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參數資料
| 型號： | ADM6710QARJZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Low Voltage, High Accuracy, Quad Voltage UP Supervisory Circuit |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | ROHS COMPLIANT, MO-178AB, SOT-23, 6 PIN |
| 文件頁數： | 6/8頁 |
| 文件大小： | 194K |
| 代理商： | ADM6710QARJZ-REEL7 |
ADM6710
Preliminary Technical Data
THEORY OF OPERATION
The ADM6710 is a compact, low power supervisory circuit
capable of monitoring up to four voltages in multivoltage
applications. If a monitored power supply voltage falls below the
minimum voltage threshold, a single active low output asserts,
triggering a system reset.
The ADM6710 includes several voltage threshold options for
monitoring 5.0 V, 3.3 V, 3.0 V, 2.5 V and 1.8 V supplies. It also
provides up to three adjustable thresholds for monitoring
voltages down to 0.62 V. See the Ordering Guide section for a
list and description of all options available.
The ADM6710 includes precision comparators, an accurate
band gap reference, and a series of internally-trimmed resistor
divider networks to set the factory-fixed reset threshold
options. The resistor networks scale the specified INx reset
voltages to match the internal band gap reference/comparator
voltage.
Adjustable threshold options bypass the internal resistor
networks and connect directly to one of the comparator inputs.
External resistor divider networks must be used to scale
voltages down for monitoring at the adjustable inputs. The
ADM6710Q provides a separate unmonitored power supply
input (V
CC
) and three adjustable voltage inputs.
The internal comparators each typically have a hysteresis of
0.3% with respect to its reset threshold. This built-in hysteresis
improves the device’s immunity to ambient noise without
noticeably reducing the threshold accuracy. The ADM6710 is
unaffected by short input transients.
Rev. PrB | Page 6 of 8
MONITORED
SUPPLIES
MICROPROCESSOR
0
ADM6710
IN
1
IN
2
IN
3
IN
4
GND
RESET
Figure 3. Typical Applications Circuit
INPUT CONFIGURATION
The ADM6710 provides numerous monitor choices with
adjustable reset thresholds. Typically, the threshold voltage at
each adjustable INx input is 0.62 V. To monitor a voltage greater
than 0.62 V, connect a resistor divider network to the circuit as
depicted in Figure 4, where
+
R
=
2
2
1
62
.
R
R
V
V
INTH
R1
R2
V
INTH
V
REF
= 0.62V
0
Figure 4. Setting the Adjustable Monitor
The ADM6710Q contains an internal voltage clamp at each of
the adjustable voltage inputs. Input voltages greater than 1.5 V
induce a higher input current.
The ADM6710 is normally powered from the monitored IN
2
, or
V
CC
in the case of the ADM6710Q. Monitored inputs are
resistant to short power supply glitches. To increase noise
immunity in noisy applications, place a 0.1 μF capacitor
between the IN
2
input and ground. Adding capacitance to IN
1
,
IN
3
, and IN
4
also improves noise immunity.
Do not allow unused monitor inputs to float or to be grounded.
Connect these inputs to a supply voltage greater than their
specified threshold voltages. In the case of unused INx
adjustable inputs, limit the bias current by connecting a 1 MΩ
series resistor between the unused input and IN
2
(or V
CC
with
the ADM6710Q).
RESET OUTPUT CONFIGURATION
The ADM6710 has a reset timeout period of 200 ms (typical).
The output is open drain with a weak internal pull-up to the
monitored IN
2
or V
CC
supply, typically 10 uA.
In many applications that interface with other logic devices,
there is no requirement for an external pull-up resistor. An
external pull-up resistor to any voltage, ranging from 0 V to
5.5 V, can overdrive the internal pull-up when interfacing to
different logic supply voltages (see Figure 5). Reverse current
flow from the external pull-up voltage to IN
2
is prevented by
the internal circuitry.
ADM6710
RESET
0
RESET
V
CC
5V
100k
IN
2
=3.3V
Figure 5. Interface with a Different Logic Supply Voltage
The ADM6710Q is powered by V
CC
, which is not a monitored
voltage. All other ADM6710 options are powered by IN
2
, which
is a monitored voltage. If a supply voltage drops below its
associated threshold, the reset output asserts low and remains
low while either IN
1
or IN
2
remains above 1.0 V.
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| ADM6711LAKS-REEL | 功能描述:IC SUPERVISOR P/P 4.63V SC70-4 RoHS:否 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:3,000 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:推挽式，圖騰柱 復位:高有效 復位超時:最小為 100 ms 電壓 - 閥值:3.06V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:SC-70，SOT-323 供應商設備封裝:SC-70-3 包裝:帶卷 (TR) 其它名稱:ADM1817-5AKSREEL7 |
| adm6711laks-reel7 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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