LTC2393-16_1 LINER [Linear Technology], LTC2393-16_1 Datasheet - Page 20

• Manufacturer Part Number: LTC2393-16_1
• Description: 16-Bit, 1Msps SAR ADC With 94db SNR
• Manufacturer: LINER [Linear Technology]

LTC2393-16
APPLICATIONS INFORMATION
BOARD LAYOUT
To obtain the best performance from the LTC2393-16, a
printed circuit board (PCB) is recommended. Layout for
the printed circuit board should ensure the digital and
analog signal lines are separated as much as possible.
In particular, care should be taken not to run any digital
clocks or signals alongside analog signals or underneath
the ADC.
20
249Ω
249Ω
1%
1%
R2
R3
C2
2200pF
1206 NPO
CNVST
C54
OPT
C55
OPT
44
43
5V
10μF
AVP/AVL AVP AVP AVP AVP
C53
IN
IN
Partial Schematic of Demoboard
+
–
47
VCM
CNVST
C31
0.1μF
36
GND GND GND GND GND GND OGND
34
OB/2C
48
46
6
44
45
REFSENSE
GND
C30
10μF
LTC2393-16
5
41
40
LTC2393-16
39
SER/PAR
Recommended Layout
The following is an example of a recommended PCB layout.
A single solid ground plane is used. Bypass capacitors to
the supplies are placed as close as possible to the supply
pins. Low impedance common returns for these bypass
capacitors are essential to the low noise operation of the
ADC. The analog input traces are screened by ground.
For more details and information refer to DC1500A, the
evaluation kit for the LTC2393-16
2
35
1.0Ω
R24
4
REFIN
DVP
20
RESET
19
38
1
32
DVP/DVL
C29
0.1μF
C36
1μF
PD
REFOUT
3
33
17
D10/SDOUT
BYTESWAP
D11/SCLK
D9/SDIN
37
OVP
CS
BUSY
31
C28
10μF
18
GND
D15
D14
D13
D12
RD
D8
D7
D6
D5
D4
D3
D2
D1
D0
30
239316 TA02
29
28
27
26
25
24
23
22
21
16
15
14
13
12
11
10
9
8
7
3.3V
C40
4.7μF
BUSY
D15
D14
D13
D12
D11/SCLK
D10/SDOUT
D9/SDIN
D8
D7
D6
D5
D4
D3
D2
D1
D0
239316f