AS8520 datasheet(9/34 Pages) AMSCO

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AS8520

Preliminary Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s

6.1.2 LIN Transceiver

(4.5V < VCC < 5.5V; 6V < VSUP < 18V; -40ºC < TJ < 150ºC, VBUS is the voltage on the LIN node. All voltages are with respect to ground (VSS);

positive current flows into the pin.

Table 6. 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;

VSUP = 7.3V, 8V<VBUS<18

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

-1

Ibus_no_bat

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

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 7. AC Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(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

0.369

(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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