HMC787A Data Sheet
Rev. A | Page 16 of 17
APPLICATIONS INFORMATION
TYPICAL APPLICATION CIRCUIT
Figure 49 shows the typical application circuit for the HMC787A.
The LO and RF pins are internally ac-coupled. When IF operation
is not required until dc, it is recommended to use an ac-coupled
capacitor at the IF port. When IF operation to dc is required,
do not exceed the IF source and sink currents specified in the
Absolute Maximum Ratings section.
9
8
1
3
7
2
5
4
6
12
11
10
RF
LO
IF
13608-048
Figure 49. Typical Applications Circuit
EVALUATION PCB INFORMATION
The circuit board used in the application must use RF circuit
design techniques. Signal lines must have 50 Ω impedance, and
the package ground leads and exposed pad must be connected
directly to the ground plane similarly to that shown in Figure 50.
Use a sufficient number of via holes to connect the top and
bottom ground planes. The evaluation circuit board shown in
Figure 50 is available from Analog Devices, Inc., upon request.
Figure 50. Evaluation PCB Top Layer
Table 6. Bill of Materials for the EV1HMC787ALC3B Evaluation PCB
Quantity Reference Designator Part Number Description
1 117611-1 PCB, evaluation board
2 J1 to J2 104935 2.92 mm connectors, SRI
1 J3 105192 SMA connector, Johnson
1 U1 HMC787ALCB Device under test (DUT)
