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ADC12L034 bảng dữ liệu(PDF) 26 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện ADC12L034
Giải thích chi tiết về linh kiện  3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
PDF  35 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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ADC12L034 bảng dữ liệu(HTML) 26 Page - National Semiconductor (TI)

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Application Information (Continued)
the voltages on the V
REF
+ and V
REF
− pins determines the
input voltage span (V
REF). The analog input voltage range is
0toV
A
+. Negative digital output codes result when V
IN
−
>
V
IN
+. The actual voltage at V
IN
− or V
IN
+ cannot go below
AGND.
CH0, CH2, CH4, and CH6 can be assigned to the MUX-
OUT1 pin in the differential configuration, while CH1, CH3,
CH5, and CH7 can be assigned to the MUXOUT2 pin. In the
differential configuration, the analog inputs are paired as
follows: CH0 with CH1, CH2 with CH3, CH4 with CH5 and
CH6 with CH7. The A/DIN1 and A/DIN2 pins can be as-
signed positive or negative polarity.
With the single-ended multiplexer configuration CH0 through
CH7 can be assigned to the MUXOUT1 pin. The COM pin is
always assigned to the MUXOUT2 pin. A/DIN1 is assigned
as the positive input; A/DIN2 is assigned as the negative
input. (See Figure 10 ).
The Multiplexer assignment tables for the ADC12L030,2,4,8
(Tables 2, 3, 4) summarize the aforementioned functions for
the different versions of A/Ds.
4 Differential Channels
8 Single-Ended Channels with
COM as Zero Reference
01183038
01183039
FIGURE 9.
Differential Configuration
Single-Ended Configuration
01183040
A/DIN1 and A/DIN2 can be assigned as the + or − input
01183041
A/DIN1 is + input
A/DIN2 is − input
FIGURE 10.
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