A1128LLTTR-T Datasheet, PDF (4/20 Pages) Allegro MicroSystems – Highly Programmable Hall-Effect Switch

A1128
Highly Programmable Hall-Effect Switch
OPERATING CHARACTERISTICS (continued) Valid with T_A = –40°C to 150°C, C_BYPASS = 0.1 μF, V_CC = 12 V,
unless otherwise noted
Characteristic
Symbol
Test Conditions
Min.
Typ.
MAGNETIC CHARACTERISTICS valid V_CC = 3 to 24 V, T_J ≤ T_J(max), unless otherwise noted
Pre-Programming B_OP Target
B_OPinit
T_A = 25°C, BOPPOL = 0
T_A = 25°C, BOPPOL = 1
Switchpoint Thermal Drift⁵
ΔB_OP
LT package, B_OP = ±650 G
UA package, B_OP = ±650 G
Hysteresis
B_hys
B_OP - B_RP
PROGRAMMING CHARACTERISTICS
–
–
–0.14
–0.08
5
–35
35
–0.03
0.00
15
Switchpoint Magnitude Selection Bits
Switchpoint Polarity Bits
Output Polarity Bits
Fall Time Bits
Device Lock Bits
Programmable B_OP Range
Bit_BOPSEL
Bit_BOPPOL
Bit_POL
Bit_FALL
Bit_LOCK
B_OP
T_A = 25°C, BOPPOL = 1 (minimum at
BOPSEL = 255, maximum at BOPSEL = 0)
T_A = 25°C, BOPPOL = 0 (minimum at
BOPSEL = 0, maximum at BOPSEL = 255)
–
8
–
1
–
1
–
2
–
1
–650
–
–20
–
B_OP Step Size
Res_BOP Bit = LSB of BOPSEL
1_{1 G (gauss) = 0.1 mT (millitesla).}
2_{Output state when device configured as shown in figure 1.}
3_{Output Rise Time is governed by external circuit tied to VOUT.}
4_{Measured from 10% to 90% steady state output.}
5_{Internal trimming utilized to minimize switchpoint drift across the operating temperature range.}
–
4
Max.
–
–
0.08
0.08
30
–
–
–
–
–
20
650
8
Unit¹
G
G
%/°C
%/°C
G
Bit
Bit
Bit
Bit
Bit
G
G
G
Allegro MicroSystems, LLC
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com