Rainbow-electronics ATA6624 Instrukcja Użytkownika

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Features
Master and Slave Operation Possible
Supply Voltage up to 40V
Operating voltage V
S
= 5V to 27V
Typically 10 µA Supply Current During Sleep Mode
Typically 57 µA Supply Current in Silent Mode
Linear Low-drop Voltage Regulator:
Normal, Fail-safe, and Silent Mode
ATA6622 V
CC
= 3.3V ±2%
ATA6624 V
CC
= 5.0V ±2%
ATA6626 V
CC
= 5.0V ±2%, TXD Time-out Timer Disabled
In Sleep Mode V
CC
is Switched Off
VCC- Undervoltage Detection (4 ms Reset Time) and Watchdog Reset Logical
Combined at Open Drain Output NRES
Negative Trigger Input for Watchdog
Boosting the Voltage Regulator Possible with an External NPN Transistor
LIN Physical Layer According to LIN 2.0 Specification and SAEJ2602-2
Wake-up Capability via LIN-bus, Wake Pin, or Kl_15 Pin
INH Output to Control an External Voltage Regulator or to Switch off the Master Pull Up
Resistor
TXD Time-out Timer; ATA6626 TXD Time-out Timer Is Disabled
Bus Pin is Overtemperature and Short Circuit Protected versus GND and Battery
Adjustable Watchdog Time via External Resistor
Advanced EMC and ESD Performance
ESD HBM 8 kV at Pins LIN and VS According to STM5.1
Package: QFN 5 mm × 5 mm with 20 Pins
1. Description
The ATA6622 is a fully integrated LIN transceiver, which complies with the LIN 2.0
and SAEJ2602-2 specifications. It has a low-drop voltage regulator for 3.3V/50 mA
output and a window watchdog. The ATA6624 has the same functionality as the
ATA6622; however, it uses a 5V/50 mA regulator. The ATA6626 has the same func-
tionality as ATA6624 without a TXD time-out timer. The voltage regulator is able to
source 50 mA up to V
S
= 18V. The output current of the regulator can be boosted by
using an external NPN transistor. This chip combination makes it possible to develop
inexpensive, simple, yet powerful slave and master nodes for LIN-bus systems.
ATA6622/ATA6624/ATA6626 are designed to handle the low-speed data communica-
tion in vehicles, e.g., in convenience electronics. Improved slope control at the
LIN-driver ensures secure data communication up to 20 kBaud. Sleep Mode and
Silent Mode guarantee very low current consumption. The ATA6626 is able to switch
the LIN unlimited to dominant level via TXD for low data rates.
LIN Bus
Transceiver
with 3.3V (5V)
Regulator and
Watchdog
ATA6622
ATA6624
ATA6626
4986F–AUTO–07/08
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Podsumowanie treści

Strona 1 - 1. Description

Features• Master and Slave Operation Possible• Supply Voltage up to 40V• Operating voltage VS = 5V to 27V• Typically 10 µA Supply Current During Sleep

Strona 2

104986F–AUTO–07/08ATA6622/ATA6624/ATA6626The VCC regulator is activated, and the internal LIN slave termination resistor is switched on.The remote wak

Strona 3

114986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 4-5. LIN Wake Up from Sleep Mode Table 4-1. Table of ModesMode of Operation Transceiver VCC Watchdog W

Strona 4

124986F–AUTO–07/08ATA6622/ATA6624/ATA66265. Wake-up Scenarios from Silent or Sleep Mode5.1 Remote Wake-up via Dominant Bus StateA voltage less than th

Strona 5

134986F–AUTO–07/08ATA6622/ATA6624/ATA66265.5 Fail-safe Features• During a short-circuit at LIN to VBattery, the output limits the output current to IB

Strona 6

144986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 5-1. VCC Voltage Regulator: Ramp-up and Undervoltage Detection Figure 5-2. Power Dissipation: Safe Ope

Strona 7

154986F–AUTO–07/08ATA6622/ATA6624/ATA66266. WatchdogThe watchdog anticipates a trigger signal from the microcontroller at the NTRIG (negative edge)inp

Strona 8

164986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 6-1. Timing Sequence with RWD_OSC = 51 kΩ 6.2 Worst Case Calculation with RWD_OSC = 51 kΩThe internal

