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參數(shù)資料
| 型號： | MAX6654MEE+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 1°C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 1Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, MO-137AB, QSOP-16 |
| 文件頁數(shù)： | 6/18頁 |
| 文件大?。?/td> | 376K |
| 代理商： | MAX6654MEE+ |
MAX6654
1°C Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
14
______________________________________________________________________________________
The MAX6654 incorporates collision avoidance so that
completely asynchronous operation is allowed between
SMBus operations and temperature conversions.
When autoconverting, if the THIGH and TLOW limits are
close together, it’s possible for both high-temp and low-
temp status bits to be set, depending on the amount of
time between status read operations (especially when
converting at the fastest rate). In these circumstances,
it is best not to rely on the status bits to indicate rever-
sals in long-term temperature changes. Instead, use a
current temperature reading to establish the trend
direction.
Conversion Rate Byte
The conversion rate register (Table 8) programs the
time interval between conversions in free-running auto-
convert mode. This variable rate control can be used to
reduce the supply current in portable-equipment appli-
cations. The conversion rate byte’s POR state is 02h
(0.25Hz). The MAX6654 looks only at the 3LSB bits of
this register, so the upper 5 bits are “don’t care” bits,
which should be set to zero. The conversion rate toler-
ance is ±25% at any rate setting.
Valid A/D conversion results for both channels are
available one total conversion time (125ms nominal,
156ms maximum) after initiating a conversion, whether
conversion is initiated through the RUN/STOP bit, hard-
ware STBY/pin, one-shot command, or initial power-up.
Extended resolution and the parasitic resistance can-
cellation mode are available at conversion rates of 1Hz
or lower.
Slave Addresses
The MAX6654’s device address can be set to one of
nine different values by pin strapping ADD0 and ADD1
so that more than one MAX6654 can reside on the
same bus without address conflicts (Table 9).
The address pin states are checked at POR only, and
the address data stays latched to reduce quiescent
supply current due to the bias current needed for high-
Z state detection.
The MAX6654 also responds to the SMBus Alert
Response slave address (see the Alert Response
Address section).
POR and UVLO
The MAX6654 has a volatile memory. To prevent
ambiguous power-supply conditions from corrupting
the data in memory and causing erratic behavior, a
POR voltage detector monitors VCC and clears the
memory if VCC falls below 2V (typ, see Electrical
Characteristics). When power is first applied and VCC
rises above 2.0V (typ), the logic blocks begin operat-
ing, although reads and writes at VCC levels below 3V
are not recommended. A second VCC comparator, the
ADC undervoltage lockout (UVLO) comparator, pre-
vents the ADC from converting until there is sufficient
headroom (VCC = 2.8V typ).
BIT
NAME
POR
STATE
FUNCTION
7 (MSB)
BUSY
0
ADC is busy converting when high.
6
LHIGH
0
Internal high-temperature alarm has tripped when high; cleared by POR or readout
of the entire status byte if the fault condition no longer exists.
5
LLOW
0
Internal low-temperature alarm has tripped when high; cleared by POR or readout of
the entire status byte if the fault condition no longer exists.
4
RHIGH
0
External high-temperature alarm has tripped when high; cleared by POR or readout
of the entire status byte if the fault condition no longer exists.
3
RLOW
0
External low-temperature alarm has tripped when high; cleared by POR or readout
of the entire status byte if the fault condition no longer exists.
2
OPEN
0
A high indicates an external diode open; cleared by POR or readout of the entire
status byte if the fault condition no longer exists.
1 or 0
RFU
0
Reserved.
Table 7. Status Byte Bit Assignments
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6654MEE+ | 功能描述:板上安裝溫度傳感器 1C Accurate 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 |
| MAX6654MEE+T | 功能描述:板上安裝溫度傳感器 1C Accurate 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 |
| MAX6654MEET | 制造商:MAXIM 功能描述:New |
| MAX6654MEE-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 |
| MAX6654YMEE+ | 功能描述:板上安裝溫度傳感器 1C Accurate 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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