATIONS
n
n
n
n
Industrial Control and Instrumentation Networks
Automotive and Transportation Electronics
Building Automation, Security Systems, HVAC
Medical Equipment
TYPICAL APPLICATION
CAN Bus Link with Large Ground Loop Voltage
LTC2875
V
CC1
RXD1
R
CANH
120
TXD1
RS1
V
CC2
CANH
120
R
LTC2875
TXD
2V/DIV
LTC2875 Transmitting at 4Mbps
from a 3.3V Supply
RXD2
RXD
2V/DIV
COMMON MODE
D
CANL
GND1 AC GROUND
LOOP ≤ 36V
PEAK
CANL
GND2
D
TXD2
RS2
2875 TA01a
CANH
1V/DIV
CANL
1V/DIV
100ns/DIV
2875 TA01b
Rev A
Document Feedback
For more information
www.analog.com
1
LTC2875
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltages
V
CC
........................................................... –0.3V to 6V
Logic Input Voltages (TXD, RS) .................. –0.3V to 6V
Interface I/O: CANH, CANL, SPLIT ............. –60V to 60V
Receiver Output (RXD) .................–0.3V to (V
CC
+ 0.3V)
Bus Differential Voltage (CANH-CANL) ...... –120V to 120V
Operating Ambient Temperature Range (Note 4)
LTC2875I .............................................–40°C to 85°C
LTC2875H .......................................... –40°C to 125°C
LTC2875MP ....................................... –55°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
TXD 1
GND 2
V
CC
3
RXD 4
8
7
6
5
RS
CANH
CANL
SPLIT
TXD
GND
V
CC
RXD
1
2
3
4
9
8 RS
7 CANH
6 CANL
5 SPLIT
S8 PACKAGE
8-LEAD (150mil) PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 120°C/W,
θ
JC
= 39°C/W
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 43°C/W,
θ
JC
= 5.5°C/W
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
ORDER INFORMATION
LEAD FREE FINISH
LTC2875IDD#PBF
LTC2875HDD#PBF
LTC2875MPDD#PBF
LTC2875IS8#PBF
LTC2875HS8#PBF
LTC2875MPS8#PBF
TAPE AND REEL
LTC2875IDD#TRPBF
LTC2875HDD#TRPBF
LTC2875MPDD#TRPBF
LTC2875IS8#TRPBF
LTC2875HS8#TRPBF
LTC2875MPS8#TRPBF
PART MARKING
LGKG
LGKG
LGKG
2875
2875
2875
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (150 mil) Plastic SO
8-Lead (150 mil) Plastic SO
8-Lead (150 mil) Plastic SO
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
Contact the factory for parts specified with wider operating temperature ranges.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
Rev A
2
For more information
www.analog.com
LTC2875
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V or 5V, Figure 1 applies with R
L
= 60Ω, RS = 0V, TYP values
at V
CC
= 5V unless otherwise noted. (Note 2)
SYMBOL
Supplies
V
CC
I
CC(R)
I
CC(D)
I
CCS
Supply Voltage
Supply Current (Recessive)
Supply Current (Dominant)
Supply Current in Shutdown Mode (I-Grade)
Supply Current in Shutdown Mode
(H-, MP-Grade)
Driver
V
O(D)
Bus Output Voltage
(Dominant)
CANH
CANL
V
O(R)
V
OD(D)
V
OD(R)
V
OC(D)
I
OS(D)
Bus Output Voltage (Recessive)
Differential Output Voltage (Dominant)
Differential Output Voltage (Recessive)
Common Mode Output Voltage (Dominant)
Bus Output Short-Circuit Current
(Dominant)
CANH
CANH
CANL
CANL
Receiver
