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参数资料
| 型号： | A1185LLHLT-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 13/15页 |
| 文件大小： | 509K |
| 描述： | IC SWITCH HALL EFFECT UNI SOT-23 |
| 标准包装： | 3,000 |
| 传感范围： | 10G ~ 60G 跳闸 - 可编程，固定释放 |
| 类型： | 单极开关 |
| 电源电压： | 3.5 V ~ 24 V |
| 电流 - 电源： | 6.9mA |
| 输出类型： | 数字，开路集电极 |
| 特点： | 可编程 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | SOT-23W |
| 供应商设备封装： | SOT-23W |
| 包装： | 带卷 (TR) |
Ultrasensitive Two-Wire Field-Programmable
Chopper-Stabilized Unipolar Hall Effect Switches
A1185 and
A1186
12
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
V
PH
V+
t
V
PM
V
PL
0
Address 1
Address 2
Address n ( d 127)
Figure 8. Pulse sequence to select addresses
Falling edge of final B
OP
address digit
V
PH
V+
t
V
PM
V
PL
0
Encode Lock Bit
Enable
Address
Blow
128 pulses
Figure 9. Pulse sequence to encode lock bit
Lock Bit Programming. After the desired B
OP
calibration value
is programmed, and all of the corresponding bitfield-level fuses
are blown, the device-level fuse should be blown. To do so, the
lock bit (bitfield address 32) should be encoded as 1 and have
its fuse blown. This is done in the same manner as permanently
setting the other bitfields, as shown in figure 9.
Enabling Addressing Mode. The first segment of code is a
keying sequence used to enable the bitfield addressing mode. As
shown in figure 7, this segment consists of one short V
PH
pulse,
one V
PM
pulse, and one short V
PH
pulse, with no supply inter-
ruptions. This sequence is designed to prevent the device from
being programmed accidentally, such as by noise on the supply
line.
Figure 7. Addressing mode enable pulse sequence
V
PH
V+
t
V
PM
V
PL
0
Address Selection. After addressing mode is enabled, the
target bitfield address, is indicated by a series of V
PM
pulses, as
shown in figure 8.
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