ATA6625 - Complete

ATA6625
LIN Bus Transceiver with Integrated Voltage Regulator
DATASHEET
Features
● Supply voltage up to 40V
● Operating voltage VS = 5V to 28V
● Typically 9µA supply current during sleep mode
● Typically 47µA Supply current in silent mode
● Very low current consumption at low supply voltages (2V < VS < 5.5V):
typically 130µA
● Linear low-drop voltage regulator, 85mA current capability:
● MLC (multi-layer ceramic) capacitor with 0 ESR
● Normal, fail-safe, and silent mode:
● VCC = 5.0V ±2%
● Sleep mode: VCC is switched off
● VCC undervoltage detection with reset open drain output NRES (4ms reset time)
● Voltage regulator is short-circuit and over-temperature protected
● LIN physical layer according to LIN 2.0, 2.1, 2.2, 2.2A and SAEJ2602-2
● Wake-up capability via LIN bus (100µs dominant)
● TXD time-out timer
● Bus pin is overtemperature and short-circuit protected versus GND and battery
● Advanced EMC and ESD performance
● Fulfills the OEM “Hardware Requirements for LIN in Automotive Applications
Rev1.3”
● Interference and damage protection according to ISO7637
● Qualified according to AEC-Q100
● Package: SO8
9376A-AUTO-01/16
1.
Description
The Atmel® ATA6625 is a fully integrated LIN transceiver, designed according to the LIN specification 2.0 and 2.1, with a
low-drop voltage regulator (5V/85mA). The combination of voltage regulator and bus transceiver makes it possible to
develop simple, but powerful, slave nodes in LIN Bus systems. The Atmel ATA6625 is designed to handle the low-speed
data communication in vehicles (for example, in convenience electronics). Improved slope control at the LIN driver ensures
secure data communication up to 20kBaud. The bus output is designed to withstand high voltage. Sleep mode (voltage
regulator switched off) and silent mode (communication off; VCC voltage on) guarantee minimized current consumption.
Figure 1-1. Block Diagram
ATA6625
VCC
-
5
VS
4
LIN
8
VCC
7
NRES
Normal and
Fail-safe
Mode
Receiver
RXD
1
+
RF-filter
VCC
Wake-up bus timer
TXD
EN
6
TXD
Time-out
timer
Slew rate control
2
Control
unit
GND
3
Short circuit and
overtemperature
protection
Sleep
mode
VCC
switched
off
Normal/Silent/
Fail-safe Mode
5V
Undervoltage reset
2
ATA6625 [DATASHEET]
9376A–AUTO–01/16
2.
Pin Configuration
Figure 2-1. Pinning
VS
EN
GND
LIN
Table 2-1.
1
2
3
4
8
7
SO8
6
5
VCC
NRES
TXD
RXD
Pin Description
Pin
Symbol
Function
1
VS
Battery supply
2
EN
Enables normal mode if the input is high
3
GND
4
LIN
LIN bus line input/output
5
RXD
Receive data output
6
TXD
Transmit data input
7
NRES
8
VCC
Ground, heat sink
Output undervoltage reset, low at reset
Output voltage regulator 5V/85mA
3.
Functional Description
3.1
Physical Layer Compatibility
Since the LIN physical layer is independent from higher LIN layers (e.g., LIN protocol layer), all nodes with a LIN physical
layer according to revision 2.x can be mixed with LIN physical layer nodes, which are according to older versions (i.e., LIN
1.0, LIN 1.1, LIN 1.2, LIN 1.3) without any restrictions.
3.2
Supply Pin (VS)
LIN operating voltage is VS = 5V to 28V. An undervoltage detection is implemented to disable transmission if VS falls below
5V, in order to avoid false bus messages. After switching on VS, the IC starts with the fail-safe mode and the voltage
regulator is switched on.
The supply current in sleep mode is typically 9µA and 47µA in silent mode.
3.3
Ground Pin (GND)
The IC does not affect the LIN Bus in the event of GND disconnection. It is able to handle a ground shift up to 11.5% of VS.
3.4
Voltage Regulator Output Pin (VCC)
The internal 5V voltage regulator is capable of driving loads up to 85mA, supplying the microcontroller and other ICs on the
PCB and is protected against overload by means of current limitation and overtemperature shut-down. Furthermore, the
output voltage is monitored and will cause a reset signal at the NRES output pin if it drops below a defined threshold Vthun.
