ADRF6702 1200 MHz TO 2400 MHz Quadrature Modulator with 1550 MHz TO 2150 MHz Fractional-N PLL & Integrated VCO

The ADRF6702 provides a quadrature modulator and synthesizer solution within a small 6 mm × 6 mm footprint while requiring minimal external components.

The ADRF6702 is designed for RF outputs from 1200 MHz to 2400 MHz. The low phase noise VCO and high performance quadrature modulator make the ADRF6702 suitable for next generation communication systems requiring high signal dynamic range and linearity. The integration of the IQ modulator, PLL, and VCO provides for significant board savings and reduces the BOM and design complexity.

The integrated fractional-N PLL/synthesizer generates a 2× fLO input to the IQ modulator. The phase detector together with an external loop filter is used to control the VCO output. The VCO output is applied to a quadrature divider. To reduce spurious components, a sigma-delta (Σ-Δ) modulator controls the programmable PLL divider.

The IQ modulator has wideband differential I and Q inputs, which support baseband as well as complex IF architectures. The single-ended modulator output is designed to drive a 50 Ω load impedance and can be disabled.

The ADRF6702 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, exposed-paddle, Pb-free, 6 mm × 6 mm LFCSP package. Performance is specified from −40°C to +85°C. A lead-free evaluation board is available.

Applications

Cellular communications systems
Broadband wireless access systems
Satellite modems

Features and Benefits

IQ modulator with integrated fractional-N PLL
Output frequency range: 1200 MHz to 2400 MHz
Internal LO frequency range: 1550 MHz to 2150 MHz
Output P1dB: 13.1 dBm @ 2140 MHz
Output IP3: 29.1 dBm @ 2140 MHz

Noise floor: −159.6 dBm/Hz @ 1960 MHz
Baseband bandwidth: 750 MHz (3 dB)
SPI serial interface for PLL programming
Integrated LDOs and LO buffer
Power supply: 5 V/240 mA
40-lead 6 mm × 6 mm LFCSP

Data Sheets

Document	note
ADRF6702: 1200 MHz to 2400 MHz Quadrature Modulator with 1550 MHz to 2150 MHz Frac-N PLL and Integrated VCO Data Sheet (Rev. B)	PDF 1645 kB

Application Notes

Document	note
AN-1100: Wireless Transmitter IQ Balance and Sideband Suppression (Rev. 0)	PDF 185 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADRF6702ACPZ-R7 Production	40 ld LFCSP (6x6mm w/4.1mm pad)	REEL 750	-40 to 85C	7.75	7	Y

Evaluation Boards

Part Number	Description	Price	RoHS
ADRF6702-EVALZ	Evaluation Board	150	Y
EVAL-CN0243-EB1Z	Interfacing the ADL670x family of IQ Modulators with integrated PLL to the AD9122 Dual LVDS DAC and AD9516 Clock Generator	595	Y