For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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

22

HMC702LP6CE

v10.0812

14 GHz 16-BIT FRACTIONAL-N PLL

Soft Reset

all other digital, including the fractional modulator, may be reset with an SPi write to strobe global_swrst_dig

Hardware Reset

the SPi registers may also be hardware reset by holding rStB, pin 19, low.

Power Down

should draw less than 10ua. it should be noted that Reg01h is the Enable and reset register which controls 16

separate functions in the chip. Depending upon the desired mode of operation of the chip, not all of the functions

may be enabled when in operation. Hence power up of the chip requires a selective write to Reg01 bits. an easy way

to return the chip to its prior state after a power down is to first read Reg01h and save the state, then write a zero to

Reg01h for reset and then simply rewrite the previous value to restore the chip to the desired operating mode.

CW Sweeper Mode

the HMc702LP6cE features a built in frequency sweeper function. this function supports external or automatic

triggered sweeps. the maximum sweep range is limited to 510 x Fxtal/r. For example, with a 10 MHz comparison

frequency, the maximum sweep range is 5100 MHz. the start and end frequency points must be within 5100 MHz of

one another. For sweep operation the Delta-Sigma Modulator mode should be Feed Forward (register 12h Bits [9:8]

= 11) otherwise discontinuities may occur when crossing integer-n boundaries (harmonic multiples of the comparison

frequency).

Sweeper Modes include:

a. 2-Way Sweep Mode: alternating positive and negative frequency ramps.

b. 1-Way Sweep Mode

c. Single Step ramp Mode

applications include test instrumentation, FMcW sensors, automotive radars and others. the parameters of the

series of discrete frequency values, which may be

a. Stepped by an automatic sequencer, or

b. Single stepped by individual triggers in Single Step Mode.

triggering of each sweep, or step, may be configured to operate:

a. Via a serial port write to Reg14h<2> ramp_trigg (if reg 14h<2> = 0 )

b. automatically generated internally,

c. triggered via ttL input on GPo3 reg14h<5> = 1.

Sweep parameters are set as follows:

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