ADS8555_14 Datasheet, PDF (29/37 Pages) Texas Instruments – 16-Bit, Six-Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

ADS8555
www.ti.com
ADS8555
Top View
SBAS531B – DECEMBER 2010 – REVISED FEBRUARY 2011
To
BVDD
To AVDD
To AVDD
0.1mF 10mF 10mF 10mF 0.47mF 0.1mF
64 63 62 61
58
56
54
51
1
2
3
4
5
6
7
1 ^BGND
mF _BVDD
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24
27 28 29
0.1mF
0.1mF
48
0.1
mF
AVDD
AVDD
45
0.1
mF
AGND
AGND
0.1
42 _mF
AVDD
AVDD
39
0.1
mF
AGND
AGND
0.1
36 _mF
AVDD
AVDD
33
0.1
mF
0.1mF
To DUT
10
mF
To AVDD
To AVDD
To AVDD
10mF
10mF
LEGEND
TOP layer; copper pour and traces
Lower layer; AGND area
Lower layer; BGND area
Via
To
AVDD
To
HVSS/HVDD
(1) All 0.1μF, 0.47μF, and 1μF capacitors should be placed as close to the ADS8555 as possible.
(2) All 10μF capacitors should be close to the device but without compromising the placement of the smaller capacitors.
Figure 35. Layout Recommendation
AVDD Source
© 2010–2011, Texas Instruments Incorporated
29
Product Folder Link(s): ADS8555