参数资料
型号: LM89CIM/NOPB
厂商: National Semiconductor
文件页数: 14/32页
文件大小: 0K
描述: IC TEMP SENSOR DGTL 8-SOIC
标准包装: 95
功能: 温度监控系统(传感器)
传感器类型: 内部和外部
感应温度: 0°C ~ 125°C
精确度: ±3°C(最小值)
拓扑: ADC(三角积分型),比较器,寄存器库
输出类型: 2 线 SMBus?
输出警报:
输出风扇:
电源电压: 3 V ~ 3.6 V
工作温度: 0°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 管件
配用: LM89EVAL-ND - BOARD EVALUATION LM89
其它名称: LM89CIM
SNIS128C – AUGUST 2002 – REVISED MARCH 2013
The data byte has the most significant bit first. At the end of a read, the LM89 can accept either acknowledge or
No Acknowledge from the Master (No Acknowledge is typically used as a signal for the slave that the Master has
read its last byte). It takes the LM89 31.25ms to measure the temperature of the remote diode and internal diode.
When retrieving all 10 bits from a previous remote diode temperature measurement, the master must insure that
all 10 bits are from the same temperature conversion. This may be achieved by using one-shot mode or by
setting the conversion rate and monitoring the busy bit such that no conversion occurs in between reading the
MSB and LSB of the last temperature conversion.
SMBus Timing Diagrams
Figure 8. LM89 Timing Diagram
(a) Serial Bus Write to the internal Command Register followed by a the Data Byte
Figure 9. LM89 Timing Diagram
(b) Serial Bus Write to the Internal Command Register
1
9
1
9
SMBCLK
SMBDat
a
A6
A5
A4
A3
A2
A1
A0
R/W
D7
D6
D5
D4
D3
D2
D1
D0
Start
by
Master
Address byte.
Frame 1
Serial Bus Address Byte
Ack
by
LM89
Frame 2
Data Byte from the LM89
No Ack Stop
by by
Master Master
Figure 10. LM89 Timing Diagram
(c) Serial Bus Read from a Register with the Internal Command Register preset to desired value
14
Product Folder Links: LM89
Copyright ? 2002–2013, Texas Instruments Incorporated
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