ATMEL ATA6660_08

Features
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Usable for Automotive 12V/24V and Industrial Applications
Maximum High-speed Data Transmissions up to 1 MBaud
Fully Compatible with ISO 11898
Controlled Slew Rate
Standby Mode
TXD Input Compatible to 3.3V
Short-circuit Protection
Overtemperature Protection
High Voltage Bus Lines Protection, –40V to +40V
High Speed Differential Receiver Stage with a Wide Common Mode Range,
–10V to +10V, for High Electromagnetic Immunity (EMI)
• Fully Controlled Bus Lines, CANH and CANL to Minimize
Electromagnetic Emissions (EME)
• High ESD Protection at CANH, CANL HBM 8 kV, MM 300V
High-speed Can
Transceiver
ATA6660
1. Description
The ATA6660 is a monolithic circuit based on the Atmel®’s Smart Power BCD60-III
technology. It is especially designed for high speed CAN-Controller (CAN-C) differential mode data transmission between CAN-Controllers and the physical differential bus
lines.
Figure 1-1.
Block Diagram
3 VCC
1 TXD
TXD Input Stage
Overtemperature
and Short Circuit
Protection
Driver
7 CANH
8 RS
Constant Slope/
Standby
4 RXD
Receiver
6 CANL
5 VREF
Reference
Voltage
0.5*VCC
2 GND
4582E–AUTO–02/08
2. Pin Configuration
Figure 2-1.
Pinning SO8
TXD
GND
VCC
RXD
Table 2-1.
2
1
2
3
4
8
7
6
5
RS
CANH
CANL
VREF
Pin Description
Pin
Symbol
Function
1
TXD
Transmit data input
2
GND
Ground
3
VCC
Supply voltage
4
RXD
Receive data output
5
VREF
Reference voltage output
6
CANL
Low level CAN voltage input/output
7
CANH
High level CAN voltage input/output
8
RS
Switch Standby Mode/Normal Mode
ATA6660
4582E–AUTO–02/08
ATA6660
3. Functional Description
The ATA6660 is a monolithic circuit based on Atmel’s Smart Power BCD60-III technology. It is
especially designed for high-speed differential mode data transmission in harsh environments
like automotive and industrial applications. Baudrate can be adjusted up to 1 Mbaud. The
ATA6660 is fully compatible to the ISO11898, the developed standard for high speed CAN-C
(Controller Area Network) communication.
3.1
Voltage Protection and ESD
High voltage protection circuitry on both line pins, CANH (pin 7) and CANL (pin 6), allow bus line
voltages in the range of –40V to +40V. ESD protection circuitry on line pins allow HBM = 8 kV,
MM = 300V. The implemented high voltage protection on bus line output/input pins (7/6) makes
the ATA6660 suitable for 12V automotive applications as well as 24V automotive applications.
3.2
Slope Control
A fixed slope is adjusted to prevent unsymmetrical transients on bus lines causing EMC problems. Controlled bus lines, both CANH and CANL signal, will reduce radio frequency
interference to a minimum. In well designed bus configurations the filter design costs can be
reduced dramatically.
3.3
Overcurrent Protection
In the case of a line shorts, like CANH to GND, CANL to VCC, integrated short current limitation
allows a maximum current of ICANH_SC or ICANL_SC. If junction temperature rises above 165°C an
internal overtemperature protection circuitry shuts down both output stages, the receiver will
stay activated.
3.4
Standby Mode
The ATA6660 can be switched to Standby Mode by forcing the voltage VRS > 0.87 × VCC. In
Standby Mode the supply current will reduce dramatically, supply current during Standby Mode
is typical 600 µA (IVCC_stby). Transmitting data function will not be supported, but the opportunity
will remain to receive data. A high-speed comparator is listening for activities on the bus. A dominant bus signal will force the output RXD to a low level in typical tdRXDL = 400 ns. If the RS pin is
not connected, causing through a broken connection to the controller, the ATA6660 will switch to
Standby Mode automatically.
3.5
High-speed Receiver
In Normal Mode a fast receiver circuitry combined with a resistor network is able to detect differential bus line voltages Vrec_th > 0.9V as dominant bit, differential bus line voltages Vrec_th < 0.5V
as recessive bit.
The wide receiver common mode range, –10V to +10V, combined with a symmetrical differential
receiver stage offers high immunity against electromagnetic interference. A typical hysteresis of
70 mV is implemented. Dominant differential bus voltages forces RXD output (pin 4) to low level,
recessive differential bus voltages to high level.
