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参数资料
| 型号： | MAX8215CSD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR VOLT MPU 14-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 多压监控器 |
| 监视电压数目： | 5 |
| 输出： | 开路漏极或开路集电极 |
| 复位超时： | 标准传输延迟为 20 µs |
| 电压 - 阀值： | ±5V，±12V，可调 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 带卷 (TR) |
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
V TRIP2
MAX8215
VDD
180k
INPUT VOLTAGE
(V S )
V TRIP1
GND
V HYST ( 1 +
RA
RB
)
+VS
RA
7 DIN
MAX8216
DOUT 9
OUTPUT
VOLTAGE
V DD
RB
GND
1.24V REFERENCE
TO DETERMINE THE TRIP VOLTAGES
FROM PARTICULAR RESISTOR
VALUES:
TO CALCULATE THE REQUIRED
RESISTOR RATIOS FOR PARTICULAR
TRIP VOLTAGES:
(
)
(
RB V REF - 1
RB VREF + V HYST - 1
V TRIP = R A + R B
R B
)
( V REF )
RA
V TRIP1 = V REF 1 + RB
V TRIP2 = (V REF + V HYST ) ( 1 +
RA
RB
)
RA V TRIP1
=
RA V TRIP2
=
V HYST = 16mV TYP
Figure 2. Undervoltage/Overvoltage Comparator Using the
Auxiliary Comparator
Adding hysteresis to a comparator creates two trip
points–one for the input voltage rising and one for the
input voltage falling. When the voltage at the
MAX8215/MAX8216 auxiliary comparator’s (noninvert-
ing) input falls, the threshold at which the comparator
Figure 3. Undervoltage/Overvoltage Detector Waveforms and
Formulas
0.1 μ F
8
switches equals the reference voltage connected to the
comparator’s inverting input. However, when the volt-
2 GND
PGND
V DD
14
age at the noninverting input rises, the threshold
equals the reference voltage plus the amount of hys-
teresis voltage built into the part. The trip point is
somewhat more accurate when the hysteresis voltage
+V S
3
+5V
MAX8215
MAX8216
OUT1
13
UNDERVOLTAGE
is not part of the threshold voltage (i.e., when the input
voltage is falling) because the tolerance of the hystere-
sis specification adds to the tolerance of the trip point.
R1
Overvoltage and Undervoltage
Detection Circuits
7
DIN
DOUT
9
OVERVOLTAGE
(
)
Figure 2 shows connection of the auxiliary comparator
as either an undervoltage or overvoltage comparator.
Hysteresis makes this circuit more accurate when the
input voltage is dropping as opposed to rising. Figure
3 illustrates the comparator’s operation. The input volt-
R2
+5V COMPARATOR IS ACTUATED WHEN V S FALLS TO THE
COMPARATOR'S SPECIFIED TRIP LEVEL. THE AUXILIARY
COMPARATOR OUTPUT IS TRIPPED WHEN V S > R1 + R2 VREF
R2
age’s direction determines at which of two trip points
the comparator switches. Thus, the diagram includes
arrows that indicate whether the input voltage is rising
or falling. The formulas are provided for determining
trip-point voltages for specified resistors and for ease
in calculating appropriate resistor ratios for particular
trip points.
Figure 4. Monitoring Supply Powering the MAX8215/MAX8216
with Undervoltage and Overvoltage Comparators
The MAX8215/MAX8216 comparator outputs correctly
display a low level down to 0.8V supply voltage. This is
useful in undervoltage applications where the monitored
power supply is also the supply connected to the V DD
pin. See the section Monitoring the Supply Voltage.
_______________________________________________________________________________________
7
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相关代理商/技术参数 |
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| MAX8215CSD-TG068 | 制造商:Maxim Integrated Products 功能描述:+/- 5V, +/- 12V DEDICATED MICROPROCESSOR VOLT - Bulk |
| MAX8215EJD | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX8215EPD | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX8215EPD+ | 功能描述:监控电路 5/12/15V +/-Dedictd MPU Voltage Monitor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX8215ESD | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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