参数资料
型号: EVAL-AD1940AZ
厂商: Analog Devices Inc
文件页数: 28/36页
文件大小: 0K
描述: BOARD EVAL AD1940 SIGMADSP
标准包装: 1
系列: SigmaDSP®
主要目的: 音频,音频处理
嵌入式: 是,DSP
已用 IC / 零件: AD1940
主要属性: 单芯片多通道 28/56 位音频 DSP
次要属性: 均衡,交叉,低音增强,多频带动态处理,延迟等
已供物品:
AD1940/AD1941
Rev. B | Page 34 of 3
6
There are two specifications that should be taken into
consideration when choosing a regulator transistor. First, the
transistor’s current amplification factor (hFE or beta) should be
at least 100. Second, the transistor’s collector needs to be able to
dissipate the heat generated when regulating from 3.3 V or 5 V
to 2.5 V. The maximum current draw of the AD1940/AD1941 is
163 mA (maximum digital current + maximum PLL current).
The equations for the minimum power dissipation specs for
both 3.3 V and 5 V follow:
(5 V – 2.5 V) × 163 mA = 480 mW
(3.3 V – 2.5 V) × 163 mA = 130 mW
If the regulator is not used in the design, VREF, VDRIVE, and
VSENSE can be tied to ground. VSUPPLY should be connected
to the same or higher potential as the VDD pin.
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