L9952XP datasheet(21/68 Pages) STMICROELECTRONICS

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L9952GXP

Description

Doc ID 13518 Rev 5

21/68

2.15

Operational amplifiers

The operational amplifiers are especially designed to be used for sensing and amplifying the

voltage drop across ground connected shunt resistors. Therefore the input common mode

range includes - 0.2 ... 3V.

The operational amplifiers are designed for GND + 3V... GND – 0.2V input voltage swing

and rail-to-rail output voltage range. All Pins (positive, negative and outputs ) are available

to be able to operate in non-inverting and inverting mode. Both operational amplifiers are

on-chip compensated for stability over the whole operating range within the defined load

impedance.

Figure 7.

Lin master pull up

A dedicated built-in switch “Tsw” enables the LIN to act as a master. (see chapter 2.18)

2.16

LIN bus interface

General requirements:

●

Speed communication up to 20kbit/s

●

LIN 2.0 compliant (SAEJ2602 compatible) transceiver

●

Function range from +40V to -18V DC at LIN Pin

●

GND disconnection fail safe at module level

●

Off mode: does not disturb network

●

GND shift operation at system level

●

Microcontroller Interface with CMOS compatible I/O pins.

●

Pull up resistor internal.

●

ESD: immunity against automotive transients per ISO7637 specification (see

application note)

●

Matched output slopes and propagation delay

In order to further reduce the current consumption in standby mode, the integrated LIN bus

interface offers an ultra low current consumption.

con t r ol

LIN

con t r ol

30k

LIN

Gn d

M a st er node

p u ll u p

LIN PU

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