參數(shù)資料
型號： DS2422S
英文描述： 1-Wire Temperature/Datalogger with 8kB Datalog Memory
中文描述： 1 - Wire溫度/數(shù)據(jù)記錄器與8kB的數(shù)據(jù)記錄存儲器
文件頁數(shù)： 14/48頁
文件大小： 444K
代理商： DS2422S
DS2422
14 of 48
Temperature Alarm Threshold Examples
(°C)
TALM
decimal
85h
3Eh
hex
25.5
-10.0
133
62
SERIAL DATA INPUT
In addition to temperature, the DS2422 can log 8-bit or 16-bit digital information that it receives through its serial
interface. This interface is designed to directly connect to ADCs such as the MAX1086 or other circuits that use the
same interface timing. The general timing of the serial interface is shown in Figure 9. All timing is derived from an
on-chip ring oscillator, which generates the CLK signal. The CNVST signal is intended to start an
analog-to-digital
conversion. After the conversion is completed, the SCLK signal becomes active and on its rising edge clocks the
digital value into the DS2422. The PUMP_ONZ signal can activate a MAX619 charge pump to convert the 3V
battery voltage of the DS2422 into 5V, for example, to power additional circuitry.
Figure 9A. Serial Interface Timing
t
RING
PUMP_ONZ
CNVST
SCLK
SDATA
CLK
B15 B14 B13 B12 b4 B3 B2 B1 B0
t
SP
t
CPW
t
SCH
t
SCP
Figure 9B. Serial Interface Setup and Hold Timing
t
SDS
t
SDH
SCLK
SDATA
Data
Valid
The serial interface becomes active whenever the DS2422 executes a Forced Conversion command (see
Memory/Control Function Commands
) or during a mission, if the device is set up to log data from its serial
interface. Regardless of its setup, the DS2422 always reads 16 bits from its serial input.
The 16-bit result of the
latest serial reading is found at address 020Eh (low byte) and 020Fh (high byte).
The first bit read through the
serial interface is always found as B15 at address 020Fh. If an ADC generates less than 16 bits, the internal weak
pulldown of the SDATA pin makes the missing bits read zero.
Latest Serial Data Reading Result Register Bitmap
ADDR
020Eh
020Fh
b7
B7
B15
b6
B6
B14
b5
B5
B13
b4
B4
B12
b3
B3
B11
b2
B2
B10
b1
B1
B9
b0
B0
B8
LOW
HIGH
During a mission, if data logging from the serial input is enabled, the HIGH byte (B15 to B8) is always recorded.
The LOW byte (B7 to B0) is only recorded if the DS2422 is set up for 16-bit logging of serial input data.
The algorithm to convert the digital reading from the serial interface into a physical unit depends on the circuit that
provides the data to the DS2422. This algorithm needs to be reversed when calculating values for the alarm
相關(guān)PDF資料
PDF描述
DS2482-800 Eight-Channel 1-Wire Master
DS2482-100 Single-Channel 1-Wire Master
DS2482S-100 Single-Channel 1-Wire Master
DS2482S-800 Eight-Channel 1-Wire Master
DS2502-E48 48-Bit Node Address Chip
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2422S+ 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
DS2422X 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
DS2423 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:4kbit 1-Wire RAM with Counter
DS2423D/T&R 制造商:Maxim Integrated Products 功能描述:IC SRAM 4KBIT 6FLIPCHIP
DS2423D/T&R 功能描述:IC SRAM 4KBIT 6FCHIP RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-DFN（2x3） 包裝:管件 產(chǎn)品目錄頁面:1445 (CN2011-ZH PDF)
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