ATA6625 [DATASHEET]
9376A–AUTO–01/16
3
3.5
Undervoltage Reset Output (NRES)
If the VCC voltage falls below the undervoltage detection threshold of Vthun, NRES switches to low after tres_f (Figure 6-1 on
page 11). Even if VCC = 0V the NRES stays low, because it is internally driven from the VS voltage. If VS voltage ramps down,
NRES stays low until VS < 1.5V and then becomes highly resistant.
The implemented undervoltage delay keeps NRES low for tReset = 4ms after VCC reaches its nominal value.
3.6
Bus Pin (LIN)
A low-side driver with internal current limitation and thermal shutdown as well as an internal pull-up resistor according to LIN
specification 2.x is implemented. The voltage range is from –27V to +40V. This pin exhibits no reverse current from the LIN
bus to VS, even in the event of a GND shift or VBatt disconnection. The LIN receiver thresholds are compatible with the LIN
protocol specification.
The fall time (from recessive to dominant) and the rise time (from dominant to recessive) are slope controlled.
3.7
Input Pin (TXD)
In normal mode the TXD pin is the microcontroller interface to control the state of the LIN output. TXD must be pulled to
ground in order to drive the LIN bus low. If TXD is high or unconnected (internal pull-up resistor), the LIN output transistor is
turned off and the bus is in the recessive state.
3.8
Dominant Time-out Function (TXD)
The TXD input has an internal pull-up resistor. An internal timer prevents the bus line from being driven permanently in the
dominant state. If TXD is forced to low longer than tdom (typ. 40ms), the LIN bus driver is switched to the recessive state.
To reactivate the LIN bus driver, switch TXD to high (> 10µs).
3.9
Output Pin (RXD)
In normal mode this pin reports the state of the LIN bus to the microcontroller. LIN high (recessive state) is indicated by a
high level at RXD; LIN low (dominant state) is indicated by a low level at RXD.
The output is a push-pull stage switching between VCC and GND. The AC characteristics are measured by an external load
capacitor of 20pF.
In silent mode the RXD output switches to high.
3.10
Enable Input Pin (EN)
The Enable Input pin controls the operation mode of the device. If EN is high, the circuit is in normal mode, with transmission
paths from TXD to LIN and from LIN to RXD both active. The VCC voltage regulator operates with 5V/85mA output
capability.
If EN is switched to low while TXD is still high, the device is forced to silent mode. No data transmission is then possible, and
the current consumption is reduced to IVS typ. 47µA. The VCC regulator has its full functionality.
If EN is switched to low while TXD is low, the device is forced to sleep mode. No data transmission is possible, and the
voltage regulator is switched off.
4
ATA6625 [DATASHEET]
9376A–AUTO–01/16
4.
Modes of Operation
Figure 4-1. Modes of Operation
a: VS > 2.4V
Unpowered Mode
VBatt = 0V
b: VS < 1.9V
c: Bus wake-up event
d: NRES switches to low
e: VS < 3.9V
a
b
Fail-safe Mode
b
b
VCC: 5V
with undervoltage monitoring
Communication: OFF
d, e
EN = 1
c+d
EN = 1
c
Go to silent command
b
EN = 0
Silent Mode
TXD = 1
VCC: 5V
with undervoltage monitoring
Communication: OFF
Local wake-up event
Normal Mode
EN = 1
VCC: 5V
with undervoltage
monitoring
Go to sleep command
EN = 0
Communication: ON
Sleep Mode
TXD = 0
VCC: switched off
Communication: OFF
Table 4-1.
Modes of Operation
Mode of Operation
4.1
Transceiver
VCC
RXD
LIN
Recessive
Fail safe
OFF
5V
High,
Except after wake-up
Normal
ON
5V
LIN depending
TXD depending
Silent
OFF
5V
High
Recessive
Sleep
OFF
0V
0V
Recessive
Normal Mode
This is the normal transmitting and receiving mode of the LIN Interface, in accordance with LIN specification 2.x. The VCC
voltage regulator operates with a 5V output voltage, with a low tolerance of ±2% and a maximum output current of 85mA.
If an undervoltage condition occurs, NRES is switched to low and the IC changes its state to fail-safe mode.
ATA6625 [DATASHEET]
9376A–AUTO–01/16
5
4.2
Silent Mode
A falling edge at EN while TXD is high switches the IC into silent mode. The TXD Signal has to be logic high during the mode
select window (Figure 4-2 on page 6). The transmission path is disabled in silent mode. The overall supply current from VBatt
is a combination of the IVSsi = 47µA plus the VCC regulator output current IVCC.
