Applications

• 3G/4G LTE Band 28 small cell

• Active distributed antenna system

• Cellular repeaters

• Driver amplifier

Features

• High gain: 37 dB (unconditionally stable)

• High linearity: +23 dBm with -50 dBc ACLR @ 85°C

(WCDMA Test Model 1 with 64 DPCH)

• RF input and output internally matched to 50 ohms

• Excellent output return loss: <-15 dB

• Integrated active bias: performance compensated over temp

• PA On/Off function: 4.0 μs switching time

• Integrated coupler for output power monitoring

• Single supply voltage: 3.3 V

• Minimal external components

• Pin-to-pin compatible PA family supporting all 3GPP bands

• Small 5 x 5 mm, 28-pin package

(MSL3, 260 °C per JEDEC J-STD-020)

Description

The SKY66188-11 is a high-linearity power amplifier (PA) with

fully matched input/output and high gain. The compact 5 x 5 mm

PA is designed for FDD 3G/4G LTE small cell base stations

operating from 758 to 803 MHz. The active biasing circuitry is

integrated to compensate PA performance over temperature,

voltage, and process variation as well as an internal coupler for

power monitoring.

The SKY66188-11 requires minimal external components and is

part of a high-linearity, pin-to-pin compatible PA family

supporting all 3GPP bands.

A block diagram of the SKY66188-11 is shown in Figure 1. The

device package and pinout for the 28-pin device are shown in

Figure 2. Table 1 lists the pin-to-pin compatible parts in the PA

family.