Fractional-N PLL with Integrated VCO
25 MHz to 3000 MHz
HMC832
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
LD/SDO SCK SDI
RF bandwidth:
25 MHz to 3000 MHz
3.3 V supply
HMC832
LOCK
DETECT
Maximum phase detector rate: 100 MHz
Ultralow phase noise
SPI
SEN
PROGRAMMING
INTERFACE
CONTROL
CAL
−110 dBc/Hz in band, typical
Fractional figure of merit (FOM): −226 dBc/Hz
24-bit step size, resolution 3 Hz typical
Exact frequency mode with 0 Hz frequency error
Fast frequency hopping
EN
MODULATOR
RF_P
RF_N
EN
÷1, 2, 4, 6, ...62
40-lead 6 mm × 6 mm SMT package: 36 mm2
APPLICATIONS
÷N
VCO
Cellular infrastructure
Microwave radio
CP
CP
PFD
VTUNE
÷R
WiMax, WiFi
Communications test equipment
CATV equipment
XREFP
DDS replacement
Military
Figure 1.
Tunable reference source for spurious-free performance
GENERAL DESCRIPTION
The HMC832 is a 3.3 V, high performance, wideband, frac-
tional-N, phase-locked loop (PLL) that features an integrated
voltage controlled oscillator (VCO) with a fundamental
frequency of 1500 MHz to 3000 MHz, and an integrated VCO
output divider (divide by 1/2/4/6/…60/62), that enables the
HMC832 to generate continuous frequencies from 25 MHz to
3000 MHz. The integrated phase detector (PD) and delta-sigma
(Δ-Σ) modulator, capable of operating at up to 100 MHz, permit
wider loop bandwidths and faster frequency tuning with
excellent spectral performance.
The HMC832 is footprint-compatible to the market leading
HMC830 PLL with integrated VCO. It features 3.3 V supply and
an innovative programmable performance technology that enables
the HMC832 to tailor current consumption and corresponding
noise floor performance to individual applications by selecting
either a low current consumption mode or a high performance
mode for an improved noise floor performance.
Additional features of the HMC832 include 12 dB of RF output
gain control in 1 dB steps; output mute function to automatically
mute the output during frequency changes when the device is
not locked; selectable output return loss; programmable
differential or single-ended outputs, with the ability to select
either output in single-ended mode; and a Δ-Σ modulator exact
frequency mode that enables users to generate output frequencies
with 0 Hz frequency error.
Industry leading phase noise and spurious performance, across
all frequencies, enable the HMC832 to minimize blocker effects,
and to improve receiver sensitivity and transmitter spectral
purity. A low noise floor (−160 dBc/Hz) eliminates any contri-
bution to modulator/mixer noise floor in transmitter applications.
Rev. A
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