Strona 9

174986F–AUTO–07/08ATA6622/ATA6624/ATA66267. Absolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent

Strona 10 - ATA6622/ATA6624/ATA6626

184986F–AUTO–07/08ATA6622/ATA6624/ATA66268. Electrical Characteristics5V < VS < 27V, -40°C < Tj < 150°C, unless otherwise specified. All v

Strona 11

194986F–AUTO–07/08ATA6622/ATA6624/ATA66263.5Low-level input current at local wake-up requestFail-safe ModeVLIN = VSVWAKE = 0VVTXD = 0.4VTXD ITXDwake22

Strona 12

24986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 1-1. Block Diagram AdjustableWatchdogOscillatorShort Circuit andOvertemperatureProtectionTXDTime-outTim

Strona 13

204986F–AUTO–07/08ATA6622/ATA6624/ATA66268.7LIN current limitationVBUS = VBatt_max LIN IBUS_LIM40 120 200 mA A8.8Input leakage current at the receiver

Strona 14

214986F–AUTO–07/08ATA6622/ATA6624/ATA662610.5Time delay for mode change from Silent Mode into Normal Mode via ENVEN = 5V ts_n51540µsA10.6 Duty cycle 1

Strona 15

224986F–AUTO–07/08ATA6622/ATA6624/ATA662613 Watchdog Oscillator13.1Voltage at WD_OSC in Normal ModeIWD_OSC = –200 µAVVS ≥ 4VVWD_OSC1.13 1.23 1.33 V A1

Strona 16

234986F–AUTO–07/08ATA6622/ATA6624/ATA662617 VCC Voltage Regulator ATA662217.1 Output voltage VCC4V < VS < 18V(0 mA to 50 mA)VCCnor3.234 3.366 V

Strona 17

244986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 8-1. Definition of Bus Timing Characteristics TXD(Input to transmitting node)VS(Transceiver supplyof t

Strona 18

254986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 8-2. Application Circuit 67 8 10920 19 18MLP 5 mm × 5 mm0.65 mm pitch20 leadATA6622/24/26161112131415T

Strona 19

264986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 8-3. Application Circuit with External NPN 67 8 10920 19 18MLP 5 mm × 5 mm0.65 mm pitch20 leadATA6622/

Strona 20

274986F–AUTO–07/08ATA6622/ATA6624/ATA662610. Package Information 9. Ordering InformationExtended Type Number Package RemarksATA6622-PGPW QFN20 3.3V LI

Strona 21

284986F–AUTO–07/08ATA6622/ATA6624/ATA662611. Revision HistoryPlease note that the following page numbers referred to in this section refer to the spec

Strona 22

4986F–AUTO–07/08Headquarters InternationalAtmel Corporation2325 Orchard ParkwaySan Jose, CA 95131USATel: 1(408) 441-0311Fax: 1(408) 487-2600Atmel Asia

Strona 23

34986F–AUTO–07/08ATA6622/ATA6624/ATA66262. Pin ConfigurationFigure 2-1. Pinning QFN20 67 8 10920 19 18QFN 5 mm × 5 mm0.65 mm pitch20 leadATA6622/24/26

Strona 24

44986F–AUTO–07/08ATA6622/ATA6624/ATA66263. Functional Description3.1 Physical Layer CompatibilitySince the LIN physical layer is independent from high

Strona 25

54986F–AUTO–07/08ATA6622/ATA6624/ATA66263.7 Input/Output Pin (TXD)In Normal Mode the TXD pin is the microcontroller interface used to control the stat

Strona 26

64986F–AUTO–07/08ATA6622/ATA6624/ATA66263.13 TM Input PinThe TM pin is used for final production measurements at Atmel®. In normal application, it has

Strona 27

74986F–AUTO–07/08ATA6622/ATA6624/ATA66264. Modes of OperationFigure 4-1. Modes of Operation 4.1 Normal ModeThis is the normal transmitting and receivi

Strona 28

84986F–AUTO–07/08ATA6622/ATA6624/ATA6626A voltage less than the LIN Pre_Wake detection VLINL at the LIN pin activates the internal LINreceiver.Figure

Strona 29

94986F–AUTO–07/08ATA6622/ATA6624/ATA6626Figure 4-3. LIN Wake Up from Silent Mode 4.3 Sleep ModeA falling edge at EN when TXD is low switches the IC in

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