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PDF AD5100 Data sheet ( Hoja de datos )
| Número de pieza | AD5100 | |
| Descripción | System-Management IC | |
| Fabricantes | Analog Devices | |
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Preliminary Technical Data
System-Management IC with Programmable Quad
Voltage Monitoring and Supervisory Functions
AD5100
FEATURES
• Two Device-Enabling Outputs with Six Programmable
Monitoring Inputs (Table 1)
o Two 30V Monitoring Inputs with Shutdown Control of
External Devices:
Programmable Over-voltage, Under-voltage,
Turn-on, Turn-off Thresholds, and Shutdown
timings
Shutdown Warning with Fault Detection
o Two 5V Monitoring Inputs with Reset Control of External
Devices:
Programmable Reset Thresholds and Hold Time
o Two Supervisory Functions:
Watchdog Reset Controller with Programmable
Timeout and Selectable Floating Input
Manual Reset Control for External Devices
• Digital Interface and Programmability:
o I2C® Compatible Interface
o OTP1 for Permanent Threshold and Timing Settings
o OTP Overwritten Capable for Dynamic Adjustments
o Power Up by Edge Triggered Signal
o Power Down by I2C Software
• Operating Range:
o Supply Voltage 6.0V to 30V
o Temp Range -40oC to +125oC
o Low Shutdown Current: 10μA
• High-Voltage-Input Anti-migration Shielding Pinouts
APPLICATIONS
• Automotive Systems
• Network Equipment
• Computers, Controllers, and Embedded Systems
GENERAL DESCRIPTION
The AD5100 is a programmable system-management IC that
combines 4-channel of voltage monitoring and a watchdog
supervision that can be used to shutdown external supplies,
reset processors, or disable any other system electronics when
the systems malfunction. The AD5100 can also be used to
protect system under faulty condition of improper devices
power up sequencing. The AD5100 can monitor two 30V inputs
with shutdown and reset controls, one 2.5V-5.0V and one 0.9V-
3.3V monitoring inputs with reset control, a robust watchdog
reset controller. Most monitoring input thresholds and timing
settings can be programmed on the fly or permanently set in
the factory with the OTP feature.
The AD5100 is versatile for system-monitoring applications
where critical μP, DSP, and embedded systems operate under
harsh conditions such as automotive, industrial, or
communications network environments.
The AD5100 is available in compact QSOP-16 and can operate
in an extended automotive temperature range from -40oC to
+125oC.
1.One Time Programmable EPROM – Unlimited Adjustment Before OTP Execution.
2 With Programmable Threshold and Programmable Delay.
Table 1. AD5100 General Inputs and Output Information
Input
Monitoring
Range2
Shutdown
Control
Reset
Cont
rol
V1MON
V2MON
V3MON
V4MON
WDI
MR
6 – 30 V
3 – 30 V
2.5 – 5.0 V
0.9 – 3.3 V
0–5V
0–5V
√
√
√
√
√
√
√
√
√
Fault
Dete
ctio
n
√
√
√
√
Rev. PrJ
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
©2006 Analog Devices, Inc. All rights reserved.
1 page  
Preliminary Technical Data
AD5100
Parameter
Symbol
Conditions
Min Typ1 Max Unit
Sleep Mode Supply Current
ISLEEP_V1MON
V2MON = 0 V
10 μA
Active Mode Supply Current
IPOWER_V1MON
V2MON = 12 V
3 mA
V2MON Edge Triggered Mode
Selected
3 mA
Device Power On Threshold
V2MON,IH
2.2 V
V2MON,IL
0.4 V
Device Power Up V2MON Minimum
Pulse Width (Figure 14)
Device Power Down Delay
tV2MON_PW
V2MON < 0.4V (Normal Mode)
4
2
ms
s
I2C Initiated Power Down
10 μs
OTP Supply Voltage6
OTP Supply Current
OTP Settling Time7
VOTP
IVOTP
tS_OTP
For OTP only
For OTP only
6 6.5
200
12
V
mA
ms
TIMING CHARACTERISTICS 8
Parameter Adjustment Time
tS1
1 μs
I2C Interface Timing
Characteristics
SCL Clock Frequency
fSCL
400 KHz
tBUF Bus Free Time between Start
and Stop
t1
1.3 μs
tHD;STA Hold Time after (Repeated)
START condition. After this period,
the first clock is generated
t2
0.6 μs
tLOW Low Period of SCL Clock
t3
1.3 μs
tHIGH High Period of SCL Clock
t4
0.6 50 μs
tSU;STA Setup Time for Start
Condition
t5
0.6 μs
tHD;DAT Data Hold Time
t6
0.9 μs
tSU;DAT Data Setup Time
t7
0.1 μs
tF Fall Time of Both SDA and SCL
Signals
t8
0.3 μs
tR Rise Time of Both SDA and SCL
Signals
t9
0.3 μs
tSU;STO Setup Time for Stop
Condition
t10
0.6 μs
Notes:
1. Represent typical values at 25°C, V1MON = 12 V, and V2MON = 12 V.
2. Does not apply if V2MON is a digital signal.
3. The RESET short-circuit current is the maximum pullup current when RESET is driven low by a μP bidirectional reset pin.
