DATA SHEET • SKY73100-11 VCO/SYNTHESIZER

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

200361B • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • April 15, 2009

5

Table 4. Load Register Word 0 (Programs the Operation Mode Register) (1 of 2)

Parameter

Function

State Description

Recommended

Operational Value

(Binary)

wd_0, wd_1

Address bits [1:0]. Must be set to 00b (see

Table 3)

00

cp_output

Charge pump setting [4:2]

Bits [4:2]:

0 0 0 = 200

µA

0 0 1 = 400

µA

0 1 0 = 600

µA

0 1 1 = 800

µA

1 0 0 = 1000

µA

1 0 1 = 1200

µA

1 1 0 = 1400

µA

1 1 1 = 1600

µA

Application

dependent

cp_delay

Charge pump delay [6:5]

Bits [6:5]:

0 0 = 2 nsec

0 1 = 4 nsec

1 0 = 7 nsec

1 1 = 9 nsec

NOTE: this device is fixed at 2 nsec.

00

pd_polar

Polarity of phase detector [7]

Bit [7]:

0 = Negative

1 = Positive

NOTE: this device is fixed at negative polarity.

0

cp_tristate

Tri-state selection for the transmit PLL

charge pump output [8]

Bit [8]:

0 = Charge pump in normal functional mode

1 = Charge pump disabled/tri-stated

0

rsvd

Reserved [9]

Reserved

0

sd_sel

Internal operating voltage control bit for

Σ∆

synthesizer [10]

Note: this bit needs to be programmed

together with bits [11] and [12].

Bit [12] Bit [11] Bit [10]: N-Cntr/R1-Divider

ΣΔ Mod

Voltage

Voltage

0

X

X

=

0 V

0 V

1

0

0

=

1.8 V

1.8 V

1

0

1

=

1.8 V

2.4 V

1

1

0

=

2.4 V

1.8 V

1

1

1

=

2.4 V

2.4 V

100

nr_sel

Internal operating voltage control bit for N-

counter and R1 divider [11]

See sd_sel parameter (bit [10])

This bit needs to be programmed together with bits [10] and [12].

–

pll_en

Internal operating voltage control bit for PLL

[12]

See sd_sel parameter (bit [10])

This bit needs to be programmed together with bits [10] and [11].

–

ref_bw_sel

Reference buffer bandwidth [14:13]

Bits [14:13]:

0 0 = 20 MHz

0 1 = 30 MHz

1 0 = 40 MHz

1 1 = 50 MHz

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