AS8525 datasheet(13/38 Pages) AMSCO

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AS8525

Datasheet - Electrical Character i s t ics

6.2.5 LIN Transceiver

Table 10. DC Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Driver

Ibus_lim

Current limitation in Dominant State LIN=VSUP_max

120

200

LIN_VOL

Output Voltage BUS (dominant state), ILIN=40mA

(short-circuit condition tested at VOL=2.5V)

Pull-up resistor

Normal mode (recessive BUS level on TX pin)

Ibus_leak_rec

Driver OFF; 7.3V < VSUP < 18;

8V < VBUS < 18, VSUP < VBUS < 1.08 * VSUP

(to be tested at VBUS=18V)

µA

Receiver

Ibus_leak_dom

Input Leakage current at receiver

Driver OFF; Vbus=0V; VSUP=12V; VCC=5V

-1

Ibus_no_GND

VSS=VSUP;

VSUP=12V; 0V < VBUS < 18V, VCC=5V

(to be tested at VBUS=18V)

-1

Ibus_no_bat

VSUP=VSS; 0V < VBUS < 18V, VCC=VSS

(to be tested at VBUS=18V)

100

µA

Vbus_dom

0.4

VSUP

Vbus_rec

0.6

VSUP

Vbus_cnt

Vbus_cnt = (Vth_dom + Vth_rec)/2

1. Vth_dom: Receiver threshold of the recessive to dominant LIN bus edge,

Vth_rec: Receiver threshold of the dominant to recessive LIN bus edge

0.475

0.525

VSUP

Vhys

Vhys = (Vth_dom – Vth_rec)

0.05

0.175

VSUP

Table 11. AC Electrical Characteristics

Symbol

Conditions

Min

Typ

Max

Units

LIN Driver, Bus load conditions (CBUS; RBUS): 1nF; 1k

Ω / 6.8nF; 660Ω / 10nF; 500Ω

Worst case 20Kbps

transmission

Vth_rec (max) = 0.744 x VSUP;

Vth_dom (max) = 0.581 x VSUP;

VSUP = 6.0V...18V; tbit = 50μs;

D1 = tbus_rec (min) / (2 x tbit)

OTP selection = High Slew Mode

0.396

Worst case 20kbps

transmission

Vth_rec (min) = 0.422 x VSUP;

Vth_dom (min) = 0.284 x VSUP;

VSUP = 6V...18V; tbit = 50μs;

D2 = tbus_rec (max) / (2 x tbit)

OTP selection = High Slew Mode

0.581

Worst case 10.4kbps

transmission

Vth_rec (max) = 0.778 x VSUP;

Vth_dom (max) = 0.616 x VSUP;

VSUP = 6.0V...18V; tbit = 96μs;

D3 = tbus_rec (min) / (2 x tbit)

OTP selection = Low Slew Mode

0.417

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