Field-Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switches
A3250 and
A3251
10
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
The pulse sequences consist of the following groups of pulses:
1. An enable sequence.
2. A bitfield address sequence.
3. When permanently setting the bitfield, a long V
PH
fuse-blow-
ing pulse. (Note: Blown bit fuses cannot be reset.)
4. When permanently setting the bitfield, the level of V
CC
must
be allowed to drop to zero between each pulse sequence, in
order to clear all registers. However, when provisionally set-
ting bitfields, V
CC
must be maintained at V
PL
between pulse
sequences, in order to maintain the prior bitfield settings while
preparing to set additional bitfields.
Bitfields that are not set are evaluated as zeros. The bitfield-level
fuses for 0 value bitfields are never blown. This prevents inad-
vertently setting the bitfield to 1. Instead, blowing the device-
level fuse protects the 0 bitfields from being accidentally set in
the future.
When provisionally trying the calibration value, one pulse
sequence is used, using decimal values. The sequence for setting
the value 5
10
is shown in figure 2.
When permanently setting values, the bitfields must be set indi-
vidually, and 5
10
must be programmed as binary 101. Bit 3 is
set to 1 (000100
2
, which is 4
10
), then bit 1 is set to 1 (000001
2
,
which is 1
10
). Bit 2 is ignored, and so remains 0.Two pulse
sequences for permanently setting the calibration value 5 are
shown in figure 3. The final V
PH
pulse is maintained for a longer
period, enough to blow the corresponding bitfield-level fuse.
V
PH
V+
t
V
PM
V
PL
0
Encode 00100
2
(4
10
)
Enable
Address
Address
Blow
Blow
Enable
Encode 00001
2
(1
10
)
Figure 3. Pulse sequence to permanently encode calibration value 5 (101 binary, or
bitfield address 3 and bitfield address 1).
V
PH
V+
t
V
PM
V
PL
0
Try 5
10
Enable
Address
Clear
Optional
Monitoring
Figure 2. Pulse sequence to provisionally try calibration value 5.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
A3260LUA
IC SW HALL EFFECT BIPO 3-SIP
A3282LLHLT-T
IC SW HALL EFFECT CHOPPER SOT23W
A3340EUA-T
IC SW HALL EFFECT PREC 3-SIP
A3422LKA-T
IC SENSOR DIRECT/DETECT 5-SIP
AAH002-02
SENSORS MAGNETIC FIELD 8SOIC
AD221-00
SENS MAG SW 20G CROS AXIS 8-MSOP
ADH025-00
SENSOR MAG SW 10G CRS AXS 8-MSOP
ADL024-14E
DIGITAL SWITCH 55HZ ULLGA
相关代理商/技术参数
A3251LUATL
制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches
A325400284-200
制造商: 功能描述: 制造商:undefined 功能描述:
A32550-0009
功能描述:重负荷电源连接器 A32 SOCKET 50mm 50MMSKTCON RoHS:否 制造商:Hirose Connector 系列:PS2 产品类型:Connectors 位置/触点数量: 端接类型:Crimp 触点材料: 触点电镀:Gold 电压额定值: 电流额定值:300 A 附件类型:
A32550-0049
功能描述:重负荷电源连接器 A32 SOCKET 50mm WITH 2 AUX/2 PILOT CONT RoHS:否 制造商:Hirose Connector 系列:PS2 产品类型:Connectors 位置/触点数量: 端接类型:Crimp 触点材料: 触点电镀:Gold 电压额定值: 电流额定值:300 A 附件类型:
A32550-1009
功能描述:重负荷电源连接器 A32 SOCKET 50mm 50MMSKTCON RoHS:否 制造商:Hirose Connector 系列:PS2 产品类型:Connectors 位置/触点数量: 端接类型:Crimp 触点材料: 触点电镀:Gold 电压额定值: 电流额定值:300 A 附件类型:
A32550-1019
功能描述:重负荷电源连接器 A32 SOCKET 50mm WITH 2.5mm AUX CONT RoHS:否 制造商:Hirose Connector 系列:PS2 产品类型:Connectors 位置/触点数量: 端接类型:Crimp 触点材料: 触点电镀:Gold 电压额定值: 电流额定值:300 A 附件类型:
A32550-1049
功能描述:重负荷电源连接器 A32 SOCKET 50mm WITH 2 AUX/2 PILOT CONT RoHS:否 制造商:Hirose Connector 系列:PS2 产品类型:Connectors 位置/触点数量: 端接类型:Crimp 触点材料: 触点电镀:Gold 电压额定值: 电流额定值:300 A 附件类型:
A32570-0009
功能描述:重负荷电源连接器 A32 SOCKET 70mm 70MMSKTCON RoHS:否 制造商:Hirose Connector 系列:PS2 产品类型:Connectors 位置/触点数量: 端接类型:Crimp 触点材料: 触点电镀:Gold 电压额定值: 电流额定值:300 A 附件类型: