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介紹 SIGMA-DELTA 基本理論
% A* M W& L9 m ySIGMA-DELTA (SD) MEASUREMENT ADCS. u7 W0 q$ m/ l0 B2 O
SIGMA-DELTA ADCs
' P+ s2 ^. p+ ]$ G5 O# m Low Cost, High Resolution (to 24-bits) Excellent DNL,
. S- N5 G" A6 e3 I' [- @" B Low Power, but Limited Bandwidth" Q" r _/ S" k4 n" C* @6 n
Key Concepts are Simple, but Math is Complex
+ Q& v v& ~. ^; N6 P Oversampling/ l- e# w$ N( Q' F4 f& Z* ]4 \
Quantization Noise Shaping
/ ]" N! |# \) j/ a Digital Filtering
z# E3 ~+ l$ \) s2 \5 D5 A" R Decimation
* I- t3 F( _0 G% z3 s W Ideal for Sensor Signal Conditioning! q; w8 W& ~# D2 [
High Resolution
7 \' n- g4 e( t2 ^ Self, System, and Auto Calibration Modes
$ Q' I% h" \& M
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