In silent mode the internal slave termination between pin LIN and pin VS is disabled, and only a weak pull-up current
(typically 9µA) between pin LIN and pin VS is present. The silent mode can be activated independently from the current level
on pin LIN.
If an undervoltage condition occurs, NRES is switched to low and the IC changes its state to fail-safe mode.
A voltage less than the LIN Pre-wake detection VLINL at pin LIN activates the internal LIN receiver and starts the wake-up
detection timer.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time period (> tbus) and the following
rising edge at pin LIN (see Figure 4-3 on page 7) results in a remote wake-up request.
The device switches from silent mode to fail-safe mode, the voltage regulator remains on and the internal LIN slave
termination resistor between the LIN pin and the VS pin is switched on.
The remote wake-up request is indicated by a low level at pin RXD to interrupt the microcontroller (Figure 4-3 on page 7). EN
high can be used to switch directly to normal mode.
Figure 4-2. Switch to Silent Mode
Normal Mode
Silent Mode
EN
TXD
Mode select window
td = 3.2μs
NRES
VCC
Delay time silent mode
td_silent maximum 20μs
LIN
LIN switches directly to recessive mode
6
ATA6625 [DATASHEET]
9376A–AUTO–01/16
Figure 4-3. LIN Wake-up Waveform Diagram from Silent Mode
Bus wake-up filtering time
tbus
Fail-safe mode
Normal mode
LIN bus
RXD
VCC
High
Low
Silent mode 5V
Fail-safe mode 5V
Normal mode
EN High
EN
NRES
4.3
Undervoltage detection active
Sleep Mode
A falling edge at EN while TXD is low switches the IC into sleep mode. The TXD Signal has to be logic low during the mode
select window (Figure 4-4 on page 8). To avoid influencing the LIN-pin during the switch to sleep mode, it is possible to
switch the EN up to 3.2µs earlier to LOW than the TXD. Even if the two falling edges at TXD and EN occur at the same time,
the LIN line will remain uninfluenced.
In sleep mode the transmission path is disabled. The supply current IVSsleep from VBatt is typically 9µA. The VCC regulator is
switched off, NRES and RXD are low. The internal slave termination between pin LIN and pin VS is disabled, only a weak
pull-up current (typically 10µA) between pin LIN and pin VS is present. sleep mode can be activated independently from the
current level on pin LIN.
A voltage less than the LIN Pre-wake detection VLINL at pin LIN activates the internal LIN receiver and starts the wake-up
detection timer.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time period (> tbus) and a following
rising edge at pin LIN results in a remote wake-up request. The device switches from sleep mode to fail-safe mode.
The VCC regulator is activated and the internal LIN slave termination resistor between the LIN pin and the VS pin is switched
on.
The remote wake-up request is indicated by a low level at the RXD pin to interrupt the microcontroller (Figure 4-5 on page 8).
EN high can be used to switch directly from sleep to fail-safe mode. If EN is still high after VCC ramp up and undervoltage
reset time, the IC switches to normal mode.
ATA6625 [DATASHEET]
9376A–AUTO–01/16
7
Figure 4-4. Switch to Sleep Mode
Normal Mode
Sleep Mode
EN
Mode select window
TXD
td = 3.2μs
NRES
VCC
Delay time sleep mode
td_sleep = maximum 20μs
LIN
LIN switches directly to recessive mode
Figure 4-5. LIN Wake-up Diagram from Sleep Mode
Bus wake-up filtering time
tbus
Fail-safe Mode
Low
Low
Normal Mode
LIN bus
RXD
VCC
voltage
regulator
On state
Off state
Regulator wake-up time
EN High
EN
Reset
time
NRES
Low
Microcontroller
start-up time delay
8
ATA6625 [DATASHEET]
9376A–AUTO–01/16
4.4
Fail-safe Mode
At system power-up the device automatically switches to fail-safe mode. The voltage regulator is switched on (see Figure 61 on page 11). The NRES output switches to low for tres = 4ms and gives a reset to the microcontroller. LIN communication is
switched off. The IC stays in this mode until EN is switched to high, and changes then to the normal mode. A power down of
VBatt (VS < 1.9V) during silent or sleep mode switches the IC into the unpowered mode after power up. A logic low at NRES
switches the IC into fail-safe mode directly.
4.5
Unpowered Mode
If you connect battery voltage to the application circuit, the voltage at the VS pin increases according to the block capacitor
(see Figure 6-1 on page 11). After VS is higher than 2.4V, the IC mode changes from unpowered mode to fail-safe mode.
