Datasheet

www.ti.com Bill of Material
6 Bill of Material
The Bill of Material (BOM) of the evaluation board is in Table 2.
Table 2. Bill of Material
Designator Description Comment
C1, C3, C12 Case A Capacitor 4.7 µF
C2, C4, C5, C10, C11, C14 0603 Capacitor 0.1 µF
C6, C16 0603 Capacitor 10 pF
C7, C17 0603 Capacitor 22 pF
C8, C18 0603 Capacitor 33 pF
C9, C19 0603 Capacitor 47 pF
C13 Case A Capacitor 2.2 nF
C15 1206 Capacitor 0.1 µF
C20 0603 Capacitor 0.01 µF
C21 0603 Capacitor 470 pF
CON1, CON2, CON3, CON4, CON5 Connector Banana
CON6, CON7, CON8, CON9, CON10 Connector SMA
J1, J3 Header 4x2
J2 Header 3x2
J4, J4 Header 2x2
J5, J6, J7 Header 3x1
J9 Test Socket 8 pin
J10 Test Socket 6 pin
R1, R4, R5, R6, R7, R8, R10 0603 Resistor 0Ω
R2, R11 0603 Resistor 10 kΩ
R3 0603 Resistor 100 kΩ
R9 0603 Resistor 51Ω
TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, Test Point NC
TP10, TP11, TP12, TP13, TP14, TP15, TP16
U1 IC LMH6559
U2 IC LMH2191
X1 TCXO - 26.000 MHz Kyocera Corporation Part#:
KT2520F26000ACW18TAL
7 Board Layout
As with any other device, careful attention must be paid to the board layout. If the board isn't properly
designed, the performance of the device can be less than might be expected. Especially the input clock
trace (SCLK_IN) and output traces (CLK1/2) should be as short as possible to reduce the capacitive load
observed by the clock outputs. Also proper decoupling close to the device is necessary. Beside a
capacitor in the µF range, a capacitor of 100 nF on V
BAT
and V
OUT
is recommended close to the device.
The equivalent series resistance (ESR) of the capacitors should be sufficiently low. A standard capacitor is
usually adequate. The component locations of the evaluation board are shown in Figure 5 and Figure 6.
The copper layers of are shown in Figure 7 and Figure 8.
9
SNAA071A–July 2010–Revised May 2013 AN-2028 LMH2191 Evaluation Board
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