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參數資料
| 型號： | DS28EA00U+T&R |
| 廠商： | Maxim Integrated |
| 文件頁數： | 1/29頁 |
| 文件大小： | 328K |
| 描述： | IC THERMOMETER 1-WIRE 8-USOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 3,000 |
| 功能： | 溫度計，恒溫計 |
| 傳感器類型： | 內部 |
| 感應溫度： | -40°C ~ 85°C |
| 精確度： | ±0.5°C（最小值） |
| 拓撲： | 寄存器庫，變簽式暫存器 |
| 輸出類型： | 數字 |
| 輸出警報： | 是 |
| 輸出風扇： | 無 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
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General Description
The DS28EA00 is a digital thermometer with 9-bit (0.5癈)
to 12-bit (1/16癈) resolution and alarm function with non-
volatile (NV), user-programmable upper and lower trigger
points. Each DS28EA00 has its own unique 64-bit regis-
tration number that is factory programmed into the chip.
Data is transferred serially through the 1-Wire
?/DIV>
protocol,
which requires only one data line and a ground reference
for communication. The improved 1-Wire front-end with
hysteresis and glitch filter enables the DS28EA00 to per-
form reliably in large 1-Wire networks. Unlike other 1-Wire
thermometers, the DS28EA00 has two additional pins to
implement a sequence-detect function. This feature
allows the user to discover the registration numbers
according to the physical device location in a chain, e.g.,
to measure the temperature in a storage tower at different
height. If the sequence-detect function is not needed,
these pins can be used as general-purpose input or out-
put. The DS28EA00 can derive the power for its operation
directly from the data line ( parasite power ), eliminating
the need for an external power supply.
Applications
Data Communication Equipment
Process Temperature Monitoring
HVAC Systems
Features
f Digital Thermometer Measures Temperatures
from -40癈 to +85癈
f Thermometer Resolution is User Selectable from
9 to 12 Bits
f Unique 1-Wire Interface Requires Only One Port
Pin for Communication
f Each Device Has a Unique 64-Bit, Factory-
Lasered Registration Number
f Multidrop Capability Simplifies Distributed
Temperature-Sensing Applications
f Improved 1-Wire Interface with Hysteresis and
Glitch Filter
f User-Definable NV Alarm Threshold Settings/User
Bytes
f Alarm Search Command to Quickly Identify
Devices Whose Temperature is Outside of
Programmed Limits
f Standard and Overdrive 1-Wire Speed
f Two General-Purpose Programmable IO (PIO) Pins
f Chain Function Sharing the PIO Pins to Detect
Physical Sequence of Devices in Network
f Operating Range: +3.0V to +5.5V, -40?/SPAN>C to +85?/SPAN>C
f Can Be Powered from Data Line
f 8-Pin ?/SPAN>SOP Package
DS28EA00
1-Wire Digital Thermometer with
Sequence Detect and PIO
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com.
Ordering Information
DS28EA00
IO
PIOB
PIOA
GND
V
DD
V
DD
NOTE: SCHEMATIC SHOWS PIO PINS WIRED FOR SEQUENCE-DETECT FUNCTION.
1-Wire
MASTER
#1
DS28EA00
IO
PIOB
PX. Y
MICROCONTROLLER
PIOA
GND
V
DD
#2
DS28EA00
IO
PIOB
PIOA
GND
V
DD
#3
Typical Operating Circuit
Rev 2; 4/09
PART
TEMP RANGE
PIN-PACKAGE
DS28EA00U+
-40癈 to +85癈
8 糞OP
DS28EA00U+T&R
-40癈 to +85癈
8 糞OP
Pin Configuration appears at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
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| DS28EC20+ | 功能描述:電可擦除可編程只讀存儲器 20Kb 1-Wire 電可擦除可編程只讀存儲器 RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數據保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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