Datenblatt-pdf.com


A1190-F Schematic ( PDF Datasheet ) - Allegro

Teilenummer A1190-F
Beschreibung Two-Wire Hall-Effect Switches
Hersteller Allegro
Logo Allegro Logo 




Gesamt 22 Seiten
A1190-F Datasheet, Funktion
A119x and A119x-F
Programmable, Chopper-Stabilized, Two-Wire Hall-Effect Switches
FEATURES AND BENEFITS
▪ Choice of factory-set temperature coefficient (TC) for use
with ferrite or rare-earth magnets
▪ Field programmable for optimized switchpoints
▪ AEC-Q100 automotive qualified
▫ On-board voltage regulator: 3 to 24 V operation
▪ High-speed, 4-phase chopper stabilization
▫ Low switchpoint drift throughout temperature range
▫ Low sensitivity to thermal and mechanical stresses
▪ On-chip protection
▫ Supply transient protection
▫ Reverse-battery protection
▫ Industry-leading ISO 7637-2 performance through use of
proprietary, 40 V clamping structure
▪ Solid-state reliability
▪ Robust EMC and ESD performance
▪ UB package with integrated 0.1 µF bypass capacitor
Packages
3-pin SOT23-W
2 mm × 3 mm × 1
mm (suffix LH)
3-pin ultramini SIP
1.5 mm × 4 mm × 3
mm (suffix UA)
2-pin ultramini SIP
1.5 mm × 4 mm × 4
mm (suffix UB)
Not to scale
DESCRIPTION
The A119x and A119x-F comprise a family of two-wire,
unipolar, Hall-effect switches, which can be trimmed by the
user at end-of-line to optimize magnetic switchpoint accuracy
in the application. The latter (-F option) are temperature-
compensated for use with ferrite magnets. These devices are
produced on theAllegroadvanced BiCMOS wafer fabrication
process, which implements a patented high-frequency, 4-phase,
chopper stabilization technique. This technique achieves
magnetic stability over the full operating temperature range,
and eliminates offsets inherent in devices with a single Hall
element that are exposed to harsh application environments.
The A119x and A119x-F family has a number of automotive
applications. These include sensing seat track position, seat belt
buckle presence, hood/trunk latching, and shift selector position.
Two-wire unipolar switches are particularly advantageous in
cost-sensitive applications because they require one less wire
for operation versus the more traditional open-collector output
switches. Additionally, the system designer inherently gains
diagnostics because there is always output current flowing,
which should be in either of two narrow ranges. Any current
level not within these ranges indicates a fault condition.
All family members are offered in three package styles. The LH
is a SOT-23W style, miniature, low-profile package for surface-
mount applications. The UA is a 3-pin, ultra-mini, single inline
package (SIP) for through-hole mounting. The UB is a 2-pin single
inline package (SIP) for through-hole mounting that integrates
the power supply decoupling capacitor. All three packages are
lead (Pb) free, with 100% matte-tin leadframe plating.
UB package only
V+ VCC
LH & UA
package
only
0.01 µF
0.1 µF
Regulator
To all subcircuits
Clock/Logic
Program / Lock
Offset Adjust
ICC Adjust
Amp
Polarity
Low-Pass
Filter
Schmitt
Trigger
A1190-DS, Rev. 7
Functional Block Diagram
GND
UA package only
GND