3
4582E–AUTO–02/08
3.6
TXD Input
The input stage pin 1 (TXD) is compatible for 3.3V output levels from new controller families.
Pull-up resistance (25 kΩ) forces the IC to Recessive Mode, if TXD-Pin is not connected. TXD
low signal drives the transmitter into dominant state.
3.7
Transmitter
A integrated complex compensation technique allows stable data transmission up to 1 MBaud.
Low level on TXD input forces bus line voltages CANH to 3.5V, CANL to 1.5V with a termination
resistor of 60Ω. In the case of a line short circuit, like CANH to GND, CANL to VCC, integrated
short current limitation circuitry allows a maximum current of 150 mA. If junction temperature
rises above typical 163°C an internal overtemperature protection shuts down both output stages,
the Receive Mode will stay activated.
3.8
Split Termination Concept
With a modified bus termination (see Figure 8-3 on page 10) a reduction of emission and a
higher immunity of the bus system can be achieved. The one 120Ω resistor at the bus line end
nodes is split into two resistors of equal value, i.e., two resistors of 60Ω. The resistors for the
stub nodes is recommended with two resistors of 1.3 kΩ. (for example 8 stub nodes and 2 bus
end nodes) Notice: The bus load of all the termination resistors has to stay within the range of
50Ω to 65Ω.
The common mode signal at the centre tap of the termination is connected to ground via a
capacitor of e.g., Csplit = 10 nF to 100 nF. A separate ground lead to the ground pin of the module connector is recommended.
4
ATA6660
4582E–AUTO–02/08
ATA6660
4. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Min.
Max.
Unit
VCC
–0.3
+6
V
VTXD, VREF, VRS,
VRXD
–0.3
VCC +0.3
V
–40.0
+40.0
V
–150
+100
V
–55
+150
°C
–40
+125
°C
Supply voltage
DC voltage at pins 1, 4, 5 and 8
Conditions
0V < VCC < 5.25V;
no time limit
VCANH, VCANL
DC voltage at pins 6 and 7
Transient voltage at pins 6 and 7
Storage temperature
TStg
Operating ambient temperature
Tamb
ESD classification
All pins
HBM ESD S.5.1
MM JEDEC A115A
ESD classification
Pin 6, 7 versus
pin 2
HBM 1.5 kΩ, 100 pF
MM 0Ω, 200 pF
±3000
±200
V
V
±8000
±300
V
V
5. Thermal Resistance
Parameters
Thermal resistance from junction to ambient
Symbol
Value
Unit
RthJA
160
K/W
6. Truth Table
VCC
TXD
RS
CANH
4.75V to 5.25V
0
< 0.3 × VCC
3.5V
0.5 × VCC
4.75V to 5.25V
1 (or floating)
< 0.3 × VCC
0.5 × VCC
4.75V to 5.25V
X
> 0.87 × VCC
0.5 × VCC
CANL
Bus State
RXD
1.5V
Dominant
0
0.5 × VCC
Recessive
1
Recessive
1
7. RS (Pin 8) Functionality
Slope Control
Mode
Voltage and Current Levels
VRS > 0.87 × VCC
Standby
IRS < | 10 µA |
VRS < 0.3 × VCC
Constant slope control
IRS ≤ 500 µA
5
4582E–AUTO–02/08
8. Electrical Characteristics
VCC = 4.75V to 5.25V; Tamb = –40°C to +125°C; RBus = 60Ω; unless otherwise specified.
All voltages referenced to ground (pin 2); positive input current.
No.
