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A3985 Datasheet(PDF) 6 Page - Allegro MicroSystems

Part No. A3985
Description  Digitally Programmable Dual Full-Bridge MOSFET Driver
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3985 Datasheet(HTML) 6 Page - Allegro MicroSystems

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Digitally Programmable
Dual Full-Bridge MOSFET Driver
A3985
6
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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 %
WC
SDO
SDI
SCK
STR
tSWCH
tSWCS
tSDIH
tSDIS
tSDOH
tSDOV
tSDOD
tSDOE
tSTRH
tSTLG
tSTLD
tSCKL
tSCKH
tSLWCH
D17
D0
D17*
D18*
D0*
D18
** = Undefined, usually LSB from previous transfer
Dx = Current data transfer block
Dx* = Previous data transfer block
**
Serial Data Timing Diagram


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