- 您现在的位置：买卖IC网 > PDF目录1788 > DS2438Z+T&R (Maxim Integrated Products)IC MONITOR SMART BATTERY 8-SOIC PDF资料下载
参数资料
| 型号： | DS2438Z+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/29页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR SMART BATTERY 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 智能电池 |
| 电源电压： | 2.4 V ~ 10 V |
| 工作温度： | -40°C ~ 85°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-SOIC |
| 包装： | 带卷 (TR) |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
DS2438
OPERATION-MEASURING TEMPERATURE
The DS2438 measures temperatures through the use of an on-board temperature measurement technique.
The temperature reading is provided in a 13-bit, two’s complement format, which provides 0.03125 ° C of
resolution. Table 1 describes the exact relationship of output data to measured temperature. The data is
transmitted serially over the 1-Wire interface. The DS2438 can measure temperature over the range of
-55 ° C to +125 ° C in 0.03125 ° C increments. For Fahrenheit usage, a lookup table or conversion factor
must be used.
Note that temperature is represented in the DS2438 in terms of a 0.03125 ° C LSb, yielding the following
13-bit format. The 3 least significant bits of the Temperature Register will always be 0. The remaining
13 bits contain the two’s complement representation of the temperature in ° C, with the MSb holding the
sign (S) bit. See “Memory Map” section for the Temperature Register address location.
Temperature Register Format Table 1
2 -1
2 -2
2 -3
2 -4
2 -5
0
0
0
LSB
MSb
(unit = °C)
LSb
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSB
TEMPERATURE
+125°C
+25.0625°C
+0.5°C
0°C
-0.5°C
-25.0625°C
-55°C
DIGITAL OUTPUT (Binary)
01111101 00000000
00011001 00010000
00000000 10000000
00000000 00000000
11111111 10000000
11100110 11110000
11001001 00000000
DIGITAL OUTPUT (Hex)
7D00h
1910h
0080h
0000h
FF80h
E6F0h
C900h
OPERATION-MEASURING BATTERY VOLTAGE
The on-board analog-to-digital converter (ADC) has 10 bits of resolution and will perform a conversion
when the DS2438 receives a command protocol (Convert V) instructing it to do so. The result of this
measurement is placed in the 2-byte Voltage Register. The range for the DS2438 ADC is 0 volt to
10 volt; this range is suitable for NiCd or NiMH battery packs up to six cells, and for lithium ion battery
packs of two cells. The full-scale range of the ADC is scaled to 10.23 volt, resulting in a resolution of
10 mV.
While the ADC has a range that extends down to 0 volt, it is important to note that the battery voltage can
also be the supply voltage to the DS2438. As such, the accuracy of the ADC begins to degrade below
battery voltages of 2.4 volt, and the ability to make conversions is limited by the operating voltage range
of the DS2438.
Voltage is expressed in this register in scaled binary format, as outlined in Table 2. Note that while codes
exist for values below 2.4 volt, accuracy of the ADC and the limitation on the DS2438’s supply voltage
make it unlikely that these values would be used in actual practice. See “Memory Map” section for the
Voltage Register address location.
4 of 29
相关PDF资料 |
PDF描述 |
|---|---|
| DS2703U+ | IC BATT AUTHENTICATE SHA-1 8UMAX |
| DS2705U+ | IC AUTHENTICATE SHA-1 8-UMAX |
| DS2710G+ | IC NIMH CHRGR SGL-CELL 10-TDFN |
| DS2712Z+T&R | IC NIMH CHARGER 16SOIC |
| DS2714E+ | IC NIMH CHARGER QUAD 20TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS244 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Octal Buffer/Line Driver with 3-State Outputs |
| DS2441 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1-Cell Li-Ion Battery Manager |
| DS2442 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Battery Management |
| DS245 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Octal Bus Transceiver |
| DS2450 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1-Wire Quad A/D Converter |
发布紧急采购，3分钟左右您将得到回复。