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

7

7 - 2

General Description

The HMC826LP6CE 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 divide-

by-2 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 HMC826LP6CE from the “Search by Part

Number” pull down menu.

HMC826LP6CE

v04.1010

FRACTIONAL-N SYNTHESIZER WITH

INTEGRATED VCO, 990 - 1105 MHz

Parameter

Condition

Min.

Typ.

Max.

Units

RF Output Characteristics

VCO Frequency at PLL Input

1980

2210

MHz

990

1105

MHz

8

11

15

dBm

VCO Tuning Sensitivity

Measured at 2 GHz, 2V

15

MHz/V

VCO Supply Pushing

Measured at 2 GHz, 2V

-2

1.5

MHz/V

RF Output 2nd Harmonic

-25

dBc

RF Output 3rd Harmonic

-23

dBc

RF Output 4th Harmonic

-31

dBc

RF Output 5th Harmonic

-33

dBc

RF Divider Characteristics

19-Bit N-Divider Range (Integer)

16

524,287

19-Bit N-Divider Range (Fractional)

Fractional nominal divide ratio

varies (-3 / +4) dynamically max

20

524,283

REF Input Characteristics

Max Ref Input Frequency

Synthesizer phase noise can

degrade by about 5dB when

operating with a reference

frequency near the low end of

this range.

10

50

200

MHz

Ref Input Range

AC Coupled

1.5

2

3.3

Vpp

Ref Input Capacitance

5

pF

14-Bit R-Divider Range

1

16,383

Phase Detector (PD)

PD Frequency Fractional Feedback Mode

[1]

0.1

100

MHz

PD Frequency Fractional Feedforward Mode

(and Register 6 [17:16] = 10)

0.1

80

MHz

PD Frequency Integer Mode

[1]

0.1

125

MHz

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

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

Note 1: This maximum phase detector frequency can only be achieved if the minimum N value is respected. eg. In the case of fractional feedback

mode, the maximum PFD rate = fvco/20 or 100MHz, whichever is less.