For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

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General Description

The HMC820LP6CE is a fully functioned Fractional-N Phase-Locked-Loop (PLL) Frequency Synthesizer with an

Integrated Voltage Controlled Oscillator (VCO). The synthesizer consists of an integrated low noise VCO with a tri-

band output, an autocalibration subsystem for low voltage VCO tuning, a very low noise digital Phase Detector (PD),

a precision controlled charge pump, a low noise reference path divider and a fractional divider.

The fractional synthesizer features an advanced delta-sigma modulator design that allows both ultra-fine step sizes

and low spurious products. The phase detector (PD) features cycle slip prevention (CSP) technology to allow faster

frequency hopping times. Ultra low in-close phase noise and low spurious also allows wider loop bandwidths for faster

frequency hopping and low micro-phonics.

For theory of operation and register map refer to the “PLLs w/ Integrated VCOs - RF VCOs Operating Guide”. To

view the Operating Guide, please visit www.hittite.com and choose HMC820LP6CE from the “Search by Part

Number” pull down menu.

HMC820LP6CE

v05.1010

FRACTIONAL-N SYNTHESIZER w/ INTEGRATED VCO

1095 - 1275, 2190 - 2550, 4380 - 5100 MHz

Parameter

Condition

Min.

Typ.

Max.

Units

RF Output Characteristics

VCO Frequency at PLL Input

4380

5100

MHz

1095

1275

MHz

2190

2550

MHz

4380

5100

MHz

7.5

10

12.5

dBm

3

6.5

10

dBm

-9

-4

1

dBm

VCO Tuning Sensitivity

Measured at fo, 2V

12

16

24

MHz/V

VCO Supply Pushing

Measured at fo, 2V

-2

1.5

MHz/V

RF Output fo/2 Harmonic

Doubler Mode

-22

-18

dBc

RF Output 3fo/2 Harmonic

Doubler Mode

-50

-41

dBc

RF Output 2nd Harmonic

fo/2/fo/2fo

-25 / -30 / -42 -20 / -19 / -36

dBc

RF Output 5fo/2 Harmonic

Doubler Mode

-60

-56

dBc

RF Output 3rd Harmonic

fo/2/fo/2fo

-27 / -40 / -60 -24 / -30 / -51

dBc

RF Output 7fo/2 Harmonic

Doubler Mode

-65

-61

dBc

RF Output 4th Harmonic

fo/2/fo/2fo

-30 / -50 / -68 -25 / -42 / -62

dBc

RF Divider Characteristics

19-Bit N-Divider Range (Integer)

524,287

19-Bit N-Divider Range (Fractional)

Fractional nominal divide ratio

varies (-3 / +4) dynamically max

524,283

REF Input Characteristics

Max Ref Input Frequency

Synthesizer phase noise can

degrade by about 5 dB when

operating with a reference

frequency near the low end of

this range.

10

50

200

MHz

Ref Input Range

AC Coupled

1

2

3.3

Vp-p

Ref Input Capacitance

5

pF

14-Bit R-Divider Range

1

16,383

VPPCP, VDDCP, VCC1, VCC2 = 5V ±4%; RVDD, AVDD, DVDD3V, VCCPD, VCCHF, VCCPS =

3.3V ±6% GNDCP = GNDLS = Ground Paddle = 0V