4. It is typical for the SCL and SDA have resistors to be pulled up to V3MON. However, care must be taken to ensure that the minimum VIH is met when the SCL and SDA are driven directly from a low voltage
logic controller without pull-up resistors.
5. Initial V2MON ON minimum remains as 2.2V but the -0.3V to 30V specifications apply afterwards.
6. VOTP can be furnished by Factory 6V power supply, rather than on-board power supply, when performing factory programming. A 10uF tantalum capacitor is required on VOTP during operation regardless
of whether the OTP fuses are programmed.
7. The OTP settling time occurs only once if OTP function is used.
8. Guaranteed by design and not subject to production test.
t8 t6 t9
t2
SCL
t2 t3
SDA
t8
t1
PS
Figure 2. Digital Interface Timing Diagram
t9
t4
t7 t5
S
t10
P
Rev. PrJ | Page 5 of 32
5 Page 
Preliminary Technical Data
AD5100
MR 0 – 5 V
√
Monitoring Inputs
V1MON
V1MON is a high-voltage monitoring input that controls the
SHDN and RESET functions of the external devices. In
addition, it also provides a shutdown warning to the system.
V1MON monitors inputs from 6V to 30V. It has a 16-level
programmable over-voltage, under-voltage (OV,UV)
shutdown threshold with an 8-step 0.05ms-200ms shutdown
hold time and 0.05ms-1200ms shutdown delay. The
shutdown hold time means that the shutdown of the external
device is held until the programmed-time is reached. On the
other hand, the shutdown delay means that shuting down the
external device is delayed until the programmed-time is
reached.
The OV threshold chosen must be greater than the UV
threshold. When the shutdown is triggered either because the
input has reached OV or UV threshold, such fault condition
will be temporarily recorded in the Fault Detection Register.
The SHDNWARN output will transition low for signaling
before shutdown occurs. The occurance of Shutdown is
V1MON
tGLITCH
Highest Prority on
Other Inputs
Leave Floating
depending on how long the shutdown programmed-delay is
set relative to the SHDNWARN propagation delay, this
feature attempts to allow the system to finish any critical
house keeping tasks before shuting down the external device.
The V1MON, shutdown, and shutdown warning timing
diagrams are shown in Figure 5. The ranges of OV and UV
Thresholds are shown in Table 5a and the programming
codes of the selected-thresholds are found in Table 5b. The
defaulted OV threshold is 18.00V and UV threshold is 8.43V.
Simarily, the ranges of shutdown hold and delay times are
shown in Table 6a and the programming codes of the
selected-timings are found in Table 6b. The defaulted
shutdown hold time is 200ms delay time is 1200ms.
The voltage at V1MON provides the power for the AD5100 but
valid signal at V2MON must be present before the internal VREG
starts operation. Details will be explained in the power
section.
V1MON_OV *
V1MON_UV *
V2MON
SHDN
tGLITCH
t2SD_HOLD * t1SD_DELAY *
t1SD_HOLD * t1SD_DELAY * t1SD_HOLD *
tMIN#
t2SD_DELAY *
t2SD_HOLD *
tFD_DELAY
tFD_DELAY
tFD_DELAY
V2MON_ON *
V2MON_OFF *
t2SD_DELAY *
tFD_DELAY
SHDNWARN
* = Programmable
#: The duration of the tMIN must be shorter than tVREG_Off_Delay or else the AD5100 will be powered off
Figure 5. V1MON and V2MON Shutdown Timing Diagrams (Note RESET follows SHDN ).
The V1MON pin is monitored by two comparators, one for
indicating an OV condition has occurred. Due to hysteresis,
over-voltage, and one for under-voltage detection. Both are
the V1MON input must be brought below the programmed OV
designed with 1.5% hysteresis.
threshold by 1.5% before the comparator will be in-active,
When the V1MON n input goes above the programmed OV
indicating the OV condition has gone away, see Figure 6.
threshold, the comparator will become active immediately,
Rev. PrJ | Page 11 of 32
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AD5100.PDF ] | |
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