Data Sheet

HMC521ALC4

Rev. 0 | Page 5 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

13

1

3

4

2

NIC

NIC

GND

RF

5

6

GND

NIC

NIC

14 GND

15 LO

16 GND

17 NIC

18 NIC

NOTES

1. NIC = NOT INTERNALLY CONNECTED.

THESE PINS ARE NOT CONNECTED INTERNALLY.

2. EXPOSED PAD. THE EXPOSED PAD MUST BE

CONNECTED TO THE GND PIN.

HMC521ALC4

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration 7

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 2, 6 to 8, 10,

13, 17 to 24

NIC

Not Internally Connected. These pins are not connected internally.

3, 5, 12, 14, 16

GND

Ground. These pins and package bottom must be connected to RF and dc ground. See Figure 3 for the

GND interface schematic.

4

RF

Radio Frequency Port. This pin is ac-coupled and matched to 50 Ω. See Figure 6 for the RF interface

schematic.

9

IF1

First Quadrature Intermediate Frequency Port. This pin is dc-coupled. For applications not requiring

operation to dc, dc block this port externally using a series capacitor of a value chosen to pass the

necessary IF frequency range. For operation to dc, these pins must not source or sink more than 2 mA of

current. Otherwise, die malfunction or die failure may result. See Figure 5 for the IFx interface schematic.

11

IF2

Second Quadrature Intermediate Frequency Port. This pin is dc-coupled. For applications not requiring

operation to dc, dc block this port externally using a series capacitor of a value chosen to pass the

necessary IF frequency range. For operation to dc, these pins must not source or sink more than 2 mA of

current. Otherwise, die malfunction or die failure may result. See Figure 5 for the IFx interface schematic.

15

LO

Local Oscillator Port. This pin is ac-coupled and matched to 50 Ω. See Figure 4 for the LO interface

schematic.

EPAD

Exposed Pad. The exposed pad must be connected to the GND pin.

INTERFACE SCHEMATICS

GND

Figure 3. GND Interface Schematic

LO

Figure 4. LO Interface Schematic

IFx

Figure 5. IFx Interface Schematic

RF

Figure 6. RF Interface Schematic