The VCC output voltage reaches its nominal value after tVCC. This time, tVCC, depends on the VCC capacitor and the load.
NRES is low for the reset time delay tReset; no mode change is possible during this time.
ATA6625 [DATASHEET]
9376A–AUTO–01/16
9
5.
10
Fail-safe Features
●
During a short-circuit at LIN to VBattery, the output limits the output current to IBUS_lim. Due to the power dissipation, the
chip temperature exceeds TLINoff and the LIN output is switched off. The chip cools down and after a hysteresis of Thys,
switches the output on again. RXD stays on high because LIN is high. During LIN overtemperature switch-off, the VCC
regulator is working independently.
●
During a short-circuit from LIN to GND the IC can be switched into sleep or silent mode. If the short-circuit disappears,
the IC starts with a remote wake-up.
●
The reverse current is very low < 2µA at pin LIN during loss of VBatt. This is optimal behavior for bus systems where
some slave nodes are supplied from battery or ignition.
●
During a short circuit at VCC, the output limits the output current to IVCClim. Because of undervoltage, NRES switches
to low and sends a reset to the microcontroller. The IC switches into fail-safe mode. If the chip temperature exceeds
the value TVCCoff, the VCC output switches off. The chip cools down and after a hysteresis of Thys, switches the output
on again. Because of fail-safe mode, the VCC voltage will switch on again although EN is switched off from the
microcontroller. The microcontroller can then start with normal operation.
●
●
●
●
●
Pin EN provides a pull-down resistor to force the transceiver into recessive mode if EN is disconnected.
Pin RXD is set floating if VBatt is disconnected.
Pin TXD provides a pull-up resistor to force the transceiver into recessive mode if TXD is disconnected.
If TXD is short-circuited to GND, it is possible to switch to sleep mode via ENABLE after tdom > 20ms.
If the TXD pin stays at GND level while switching into normal mode, it must be pulled to high level longer than 10µs
before the LIN driver can be activated. This feature prevents the bus line from being accidentally driven to dominant
state after normal mode has been activated (e.g., in the case of a short circuit at TXD to GND).
ATA6625 [DATASHEET]
9376A–AUTO–01/16
Voltage Regulator
Figure 6-1. VCC Voltage Regulator: Ramp Up and Undervoltage
VS
12V
5.5V
VCC
5V
Vthun
tVCC
tReset
tres_f
NRES
5V
The voltage regulator needs an external capacitor for compensation and to smooth the disturbances from the
microcontroller. It is recommended to use an MLC capacitor with C > 1.8µF and a ceramic capacitor with C = 100nF. The
values of these capacitors can be varied by the customer, depending on the application.
With this special SO8 package (fused lead frame to pin 3) an Rthja of 80K/W is achieved.
Therefore, it is recommended to connect pin 3 with a wide GND plate on the printed board to get a good heat sink.
The main power dissipation of the IC is created from the VCC output current IVCC, which is needed for the application.
Figure 6-2 shows the safe operating area of the Atmel® ATA6625 in the SO8 package.
Figure 6-2. SO8 Package Power Dissipation: Safe Operating Area: VCC Output Current versus Supply Voltage VS at
Different Ambient Temperatures Due to Rthja = 80K/W
90
80
70
IVCC (mA)
6.
60
Tamb = 85°C
50
40
Tamb = 95°C
30
Tamb = 105°C
Tamb = 115°C
20
10
0
5
6
7
8
9
10
11
12
13
14
15
16
17
18
VS (V)
To program the microcontroller it may be necessary to supply the VCC output via an external power supply while the VS Pin
of the system basis chip is disconnected. This will not affect the system basis chip.
ATA6625 [DATASHEET]
9376A–AUTO–01/16
11
7.
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.
Supply voltage VS
VS
–0.3
Pulse time ≤ 500ms
Ta = 25°C
Output current IVCC ≤ 85mA
Pulse time ≤ 2min
Ta = 25°C
Output current IVCC ≤ 85mA
Max.
Unit
+40
V
VS
+43.5
V
VS
28
V
+5.5
V
+2
mA
–27
+40
+43.5
V
V
–0.3
+5.5
+200
V
mA
Logic pins (RxD, TxD, EN, NRES)
Typ.
