Datasheet

t − Time − s
8120
8140
8160
8180
8200
8220
8240
8260
0 2 4 6 8 10 12 14
Code − LSB
G084
Device With
Offset Cancelled
Device With
Initial Offset
Offset Loop
Enabled Here
ADS62P45, ADS62P44
ADS62P43, ADS62P42
SLAS561C –JULY 2007– REVISED FEBRUARY 2012 www.ti.com
It is also possible to freeze the offset correction using the serial interface (<OFFSET LOOP FREEZE>). Once
frozen, the offset estimation becomes inactive and the last estimated value is used for correction every clock
cycle. Note that the offset correction is disabled by default after reset.
Figure 101 shows the time response of the offset correction algorithm, after it is enabled.
Figure 101. Time Response of Offset Correction
Gain Correction
ADS62P4X has ability to make fine corrections to the ADC channel gain. The corrections can be done in steps of
0.05 dB, up to a maximum of 0.5 dB, using the register bits ( GAIN CORRECTION). Only positive corrections are
supported and the same correction applies to both the channels.
Table 23. Gain Correction Values
<GAIN CORRECTION> AMOUNT OF CORRECTION,
D3-D2-D1-D0 dB
0000 0
0001 +0.05
0010 +0.1
0011 +0.15
0100 +0.20
0101 +0.25
0110 +0.30
0111 +0.35
1000 +0.40
1001 +0.45
1010 +0.5
Other combinations Unused
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Product Folder Link(s): ADS62P45, ADS62P44 ADS62P43, ADS62P42