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7733 bảng dữ liệu(PDF) 281 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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7733 bảng dữ liệu(HTML) 281 Page - Renesas Technology Corp

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A-D CONVERTER
7733 Group User’s Manual
9–16
07
05
06
03
00
02
Analog input voltage (mV)
02
01
00
04
02
01
00
01
08
09
10
30
17.5
37.5
q8-bit A-D converter (When VREF = 5.12 V)
Output code
(A-D conversion result)
qM37733MHBXXXFP’s A-D converter with ideal characteristics (When VREF = 5.12 V)
Output code
(A-D conversion result)
8-bit
resolution
10-bit
resolution
(g)
Analog input voltage (mV)
8-bit resolution
10-bit resolution
g: Difference from output code change point
VREF: Reference voltage
(g)
9.4.3 Comparison voltage when resolution = 8 bits
When 8-bit resolution is selected in the M37733MHBXXXFP, the high-order 8 bits of the 10-bit successive
approximation register is the conversion result.
Accordingly, when compared with the 8-bit A-D converter, the comparison reference voltage is different by
3VREF/2048 (refer to the underlined portions in the Table 9.4.1). The difference of the output code change
point is generated as shown in Figure 9.4.3.
M37733MHBXXXFP (When resolution = 8 bits)
8-bit A-D converter
Comparison reference
voltage Vref
VREFV1/28 ! nV2 – VREF/210 ! 0.5
VREF/28 ! n – VREF/28 ! 0.5
VREFV1: Reference voltage
nV2: Contents of successive approximation register
Table 9.4.1 Compare reference voltage
9.4 Absolute accuracy and Differential non-linearity error
Fig. 9.4.3 Difference of output code change point



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