A3985SLDTR-T View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

MFG CO.

A3985SLDTR-T

Digitally Programmable Dual Full-Bridge MOSFET Driver

Allegro MicroSystems 

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A3985

Digitally Programmable

Dual Full-Bridge MOSFET Driver

ELECTRICAL CHARACTERISTICS, continued, at TA = 25°C, VDD = 5 V, VBB = 12 to 50 V, unless noted otherwise

Characteristics

Symbol

Test Conditions

Min. Typ. Max. Units

Serial Data Timing

Serial Clock High Time

tSCKH

50

–

–

ns

Serial Clock Low Time

tSCKL

50

–

–

ns

Strobe Lead Time

tSTLD

30

–

–

ns

Strobe Lag Time

tSTLG

30

–

–

ns

Strobe High Time

tSTRH

150

–

–

ns

Data Out Enable Time

tSDOE

–

–

40

ns

Data Out Disable Time

tSDOD

–

–

30

ns

Data Out Valid Time from SCK Falling

tSDOV

–

–

40

ns

Data Out Hold Time from SCK Falling

tSDOH

5

–

–

ns

Data In Set-up Time to SCK Rising

tSDIS

15

–

–

ns

Data In Hold Time from SCK Rising

tSDIH

10

–

–

ns

WC Set-up Time to STR Rising

tSWCS

15

–

–

ns

WC Hold Time from STR Rising

tSWCH

50

–

–

ns

WC Hold Time from STR Falling

tSLWCH

30

–

–

ns

1For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.

2Current Trip Point Error is the difference between actual current trip point and the target current trip point, referred to full

scale (100%) current: EITrip = 100 × (ITripActual – ITripTarget) / IFullScale %

Serial Data Timing Diagram

WC

STR

SCK

tSTLD

SDI

tSDOE

SDO

**

tSCKH

tSDIS

D18

tSDIH

tSDOV

tSDOH

D18*

tSLWCH

tSCKL

D17

D17*

Dx = Current data transfer block

Dx* = Previous data transfer block

** = Undefined, usually LSB from previous transfer

tSWCS

tSWCH

tSTLG

tSTRH

D0

tSDOD

D0*

Allegro MicroSystems, Inc.

6

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

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