Texas Instruments AFE5809 Evaluation Module AFE5809EVM AFE5809EVM 데이터 시트
제품 코드
AFE5809EVM
Hardware Setup, CW Mode
9.3
External Clock for CW Mode
The CW mode clocks can be supplied from J9 (X16/X8/X4/X1) and J10 (X1) using external signal
generators. The manufacture default setup uses ON BOARD CLOCK, with which C154, C155, C156, and
C157 are installed. To switch to an external clock, these four capacitors must be uninstalled and
capacitors C49,C50,C52, and C53 must be installed. The following table shows the configuration for these
eight capacitors.
generators. The manufacture default setup uses ON BOARD CLOCK, with which C154, C155, C156, and
C157 are installed. To switch to an external clock, these four capacitors must be uninstalled and
capacitors C49,C50,C52, and C53 must be installed. The following table shows the configuration for these
eight capacitors.
Table 1. Configuration for Clock Capacitors
Capacitor
Onboard Clock
External Clock
Comments
C27
Uninstalled
Installed
Top layer of the EVM
C28
Uninstalled
Installed
Bottom layer of the EVM
C100
Uninstalled
Installed
Bottom layer of the EVM
C102
Uninstalled
Installed
Top layer of the EVM
C29
Installed
Uninstalled
Top layer of the EVM
C30
Installed
Uninstalled
Top layer of the EVM
C25
Installed
Uninstalled
Top layer of the EVM
C26
Installed
Uninstalled
Top layer of the EVM
Figure 22. Relevant Capacitors for CW Mode, Top and Bottom Side
9.4
External ADC Sampling Clock
To use the external clock generator to test the AFE5809, perform the following steps.
1. Reconfigure JP9 as shown in
. The rest of the jumpers remain the same.
2. Connect the external generator as shown in
3. Set the generator output to 65 MHz, 13 dBm.
23
SLOU338A – October 2012 – Revised November 2012
AFE5809EVM Evaluation Module
Copyright © 2012, Texas Instruments Incorporated