RF5176 RF Micro Devices, RF5176 Datasheet - Page 3

• Manufacturer Part Number: RF5176
• Description: 3V W-CDMA POWER 1900MHZ/ 3V LINEAR POWER AMPLIFIER
• Manufacturer: RF Micro Devices

Rev A0 010910
Base
Pkg
Preliminary
Pin
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
BIAS GND
VCC BIAS
Function
RF OUT
RF OUT
RF OUT
VREG1
VREG2
VCC1
VCC1
RF IN
GND
Q1B
VS2
NC
NC
NC
NC
NC
NC
NC
NC
Description
Bias control for the first stage. Needs to be divided down from its nomi-
nal value of 2.5V using a resistive divider network of 240k
360k . V
a given output power. Alternative V
defined on the application schematic.
Supply for bias circuits.
Bias control for the second stage. Needs to be divided down from its
nominal value of 2.5V using a resistive divider network of 240k
240k . Alternative V
cation schematic.
Second stage bias circuit source. For best linearity, decouple with
bypassing capacitors of 15pF and 100nF.
Connect to ground plane via a 15nH inductor. DC return for the second
stage bias circuit.
Not currently used.
Not currently used.
RF output and power supply for the final stage. This is the unmatched
collector of the final stage. It requires an output matching network,
including a DC blocking capacitor.
Same as pin 8.
Same as pin 8.
Not currently used.
Power supply for the first stage and interstage match. Requires a shunt
capacitor of 12pF close to the pin for optimum match.
Same as pin 12.
Not currently used.
Not currently used.
RF input. Requires a blocking capacitor and shunt inductor to provide
2:1 VSWR.
Not currently used.
Base bias for first stage. For best linearity, decouple with 15pF and
100nF capacitors.
Not currently used.
Not currently used.
Ground connection. The backside of the package should be soldered
to a top side ground pad which is connected to the ground plane with
multiple vias. The pad should have a short thermal path to the ground
plane.
REG1
and V
REG
REG2
voltages can be used as defined on the appli-
may be adjusted to minimize idle current for
REG
voltages can be used as
and
and
Interface Schematic
RF5176
2-199
2