- 您现在的位置：买卖IC网 > PDF目录18946 > DS18S20Z/T&R (Maxim Integrated)IC THERM MICROLAN HI-PREC 8-SOIC PDF资料下载
参数资料
| 型号： | DS18S20Z/T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 3/23页 |
| 文件大小： | 0K |
| 描述： | IC THERM MICROLAN HI-PREC 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 感应温度： | -55°C ~ 125°C |
| 输出类型： | 数字 |
| 电源电压： | 3 V ~ 5.5 V |
| 精确度： | ±0.5°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
DS18S20
Figure 1. DS18S20 Block Diagram
V PU
4.7k
PARASITE POWER
CIRCUIT
MEMORY CONTROL
LOGIC
DS18S20
DQ
TEMPERATURE SENSOR
GND
C PP
INTERNAL V DD
64-BIT ROM
AND
1-Wire PORT
SCRATCHPAD
ALARM HIGH TRIGGER (T H )
REGISTER (EEPROM)
V DD
POWER-
SUPPLY
SENSE
ALARM LOW TRIGGER (T L )
REGISTER (EEPROM)
8-BIT CRC GENERATOR
OPERATION—MEASURING TEMPERATURE
The core functionality of the DS18S20 is its direct-to-digital temperature sensor. The temperature sensor
output has 9-bit resolution, which corresponds to 0.5 ° C steps. The DS18S20 powers-up in a low-power
idle state; to initiate a temperature measurement and A-to-D conversion, the master must issue a Convert
T [44h] command. Following the conversion, the resulting thermal data is stored in the 2-byte
temperature register in the scratchpad memory and the DS18S20 returns to its idle state. If the DS18S20
is powered by an external supply, the master can issue “read-time slots” (see the 1-Wire Bus System
section) after the Convert T command and the DS18S20 will respond by transmitting 0 while the
temperature conversion is in progress and 1 when the conversion is done. If the DS18S20 is powered with
parasite power, this notification technique cannot be used since the bus must be pulled high by a strong
pullup during the entire temperature conversion. The bus requirements for parasite power are explained in
detail in the Powering the DS18S20 section.
The DS18S20 output data is calibrated in degrees centigrade; for Fahrenheit applications, a lookup table
or conversion routine must be used. The temperature data is stored as a 16-bit sign-extended two’s
complement number in the temperature register (see Figure 2). The sign bits (S) indicate if the
temperature is positive or negative: for positive numbers S = 0 and for negative numbers S = 1. Table 1
gives examples of digital output data and the corresponding temperature reading.
Resolutions greater than 9 bits can be calculated using the data from the temperature, COUNT REMAIN
and COUNT PER °C registers in the scratchpad. Note that the COUNT PER °C register is hard-wired to
16 (10h). After reading the scratchpad, the TEMP_READ value is obtained by truncating the 0.5 ° C bit
(bit 0) from the temperature data (see Figure 2). The extended resolution temperature can then be
calculated using the following equation:
TEMPERATUR E = TEMP _ READ ? 0 . 25 +
COUNT _ PER _ C ? COUNT _ REMAIN
COUNT _ PER _ C
3 of 23
相关PDF资料 |
PDF描述 |
|---|---|
| DS18S20/T&R | IC THERM MICROLAN HI PREC TO-92 |
| 507-4957-3733-500F | LED PANEL IND 5V YELLOW |
| 507-4957-3333-500F | LED PANEL IND 5V 20MA AMBER |
| DS1822Z | IC THERMOMETER ECONO DIG 8-SOIC |
| 559-6401-001F | LED SNAP-IN PANEL IND WHT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS18VN6LPQ | 制造商:Banner Engineering 功能描述:SENSOR, PHOTOELECTRIC, DS18VN6LPQ PICO QP NPN POL RET |
| DS18VP6FF50Q8 | 制造商:Banner Engineering 功能描述:DS18VP6FF50Q8 EURO QD PNP 50MM FIXED FIELD |
| DS18VP6LP-29537 | 制造商:Banner Engineering 功能描述:DS18 Series: Polarized Retro, Range: 3.5 m, Input: 10-30V dc, Output: Complement |
| DS18VP6LPQ8 | 制造商:Banner Engineering 功能描述:SENSOR, PHOTOELECTRIC, DS18VP6LPQ8 EURO QD PNP POL RETRO |
| DS1904 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Real-Time Clock/calendar in binary format RTC iButton Over 10 years of operation |
发布紧急采购，3分钟左右您将得到回复。