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參數(shù)資料
| 型號： | ADT14GS |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:61; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Socket; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:25-61 |
| 中文描述： | 四設(shè)定，可編程溫度監(jiān)視器和控制器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 338K |
| 代理商： | ADT14GS |
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADT14
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
Analog Devices, Inc., 1997
Quad Setpoint, Programmable
Temperature Monitor and Controller
FUNCTIONAL BLOCK DIAGRAM
VOLTAGE
REFAND
SENSOR
CURRENT
MIRROR
WINDOW
COMPARATORS
HYSTERESIS
VOLTAGE
TEMPERATURE
OUTPUT
HYSTERESIS
SETPOINT
OUTPUT 1
SETPOINT
OUTPUT 2
SETPOINT
OUTPUT 3
SETPOINT
OUTPUT 4
VPTAT
2.5V
V
REF
SET 1
SET 2
SET 3
SET 4
GND
V+
ADT14
PIN CONFIGURATIONS
DIP & SO
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
ADT14
NC = NO CONNECT
OUTPUT 1
V+
2.5V REFERENCE
SETPOINT 4
OUTPUT 4
SETPOINT 1
NC
NC
SETPOINT 3
HYSTERESIS
NC
GROUND
VPTAT
SETPOINT 2
OUTPUT 2
OUTPUT 3
FEATURES
Four Programmable Temperature Setpoints
Programmable Thermal Hysteresis
Accuracy
6
3
8
C Typ from –40
8
C to +125
8
C
Temperature Output Scale Factor = 5 mV/K
Resistor Programmable Temperature Setpoints
5 mA Open-Collector Setpoint Outputs
Internal 2.5 V Reference
600
m
A Max Quiescent Current at +5 V
APPLICATIONS
Power Supply Monitor and Control System
Multiple Fan Controller System
Workstation Thermal Management System
GENERAL DESCRIPTION
The ADT14 is a temperature sensor and controller that generates
an output voltage proportional to temperature and provides four
temperature trip points. The four trip points, or temperature
setpoints, and their hysteresis are determined by voltage levels set
by the user. An on-chip voltage reference provides an easy method
for setting the temperature trip points.
The ADT14 consists of a bandgap voltage reference combined
with four matched comparators. The reference provides both a
temperature-stable 2.5 V output, and a voltage proportional to
absolute temperature (VPTAT) which has a precise temperature
coefficient of 5 mV/K = 5 mV/(
°
C +273.15). The VPTAT out-
put is nominally 1.49 V at +25
°
C. The comparators determine
whether the VPTAT output is above the voltages set up by
external resistive dividers (temperature trip points) and generate
an open-collector output signal when one of their respective
thresholds has been exceeded.
Hysteresis is programmed by a user-selected voltage at the hys-
teresis pin. This voltage adjusts the hysteresis current which is
used to generate a hysteresis offset voltage. The comparator’s
noninverting inputs are connected in parallel, which guarantees
that there is no hysteresis overlap and eliminates erratic transi-
tions between adjacent trip zones.
Using a proprietary thin-film resistor process in conjunction
with production laser trimming, a temperature accuracy of
±
3
°
C
at 25
°
C is guaranteed. The open-collector outputs are capable
of sinking 5 mA, and provide TTL/CMOS logic compatibility
with an external pull-up resistor. Operating from a single 5 V
supply, the quiescent current is 600
μ
A max.
The ADT14 is available in the 16-lead epoxy DIP and SO
(small outline) packages.
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