–0.3
Output current NRES
INRES
LIN
- DC voltage
- Pulse time < 500ms
VLIN
VCC
- DC voltage
- DC input current
ESD according to IBEE LIN EMC
Test specification 1.0 following IEC 61000-4-2
- Pin VS, LIN to GND
±6
KV
ESD HBM following STM5.1
with 1.5k/100pF
- Pin VS, LIN to GND
±6
KV
±3
KV
CDM ESD STM 5.3.1
±750
V
Machine Model ESD
AEC-Q100-RevF(003)
±200
V
HBM ESD
ANSI/ESD-STM5.1
JESD22-A114
AEC-Q100 (002)
Junction temperature
Tj
–40
+150
°C
Storage temperature
Ts
–55
+150
°C
8.
Thermal Characteristics
Parameters
Package
Symbol
Heat sink at GND (pin 3) on PCB
SO8
Rthja
Thermal shutdown of VCC regulator
SO8
TVCCoff
150
165
180
°C
Thermal shutdown of LIN output
SO8
TLINoff
150
165
180
°C
Thermal shutdown hysteresis
SO8
Thys
12
ATA6625 [DATASHEET]
9376A–AUTO–01/16
Min.
Typ.
Max.
80
10
Unit
K/W
°C
9.
Electrical Characteristics
5V < VS < 28V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
1
1.1
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
VS
VS
5
13.5
28
V
A
VS
IVSsleep
6
9
12
µA
B
VS
IVSsleep
3
10
15
µA
A
Sleep mode, VLIN = 0V
bus shorted to GND
VS < 14V
VS
IVSsleep_short
20
50
100
µA
A
Bus recessive
5.5V< VS < 14V
without load at VCC
T = 27°C
VS
IVSsilent
30
47
58
µA
B
Bus recessive
5.5V< VS < 14V
without load at VCC
VS
IVSsilent
30
50
64
µA
A
Bus recessive
2.0V< VS < 5,5V
without load at VCC
VS
IVSsilent
50
130
170
µA
A
Silent mode
5.5V< VS < 14V
bus shorted to GND
without load at VCC
VS
IVSsilent_short
50
80
120
µA
A
VS Pin
Nominal DC voltage
range
Sleep mode
VLIN > VS – 0.5V
VS < 14V, T = 27°C
1.2
1.3
Sleep mode
Supply current in sleep
VLIN > VS – 0.5V
mode
VS < 14V
Supply current in silent
mode (SBC) /
Active mode (voltage
regulator)
1.4
Supply current in
normal mode
Bus recessive
VS < 14V
without load at VCC
VS
IVSrec
150
230
300
µA
A
1.5
Supply current in
normal mode
Bus dominant (internal
LIN pull-up resistor active)
VS < 14V
without load at VCC
VS
IVSdom
200
700
950
µA
A
Bus recessive
5.5V < VS < 14V
without load at VCC
VS
IVSfail
40
55
80
µA
A
Bus recessive
2.0V < VS < 5.5V
without load at VCC
VS
IVSfail
50
130
170
µA
A
1.7
VS undervoltage
threshold (switching
from normal to fail-safe
mode)
VS
VSth
3.9
4.4
4.9
V
A
1.8
VS undervoltage
threshold hysteresis
VS
VSth_hys
0.1
0.25
0.4
V
A
1.6
Supply current in
fail-safe mode
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
ATA6625 [DATASHEET]
9376A–AUTO–01/16
13
9.
