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A3250JUATL

更新时间： 2024-01-04 01:22:33
品牌 Logo 应用领域
急速微 - ALLEGRO 模拟IC开关信号电路
页数 文件大小 规格书
15页 417K
描述
Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches

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A3250JUATL 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：MODULE包装说明：,
针数：3Reach Compliance Code：compliant
风险等级：5.83模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：R-PSSO-G3JESD-609代码：e0
长度：4.105 mm功能数量：1
端子数量：3最高工作温度：150 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：245认证状态：Not Qualified
座面最大高度：1.57 mm最大供电电压 (Vsup)：24 V
最小供电电压 (Vsup)：4.2 V标称供电电压 (Vsup)：12 V
表面贴装：YES温度等级：AUTOMOTIVE
端子面层：TIN LEAD端子形式：GULL WING
端子节距：1.27 mm端子位置：SINGLE
处于峰值回流温度下的最长时间：30宽度：3.035 mm
Base Number Matches：1

A3250JUATL 数据手册

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A3250 and A3251  
Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches  
The pulse sequences consist of the following groups of pulses:  
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.  
1. An enable sequence.  
2. A bitfield address sequence.  
3. When permanently setting the bitfield, a long VPH fuse-blow-  
ing pulse. (Note: Blown bit fuses cannot be reset.) When  
provisionally trying a value, a short VPH pulse.  
Two pulse sequences for provisionally trying the calibration  
value 5 are shown in figure 2. Because the bitfields must be set  
individually, 510 must be programmed as binary 101. Bit 3 is  
set to 1 (0001002, which is 410), then bit 1 is set to 1 (0000012,  
which is 110). Bit 2 is ignored, and so remains 0.  
4. When permanently setting the bitfield, the level of VCC must  
be allowed to drop to zero between each pulse sequence, in  
order to clear all registers. However, when provisionally set-  
ting bitfields, VCC must be maintained at VPL between pulse  
sequences, in order to maintain the prior bitfield settings while  
preparing to set additional bitfields.  
Two pulse sequences for permanently setting the calibration  
value 5 are shown in figure 3. The final VPH pulse, which was  
used as a short delimiter when trying values, is maintained for a  
longer period, enough to blow the corresponding bitfield-level  
fuse.  
Bitfields that are not set are evaluated as zeros. The bitfield-level  
V+  
V
PH  
V
PM  
V
PL  
0
7 pulses  
Enable  
7 pulses  
Enable  
Address  
Address  
Clear  
t
Optional  
Monitoring  
Optional  
Monitoring  
Try 00100 (4  
10  
)
Try 00001 (1 )  
10  
2
2
Figure 2. Pulse sequence to provisionally try calibration value 5 (101 binary, or bitfield  
address 3 and bitfield address 1).  
V+  
V
PH  
V
PM  
V
PL  
7 pulses  
Enable  
7 pulses  
Enable  
Address  
Blow  
0
Address  
Blow  
Encode 00100 (4  
2
)
Encode 00001 (1  
)
10  
2
10  
t
Figure 3. Pulse sequence to permanently encode calibration value 5 (101 binary, or  
bitfield address 3 and bitfield address 1).  
Allegro MicroSystems, Inc.  
10  
115 Northeast Cutoff, Box 15036  
A3250-DS  
Worcester, Massachusetts 01615-0036 (508) 853-5000  
www.allegromicro.com  
1...78910111213...15

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