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參數(shù)資料
| 型號： | MAX6690MEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | QUADRUPLE 2-INPUT POSITIVE-OR GATES 14-CFP -55 to 125 |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | 0.150 INCH, 0.25 INCH, MO-137AB, QSOP-16 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大小： | 235K |
| 代理商： | MAX6690MEE |
M
2°C Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
______________________________________________________________________________________
11
When the conversion rate is greater than 1Hz, tempera-
ture data can be read from the read internal tempera-
ture (00h) and read external temperature (01h)
registers. The temperature data format is 7 bits plus
sign in two
’
s-complement form for each channel, with
the LSB representing 1
°
C (Table 2), transmitted MSB
first. When the conversion rate is less than 1Hz, the
extended data can be read from the read external
extended temperature register (10h) and the read inter-
nal extended temperature register (11h), and the first 3
bits of the register represent 1/2, 1/4, and 1/8 of a
degree. Measurements are offset by +1/2
°
C to mini-
mize quantization errors; for example, +99.6
°
C is
reported as +100
°
C.
When the conversion rate is 1Hz or less, the first 8 bits
of temperature data can be read from the read internal
temperature (00h) and read external temperature (01h)
registers, the same as for faster conversion rates. An
additional 3 bits can be read from the read external
extended temperature and read internal extended tem-
perature registers, which extend the resolution to
0.125
°
C per LSB (Table 3).
If a conversion ends after reading the main register but
before reading the extended register, the extended
register contains the 3LSBs from the new conversion
while the main register contains the 8MSBs from the
previous conversion. The extended data in this case is
meaningless. To avoid this problem, read extended
resolution temperature data using one of the following
approaches:
1) Put the MAX6690 into standby mode by setting bit 6
of the configuration register to 1. Initiate a one-shot
conversion using Command Byte 0Fh. When this
conversion is complete, read the contents of the
temperature data registers.
2) If the MAX6690 is in run mode and the conversion
rate is not set to either 1Hz or 8Hz, read the Status
Byte. If the BUSY bit indicates that a conversion is
in progress, wait until the conversion is complete as
indicated by the BUSY bit. Then immediately read
the contents of the temperature data registers. If no
conversion is in progress, the data can be read
within a few μs, which is a sufficiently short period
to ensure that a new conversion can
’
t be completed
until after the data has been read.
Note:
Extended resolution applies only for conver-
sion speeds of 1Hz and below.
Alarm Threshold Registers
Four registers store alarm threshold data, with high-
temperature (T
HIGH
) and low-temperature (T
LOW
) reg-
isters for each A/D channel. If either measured
temperature equals or exceeds the corresponding
alarm threshold value, an
ALERT
interrupt is asserted.
The POR state of both T
HIGH
registers is full scale
(0111 1111, or +127
°
C). The POR state of both T
LOW
registers is 1100 1001 or -55
°
C.
Diode Fault Alarm
There is a continuity fault detector at DXP that detects
whether the remote diode has an open-circuit condition
or if DXP is shorted to DXN, GND, or V
CC
. If an open
circuit exists, then the temperature register is loaded
with 1000 0000, and bit 3 of the status register is set to
1 at the end of a conversion. This means that immedi-
ately after POR, the status byte indicates no fault is pre-
sent until the end of the first conversion.
TEMP (
°
C)
ROUNDED TEMP (
°
C)
DIGITAL
OUTPUT
130.00
127.00
126.00
25.25
0.50
0.00
+127
+127
+127
+25
+1
0
0 111 1111
0 111 1111
0 111 1111
0 001 1001
0 000 0001
0 000 0000
1 000 0000
1 111 1111
1 000 0000
<0.00 (Note 1)
-1
<-64
(Normal mode)
(Extended temp mode)
(Extended temp mode)
Diode fault
(short or open)
1 000 0000
Table 2. Data Format
FRACTIONAL
TEMPERATURE
DIGITAL OUTPUT
0.000
0.125
0.250
0.375
0.500
0.625
0.750
0.875
000X XXXX
001X XXXX
010X XXXX
011X XXXX
100X XXXX
101X XXXX
110X XXXX
111X XXXX
Table 3. Extended Resolution Register
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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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