LTC6948 datasheet(2/38 Pages) AD

2 / 38 page

LTC6948

6948fa

For more information www.linear.com/LTC6948

pin conFiguraTion

absoluTe MaxiMuM raTings

Supply Voltages

V+ (VREF+, VRF+, VD+) to GND...............................3.6V

VCP+, VVCO+ to GND.............................................5.5V

Voltage on CP Pin .................GND – 0.3V to VCP+ + 0.3V

Voltage on all other Pins ...........GND – 0.3V to V+ + 0.3V

Operating Junction Temperature Range, TJ (Note 2)

LTC6948I ........................................... –40°C to 105°C

Junction Temperature, TJMAX................................ 125°C

Storage Temperature Range .................. –65°C to 150°C

(Note 1)

9 10

TOP VIEW

GND

UFD PACKAGE

28-LEAD (4mm

× 5mm) PLASTIC QFN

11 12 13

28 27 26 25 24

REF+

STAT

SCLK

SDI

SDO

LDO

VD+

BVCO

GND

CMA

CMB

CMC

GND

TUNE

TJMAX = 125°C, θJCbottom = 7°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

orDer inForMaTion

available opTions

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

JUNCTION TEMPERATURE RANGE

LTC6948IUFD-1#PBF

LTC6948IUFD-1#TRPBF

69481

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 105°C

LTC6948IUFD-2#PBF

LTC6948IUFD-2#TRPBF

69482

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 105°C

LTC6948IUFD-3#PBF

LTC6948IUFD-3#TRPBF

69483

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 105°C

LTC6948IUFD-4#PBF

LTC6948IUFD-4#TRPBF

69484

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 105°C

Consult LTC Marketing for parts specified with wider operating temperature ranges.

Consult LTC Marketing for information on nonstandard lead based finish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

VCO FREQUENCY

RANGE (GHz)

PACKAGE STYLE

OUTPUT FREQUENCY RANGE vs OUTPUT DIVIDER SETTING (GHz)

QFN-28 (UFD28)

0 DIV = 6

0 DIV = 5

0 DIV = 4

0 DIV = 3

0 DIV = 2

0 DIV = 1

2.240 to 3.740

LTC6948IUFD-1

0.373 to 0.623

0.448 to 0.748

0.560 to 0.935

0.747 to 1.247

1.120 to 1.870

2.240 to 3.740

3.080 to 4.910

LTC6948IUFD-2

0.513 to 0.818

0.616 to 0.982

0.770 to 1.228

1.027 to 1.637

1.540 to 2.455

3.080 to 4.910

3.840 to 5.790

LTC6948IUFD-3

0.640 to 0.965

0.768 to 1.158

0.960 to 1.448

1.280 to 1.930

1.920 to 2.895

3.840 to 5.790

4.200 to 6.390

LTC6948IUFD-4

0.700 to 1.065

0.840 to 1.278

1.050 to 1.598

1.400 to 2.130

2.100 to 3.195

4.200 to 6.390

Overlapping Frequency Bands

http://www.linear.com/product/LTC6948#orderinfo

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