ADM1087 Analog Devices, ADM1087 Datasheet - Page 5

• Manufacturer Part Number: ADM1087
• Description: Voltage Sequencer with Active Low, Open-Drain Enable Output
• Manufacturer: Analog Devices

Specifications of ADM1087

• # Supplies Monitored: 1
• Volt Monitoring Accuracy: 7%
• # Output Drivers: 1
• Fet Drive/enable Output: Enable
• Sequencing: Up
• Package: 6 ld SC70

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
Mnemonic
ENIN, ENIN
GND
V
ENOUT, ENOUT
CEXT
V
IN
CC
Description
Enable Input. Controls the status of the enable output. Active high for ADM1085/ADM1086. Active low for
ADM1087/ADM1088.
Ground.
Input for the Monitored Voltage Signal. Can be biased via a voltage divider resistor network to customize the
effective input threshold. Can precisely monitor an analog power supply output signal and detect when it has
powered up. The voltage applied at this pin is compared with a 0.6 V on-chip reference. With this reference,
digital signals with various logic level thresholds can also be detected.
Enable Output. Asserted when the voltage at V
that the enable input is asserted. Active high for the ADM1085/ADM1086. Active low for the
ADM1087/ADM1088.
External Capacitor Pin. The capacitance on this pin determines the time delay on the enable output. The delay
is seen only when the voltage at V
Power Supply.
ENIN/ENIN
GND
V
IN
Figure 2. Pin Configuration
1
2
3
(Not to Scale)
Rev. A | Page 5 of 16
ADM1085/
ADM1086/
ADM1087/
ADM1088
TOP VIEW
IN
rises past V
6
5
4
ADM1085/ADM1086/ADM1087/ADM1088
IN
V
CEXT
ENOUT/ENOUT
TH_RISING
CC
is above V
, and not when it falls below V
TH_RISING
and the time delay has elapsed, provided
TH_FALLING
.