ADL5812-EVALZ AD [Analog Devices], ADL5812-EVALZ Datasheet - Page 25

• Manufacturer Part Number: ADL5812-EVALZ
• Description: Dual High IP3, 700 MHz to 2800 MHz, Double Balanced, Passive Mixer, IF Amplifier, and Wideband LO Amplifier
• Manufacturer: AD [Analog Devices]

EVALUATION BOARD
An evaluation board is available for the ADL5812. The standard
evaluation board schematic is presented in Figure 62. The USB
interface circuitry schematic is presented in Figure 65. The
evaluation board layout is shown in Figure 63 and Figure 64.
Table 12. Evaluation Board Configuration
Components
C1, C2, C8, C11, C12,
C13, C14, C15, C18,
C19, C20, C23, C26,
C27
C6, C7, C24, C25
C3, C4, C5, C28, C29,
C30, L1, L2, L3, L4,
R20, R21, R22, R23,
T1, T2
C17
R1, R2
VCC
VCC
RFIN2
RFIN1
C26
0.1µF
Description
Power supply decoupling. Nominal supply decoupling consists of a
0.1 μF capacitor to ground in parallel with a 10 pF capacitor to
ground positioned as close to the device as possible.
RF input interface. The input channels are ac-coupled through C6 and
C24. C7 and C25 provide bypassing for the center tap of the RF input
baluns.
IF output interface. The open-collector IF output interfaces are biased
through pull-up choke inductors L1, L2, L3, and L4. T1 and T2 are 4:1
impedance transformers used to provide single-ended IF output
interfaces, with C5 and C30 providing center-tap bypassing. Remove
R21 and R22 for balanced output operation.
LO interface. C17 provides ac coupling for the LOIP local oscillator input.
Bias control. R1and R2 set the bias point for the internal IF amplifier.
C1
0.1µF
C7
22pF
22pF
22pF
C24
C8
0.1µF
C6
C27
0.1µF
C2
0.1µF
22pF
C25
470nH
470nH
470nH
470nH
L4
L3
L1
L2
10
C2.3
10pF
1
2
3
4
5
6
7
8
9
RF1
RFCT1
NC
NC
NC
NC
NC
NC
RFCT2
RF2
PAD
910Ω
910Ω
R2
R1
Figure 62. Evaluation Board Schematic
ADL5812
120pF
120pF
120pF
120pF
C4
C3
C4
C3
Rev. 0 | Page 25 of 28
TC4-1W+
3
2
1
TC4-1W+
3
2
1
C30
120pF
T1
C5
120pF
T1
4
6
4
6
V1LO1
V2LO1
DATA
LOIN
LOIP
CLK
NC
NC
NC
LE
The evaluation board is fabricated using Rogers® 3003 material.
Table 12 details the configuration for the mixer characterization.
The evaluation board software is available on www.analog.com.
R22
0Ω
R23
OPEN
R21
0Ω
R20
OPEN
30
29
28
27
26
25
24
23
22
21
IFOP
IFON
IFOP
IFON
C15
10pF
LE
DATA
CLK
VCC
C16
22pF
22pF
C11
10pF
C12
10pF
C13
10pF
C14
10pF
C17
C18
10pF
C19
10pF
C20
10pF
Default Conditions
C1, C2, C26, C27 = 0.1 μF (size 0402),
C8, C11, C12, C13, C14, C15, C18, C19,
C20, C23 = 10 pF (size 0402)
C6, C24 = 22 pF (size 0402),
C7, C25 = 22 pF (size 0402)
C3, C4, C5, C28, C29, C30 = 120 pF (size 0402),
L1, L2, L3, L4 = 470 nH (size 0603),
R20, R23 = open,
R21, R22 = 0 Ω (size 0402),
T1, T2 = TC4-1W+ (Mini-Circuits®)
C17 = 22 pF (size 0402)
R1, R2 = 910 Ω (size 0402)
VCC
VCC
VCC
VCC
VCC
VCC
VCC
RFIN2
AGND
BLK
VPOS
RED
VCC
ADL5812