Datasheet > SKY73126-31

SKY73126-31

更新时间： 2024-01-18 14:05:03

品牌	Logo	应用领域
思佳讯 - SKYWORKS		/
页数	文件大小	规格书
14页	267K
描述
161.92 MHz High Performance VCO/Synthesizer

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技术参数
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SKY73126-31 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.84
Base Number Matches：	1

SKY73126-31 数据手册

DATA SHEET • SKY73126-31 VCO/SYNTHESIZER

Table 7. Word 3: Frequency Control Hold Register (2 of 2)

Parameter

Function

State Description

Recommended

Operational Value

(Binary)

Default Value

(Binary)

cp_delay

Charge pump delay [23:21]

Bits [23:21]:

000

0 0 0 = 0.5 ns

0 0 1 = 0.7 ns

0 1 0 = 0.9 ns

0 1 1 = 1.2 ns

1 0 0 = 1.4 ns

1 0 1 = 1.7 ns

1 1 0 = 2.0 ns

1 1 1 = 3.0 ns

rsvd

Reserved [31:24]

Reserved

00000000

CLK

D31=1 D30=x

D4=x

D3=0

D2=0

D1=0

D0=0

DATA

tdout

ID31

Default

ID30

ID1

ID0

Default

S1193

Figure 5. Vendor ID Read-Back Timing Diagram

D31 D30 D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Figure 6. Vendor ID Read-Back Initialization Word

VCO Prescalers

prescaler (8 or 16); the A-counter determines the counts using the

upper division ratio (9 or 17).

The VCO prescalers divide the VCO output signal by either 16/17

or 8/9. The modulus control signal from the N-counter determines

whether to divide by 16 or 17 in 16/17 mode, or whether to divide

by 8 or 9 in 8/9 mode. The prescaler mode is determined by

bit [17] of Word 1 (Operation Mode Register). The maximum

prescaler input frequency is 2000 MHz for 8/9 mode, and

3100 MHz for 16/17 mode.

The value of the N-counter is determined by the equation:

(M × P) + A

where M and A are the values of the M-counter and A-counter,

and P = 8 for 8/9 mode or 16 for 16/17 mode.

In 16/17 mode, the M-counter (bits [11:0]) value is determined by

the 12 highest order bits of the N-counter (bits [15:4]). The A-

counter value (bits [3:0]) is determined by the 4 lowest order bits

of the N-counter (bits [3:0]).

N-Counter

The N-counter consists of two asynchronous ripple counters, a

12-bit M-counter and a 4-bit A-counter. The M-counter

determines the counts using the lower division ratio in the

In 8/9 mode, the M-counter value is determined by bits [14:3] of

the N-counter and the A-counter value is determined by the three

lowest order bits of the N-counter (bits [2:0]). In this case, bit [15]

of the N-counter is always cleared.

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

201112C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • February 24, 2010

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