參數(shù)資料
型號: PNX8511
廠商: NXP Semiconductors N.V.
英文描述: Analog companion chip
中文描述: 模擬伴隨芯片
文件頁數(shù): 83/92頁
文件大小: 3064K
代理商: PNX8511
Philips Semiconductors
PNX8510/11
Analog companion chip
Product data
Rev. 04 – 12 January 2004
83 of 92
9397 750 12612
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
10.3.1
Programming example
Assuming an effective load of 75
/ 75
= 37.5
, Rset = 1 k
, the coarse bits are
set to 0 0 0 0 and the fine adjust bits are set to 0 0 0 0 0. The output will be sitting at
the minimum level of
Vout = 0.579 V.
For example, if Vout is set to 1 V, then the fine adjust bits should be set to 0 0 0 0 0
and the coarse adjust bits set to 1 0 1 0 0.
Figure 34
provides an example for calculating the RSet for the video DACs from
given output voltage and termination.
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
+50.1%
+53.7%
+57.3%
+60.8%
+64.4%
+68%
+71.6%
+75.1%
+78.7%
+82.3%
+85.9%
+89.5%
+93.0%
+96.6%
+100.2%
+103.8%
+107.4%
+110.9%
Table 46:
(Output Level: Coarse Adjustment for each DAC)
Bits
11111
43210
Separate I
2
C bits 31x21mV
…continued
Vout
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