A1190-F Datasheet, Funktion
A119x and A119x-F
Programmable, Chopper-Stabilized,
Two-Wire Hall-Effect Switches
THERMAL CHARACTERISTICS: may require derating at maximum conditions; see application information
Characteristic
Symbol
Test Conditions*
Package LH, on 1-layer PCB based on JEDEC standard
Package Thermal Resistance
Package LH, on 2-layer PCB with 0.463 in.2 of copper area each side
RθJA
Package UA, on 1-layer PCB with copper limited to solder pads
Package UB, on 1-layer PCB with copper limited to solder pads
*Additional thermal information available on the Allegro website.
Value Unit
228 ºC/W
110 ºC/W
165 ºC/W
213 ºC/W
Power Derating Curve
25
24
23
22
21
20
19
18
17
16
15
14
2-layer PCB, Package LH
(RθJA = 110ºC/W)
13
12
1-layer PCB, Package UA
11 (RθJA = 165ºC/W)
10
9
1-layer PCB, Package UB
8 (RθJA = 213ºC/W)
7
6
1-layer PCB, Package LH
5 (RθJA = 228ºC/W)
4
3
2
20 40 60 80 100 120 140
Temperature (ºC)
160
VCC(max)
VCC(min)
180
Power Dissipation vs. Ambient Temperature
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
2-layer PCB, Package LH
(RθJA = 110ºC/W)
1-layer PCB, Package UA
(RθJA = 165ºC/W)
1-layer PCB, Package UB
(RθJA = 213ºC/W)
1-layer PCB, Package LH
(RθJA = 228ºC/W)
20 40 60 80 100 120 140 160 180
Temperature (°C)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6

6 Page









A1190-F pdf, datenblatt
A119x and A119x-F
Programmable, Chopper-Stabilized,
Two-Wire Hall-Effect Switches
PROGRAMMING GUIDELINES
Overview
Programming is accomplished by sending a series of input volt-
age pulses serially through the VCC (supply) pin of the device.
A unique combination of different voltage level pulses controls
the internal programming logic of the device to select a desired
programmable parameter and change its value. There are three
voltage levels that must be taken into account when program-
ming. These levels are referred to as high (VPH), mid (VPM), and
low (VPL) (see figure 1 and table 1).
The A119x family features two programmable modes, Try mode
and Blow mode.
• In Try mode, programmable parameter values are set and mea-
sured. A parameter value is stored temporarily, and reset after
cycling the supply voltage.
• In Blow mode, the value of a programmable parameter may
be permanently set by blowing solid-state fuses internal to the
device. Device locking is also accomplished in this mode.
The programming sequence is designed to help prevent the
device from being programmed accidentally; for example, as a
result of noise on the supply line. Although any programmable
variable power supply can be used to generate the pulse wave-
forms, Allegro highly recommends using the Allegro Sensor IC
Evaluation Kit, available through your local Allegro sales repre-
sentative. The manual for the kit provides additional information
on programming these devices, and is available for download on
the Allegro MicroSystems website.
Definition of Terms
Register. The section of the programming logic that controls the
choice of programmable modes and parameters.
Bit Field. The internal fuses unique to each register, represented
as a binary number. Changing the bit field selection in a particu-
lar register causes its programmable parameter to change, based
on the internal programming logic.
Key. A series of VPM voltage pulses used to select a register or mode.
tACTIVE
VPH tPr
tPf
tBLOW
VPM
VPL
(Supply
cycled)
0
tLOW
Programming Blow
pulses
pulse
tLOW
Figure 4. Programming pulse definition (see table 1)
Table 1. Programming Pulse Requirements, Protocol at TA = 25°C (refer also to figure 4)
Characteristic Symbol
Notes
VPL
Programming Voltage VPM Measured at the VCC pin.
VPH
tPr = 11 µs, VCC = 5 → 26 V, CBLOW = 0.1 µF (min). Minimum supply current
Programming Current
IPP
required to ensure proper fuse blowing. CBLOW must be connected between the
VCC and GND pins during programming to provide the current necessary for fuse
blowing.
Pulse Width
Pulse Rise Time
Pulse Fall Time
Blow Pulse Slew Rate
tLOW
tACTIVE
tBLOW
tPr
tPf
SRBLOW
Duration at VPL separating pulses at VPM or VPH.
Duration of pulses at VPM or VPH for key/code selection.
Duration of pulse at VPH for fuse blowing.
VPL to VPM , or VPL to VPH.
VPH to VPL , or VPM to VPL.
Min. Typ. Max. Unit
4.5 5 5.5 V
12.5 – 14 V
21 – 27 V
175 –
– mA
20 –
– µs
20 –
– µs
90 100 – µs
5 – 100 µs
5 – 100 µs
375 –
– mV/ µs
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
12

12 Page





SeitenGesamt 22 Seiten
PDF Download[ A1190-F Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
A1190-FTwo-Wire Hall-Effect SwitchesAllegro
Allegro

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche