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What is ADM1184?

This electronic component, produced by the manufacturer "Analog Devices", performs the same function as "0.8% Accurate Quad Voltage Monitor".


ADM1184 Datasheet PDF - Analog Devices

Part Number ADM1184
Description 0.8% Accurate Quad Voltage Monitor
Manufacturers Analog Devices 
Logo Analog Devices Logo 


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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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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.
Free Datasheet http://www.datasheet4u.com/

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ADM1184 equivalent
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADM1184
GND 1
VIN1 2
VIN2 3
VIN3 4
VIN4 5
10 VCC
ADM1184
TOP VIEW
(Not to Scale)
9 OUT1
8 OUT2
7 OUT3
6 PWRGD
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 GND Chip Ground Pin.
2 VIN1 Noninverting Input of Comparator 1. The voltage on this pin is compared with a 0.6 V reference. Can be used to
monitor a voltage rail via a resistor divider.
3 VIN2 Noninverting Input of Comparator 2. The voltage on this pin is compared with a 0.6 V reference. Can be used to
monitor a voltage rail via a resistor divider.
4 VIN3 Noninverting Input of Comparator 3. The voltage on this pin is compared with a 0.6 V reference. Can be used to
monitor a voltage rail via a resistor divider.
5 VIN4 Noninverting Input of Comparator 4. The voltage on this pin is compared with a 0.6 V reference. Can be used to
monitor a voltage rail via a resistor divider.
6
PWRGD
Active High, Open-Drain Output. When the voltage on each VINx input exceeds 0.6 V, PWRGD is asserted after a
190 ms delay. Once PWRGD has been asserted, if the voltage monitored by VIN1, VIN2, VIN3, or VIN4 falls below 0.6 V,
the PWRGD output is deasserted immediately.
7
OUT3
Active High, Open-Drain Output. When the voltage on VIN3 exceeds 0.6 V, OUT3 is asserted. OUT3 remains asserted
until the voltage monitored by VIN3 falls below 0.6 V, and then it is driven low.
8
OUT2
Active High, Open-Drain Output. When the voltage on VIN2 exceeds 0.6 V, OUT2 is asserted. OUT2 remains asserted
until the voltage monitored by VIN2 falls below 0.6 V, and then it is driven low.
9
OUT1
Active High, Open-Drain Output. When the voltage on VIN1 exceeds 0.6 V, OUT1 is asserted. OUT1 remains asserted
until the voltage monitored by VIN1 falls below 0.6 V, and then it is driven low.
10 VCC
Positive Supply Input Pin. The operating supply voltage range is 2.7 V to 5.5 V.
Rev. 0 | Page 5 of 12
Free Datasheet http://www.datasheet4u.com/


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