SX8722I070LF SEMTECH [Semtech Corporation], SX8722I070LF Datasheet - Page 28

• Manufacturer Part Number: SX8722I070LF
• Description: High gain acquisition for sensor interface
• Manufacturer: SEMTECH [Semtech Corporation]

9.4. Programmable gain amplifier settings
9.4.1. Overview
The diagram above shows the programmable gain amplifier organization, these are 3 PGA that are cascaded, the gain is
made by multiplying them (disabled PGAs have the equivalent gain of 1).
ACS - Revision 4.2
©2008 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
A
AC
AR
0
0
1
2
3
4
5
6
7
1
2
3
V
IN
Figure 16. Programmable gain amplifiers (PGA) in the acquisition chain
C
B
f
S
V
REF
October 2008
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-
1 - 10
PGA1
+
-
OFF2
-5/5
+
-
5/5
...
1 - 2 - 5 - 10
PGA2
+
-
Page 28
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-
+
-
0/12 to 127/12
PGA3
OFF3
-63/12
63/12
High gain acquisition for sensor interface
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+
-
V
IN, ADC
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-
D
ADC
f
S
E
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