GENERAL DESCRIPTION

The ADMV4630 is a Ku band upconverter optimized for various

satellite communication (SATCOM) user terminals that operate in

the 14.0 GHz to 14.5 GHz frequency range.

The ADMV4630 local oscillator (LO) signal is generated internally

via the on-chip Integer N (INT) synthesizer. The internal synthesizer

enables LO frequency coverage from 8.7 GHz to 10.7 GHz. The

input intermediate frequency (IF) signals from 3 GHz to 5 GHz are

upconverted to an RF of 14.0 GHz to 14.5 GHz. The chip includes

filtering to attenuate both the LO feedthrough and unwanted lower

sideband. The chip also includes a digital step attenuator at the

IF input to provide up to 31 dB of gain control range with 1 dB

steps to adjust for preceding cable losses. The transmitter output is

automatically muted if the synthesizer becomes unlocked.

The digital serial peripheral interface (SPI) allows fast frequency

and gain programming. In addition to the digital SPI control, an

analog control pin (TX_MUTE) quickly powers down all circuits and

places the receiver in standby mode for power saving. Another

analog general-purpose input/output (AGPIO) pin can be used

either as an input to be read by the on-chip analog-to-digital

converter (ADC), or as an analog output for proportional to absolute

temperature (PTAT) voltages. There are also three digital GPIO

pins that output logic levels to control external devices using the

SPI.

The ADMV4630 upconverter comes in a compact, thermally enhanced,

6 mm × 6 mm, 40-lead lead frame chip scale package

(LFCSP). The ADMV4630 operates over the −40°C to +85°C case temperature range.

FEATURES

► IF to Ku band upconverter with integrated PLL

► RF output frequency range: 14.0 GHz to 14.5 GHz

► Internal LO frequency range: 8.7 GHz to 10.7 GHz

► Noise floor density: <−140 dBm/Hz

► Matched 50 Ω single-ended RF output and IF input

► On-chip power detector

► On-chip ADC

► Provides transmitter synthesizer lock detect

► Programmable at 20 MHz via 4-wire SPI interface

► Transmitter mute function

► 40-lead, 6 mm × 6 mm LFCSP package

APPLICATIONS

► SATCOM user terminals