HMC703LP4E datasheet(9/52 Pages) HITTITE

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HMC703LP4E

v00.0311

8 GHZ FRACTIONAL SYNTHESIZER

For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

978-250-3343 • 978-250-3373 fax • Order On-line at www.hittite.com

Application Support: pll@hittite.com

Table 2. Pin Descriptions

Pin Number

Function

Description

SCK

CMOS Input: Serial port clock

SDI

CMOS Input: Serial port data

DVDD

Power Supply for digital - Nominal 3.3 V MAX 25 mA, fPD dependent

VDDIO

Power Supply for Digital IO - 3.3 V, 8 mA MAX (only when driving LD_SDO)

LD_SDO

CMOS Output: General Purpose Output - Lock Detect, Serial Data Out, others, Selectable

TRIG

CMOS Input : External Trigger pin.

N/C

No Connect

VCCPS

Power Supply for RF Divider, Nominal 3.3 V 35 mA MAX

N/C

No Connect

VCOIP

Differential RF Inputs. Normally AC Coupled, 2 V DC bias generated internally. For Single Ended

operation, RFN must be AC coupled to the ground plane, typically 100 pF ceramic. DC Bias of 2.3 V is

generated internally

VCOIN

VCCHF

Power Supply for RF Buffer, Nominal 3.3 V, 6 mA MAX

VDDLS

Power Supply for PFD to CP Level Shifters, Nominal 5 V, 5 mA MAX, fPD dependent.

VPPCPA

Power Supply for charge pump, Nominal 5 V, 10 mA MAX

Charge pump output

AVDD

Power supply for analog bias generation, Nominal 3.3 V, 2 mA MAX

BIAS

External bypass decoupling for precision bias circuits, 1.920 V +/-2 mV

NOTE: BIAS ref voltage cannot drive an external load. Must be measured with 10 GΩ meter such as

Agilent 34410A, normal 10 MΩ DVM will read erroneously.

RVDD

Power Supply for Reference path, Nominal 3.3 V. 15 mA MAX reference dependent

N/C

No Connect

XREFP

Reference Input. DC bias is generated internally. Normally AC coupled externally.

VDDPD

Power Supply for phase detector. Nominally 3.3 V. Decoupling for this supply is critical. 5 mA MAX, fPD

dependent

N/C

No Connect

CEN

CMOS Input: Hardware Chip Enable

SEN

CMOS Input: Serial port latch enable

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