ADL5565AXPZ-R7 Analog Devices Inc, ADL5565AXPZ-R7 Datasheet - Page 15

• Manufacturer Part Number: ADL5565AXPZ-R7
• Manufacturer: Analog Devices Inc

Specifications of ADL5565AXPZ-R7

• Lead Free Status / Rohs Status: Compliant

Preliminary Technical Data
EVALUATION BOARD
Figure 11 shows the schematic of the ADL5565 evaluation board.
The board is powered by a single supply in the 3 V to 5 V range.
The power supply is decoupled by 10 μF and 0.1 μF capacitors.
Table 5 details the various configuration options of the evaluation
board. Figure 12 and Figure 13 show the component and circuit
layouts of the evaluation board.
To realize the minimum gain (6 dB into a 200 Ω load), Input 1
(VIN1 and VIP1) must be used by installing 0 Ω resistors at R3
and R4, leaving R5 and R6 open. R1 and R2 must be 33.2 Ω for
a 50 Ω input impedance.
Likewise, driving Input 2 (VIN2 and VIP2) realizes the middle
gain (12 dB into a 200 Ω load) by installing 0 Ω at R5 and R6
and leaving R3 and R4 open. R1 and R2 must be 50 Ω for a
50 Ω input impedance.
For the maximum gain (15.5 dB into a 200 Ω load), both inputs
are driven by installing 0 Ω resistors at R3, R4, R5, and R6. R1
and R2 are open for a 50 Ω input impedance.
J2
OPEN
J1
R12
OPEN
R13
OPEN
C12
0Ω
T1
open
open
R1
R2
VPOS
0.01µF
0.01µF
C1
C2
R5
0Ω
R3
0Ω
R4
0Ω
R6
0Ω
C3
10µF
1
2
3
4
C4
0.1µF
VIP2
VIP1
VIN1
VIN2
GND
VCC
16
Figure 11. Evaluation Board Schematic
5
ADL5565
GND GND
C5
0.1µF
VCC
15
6
Rev. PrB | Page 15 of 18
VCC
14
7
C6
0.1µF
VOCM
GND
ENBL
VCC
13
VON
VOP
8
C7
0.1µF
The balanced input and output interfaces are converted to
single ended with a pair of baluns (M/A-COM ETC1-1-13).
The balun at the input, T1, provides a 50 Ω single-ended-to-
differential transformation. The output balun, T2, and the
matching components are configured to provide a 200 Ω to 50 Ω
impedance transformation with an insertion loss of about 17 dB.
As an alternative, the input transformer, T1, can be replaced with
one of the following transformers to provide a low loss balanced
input to the ADL5565. 6 dB gain configuration, Mini Circuits,
TC4-1W+, 12 dB gain configuration, Mini Circuits, TC2-1T+, 15
dB gain configuration, TC1.5-52T. When using these alternative
transformers, R1 & R2 are left open. C1 & C2 should be replaced
with a 0 ohm jumper and a 0.1 μF capacitor is added at C12.
12
11
10
9
0.01µF
0.01µF
C10
C11
0.1µF
C9
VPOS
GND
AGND
P1
84.5Ω
84.5Ω
ENBL
VCOM
R7
R8
34.8Ω
34.8Ω
C8
0.1µF
R10
R9
OPEN
C13
R14
T2
0Ω
OPEN
R11
R15
OPEN
ADL5565
J3
J4 OPEN