Data Sheet HMC1121
Rev. 0 | Page 5 of 15
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
22
2
1
4
5
3
12
11
NIC
NIC
NIC
NIC
RFIN
6
7
NIC
NIC
8NIC
9
10
NIC
NIC
NIC
NIC21
23
V
REF
24
V
DET
25 NIC
26
RFOUT
27
NIC
28 NIC
29 NIC
30
NIC
NIC
NIC
15
V
DD3
14
V
GG3
13NIC
16NIC
17
V
GG4
18NIC
19
20
V
DD4
NIC
32
31
V
DD2
NIC
33 NIC
34
V
GG
35 NIC
36
V
DD1
37
V
GG1
38 NIC
39
40
NIC
NIC
HMC1121
TOP VIEW
(Not to Scale)
NOTES
1. NIC = NO INTERNAL CONNECTION.
2. EXPOSED PAD. EXPOSED PAD MUST BE
CONNECTED TO THE RF/DC GROUND.
13529-002
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 to 4, 6 to 13, 16, 18, 20
to 22, 25, 27 to 31, 33, 35,
38 to 40
NC
No Internal Connection. These pins and exposed ground pad must be connected to RF/dc
ground.
5 RFIN
RF Input. This pin is ac-coupled and matched to 50 Ω. See Figure 3 for the RFIN interface
schematic.
14, 17, 34, 37
V
GG3
, V
GG4
,
V
GG2
, V
GG1
Gate Controls for the Amplifier. Adjust V
GG1
through V
GG4
to achieve the recommended bias
current. External bypass capacitors of 100 pF, 10 nF, and 4.7 μF are required. See Figure 5 for the
V
GG1
to V
GG4
interface schematic.
15, 19, 32, 36
V
DD3
, V
DD4
,
V
DD2
, V
DD1
Drain Biases for the Amplifier. External bypass capacitors of 100 pF, 10 nF, and 4.7 μF are required.
See Figure 8 for the V
DD1
to V
DD4
interface schematic.
23 V
REF
Voltage Reference. This pin is the dc bias of the diode biased through the external resistor and is
used for the temperature compensation of V
DET
. See Figure 7 for the V
REF
interface schematic.
24 V
DET
Voltage Detection. This pin is the dc voltage representing the RF output power rectified by the
diode that is biased through an external resistor. See Figure 4 for the V
DET
interface schematic.
26 RFOUT
RF Output. This pin is ac-coupled and matched to 50 Ω. See Figure 6 for the RFOUT interface
schematic.
EPAD Exposed Pad. The exposed pad must be connected to RF/dc ground.