参数资料
型号: 7805ALPRPFB
厂商: MAXWELL TECHNOLOGIES
元件分类: ADC
英文描述: 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, DFP28
封装: RAD-PAK, LDFP-28
文件页数: 18/34页
文件大小: 605K
代理商: 7805ALPRPFB
Memory
PRELIMINARY
25
All data sheets are subject to change without notice
2001 Maxwell Technologies
All rights reserved.
16-Bit Latchup Protected ADC
7805ALP
12.19.01 Rev 6
1000583
TABLE 21. TWOS COMPLEMENT CODE TABLE FOR SUB DAC
FIGURE 22. SUB DAC OUTPUT VOLTAGE VS. DAC INPUT CODES (HEX) FOR TWOS COMPLEMENT CODING
The total output for a single channel when using twos complement coding is the sum of the voltage from the Main DAC
and the Sub DAC.
VOUT = VOUT' + VOUT"
= VBIAS + 1.875 x VBIAS x (NA/1024) + VBIAS/16 x (NB/256)
= VBIAS x (1 + 1.875 x NA/1024 + NB/4096)
where NA ranges from –512 to +511 and NB ranges from –128 to +127. Figure 28 shows a pictorial view of the trans-
fer function for any DAC.
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