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HMC836LP6CE

FRACTIONAL-N SYNTHESIZER WITH INTEGRATED VCO, 3365 - 3705 MHz

Hittite Microwave 

v06.1010

HMC836LP6CE

FRACTIONAL-N SYNTHESIZER WITH

INTEGRATED VCO, 3365 - 3705 MHz

General Description

The HMC836LP6CE 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 x2

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 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 HMC836LP6CE from the “Search by Part

Number” pull down menu.

Electrical Specifications, TA = +25° C

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

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

Parameter

RF Output Characteristics

VCO Frequency

RF Output Frequency at fVCO x2

RF Output Power at fVCO x2

VCO Tuning Sensitivity

VCO Supply Pushing

RF Output 2nd Harmonic

RF Output 3rd Harmonic

RF Output 4th Harmonic

RF Divider Characteristics

19-Bit N-Divider Range (Integer)

19-Bit N-Divider Range (Fractional)

REF Input Characteristics

Ref Input Frequency

Ref Input Range

Ref Input Capacitance

14-Bit R-Divider Range

Phase Detector (PD)

PD Frequency Fractional Feedback Mode

PD Frequency Fractional Feedforward

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

PD Frequency Integer Mode

Condition

Measured at 2 GHz, 2V

Measured at 2 GHz, 2V

Max = 219 - 1

Fractional nominal divide ratio

varies (-3 / +4) dynamically max

Synthesizer phase noise can

degrade by about 5dB when oper-

ating with a reference frequency

near the low end of this range.

AC Coupled

[1]

[1]

[1]

Min.

1682.5

3365

-1

-2

16

20

10

1.5

1

0.1

0.1

0.1

Typ.

Max.

Units

1852.5

MHz

3705

MHz

6

9

dBm

15

MHz/V

1.5

MHz/V

-25

dBc

-23

dBc

-31

dBc

524,287

524,283

50

200

MHz

2

3.3

Vpp

5

pF

16,383

100

MHz

80

MHz

125

MHz

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.

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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