Electrical Characteristics (Continued)
5V < VS < 28V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
1.9
1.10
2
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
VS operation threshold
(switching to
unpowered mode)
VS
VSth_U
1.9
2.15
2.4
V
A
VS undervoltage
threshold hysteresis
VS
VSth_hys_U
0.1
0.2
0.3
V
A
0.2
0.4
V
A
V
A
RXD Output Pin
2.1
Low level output sink
capability
Normal mode
VLIN = 0V
IRXD = 2mA
RXD
VRXDL
2.2
Normal mode
High level output source
VLIN = VS
capability
IRXD = –2mA
RXD
VRXDH
VCC –
0.4V
TXD
VTXDL
–0.3
+0.8
V
A
VCC +
0.3V
V
A
100
k
A
3
3.1
TXD Input Pin
Low level voltage input
3.2
High level voltage input
3.3
Pull-up resistor
3.4
High level leakage
current
4
VCC –
0.2V
TXD
VTXDH
2
VTXD = 0V
TXD
RTXD
40
VTXD = VCC
TXD
ITXD
–3
+3
µA
A
70
EN Input Pin
4.1
Low level voltage input
EN
VENL
–0.3
+0.8
V
A
4.2
High level voltage input
EN
VENH
2
VCC +
0.3V
V
A
4.3
Pull-down resistor
VEN = VCC
EN
REN
50
200
k
A
4.4
Low level input current
VEN = 0V
EN
IEN
–3
+3
µA
A
VNRESL
0.25
V
A
0.14
V
D
6
ms
A
5
125
NRES Open Drain Output Pin
5.1
Low level output voltage
VS ≥ 5.5V
INRES = 2mA
NRES
5.2
Low level output low
10k to 5V
VCC = 0V
NRES
VNRESLL
5.3
Undervoltage reset time
VS ≥ 5.5V
CNRES = 20pF
NRES
tReset
2
5.4
Reset debounce time
for falling edge
VS ≥ 5.5V
CNRES = 20pF
NRES
tres_f
1.5
10
µs
A
5.5
Switch off leakage
current
VNRES = 5.5V
NRES
INRES_Lf
–3
+3
µA
A
5.5V < VS < 18V
(0mA to 50mA)
VCC
VCCnor
4.9
5.1
V
A
6V < VS < 18V
(0mA to 85mA)
VCC
VCCnor
4.9
5.1
V
C
VS – VD
5.1
V
A
200
mV
A
7
7.1
4
VCC Voltage Regulator
Output voltage VCC
7.2
Output voltage VCC at
low VS
4V < VS < 5.5V
VCC
VCClow
7.3
Regulator drop voltage
VS > 4V, IVCC = –20mA
VCC
VD1
100
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
14
ATA6625 [DATASHEET]
9376A–AUTO–01/16
9.
Electrical Characteristics (Continued)
5V < VS < 28V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
Test Conditions
Pin
Symbol
7.4
Regulator drop voltage
VS > 4V, IVCC = –50mA
VCC
VD2
7.5
Regulator drop voltage
VS > 3.3V, IVCC = –15mA
VCC
VD3
7.6
Line regulation
5.5V < VS < 18V
VCC
VCCline
0.1
7.7
Load regulation
5mA < IVCC < 50mA
VCC
VCCload
0.1
7.8
Power supply ripple
rejection
10Hz to 100kHz
CVCC = 10µF
VS = 14V, IVCC = –15mA
VCC
7.9
Output current limitation VS > 5.5V
VCC
IVCClim
7.10
External load capacity
MLC capacitor
VCC
Cload
1.8
7.11
VCC undervoltage
threshold
Referred to VCC
VS > 5.5V
VCC
VthunN
4.2
7.12
Hysteresis of
undervoltage threshold
Referred to VCC
VS > 5.5V
VCC
Vhysthun
250
7.13
Ramp up time
CVCC = 2.2µF
VS > 5.5V to VCC = 5V Iload = –5mA at VCC
VCC
tVCC
1
8
Min.
Typ.
Max.
Unit
Type*
300
500
mV
A
150
mV
A
0.2
%
A
0.5
%
A
dB
D
mA
A
µF
D
V
A
mV
A
ms
A
50
–180
–120
10
4.8
1.5
LIN Bus Driver: Bus Load Conditions:
Load 1 (Small): 1nF, 1k, Load 2 (Large): 10nF, 500, CRXD = 20pF,
Load 3 (Medium): 6.8nF, 660, Characterized on Samples
10.6 and 10.7 Specifies the Timing Parameters for Proper Operation at 20kBit/s and 10.8 and 10.9 at 10.4kBit/s
8.1
Driver recessive output
Load1/Load2
voltage
LIN
VBUSrec
8.2
Driver dominant voltage VVS = 7V, Rload = 500
LIN
8.3
Driver dominant voltage VVS = 18V, Rload = 500
LIN
8.4
Driver dominant voltage VVS = 7V, Rload = 1000
LIN
V_LoSUP_1k
8.5
Driver dominant voltage VVS = 18V, Rload = 1000
LIN
8.6
Pull–up resistor to VS
The serial diode is
mandatory
8.7
Voltage drop at the
serial diodes
In pull-up path with Rslave
ISerDiode = 10mA
8.8
LIN current limitation
VBUS = VBatt_max
8.9
Input leakage current at
the receiver including
pull-up resistor as
specified
0.9  VS
VS
V
A
V_LoSUP
1.2
V
A
V_HiSUP
2
V
A
0.6
V
A
V_HiSUP_1k
0.8
V
A
LIN
RLIN
20
47
k
A
LIN
VSerDiode
0.4
1.0
V
D
LIN
IBUS_lim
40
120
200
mA
A
Input Leakage current
Driver off
VBUS = 0V
VBatt = 12V
LIN
IBUS_PAS_
–1
–0.35
mA
A
8.10
Leakage current LIN
recessive
Driver off
8V < VBatt < 18V
8V < VBUS < 18V
VBUS ≥ VBatt
LIN
IBUS_PAS_rec
8.11
Leakage current when
control unit
disconnected from
ground. Loss of local
ground must not affect
communication in the
residual network
GNDDevice = VS
VBatt = 12V
0V < VBUS < 18V
LIN
IBUS_NO_gnd
30
dom
–10
10
20
µA
A
+0.5
+10
µA
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
ATA6625 [DATASHEET]
9376A–AUTO–01/16
15
9.
