AS8520 datasheet(10/34 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

(worst case

10.4kbps

transmission)

Vth_rec (min) = 0.389 x VSUP;

Vth_dom (min) = 0.251 x VSUP;

VSUP = 6V...18V; tbit = 96μs;

D4 = tbus_rec(max) / (2 x tbit)

OTP selection = Low Slew Mode

0.59

tdLR

VCC = 5v; Propagation delay bus dominant

to RX LOW

6µs

tdHR

VCC = 5v; Propagation delay bus dominant

to RX HIGH

6µs

tRS

Receiver Delay symmetry

-2

µs

twake

Wake-up delay time

150

µs

tsln

Transition from standby mode to normal

mode (clock frequency is 128KHz ± 25%)

Clock

cycles

tnsl

Transition from normal mode to standby

mode (clock frequency is 128KHz ± 25%)

Clock

cycles

trec_deb

Receiver De-bounce time

0.6

µs

Cint

Internal capacitance of the LIN node

configured as a slave

250

Table 8. Temperature Limiter

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Tsd

Shut down temperature

junction temperature

144

176

ºC

Tret

Return temperature

1 2

126

154

ºC

Totset

Over-temp warning flag set

The temperature beyond which the warning

flag is set.

126

154

ºC

Totclear

Over-temp warning flag clear

The return temperature when the warning

flag is cleared

108

132

ºC

1. During shut down, the sensor must be powered by VSUP.

2. Thermal shut down disables LDO and sets all drivers to high impedance, the IC returns from shut down with POR

Table 9. TX Timeout Watchdog

Symbol

Parameter

Conditions

Min

Typ

Max

Units

tlin_wdog

Time out duration (dominant state)

0.5

Table 7. AC Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

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