F1456 Datasheet | IDT

Description The F1456 is a High Gain / High Linearity 2100 MHz to 2950 MHz TX Digital Variable Gain Amplifier used in transmitter applications. The F1456 TX DVGA provides 32.1 d B maximum gain with +38 d Bm OIP3 and 3.9 d B noise figure. Up to 31.5 d B gain control is achieved using the bination of a digital step attenuator (DSA) and a KLINTM RF Digital Gain Amplifier. This device uses a single 5 V supply and 215 m A of ICC. This device is packaged in a 6 mm x 6 mm, 28-pin QFN with 50 Ω single-ended RF input and RF output impedances for ease of integration into the signal-path. petitive Advantage In typical Base Stations, RF VGAs are used in the TX traffic paths to drive the transmit power amplifier. The F1456 TX DVGA offers very high reliability due to its construction from a monolithic silicon die in a QFN package. The F1456 is configured to provide an optimum balance of noise and linearity performance consisting of a KLINTM RF amplifier, digital step attenuator (DSA) and a PA driver amplifier. The KLINTM amplifier maintains the OIP3 and output P1d B performance over an extended attenuation range when pared to petitive devices. Typical Applications - Multi-mode, Multi-carrier Transmitters - Wi MAX and LTE Base Stations - UMTS/WCDMA 3G Base Stations - PHS/PAS Base Stations - Public Safety Infrastructure Features - Broadband 2100 MHz to 2950 MHz - 32.1 d B max gain - 3.9 d B NF @ max gain (2650 MHz) - 31.5 d B total gain control range, 0.5 d B step - < 2 d B overshoot between gain transitions - Maintains flat +21.5 d Bm OP1d B for more than 13 d B gain adjustment range - Maintains flat +38 d Bm OIP3 for more than 15 d B gain adjustment range - SPI interface for DSA control - Single 5 V supply voltage - ICC = 215 m A - Up to +105 °C TCASE operating temperature - 50 Ω input and output impedance - Standby mode for power savings - Pin patible 700 MHz and 2100 MHz versions - 6 mm x 6 mm, 28-pin QFN package Block Diagram Figure 1. Block Diagram RF IN KLIN Constant High Linearity...