1
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Supply Current
1.1
Supply current
dominant
VTXD = 0V
VRS = 0V
3
Ivcc_dom
45
60
mA
A
1.2
Supply current
recessive
VTXD = 5V
VRS = 0V
3
Ivcc_rec
10
15
mA
A
1.3
Supply current standby VRS = 5V
3
Ivcc_stby
600
980
µA
A
2
Transmitter Data Input TXD
2.1
HIGH level input
voltage
VTXD = 5V
VRS = 0V
1
VTXDH
2
VCC + 0.3
V
A
2.2
LOW level input voltage
VTXD = 0V
VRS = 0V
1
VTXDL
–0.3
+1
V
A
2.3
HIGH level input current VTXD = VCC
1
IIH
–1
0
µA
A
2.4
LOW level input voltage VTXD = 0V
1
IIL
–500
-50
µA
A
4
VRXDH
0.8 × VCC
VCC
V
A
3
Receiver Data Output RXD
3.1
High level output
voltage
3.2
Low level output voltage IRXD = 1 mA
IRXD = –100 µA
3.3
Short current at RXD
VTXD = 5V
VRXD = 0V
3.4
Short current at RXD
VTXD = 0V
VRXD = 5V
4
4
VRXDL
0
0.2 × VCC
V
A
4
IRXDs1
–3
-1
mA
A
4
IRXDs2
2
6
mA
A
Reference Output Voltage VREF
4.1
Reference output
voltage Normal Mode
VRS = 0V;
–50 µA < I5 < 50 µA
5
Vref_no
0.45 VCC
0.55 VCC
V
A
4.2
Reference output
voltage Standby Mode
VRS = 5 V;
–5 µA < I5 < 5 µA
5
Vref_stby
0.4 × VCC
0.6 VCC
V
A
3.0
V
A
+5
mA
A
5
DC Bus Transmitter CANH; CANL
5.1
Recessive bus voltage
VTXD = VCC; no load
6, 7
VCANH;
VCANL
2.0
5.2
IO(CANH)(reces)
IO(CANL)(reces)
–40V < VCANH;
VCANL < 40V;
0V < VCC < 5.25V
6, 7
IO_reces
–5
5.3
CANH output voltage
dominant
VTXD = 0V
6, 7
VCANH
2.8
3.5
4.5
V
A
5.4
CANL output voltage
dominant
VTXD = 0V
6, 7
VCANL
0.5
1.5
2.0
V
A
2.5
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
6
ATA6660
4582E–AUTO–02/08
ATA6660
8. Electrical Characteristics (Continued)
VCC = 4.75V to 5.25V; Tamb = –40°C to +125°C; RBus = 60Ω; unless otherwise specified.
All voltages referenced to ground (pin 2); positive input current.
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
5.5
Differential bus output
voltage
(VCANH – VCANL)
VTXD = 0V;
RL = 45Ω to 60Ω;
VCC = 4.9V
6, 7
Vdiffdom
1.5
2
3.0
V
A
VTXD = VCC; no load
6, 7
Vdiffrec
–500
+50
mV
A
–100
mA
A
5.6
5.7
Short-circuit CANH
current
VCANH = –10V
TXD = 0V
6, 7
ICANH_SC
–35
5.8
Short-circuit CANL
current
VCANL = 18V
TXD = 0V
6, 7
ICANL_SC
50
-
150
mA
A
6
DC Bus Receiver CANH; CANL
6.1
Differential receiver
threshold voltage
Normal Mode
–10V < VCANH < +10V
–10V < VCANL < +10V
6, 7
Vrec_th
0.5
0.7
0.9
V
A
6.2
Differential receiver
threshold voltage
Standby Mode
VRS = VCC
6, 7
Vrec_th_stby
0.5
0.7
0.9
V
A
6.3
Differential input
hysteresis
6, 7
Vdiff(hys)
mV
A
6.4
CANH and CANL
common mode input
resistance
6, 7
Ri
5
15
25
kΩ
A
6.5
Differential input
resistance
6, 7
Rdiff
10
30
100
kΩ
A
6.6
Matching between
CANH and CANL
common mode input
resistance
6, 7
Ri_m
–3
+3
%
A
6.7
CANH, CANL input
capacitance
6, 7
Ci
20
pF
D
6.8
Differential input
capacitance
6, 7
Cdiff
10
pF
D
6.9
CANH, CANL input
leakage input current
6, 7
ILI(CANH);
ILI(CANL)
250
µA
A
7
Thermal Shut-down
VCC = 0V
VCANH = 3.5V
VCANL = 1.5V
70
7.1
Shut-down junction
temperature for
CANH/CANL
TJ(SD)
150
163
175
°C
B
7.2
Switch on junction
temperature for
CANH/CANL
TJ(SD)
140
154
165
°C
B
7.3
Temperature hysteresis
THys
K
B
10
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
7
4582E–AUTO–02/08
8. Electrical Characteristics (Continued)
VCC = 4.75V to 5.25V; Tamb = –40°C to +125°C; RBus = 60Ω; unless otherwise specified.
All voltages referenced to ground (pin 2); positive input current.
No.
