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| 型号： | MAX9921AUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR HALL EFFECT 10-MSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 霍尔效应传感器 |
| 输入类型： | 电压 |
| 输出类型： | 逻辑 |
| 接口： | 2 线 |
| 电流 - 电源： | 1.3mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
MAX9921
Dual, 2-Wire Hall-Effect Sensor Interface
with Diagnostics
______________________________________________________________________________________
11
Hall Sensor Protection from Supply Transients
If the VBAT voltage is lower than 6V or exceeds 18V,
IN1 and IN2 shut off current to both Hall sensors and
ERR, OUT1, and OUT2 go low. When VBAT returns to
the proper range, both IN1 and IN2 restart, following a
blanking cycle.
Hall Inputs Open Condition
If either IN1 or IN2 is open (IIN < 2mA), the correspond-
ing input shuts off current to the Hall sensor. If IN1 or
IN2 is loaded, it exits the open input fault condition and
restarts the corresponding Hall input, following a blank-
ing cycle.
Hall Input Shorted to Battery
If either IN1 or IN2 is shorted to the battery (VIN > VBAT
+ 100mV), the MAX9921 shuts off current to the corre-
sponding Hall sensor. In this case, if IN1 or IN2 is more
than 1V above VBAT, it may back-drive current into
BAT. In such a condition, the current level in the Hall
input should not exceed 100mA. Therefore, all the
MAX9921s together can share a separate reverse-
polarity protection diode to avoid powering up other cir-
cuitry sharing a common diode (Figure 3).
INPUT
OUTPUT
DIAG
ERR
OUT1
OUT2
DIAGNOSIS
1
0
No fault
1
0
1
IN1 open circuit, or IN1 open circuit and fault on IN2
1
0
1
0
IN1 shorted to battery, or IN1 shorted to battery and fault on IN2
1
0
1
IN1 shorted to ground, or IN1 shorted to ground and fault on IN2
11
0
VBAT out of range, or power-up or restart and blanking cycle (dominant
fault masks all other faults)
1
0
1
IN2 open circuit
1
0
IN2 shorted to battery
1
IN2 shorted to ground
Table 2. Diagnostic Truth Table (Diagnostic Mode)
BAT
ISET
MAX9921
IN1
IN2
GND
DIAG
OE
ERR
OUT1
OUT2
BAT
GND
OTHER
CIRCUITRY
RISET
BATTERY
REVERSE-POLARITY DIODE
FOR MAX9921s
REVERSE-POLARITY DIODE
FOR OTHER CIRCUITRY
RISET
ISET
MAX9921
IN1
IN2
GND
DIAG
OE
ERR
OUT1
OUT2
Figure 3. Several MAX9921s Connected to a Common Reverse-Polarity Diode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9921EVKIT+ | 功能描述:界面开发工具 MAX9921 Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX9922ABT+T | 制造商:Maxim Integrated Products 功能描述:ULTRA-PRECISION, HIGH-SIDE CURRENT-SENSE AMPLIFIERS - Tape and Reel |
| MAX9922AUB+ | 功能描述:电流灵敏放大器 Current-Sense Amplifier RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX9922AUB+T | 功能描述:电流灵敏放大器 Current-Sense Amplifier RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX9922EUB+ | 功能描述:电流灵敏放大器 Current-Sense Amplifier RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
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