V
CM
V
TH+
V
TH–
∆V
TH
R
IN
R
ID
∆R
IN
C
IH
C
IL
C
ID
I
L
Bus Common Mode Voltage = (CANH + CANL)/2
for Data Reception
Bus Input Differential Threshold Voltage
(Positive-Going)
Bus Input Differential Threshold Voltage
(Negative-Going)
Bus Input Differential Hysteresis Voltage
Input Resistance (CANH and CANL)
Differential Input Resistance
Input Resistance Matching
Input Capacitance to GND (CANH)
Input Capacitance to GND (CANL)
Differential Input Capacitance
Bus Leakage Current (Power Off) (I-Grade)
Bus Leakage Current (Power Off) (H-, MP-Grade)
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V, –36V ≤ V
CM
≤ 36V
V
CC
= 3.3V, –25V ≤ V
CM
≤ 25V
V
CC
= 5V, –36V ≤ V
CM
≤ 36V
V
CC
= 3.3V, –25V ≤ V
CM
≤ 25V
V
CC
= 5V, –36V ≤ V
CM
≤ 36V
V
CC
= 3.3V, –25V ≤ V
CM
≤ 25V
TXD = V
CC
; R
IN
= ∆V/∆I; ∆I = ±20µA
TXD = V
CC
; R
IN
= ∆V/∆I; ∆I = ±20µA
R
IN
(CANH) to R
IN
(CANL)
(Note 6)
(Note 6)
(Note 6)
V
CC
= 0V, CANH = CANL = 5V, T ≤ 85°C
l
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
3.3V V
CC
Range
5V V
CC
Range
l
l
l
l
MIN
3
4.5
1
25
TYP
3.3
5
1.8
42
1
1
MAX
3.6
5.5
3
60
5
15
UNITS
V
V
mA
mA
µA
µA
RS = TXD = V
CC
, RXD Open, T ≤ 85°C
RS = TXD = V
CC
, RXD Open,
T ≤ 125°C
t < t
TOTXD
t < t
TOTXD
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V, No Load (Figure 1)
V
CC
= 3.3V, No Load (Figure 1)
R
L
= 50Ω to 65Ω (Figure 1)
No Load (Figure 1)
V
CC
= 5V, (Figure 1)
V
CC
= 3.3V, (Figure 1)
CANH = 0V
–60V ≤ CANH ≤ 60V
CANL = 5V
–60V ≤ CANL ≤ 60V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
2.75
2.15
0.5
0.5
2
1.45
1.5
–500
2
1.45
–100
–100
40
–3
3.6
2.9
1.4
0.9
2.5
1.95
2.2
0
2.5
1.95
–75
75
4.5
3.3
2.25
1.65
3
2.45
3.0
50
3
2.45
–40
3
100
100
±36
±25
V
V
V
V
V
V
V
mV
V
V
mA
mA
mA
mA
V
V
mV
mV
mV
mV
mV
mV
775
775
500
500
625
625
150
150
25
50
40
80
32
8
8.4
900
900
50
100
±1
kΩ
kΩ
%
pF
pF
pF
±10
±40
µA
µA
V
CC
= 0V, CANH = CANL = 5V, T ≤ 125°C
l
Rev A
For more information
www.analog.com
3
LTC2875
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V or 5V, Figure 1 applies with R
L
= 60Ω, RS = 0V, TYP values
at V
CC
= 5V unless otherwise noted. (Note 2)
SYMBOL
V
O_SPLIT
I
OS_SPLIT
V
OH_RXD
V
OL_RXD
I
OS_RXD
V
IH_TXD
V
IL_TXD
I
IN_TXD
V
IH_RS
V
IL_RS
I
IN_RS
PARAMETER
SPLIT Output Voltage
SPLIT Short-Circuit Current
Receiver Output High Voltage
Receiver Output Low Voltage
Receiver Short-Circuit Current
High Level Input Voltage
Low Level Input Voltage
Logic Input Current
High Level Input Voltage
Low Level Input Voltage
Logic Input Current
CONDITIONS
–500μA ≤ I(SPLIT) ≤ V
CC
= 5V
500μA
V
CC
= 3.3V
–60V ≤ SPLIT ≤ 60V
I(RXD) = –3mA (Sourcing)
I(RXD) = 3mA (Sinking)
RXD = 0V or V
CC
V
CC
= 3.3V or 5V
V
CC
= 3.3V or 5V
0 ≤ TXD ≤ V
CC
V
CC
= 3.3V or 5V
V
CC
= 3.3V or 5V
0 ≤ RS ≤ V
CC
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
1.5
0.9
–3
V
CC
– 0.4V
TYP
2.5
1.9
MAX
3.5
2.9
3
UNITS
V
V
mA
V
Common Mode Stabilization Output SPLIT
Receiver Output RXD
