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| 型号： | DS1780E/T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC CPU PERIPHERAL MON 24-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 功能： | 温度监控器，CPU 外围设备 |
| 传感器类型： | 内部 |
| 感应温度： | -40°C ~ 125°C |
| 精确度： | ±12°C（最小值） |
| 拓扑： | ADC（三角积分型），比较器，风扇速度控制，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 2.8 V ~ 5.75 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 带卷 (TR) |
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DS1780
OPERATION - Analog Output
The DS1780 has a single analog output from a unsigned 8-bit D/A which produces 0-1.25 volts; this is
amplified and scaled with external circuitry such as a op-amp and transistor to provide fan speed control.
This register is set to 0xFF on power-up, which produces full fan speed. The analog output register (19h)
is unaffected by any reset other than power-on.
This voltage must be scaled and have an output current of at least 250 mA which is needed to drive the
fans; Figure 6 is a simple circuit that can be used, and Table 9 suggest R1 and R2 to select gain.
Although it is recommended to connect the DS1780 analog output to a high impedance node such as that
in Figure 6, the output driver can source 2.0 mA (max) at V OUT = 1.25V while maintaining the error spec
of 5% of FSR over temperature and supply voltage. Stability is guaranteed for a load capacitance up to
100 pF. More capacitance could cause severe overshoots and possible oscillation.
FAN AMPLIFIER CIRCUIT EXAMPLE Figure 6
AMPLIFIER DESIGN EXAMPLES Table 9
Input
Output
Gain
R1
1,000
2,200
3,300
4,700
10,000
1.22
12
9.84
R2
9,000
19,439
29,159
41,530
88,361
OPERATION - NAND TREE Test
A NAND tree is provided in the DS1780 for Automated Test Equipment (ATE) board level connectivity
testing. If the user applies (V DD - 0.5V) to the NT IN input, the device will be in the NAND tree test mode.
A0/NT OUT will become the NAND tree output pin. To perform a NAND tree test all pins included in the
NAND tree (see Figure 7 below) should be driven high.
Beginning with A1 and working around the chip, each pin can be toggled and a resulting toggle can be
observed on A0/NT OUT .
Allow for a typical propagation delay of 100 ns.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1780K | 功能描述:KIT EVALUATION DS1780 RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| DS17885 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clock |
| DS17885-3 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS17885-3+ | 功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS17885-5 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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