Electrical Characteristics (Continued)
5V < VS < 28V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
Test Conditions
Pin
Symbol
Min.
8.12
Leakage current at
disconnected battery.
Node has to sustain the
VBatt disconnected
current that can flow
VSUP_Device = GND
under this condition.
0V < VBUS < 18V
Bus must remain
operational under this
condition.
LIN
IBUS_NO_bat
8.13
Capacitance on Pin LIN
to GND
LIN
CLIN
LIN
VBUS_CNT
0.475 
VS
Typ.
Max.
Unit
Type*
0.1
2
µA
A
20
pF
D
0.525 
VS
V
A
9
LIN Bus Receiver
9.1
Center of receiver
threshold
9.2
Receiver dominant state VEN = 5V
LIN
VBUSdom
–27
0.4  VS
V
A
9.3
Receiver recessive
state
VEN = 5V
LIN
VBUSrec
0.6  VS
40
V
A
9.4
Receiver input
hysteresis
Vhys = Vth_rec – Vth_dom
LIN
VBUShys
0.028 
VS
0.175 
VS
V
A
9.5
Pre-wake detection LIN
High level input voltage
LIN
VLINH
VS – 2V
VS +
0.3V
V
A
9.6
Pre-wake detection LIN
Activates the LIN receiver
Low level input voltage
LIN
VLINL
–27
VS –
3.3V
V
A
10
Internal Timers
150
µs
A
20
µs
A
VBUS_CNT =
(Vth_dom + Vth_rec)/2
0.5 
VS
0.1 x VS
10.1
Dominant time for
wake–up via LIN bus
VLIN = 0V
LIN
tbus
50
10.2
Time delay for mode
change from Fail-safe
into normal mode via
pin EN
VEN = 5V
EN
tnorm
5
10.3
Time delay for mode
change from normal
V = 0V
mode to sleep mode via EN
pin EN
EN
tsleep
5
15
20
µs
A
10.4
TXD dominant time out
VTXD = 0V
time
TXD
tdom
20
40
60
ms
A
10.5
Time delay for mode
change from silent
V = 5V
mode into normal mode EN
via EN
EN
ts_n
5
15
40
µs
A
LIN
D1
0.396
10.6
Duty cycle 1
THRec(max) = 0.744  VS
THDom(max) = 0.581  VS
VS = 7.0V to 18V
tBit = 50µs
D1 = tbus_rec(min)/(2  tBit)
100
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
16
ATA6625 [DATASHEET]
9376A–AUTO–01/16
A
9.
Electrical Characteristics (Continued)
5V < VS < 28V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
Test Conditions
Pin
Symbol
Duty cycle 2
THRec(min) = 0.422  VS
THDom(min) = 0.284  VS
VS = 7.6V to 18V
tBit = 50µs
D2 = tbus_rec(max)/(2  tBit)
LIN
D2
Duty cycle 3
THRec(max) = 0.778  VS
THDom(max) = 0.616  VS
VS = 7.0V to 18V
tBit = 96µs
D3 = tbus_rec(min)/(2  tBit)
LIN
D3
10.9
Duty cycle 4
THRec(min) = 0.389  VS
THDom(min) = 0.251  VS
VS = 7.6V to 18V
tBit = 96µs
D4 = tbus_rec(max)/(2  tBit)
LIN
D4
10.10
Slope time falling and
rising edge at LIN
VS = 7.0V to 18V
LIN
tSLOPE_fall
tSLOPE_rise
10.7
10.8
11
Min.
Typ.
Max.
