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SD16 Introduction
21-3SD16
Figure 21−1. SD16 Block Diagram
Channel 0
Channel 1
15 0
SD16 Control Block
SD16DIVx
f
M
ACLK
TACLK
SD16SSELx
00
01
10
11
00
01
10
11
MCLK
SMCLK
AV
CC
V
REF
Divider
1/2/4/8
000
SD16INCHx
+
−
001
+
−
010
+
−
011
+
−
100
+
−
101
+
−
110
+
−
111
+
−
PGA
1..32
2
nd
Order
Σ∆ Modulator
SD16GAINx
SD16DF
SD16LP
SD16PRE1
70
SD16SC
Conversion Control
(to prior channel)
SD16OSRx
SD16SNGL
SD16MEM1
Reference
Reference
Conversion Control
(from next channel)
Channel 2
SD16VMIDON
SD16REFON
Temperature sensor
Temperature sensor
f
M
Reference
1.2V
SD16GRP
Group/Start
Conversion Logic
AV
SS
A1.1
A1.0
A1.2
A1.3
A1.4
A1.5
A1.6
A1.7