ADF4360-2BCPRL

更新时间： 2024-02-16 21:57:10

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ADF4360-2BCPRL 数据手册

PRELIMINARY TECHNICAL DATA

ADF4360-2

CIRCUIT DESCRIPTION

REFERENCE INPUT SECTION

A AND B COUNTERS

The A and B CMOS counters combine with the dual modulus

prescaler to allow a wide ranging division ratio in the PLL

feedback counter. The counters are specified to work when

the prescaler output is 300MHz or less. Thus, with an VCO

frequency of 2.5GHz, a prescaler value of 16/17 is valid but a

value of 8/9 is not valid.

The Reference Input stage is shown below in Figure 2. SW1

and SW2 are normally-closed switches. SW3 is normally-

open. When Powerdown is initiated, SW3 is closed and SW1

and SW2 are opened. This ensures that there is no loading of

the REF_INpin on powerdown.

Pulse Swallow Function

The A and B counters, in conjunction with the dual modulus

prescaler make it possible to generate output frequencies

which are spaced only by the Reference Frequency divided

by R . The equation for the VCO frequency is as follows:

Powerdown

Control

f_VCO= [(P x B) + A] x f_REFIN/R

100k Ω

f_VCOOuput Frequency of voltage controlled oscillator

(VCO).

SW2

REF

To R Counter

Buffer

SW1

Preset modulus of dual modulus prescaler (8/9, 16/17,

etc.,).

SW3

Preset Divide Ratio of binary 13-bit counter (3 to

8191).

Preset Divide Ratio of binary 5-bit swallow

counter (0 to 31).

Figure 2. Reference Input Stage

f_REFINExternal reference frequency oscillator.

PRESCALER (P/P+1)

N = BP + A

The dual modulus prescaler (P/P+1), along with the A and B

counters, enables the large division ratio, N, to be realised (N

= BP + A). The dual-modulus prescaler, operating at CML

levels, takes the clock from the VCO and divides it down to a

manageable frequency for the CMOS A and B counters. The

prescaler is programmable. It can be set in software to 8/9,

16/17 or 32/33. It is based on a synchronous 4/5 core. There

is a minimum divide ratio possible for fully contiguous output

frequencies. This minimum is determined by P, the prescaler

value and is given by: (P²-P).

To PFD

13-BIT B

COUNTER

LOAD

PRESCALER

From VCO

P/P+1

LOAD

5-BIT A

COUNTER

Modulus

Control

N DIVIDER

Figure 3. A and B Counters

REV. PrA 07/03

–7–

1...4 5 678 9 10...20

中文翻译

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ADF4360-2BCPRL 替代型号

型号	品牌	替代类型	描述	数据表
ADF4360-2BCPRL7	ADI	完全替代	IC TELECOM, CELLULAR, BASEBAND CIRCUIT, QCC24, 4 X 4 MM, MO-220-VGGD-2, LFCSP-24, Cellular
ADF4360-2BCPZRL	ADI	类似代替	Integrated Synthesizer and VCO
ADF4360-2BCP	ADI	完全替代	Integrated Synthesizer and VCO

与ADF4360-2BCPRL相关器件

型号	品牌	获取价格	描述	数据表
ADF4360-2BCPRL7	ADI	获取价格	IC TELECOM, CELLULAR, BASEBAND CIRCUIT, QCC24, 4 X 4 MM, MO-220-VGGD-2, LFCSP-24, Cellular
ADF4360-2BCPRL7	ROCHESTER	获取价格	TELECOM, CELLULAR, BASEBAND CIRCUIT, QCC24, 4 X 4 MM, MO-220-VGGD-2, LFCSP-24
ADF4360-2BCPZ	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-2BCPZRL	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-2BCPZRL7	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-3	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-3BCP	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-3BCPRL	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-3BCPRL7	ADI	获取价格	Integrated Synthesizer and VCO
ADF4360-3BCPZ	ADI	获取价格	Integrated Synthesizer and VCO

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