Unit
0.581
A
0.417
A
0.590
3.5
Type*
A
22.5
µs
A
6
µs
A
+2
µs
A
Receiver Electrical AC Parameters of the LIN Physical Layer
LIN Receiver, RXD Load Conditions: CRXD = 20pF
11.1
Propagation delay of
receiver Figure 9-1
VS = 7.0V to 18V
trx_pd = max(trx_pdr , trx_pdf)
11.2
Symmetry of receiver
V = 7.0V to 18V
propagation delay rising S
trx_sym = trx_pdr – trx_pdf
edge minus falling edge
RXD
trx_pd
RXD
trx_sym
–2
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
ATA6625 [DATASHEET]
9376A–AUTO–01/16
17
Figure 9-1. Definition of Bus Timing Characteristics
tBit
tBit
tBit
TXD
(Input to transmitting node)
tBus_dom(max)
tBus_rec(min)
Thresholds of
receiving node1
THRec(max)
VS
(Transceiver supply
of transmitting node)
THDom(max)
LIN Bus Signal
Thresholds of
receiving node2
THRec(min)
THDom(min)
tBus_dom(min)
tBus_rec(max)
RXD
(Output of receiving node1)
trx_pdf(1)
trx_pdr(1)
RXD
(Output of receiving node2)
trx_pdr(2)
trx_pdf(2)
Figure 9-2. Application Circuit
VCC
1
ATA6625
VBAT
VS
Master
node
pull-up
VCC
Normal and
Fail-safe
Mode
Receiver
-
RXD 5
+
100nF
22μF
1kΩ
+
4
LIN-BUS
RF filter
LIN
220pF
VCC
Microcontroller
Wake-up bus timer
TXD
EN
6
TXD
Time-out
timer
Slew rate control
2
Control
unit
GND
3
Short circuit and
overtemperature
protection
Sleep
mode
VCC
switched
off
Normal/Silent/
Fail-safe Mode
5V
8
VCC
7
NRES
10kΩ
Undervoltage reset
100nF
GND
18
ATA6625 [DATASHEET]
9376A–AUTO–01/16
10μF
10.
Ordering Information
Extended Type Number
Package
ATA6625-GAQW
11.
SO8
Remarks
5V LIN system basis chip, Pb-free, 4k, taped and reeled
Package Information
Figure 11-1. SO8
E1
L
A
b
A2
A1
C
D
e
8
E
5
technical drawings
according to DIN
specifications
Dimensions in mm
1
4
COMMON DIMENSIONS
Pin 1 identity
(Unit of Measure = mm)
Symbol
MIN
NOM
MAX
A
1.5
1.65
1.8
A1
0.1
0.15
0.25
A2
1.4
1.47
1.55
D
4.8
4.9
5
E
5.8
6
6.2
E1
3.8
3.9
4
L
0.4
0.65
0.9
C
0.15
0.2
0.25
b
0.3
0.4
0.5
e
NOTE
1.27 BSC
05/08/14
TITLE
Package Drawing Contact:
[email protected]
Package: SO8
GPC
DRAWING NO.
REV.
6.543-5185.01-4
1
ATA6625 [DATASHEET]
9376A–AUTO–01/16
19
XXXXXX
Atmel Corporation
1600 Technology Drive, San Jose, CA 95110 USA
T: (+1)(408) 441.0311
F: (+1)(408) 436.4200
|
www.atmel.com
© 2016 Atmel Corporation. / Rev.: 9376A–AUTO–01/16
Atmel®, Atmel logo and combinations thereof, Enabling Unlimited Possibilities®, and others are registered trademarks or trademarks of Atmel Corporation in U.S. and
other countries. Other terms and product names may be trademarks of others.
DISCLAIMER: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right
is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE
ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT
SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES
FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this
document and reserves the right to make changes to specifications and products descriptions at any time without notice. Atmel does not make any commitment to update the information
contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended,
authorized, or warranted for use as components in applications intended to support or sustain life.
SAFETY-CRITICAL, MILITARY, AND AUTOMOTIVE APPLICATIONS DISCLAIMER: Atmel products are not designed for and will not be used in connection with any applications where
the failure of such products would reasonably be expected to result in significant personal injury or death (“Safety-Critical Applications”) without an Atmel officer's specific written
consent. Safety-Critical Applications include, without limitation, life support devices and systems, equipment or systems for the operation of nuclear facilities and weapons systems.
Atmel products are not designed nor intended for use in military or aerospace applications or environments unless specifically designated by Atmel as military-grade. Atmel products are
not designed nor intended for use in automotive applications unless specifically designated by Atmel as automotive-grade.
Similar pages