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| 型号： | EVAL-ADM2914EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADM2914 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电源监控器/跟踪器/序列发生器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADM2914 |
| 主要属性： | 电压检测器和监控器 |
| 次要属性： | 开漏极输出 |
| 已供物品： | 板 |
Quad UV/OV Positive/Negative
Voltage Supervisor
Data Sheet
FEATURES
ADM2914
FUNCTIONAL BLOCK DIAGRAM
Quad UV/OV positive/negative supervisor
Supervises up to 2 negative rails
Adjustable UV and OV input thresholds
High threshold accuracy over temperature: ±1.5%
1 V buffered reference output
Open-drain UV and OV reset outputs
Adjustable reset timeout with disable option
Outputs guaranteed down to V CC of 1 V
Glitch immunity
62 μA supply current
16-lead QSOP package
APPLICATIONS
Server supply monitoring
VH1
VL1
VH2
VL2
VH3
ADM2914
500mV
500mV
500mV
V CC
TIMER
TIMER
OUTPUT
LOGIC
UV
FPGA/DSP core and I/O voltage monitoring
Telecommunications equipment
Medical equipment
VL3
VH4
500mV
MUX
LOGIC
REF
OV
LATCH/DIS
REF
VL4
SEL
GND
Figure 1.
GENERAL DESCRIPTION
The ADM2914 is a quad voltage supervisory IC ideally suited
for monitoring multiple rails in a wide range of applications.
Each monitored rail has two dedicated input pins, VHx and VLx,
which allows each rail to be monitored for both overvoltage
(OV) and undervoltage (UV) conditions. A common active low
undervoltage (UV) and overvoltage (OV) pin is shared by each
of the monitored voltage rails.
The ADM2914 includes a 1 V buffered reference output, REF,
that acts as an offset when monitoring a negative voltage. The
three-state SEL pin determines the polarity of the third and
fourth inputs, that is, it configures the device to monitor
positive or negative supplies.
The device incorporates an internal shunt regulator that enables
the device to be used in higher voltage systems. This feature
requires a resistor to be placed between the main supply rail and
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
the V CC pin to limit the current flow into the V CC pin to no
greater than 10 mA. The ADM2914 uses the internal shunt
regulator to regulate V CC if the supply line exceeds the absolute
maximum ratings.
The ADM2914 is available in two models. The ADM2914-1
offers a latching overvoltage output that can be cleared by
toggling the LATCH input pin. The ADM2914-2 has a disable
pin that can override and disable both the OV and UV output
signals.
The ADM2914 is available in a 16-lead QSOP package. The
device operates over the extended temperature range of ?40°C
to +125°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ?2009–2013 Analog Devices, Inc. All rights reserved.
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