[AK1291]

MS-E-1148-02

2015/6

- 1 -

1.

Overview

AK1291 is a variable gain amplifier with a power detector. It’s operating frequency ranges from

90MHz to 300MHz. The gain control adopts an analog signal control, and the gain characteristic is

dB linear. The gain control range is -9dB to +21dB and a dynamic range is 30dB. AK1291 has

single-ended input and output, with impedance of 50 Ω. As a typical characteristic, NF is 7dB (at

maximum gain) , and IMD3 is 70dBc at output power of -15dBm ,at frequency of 165MHz.The

power supply voltage is 4.75V to 5.25V.

2.

Feature

▪Operation Frequency Range

90MHz to 300MHz

▪Gain variable range

-9dB to 21dB

▪Noise Figure

7dB @max gain

▪IMD3

70dBc @output power -15dBm

▪Supply Voltage

4.75V to 5.25V

▪Operating Temperature

-40°C to +85°C

▪Package

24pin QFN0404

3.

Block Diagram

Figure. 1 Block Diagram

IF Variable Gain Amplifier with RSSI

AK1291

RFINP

RFINN

GCON

PVDD

OAVDD

IAVDD

VSS3

ENAB

BIAS

COM

RFOUT

Buffer

Detector

DETIN

DETOUT

DETVDD

VSS1

VSS2

VSS4

VSS6

VSS5