l
l
l
0.4
±11
0.67 • V
CC
0.33 • V
CC
–20
0.9 • V
CC
0.5 • V
CC
–170
0
10
0
10
±18
V
mA
V
V
µA
V
V
µA
Logic Input TXD
l
l
l
Logic / Slew Control Input RS
l
l
l
Rev A
4
For more information
www.analog.com
LTC2875
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V or 5V, Figure 1 applies with R
L
= 60Ω, C
L
= 100pF, RSL =
0Ω, RS = 0V, TYP values at V
CC
= 5V unless otherwise noted. (Note 2)
SYMBOL
f
MAX
t
PTXBD
t
PTXBR
t
PTXBDS
t
PTXBRS
t
PBDRX
t
PBRRX
t
PTXRXD
t
PTXRXR
t
PTXRXDS
t
PTXRXRS
t
TOTXD
t
BIT(RXD),2M
t
BIT(RXD),4M
t
ENRX
t
ENTX
t
SHDNRX
t
SHDNTX
V
SYM
PARAMETER
Maximum Data Rate
TXD to Bus Dominant Propagation Delay
TXD to Bus Recessive Propagation Delay
TXD to Bus Dominant Propagation Delay,
Slow Slew
TXD to Bus Recessive Propagation Delay,
Slow Slew
Bus Dominant to RXD Propagation Delay
Bus Recessive to RXD Propagation Delay
TXD to RXD Dominant Propagation Delay
TXD to RXD Recessive Propagation Delay
TXD to RXD Dominant Propagation Delay,
Slow Slew
TXD to RXD Recessive Propagation Delay,
Slow Slew
TXD Timeout Time
Receiver Output Recessive Bit Time, 2Mbps,
Loop Delay Symmetry
Receiver Output Recessive Bit Time, 4Mbps
RXD Enable from Shutdown
TXD Enable from Shutdown
Time to Shutdown, RXD
Time to Shutdown, TXD
Driver Symmetry (CANH + CANL – 2V
O(R)
)
(Dynamic Peak Measurement)
(Figure 2, 3)
(Figure 2, 3)
RSL=200kΩ
(Figure 2, 3)
RSL=200kΩ
(Figure 2, 3)
(Figure 2, 3)
(Figure 2, 3)
(Figure 2, 3)
(Figure 2, 3)
RSL = 200kΩ
(Figure 2, 3)
RSL = 200kΩ
(Figure 2, 3)
(Figure 2, 4)
(Figure 7)
(Figure 7)
(Figure 5)
(Figure 2, 6) (Note 5)
(Figure 5)
(Figure 2, 6)
RL = 60Ω/Tol. < 1%, C
SPLIT
=
4.7nF/5%, fTXD = 250kHz, Input
Impedance of Oscilloscope: ≤ 20pF/ ≥
1MΩ (Figure 2)
V
CC2
= 3.3V
V
CC2
= 5V
V
CC2
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
CONDITIONS
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
SWITCHING CHARACTERISTICS
MIN
4
45
45
80
60
200
220
400
480
25
25
80
75
115
95
190
210
420
480
0.5
400
400
200
TYP
MAX
UNITS
Mbps
Transceiver Timing
80
75
120
90
540
560
960
1040
40
45
120
115
165
135
500
530
940
1020
2
455
475
225
130
115
170
120
1220
1200
2010
2240
65
80
180
165
215
185
1110
1090
1910
2110
4
550
550
275
40
40
250
250
±500
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
µs
µs
ns
ns
mV
Transmitter Drive Symmetry (Common Mode Voltage Fluctuation)
l
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 3:
Not tested in production.
Note 4:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature exceeds 150°C when overtemperature protection is active.
Continuous operation above the specified maximum operating temperature
may result in device degradation or failure.
Note 5:
TXD must make a high to low transition after this time to assert a
bus dominant state.
Note 6:
Pin capacitance given for reference only and is not tested in
production.
Rev A
For more information
www.analog.com
5
京公网安备 11010802033920号
EEWORLD
