ADM1184 데이터 시트보기 (PDF) - Analog Devices
부품명
상세내역
제조사
ADM1184 Datasheet PDF : 12 Pages
| |||
0.8% Accurate Quad Voltage Monitor
ADM1184
FEATURES
Powered from 2.7 V to 5.5 V on the VCC pin
Monitors 4 supplies via 0.8% accurate comparators
4 inputs can be programmed to monitor different voltage
levels with external resistor dividers
3 open-drain enable outputs (OUT1, OUT2, and OUT3)
Open-drain power-good output (PWRGD)
Internal 190 ms delay associated with assertion of PWRGD
10-lead MSOP
APPLICATIONS
Monitor and alarm functions
Telecommunications
Microprocessor systems
PC/servers
FUNCTIONAL BLOCK DIAGRAM
VCC
VIN1
VIN2
VIN3
VIN4
ADM1184
REF = 0.6V
REF = 0.6V
REF = 0.6V
REF = 0.6V
POWER AND
REFERENCE
REF = 0.6V
GENERATOR
INTERNAL
LOGIC
OUT1
OUT2
OUT3
PWRGD
GND
GENERAL DESCRIPTION
The ADM1184 is an integrated, 4-channel voltage-monitoring
device. A 2.7 V to 5.5 V power supply is required on the VCC pin
to power the device.
Four precision comparators monitor four voltage rails.
Each comparator has a 0.6 V reference with a worst-case
accuracy of 0.8%. Resistor networks that are external to the
VIN1, VIN2, VIN3, and VIN4 pins set the trip points for
the monitored supply rails.
The ADM1184 has four open-drain outputs. OUT1 to OUT3
can be used to enable power supplies, and PWRGD is a
common power-good output.
Figure 1.
OUT1 to OUT3 are dependent on their associated VINx input
(that is, VIN1, VIN2, or VIN3). If a supply monitored by VINx
drops below its programmed threshold, the associated OUTx pin
and PWRGD are disabled.
PWRGD is a common power-good output indicating the status
of all monitored supplies. There is an internal 190 ms (typical)
delay associated with the assertion of the PWRGD output. If
VIN1, VIN2, VIN3, or VIN4 drops below its programmed
threshold, PWRGD is deasserted immediately.
The ADM1184 is available in a 10-lead mini small outline
package (MSOP).
Rev. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
Share Link: 