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參數(shù)資料
| 型號(hào)： | MAX6690MEE+ |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 149K |
| 描述： | IC TEMP SENSOR SMBUS 16-QSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 功能： | 溫度計(jì)，恒溫計(jì) |
| 傳感器類型： | 內(nèi)部和外部 |
| 感應(yīng)溫度： | -55°C ~ 125°C，外部傳感器 |
| 精確度： | ±5°C（最小值） |
| 拓?fù)洌?/td> | ADC，多路復(fù)用器，寄存器庫 |
| 輸出類型： | I²C?/SMBus? |
| 輸出警報(bào)： | 是 |
| 輸出風(fēng)扇： | 無 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-QSOP |
| 包裝： | 管件 |
2癈 Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
12 ______________________________________________________________________________________
Alert Interrupts
The ALERT interrupt output signal is latched and can
only be cleared by either reading the status register or
by receiving an Alert Response address, if the fault
condition has ceased. Interrupts are generated in
response to T
HIGH
and T
LOW
comparisons and when
the remote diode is disconnected (for continuity fault
detection). The interrupt does not halt automatic con-
versions; new temperature data continues to be avail-
able over the SMBus interface after ALERT is asserted.
The interrupt output pin is open drain so that multiple
devices can share a common interrupt line. The inter-
rupt rate can never exceed the conversion rate.
The MAX6690 responds to the SMBus Alert Response
address, an interrupt pointer return-address feature
(see Alert Response Address section). Prior to taking
corrective action, always check to ensure that an inter-
rupt is valid by reading the current temperature.
Alert Response Address
The SMBus Alert Response interrupt pointer provides
quick fault identification for simple slave devices that
lack the complex, expensive logic needed to be a bus
master. Upon receiving an ALERT interrupt signal, the
host master can broadcast a Receive Byte transmission
to the Alert Response slave address (0001 100). Then
any slave device that generated an interrupt attempts
to identify itself by putting its own address on the bus
(Table 4).
The Alert Response can activate several different slave
devices simultaneously, similar to the I
2
C General Call.
If more than one slave attempts to respond, bus arbitra-
tion rules apply, and the device with the lower address
code wins. The losing device does not generate an
acknowledge and continues to hold the ALERT line low
until cleared. (The conditions for clearing an ALERT
vary depending on the type of slave device. Successful
reading of the alert response address clears the inter-
rupt latch provided that the condition that caused the
ALERT has already ceased. The ALERT is cleared after
the slave address has been returned to the host.)
Command Byte Functions
The 8-bit command byte register (Table 5) is the master
index that points to the various other registers within the
MAX6690. The registers POR state is 0000 0000, so
that a Receive Byte transmission (a protocol that lacks
the command byte) that occurs immediately after POR
returns the current local temperature data. The one-
shot command immediately forces a new conversion
cycle to begin. If the one-shot command is received
when the MAX6690 is in software standby mode
(RUN/STOP bit = high), a new conversion is begun,
after which the device returns to standby mode. If a
conversion is in progress when a one-shot command is
received, the command is ignored. If a one-shot com-
mand is received in autoconvert mode (RUN/STOP bit
= low) between conversions, a new conversion begins,
the conversion rate timer is reset, and the next automat-
ic conversion takes place after a full delay elapses.
Configuration Byte Functions
The configuration byte register (Table 6) is a read-write
register with several functions. Bit 7 is used to mask
(disable) interrupts. Bit 6 puts the MAX6690 into soft-
ware standby mode (STOP) or autoconvert (RUN) mode.
Bit 5 selects the extended temperature range mode,
which allows temperature data to be read down to
-65癈. Bit 4 puts the MAX6690 into parasitic resistance
cancellation mode (PRCM), which can reduce tempera-
ture measurement errors due to resistance in series with
the sensing junction. Bit 3 should always be set to zero
(default value). Bits 2, 1, and 0 are internally set to zero.
Parasitic Resistance Cancellation
Mode
Resistance in series with the remote-sensing junction
causes conversion errors on the order of 0.5癈 per
ohm. The MAX6690 can cancel the effect of parasitic
series resistance by using the PRCM. If bit 4 of the con-
figuration byte is set HIGH, then the PRCM is invoked,
provided the conversion rate is set d 1Hz. If the conver-
sion rate is faster than this, then the setting of bit 4 in
the configuration register is ignored. In the PRCM, the
conversion time is doubled (to typically 500ms to read
both local and remote diodes) but external resistances
as high as 100?can be compensated.
Table 4. Read Format for Alert Response
Address (0001100)
NAME
BIT
Logic 1
0
(LSB)
1
7
(MSB)
ADD7
1
ADD1
2
ADD2
3
ADD3
4
ADD4
5
ADD5
FUNCTION
Provide the current MAX6690
slave address that was latched at
POR (Table 9)
6
ADD6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6690MEE+ | 功能描述:板上安裝溫度傳感器 Remote/Local Temperature Sensor 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 |
| MAX6690MEE+T | 功能描述:板上安裝溫度傳感器 Remote/Local Temperature Sensor 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 |
| MAX6690MEE-T | 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 |
| MAX6690YMEE+ | 功能描述:板上安裝溫度傳感器 Remote/Local Temperature Sensor 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 |
| MAX6690YMEE+T | 功能描述:板上安裝溫度傳感器 Remote/Local Temperature Sensor 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 |
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