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SD16_A Introduction
22-3SD16_A
Figure 22−1. SD16_A Block Diagram
15 0
SD16DIVx
ACLK
TACLK
SD16SSELx
00
01
10
11
00
01
10
11
MCLK
SMCLK
AV
CC
V
REF
Divider
1/2/4/8
A0
000
SD16INCHx
+
−
001
+
−
010
+
−
011
+
−
100
+
−
101
+
−
110
+
−
111
+
−
A1
A2
A3
A4
A5
A6
2
nd
Order
Σ∆ Modulator
SD16GAINx
SD16DF
SD16LP
SD16SC
SD16OSRx
SD16SNGL
SD16MEM0
Reference
A7
SD16VMIDON
SD16REFON
f
M
Reference
1.2V
Start Conversion
Logic
AV
SS
SD16XDIVx
Divider
1/3/16/48
SD16XOSR
BUF
SD16BUFx
1
0
SD16UNI
1
AVCC
SD16INCHx=101
Temp.
sensor
PGA
1..32
5R
R
5R