STW81101AT datasheet(30/48 Pages) STMICROELECTRONICS

No. de pieza	STW81101AT

Descripción Electrónicos	Multi-band RF frequency synthesizer with integrated VCOs

PDF	48 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

Logo

30 / 48 page

I2C bus interface

STW81101

30/48

B_COUNTER

B[10:3]. Counter value (bit B11 in the previous register, bits B[2:0] in the next register)

A_COUNTER

Bits B[2:0] for B_COUNTER, A_COUNTER value.

REF_DIVIDER

Reference clock divider ratio R[9:1] (bits R1, R0 in the next register).

CONTROL

The CONTROL register is used to set the charge pump current, the VCO output voltage

amplitude and the prescaler modulus:

The LO output frequency is programmed by setting the proper values for A, B and R

according to the following formula:

MSB

LSB

B10

B9B8B7

B6B5B4

MSB

LSB

MSB

LSB

MSB

LSB

PLL_A1

PLL_A0

CPSEL2

CPSEL1

CPSEL0

PSC_SEL

PLL_A[1:0]:

VCO amplitude

CPSEL[2:0]:

charge pump output current

PSC_SEL:

prescaler modulus select ('0' for P=16, '1' for P=19)

where

DR equals

{

for direct output

0.5

for output divided by 2

0.25 for output divided by 4

OUT

()

REF

CLK

–

-----------------------------------

STW81101AT Datasheet(PDF) 30 Page - STMicroelectronics

STW81101AT Datasheet(HTML) 30 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Datasheet Descarga

Enlace URL