參數(shù)資料
型號(hào)： MAX1989MUE+
廠(chǎng)商： Maxim Integrated
文件頁(yè)數(shù)： 10/17頁(yè)
文件大?。?/td> 497K
描述： IC TEMP SENSOR REMOTE 16TSSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 96
功能： 溫度計(jì)，恒溫計(jì)
傳感器類(lèi)型： 內(nèi)部和外部
感應(yīng)溫度： -55°C ~ 125°C，外部傳感器
精確度： ±3.5°C 本地（最大），±5°C 遠(yuǎn)程（最大）
拓?fù)洌?/td> ADC，比較器，多路復(fù)用器，寄存器庫(kù)
輸出類(lèi)型： I²C?/SMBus?
輸出警報(bào)： 是
輸出風(fēng)扇： 無(wú)
電源電壓： 3 V ~ 5.5 V
工作溫度： -55°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 16-TSSOP
包裝： 管件
sion cycle is truncated, and the data from that conversion
is not latched into either temperature-reading register. The
previous data is not changed and remains available.
In standby mode, supply current drops to about 3礎(chǔ).
At very low supply voltages (under the power-on-reset
threshold), the supply current is higher due to the
address pin bias currents. It can be as high as 100礎(chǔ),
depending on ADD0 and ADD1 settings.
SMBus Digital Interface
From a software perspective, the MAX1668/MAX1805/
MAX1989 appear as a set of byte-wide registers that
contain temperature data, alarm threshold values, or
control bits. A standard SMBus 2-wire serial interface is
used to read temperature data and write control bits and
alarm threshold data. Each A/D channel within the
devices responds to the same SMBus slave address for
normal reads and writes.
The MAX1668/MAX1805/MAX1989 employ four standard
SMBus protocols: write byte, read byte, send byte, and
receive byte (Figure 3). The shorter receive byte protocol
allows quicker transfers, provided that the correct data
register was previously selected by a read byte instruc-
tion. Use caution with the shorter protocols in multimaster
systems, since a second master could overwrite the com-
mand byte without informing the first master.
The temperature data format is 7 bits plus sign in twos-com-
plement form for each channel, with each data bit represent-
ing 1癈 (Table 2), transmitted MSB first. Measurements are
offset by +0.5癈 to minimize internal rounding errors; for
example, +99.6癈 is reported as +100癈.
Alarm Threshold Registers
Ten (six for MAX1805) registers store alarm threshold
data, with high-temperature (T
HIGH
) and low-tempera-
ture (T
LOW
) registers for each A/D channel. If either
measured temperature equals or exceeds the corre-
sponding alarm threshold value, an ALERT interrupt is
asserted.
The power-on-reset (POR) state of all T
HIGH
registers of
the MAX1668 and MAX1805 is full scale (0111 1111, or
+127癈). The POR state of the channel 1 T
HIGH
register
of the MAX1989 is 0110 1110 or +110癈, while all other
channels are at +127癈. The POR state of all T
LOW
reg-
isters is 1100 1001 or -55癈.
Multichannel Remote/Local
Temperature Sensors
10   ______________________________________________________________________________________
ACK
7 bits
ADDRESS
ACK
WR
8 bits
DATA
ACK
1
P
8 bits
S
COMMAND
Write Byte Format
Read Byte Format
Send Byte Format
Receive Byte Format
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface
Command Byte: selects which
register you are writing to
Data Byte: data goes into the register
set by the command byte (to set
thresholds, configuration masks, and
sampling rate)
ACK
7 bits
ADDRESS
ACK
WR
S
ACK
8 bits
DATA
7 bits
ADDRESS
RD
8 bits
///
P
S
COMMAND
Slave Address: equiva-
lent to chip-select line
Command Byte: selects
which register you are
reading from
Slave Address: repeated
due to change in data-
flow direction
Data Byte: reads from
the register set by the
command byte
ACK
7 bits
ADDRESS
WR
8 bits
COMMAND
ACK
P
S
ACK
7 bits
ADDRESS
RD
8 bits
DATA
///
P
S
Command Byte: sends com-
mand with no data
Data Byte: This command only
works immediately following a
Read Byte. Reads data from the
register commanded by that last
Read Byte; also used for SMBus
Alert Response return address
S = Start condition
Shaded = Slave transmission
P = Stop condition
/// = Not acknowledged
Figure 3. SMBus Protocols
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1989MUE+ 功能描述:板上安裝溫度傳感器 MultiCh Remote Local Sensor RoHS:否 制造商:Omron Electronics 輸出類(lèi)型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線(xiàn)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
MAX1989MUE+T 功能描述:板上安裝溫度傳感器 MultiCh Remote Local Sensor RoHS:否 制造商:Omron Electronics 輸出類(lèi)型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線(xiàn)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
MAX1989MUE-T 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類(lèi)型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線(xiàn)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
MAX198ACAI 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX198ACAI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 100ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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