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ADM8710 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADM8710은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 ADM8710 기능
기능 Quad Voltage Microprocessor Supervisory Circuit
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ADM8710 데이터시트, 핀배열, 회로
Data Sheet
Low Voltage, High Accuracy, Quad Voltage
Microprocessor Supervisory Circuit
ADM8710
FEATURES
Accurate monitoring of up to four power supply voltages
2 factory-set threshold options for monitoring 1.8 V and 3.3 V
Adjustable input threshold voltage 0.62 V (±1.5% accuracy)
50 ms typical reset timeout
Open-drain RESET output (10 µA internal pull-up)
Reset output stage: active low, valid to IN1 = 1 V or IN2 = 1 V
Power supply glitch immunity
Specified from −40°C to +85°C
6-lead SOT-23 package
APPLICATIONS
Telecommunications
Microprocessor systems
Desktop and notebook computers
Data storage equipment
Servers/workstations
FUNCTIONAL BLOCK DIAGRAM
IN1
ADM8710
IN2
IN2
RESET
RESET
TIMEOUT
IN3 UVLO
IN4
0.62VREF
Figure 1.
GENERAL DESCRIPTION
The ADM8710 is a low voltage, high accuracy supervisory circuit.
The device monitors up to four system supply voltages.
The ADM8710 incorporates two internally pretrimmed under-
voltage threshold options for monitoring 1.8 V and 3.3 V supply
voltages. It also offers two adjustable inputs with 0.62 V internal
reference, allowing users to program the reset threshold through
external resistor dividers. The combination of pretrimmed and
adjustable inputs gives the ADM8710 the advantage of being
both space saving and flexible.
If a monitored power supply voltage falls below the minimum
voltage threshold, a single active low output asserts, triggering a
system reset. The output is open drain with a weak internal
pull-up to the monitored IN2 supply of typically 10 µA. When
all voltages rise above the selected threshold level, the RESET
signal remains low for the reset timeout period. The ADM8710
output remains valid as long as IN1 or IN2 exceeds 1 V.
Unused monitored inputs should not be allowed to float or to
be grounded. Instead, connect them to a supply voltage greater
than their specified threshold voltages.
The ADM8710 is available in a 6-lead SOT-23 package. The
device operates over the extended temperature range of −40°C
to +85°C.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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
©2012 Analog Devices, Inc. All rights reserved.




ADM8710 pdf, 반도체, 판매, 대치품
Data Sheet
ADM8710
SPECIFICATIONS
VIN2 = 1 V to 5.5 V, TA = −40°C to +85°C, unless otherwise noted. Typical values are VIN2 = 3.0 V to 3.3 V, TA = 25°C.
Table 1.
Parameter
OPERATING VOLTAGE RANGE
VIN2 1
INPUT CURRENT
INx Input Current
THRESHOLD VOLTAGE
Threshold Voltage (VTH)
Adjustable Input Threshold Voltage (VTH)
RESET
Reset Threshold Hysteresis (VHYST)
Reset Threshold Temperature Coefficient (TCVTH)
INX to Reset Delay (tRP)
Reset Timeout Period (tRP)
RESET Output Low (VOL)
RESET Output High (VOH)
RESET Output High Source Current (IOH)
Min Typ Max Units Test Conditions/Comments
1.0
5.5 V
TA = 0°C to 85°C
1.2
5.5 V
TA = −40°C to +85°C
55 115 µA
25 40
0.4
0.2
µA
µA
µA
IN2 = nominal input voltage (3.3 V supplies);
the supply splits into 25 µA for the resistor
divider and 30 µA for other circuits
IN3 = nominal input voltage (1.8 V supplies)
VIN1 = 0 V to 0.85 V
VIN4 = 0 V to 0.85 V
3.010
1.705
0.611
3.07 3.130 V
1.73 1.760 V
0.62 0.629 V
INX decreasing; 3.3 V (−5% supply tolerance)
INX decreasing; 1.8 V (−2% supply tolerance)
INX decreasing
0.3
60
30
35 50
0.8 × VIN2
10
70
0.3
0.4
0.3
%VTH
ppm/°C
µs
ms
V
V
V
V
µA
INX increasing relative to INX decreasing
VIN falling at 10 mV/µs from VTH to VTH − 50 mV
VIN2 = 5 V, ISINK = 2 mA
VIN2 = 2.5 V, ISINK = 1.2 mA
VIN2 = 1.0 , ISINK = 20 µA, TA = 0°C to +85°C
VIN2 ≥ 2.0 V, ISOURCE = 4 µA, RESET deasserted
VIN2 ≥ 2.0 V, RESET deasserted
1 The RESET output is guaranteed to be in the correct state for IN1 or IN2 down to 1 V.
Rev. 0 | Page 3 of 12

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ADM8710 전자부품, 판매, 대치품
ADM8710
TYPICAL PERFORMANCE CHARACTERISTICS
VIN2 = 3.0 V, TA = 25°C, unless otherwise noted.
60
58
56
54
52
50
48
46
44
42
40
–40
VIN2 = 3.3V
VIN2 = 3V
–15 10 35 60
TEMPERATURE (ºC)
Figure 3. IN2 Input Current vs. Temperature
85
Data Sheet
100
90
80
70
60
50
40
30
RESET ASSERTED ABOVE THIS LINE
20
10
0
0 100 200 300 400 500 600 700 800 900 1000
RESET THRESHOLD OVERDRIVE (mV)
Figure 6. Maximum INx Transient Duration vs. Reset Threshold Overdrive
120
100
80
60
40
20
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
IN2 VOLTAGE (V)
Figure 4. IN2 Input Current vs. IN2 Voltage
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
–40
–15 10
35
TEMPERATURE (ºC)
VTH = 1.8V
VIN2 = 3.3V
60 85
Figure 5. Normalized Threshold Error vs. Temperature
100
90
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700 800 900 1000
RESET THRESHOLD OVERDRIVE (mV)
Figure 7. RESET Delay vs. Reset Threshold Overdrive (INx Decreasing)
59.0
58.5
58.0
57.5
57.0
56.5
56.0
55.5
55.0
–40 –15
10
35
60
85
TEMPERATURE (°C)
Figure 8. Normalized Reset Timeout Delay vs. Temperature
Rev. 0 | Page 6 of 12

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부품번호상세설명 및 기능제조사
ADM8710

Quad Voltage Microprocessor Supervisory Circuit

Analog Devices
Analog Devices

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