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| 型号： | EVAL-ADM1087EB |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADM1087 |
| 标准包装： | 1 |
| 系列： | Simple Sequencers® |
| 主要目的： | 电源管理，电源监控器/跟踪器/序列发生器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADM1087 |
| 主要属性： | 2 个单通道序列发生器，基于时间的时序 |
| 已供物品： | 板，电池 |
ADM1087 Simple Sequencer?
Evaluation Kit
EVAL-ADM1087EB
FEATURES
Sequencing of 3.3 V, 2.5 V, and 1.8 V power supplies
Red, yellow, and green LEDs indicate power supply status,
giving visual demonstration of power-up sequence
Dedicated power and enable/disable switches
On-board test points allow examination of ADM1087 and
regulator I/O signals
Sockets allow external through-hole capacitors to be
connected manually for customizable time delays
GENERAL DESCRIPTION
The EVAL-ADM1087EB Evaluation Kit demonstrates how the
ADM1087 Simple Sequencer? can be used to provide time-
based sequencing in multiple-supply systems. A pair of
ADM1087s are cascaded with three ADP3334 LDO regulators,
which supply voltage levels of 3.3 V, 2.5 V, and 1.8 V. In this
configuration, the 3.3 V supply switches on as soon as power
from a 9 V battery is applied, and the 2.5 V and 1.8 V regulators
are enabled by delayed detection signals from the outputs of the
previous regulators in the circuit.
EVALUATION KIT CONTENTS
ADM1087 evaluation board
9 V battery
2 100 nF ceramic capacitors
4 samples (1 presoldered to on-board adapter)
Red, yellow, and green LEDs provide a visual indication of the
status of each of the three supplies, and two pairs of wire wrap
pins allow for experimentation with different capacitor values
for different enable time delays. A dedicated enable/disable
switch connects directly to the ENIN ADM1087 inputs to
demonstrate how a supply can be switched off by driving this
pin low with an external logic signal.
EVALUATION BOARD BLOCK DIAGRAM
ON/OFF
IN
RED
IN
YELLOW
IN
GREEN
9V
SD
ADP3334
OUT
3.3V
SD
ADP3334
OUT
2.5V
SD
ADP3334
OUT
1.8V
3.3V
V CC
3.3V
V CC
V IN
ADM1087
ENOUT
V IN
ADM1087
ENOUT
ENIN CEXT
9V
ENABLE/
DISABLE
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. Trademarks and
Figure 1.
ENIN CEXT
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
registered trademarks are the property of their respective owners.
Fax: 781.326.8703
? 2004 Analog Devices, Inc. All rights reserved.
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