参数资料
型号: 101-0814
厂商: Rabbit Semiconductor
文件页数: 25/94页
文件大小: 0K
描述: COMPUTER SNG BD BL1810 512K SRAM
标准包装: 10
系列: SBC
模块/板类型: 单板计算机模块
适用于相关产品: BL1810
User’s Manual
27
The resolution of the DA0 output depends on the smallest increment of time to change the
on/off time (the time between 5 V and 0 V). The Jackrabbit uses the Rabbit 2000’s Port D
control registers to clock out the signal at a timer timeout. The timer used is timer B.
Timer B has 10 bits of resolution so that the voltage can be varied in 1/1024 increments.
The resolution is thus about 3.88 mV for the DA0 output voltage range of 0 V to 3 V in the
12%–88% duty cycle.
An LM324 op amp, which can comfortably source 10 mA throughout the D/A converter
range, drives the D/A converter output. If the output voltage is above 1 V, the D/A con-
verter can comfortably sink 10 mA. Below 1 V, the D/A converter can only sink a maxi-
mum of 100 A.
The peak-to-peak ripple on DA0 is less than 3 mV. There is a way to get rid of the ripple
for very small periods of time. To do that, simply program the PWM port from a PWM
output to a high-impedance input. This will allow the capacitor to hold the voltage subject
only to leakage currents, which add up to about 1 A. This will cause the capacitor to
change voltage at the rate of 10 V per second, or 10 mV per millisecond. Practically, this
means that the PWM can stop for about 1 ms (seven 1024-count D/A converter cycles on
a 14.74 MHz processor clock) with a voltage movement of less than 10 mV.
To summarize, DA0 is provided uncalibrated, can be programmed with a resolution of
3.88 mV and a peak-to-peak ripple less than 3 mV over the range from 0.1 V to 2.8 V and
at 3.35 V. The settling time to within 3 mV is 54 ms.
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101-0815 功能描述:单板计算机 SR9100 512K SRAM RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
101-0816 功能描述:KIT DEV RABBITCORE TCP/IP 2000 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:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK(80-QFP ZIF 插口) 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035
101-0817 功能描述:单板计算机 BL2030 512K SRAM RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
101-0818 功能描述:单板计算机 BL2100 Fric Lk 512K RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
101-0820 功能描述:COMPUTER SGL-BD BL2000 SRAM/FLSH RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器或微处理器模块 系列:SBC 产品目录绘图:DLP-245SY-G 标准包装:1 系列:USB 模块/板类型:开发板 适用于相关产品:USB 其它名称:813-1006