8
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Timing Characteristics Normal Mode, VRS ≤ 0.3 × VCC (see Figure 8-1 on page 9)
8.1
Delay TXD to bus active VRS = 0V
td(TXD-BUS_ON)
120
180
ns
A
8.2
Delay TXD to bus
inactive
VRS = 0V
td(TXD-BUS_OFF)
50
100
ns
A
8.3
Delay TXD to RXD,
recessive to dominant
VRS = 0V
td_activ(TXD-RXD)
200
420
ns
A
8.4
Delay TXD to RXD,
dominant to recessive
VRS = 0V
td_inactiv(TXD-RXD)
180
460
ns
A
8.5
Difference between
Delay TXD to RXD
dominant to Delay
recessive
tdiff = td_activ(TXD-RXD)
– td_inactiv(TXD-RXD)
80
ns
A
450
ns
A
9
6, 7
tdiff
–280
Timing Characteristics Standby Mode VRS ≥ 0.87 × VCC
9.1
Bus dominant to RXD
low in Standby Mode
9.2
Wake up time after
Standby Mode (time
TXD = 0V
delay between Standby
VRS from 0V to VCC
to Normal Mode and to
bus dominant)
VRS = VCC
4
tdRxDL
6, 7
Twake_up
2
µs
A
10.1
Input voltage for Normal
VRS = VCC
Mode
8
VRS
0.3 × VCC
V
A
10.2
Input current for Normal
VRS = 0V
Mode
8
IRS
–700
µA
A
10.3
Input voltage for
Standby Mode
8
Vstby
0.87 ×
VCC
V
A
10
300
Standby/Normal Mode Selectable via RS (Pin 8)
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
8
ATA6660
4582E–AUTO–02/08
ATA6660
Figure 8-1.
Timing Diagrams
HIGH
TXD
LOW
Dominant
CANH
CANH
CANL
Dominant
CANL
Dominant
(Bus Active)
0.9V
Vdiff
0.5V
Recessive
(Bus Inactive)
HIGH
0.7VCC
RXD
0.3VCC
LOW
t(TXD_bus_on)
td(TXD_bus_off)
td_activ(TXD_RXD)
td_inactiv(TXD_RXD)
9
4582E–AUTO–02/08
Figure 8-2.
Test Circuit for Timing Characteristics
TXD
GND
VCC
+ 5V
RXD
C = 47 µF
Figure 8-3.
C = 100 nF
1
8
2
7
3
ATA6660
6
5
4
RS
CANH
CANL
RL = 62Ω
CL = 100pF
Vref
C = 15 pF
Bus Application with Split Termination Concept
Bus Line
End Node
RS
7
CANH
6
CANL
5
+ 5V
2
GND
8
TXD
1
CAN
Controller
Vref
ATA6660
3
VCC
4
RXD
CSPLIT = 10 nF
RL = 60Ω
RL = 60Ω
Bus Line
Stub Node
RL = 1.3 kΩ
C = 15 pF
C = 47 µF C = 100 nF
RL = 1.3 kΩ
8
RS
7
CANH
6
CANL
5
VCC
Vref
ATA6660
3
+ 5V
2
GND
1
TXD
CAN
Controller
4
RXD
CSPLIT = 10 nF
RL = 60Ω
C = 47 µF C = 100 nF
10
RL = 60Ω
C = 15 pF
CSPLIT = 10 nF
Bus Line
End Node
ATA6660
4582E–AUTO–02/08
ATA6660
9. Ordering Information
Extended Type Number
Package
Remarks
ATA6660-TAPY
SO8
Can transceiver, Pb-free, 1k, taped and reeled
ATA6660-TAQY
SO8
Can transceiver, Pb-free, 4k, taped and reeled
10. Package Information
Package: SO 8
Dimensions in mm
5±0.2
4.9±0.1
0.1+0.15
1.4
0.2
3.7±0.1
0.4
1.27
3.8±0.1
6±0.2
3.81
8
5
technical drawings
according to DIN
specifications
1
4
Drawing-No.: 6.541-5031.01-4
Issue: 1; 15.08.06
11
4582E–AUTO–02/08
11. Revision History
Please note that the following page numbers referred to in this section refer to the specific revision
mentioned, and not to this document.
12
Revision No.
History
4582E-BCD-02/08
• Put datasheet in the newest template
• Section 9 “Ordering Information” on page 11 changed
4582D-BCD-06/06
• Put datasheet in the newest template
• Pb-free logo on page 1 deleted
• Section 9 “Ordering Information” on page 11 changed
4582C-BCD-09/05
•
•
•
•
Put datasheet in the newest template
Pb-free logo on page 1 added
Heading rows on Table “Absolute Maximum Ratings” on page 5 added
Section 9 “Ordering Information” on page 11 changed
ATA6660
4582E–AUTO–02/08
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4582E–AUTO–02/08