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 HMC831LP6CE is a fully functioned Fractional-N Phase-Locked-Loop (PLL) with an Integrated Voltage Controlled

Oscillator (VCO). The PLL consists of an integrated low noise VCO, an autocalibration subsystem for low voltage VCO

tuning, a very low noise digital Phase Detector (PD), a precision cont-rolled charge pump, a low noise reference path

divider and a fractional divider.

The fractional PLL 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.

To view the Operating Guide, please visit www.hittite.com and choose HMC831LP6CE from the “Search by Part

Number” pull down menu.

HMC831LP6CE

v05.1211

FRACTIONAL-N PLL WITH

INTEGRATED VCO, 1815 - 2010 MHz

Parameter

Condition

Min.

Typ.

Max.

Units

RF Output Characteristics

VCO Frequency at PLL Input

Internal to the IC Only

1815

2010

MHz

1815

2010

MHz

4

7.5

11

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 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 5 dB when

operating with a reference

frequency near the low end of

this range.

10

50

200

MHz

Ref Input Range

AC Coupled

1.5

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 100 MHz, whichever is less.

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

For price, delivery, and to place orders: Analog Devices, Inc.,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106

Phone: 781-329-4700 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D