參數(shù)資料
型號(hào)： TSA5059
廠商： NXP Semiconductors N.V.
英文描述： 2.7 GHz I2C-bus controlled low phase noise frequency synthesizer
中文描述： 2.7千兆赫的I2C控制的低相位噪聲頻率合成器總線
文件頁(yè)數(shù)： 5/24頁(yè)
文件大小： 151K
代理商： TSA5059
1999 Oct 05
5
Philips Semiconductors
Preliminary specification
2.7 GHz I
2
C-bus controlled low phase
noise frequency synthesizer
TSA5059
PINNING
SYMBOL
PIN
DESCRIPTION
CP
XTAL
XT/COMP
AS
SDA
SCL
P3
P2
P1
P0
ADC
V
CC
RFA
RFB
GND
VT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
charge pump output
crystal oscillator input
f
xtal
or f
comp
signal output
I
2
C-bus address selection input
I
2
C-bus serial data input/output
I
2
C-bus serial clock input
general purpose output Port 3
general purpose input/output Port 2
general purpose input/output Port 1
general purpose input/output Port 0
analog-to-digital converter input
supply voltage
RF signal input A
RF signal input B
ground supply
tuning voltage output
Fig.2 Pin configuration.
handbook, halfpage
1
2
3
4
5
6
7
8
9
10
11
12
13
16
15
14
CP
XTAL
XT/COMP
AS
SDA
GND
RFB
RFA
VCC
ADC
P0
P1
SCL
P3
P2
VT
TSA5059
FCE121
FUNCTIONAL DESCRIPTION
The TSA5059 contains all the necessary elements but a
referencesourceandaloopfiltertocontrolavaricaptuned
local oscillator forming a phase locked loop frequency
synthesized source. The IC is designed in a high speed
process with a fast phase detector to allow a high
comparison frequency to reach a low phase noise level on
the oscillator.
The block diagram is shown in Fig.1. The RF signal is
applied at pins RFA and RFB. Thanks to the input
preamplifier a good sensitivity is provided. The output of
the preamplifier is fed to the 17-bit programmable divider
either through a divide-by-two prescaler or directly.
Because of the internal high speed process, the RF divider
is working for a frequency up to 2.7 GHz, without the need
for the divide-by-two prescaler to be used. This prescaler
is present on chip for compatibility reasons with existing
circuits.
The output of the 17-bit programmable divider f
DIV
is fed
into the phase comparator, where it is compared in both
phase and frequency with the comparison frequency f
comp
.
This frequency is derived from the signal present at
pin XTAL, f
xtal
, divided down in the reference divider. It is
possible either to connect a quartz crystal to pin XTAL and
then using the on-chip crystal oscillator, or to feed this pin
with a reference signal from an external source.
The reference divider can have a dividing ratio selected
from 16 different values between 2 and 320, including the
ratio 24 to cope with the offset requirement of the UK-DTT
system, see Table 8.
The output of the phase comparator drives the
charge pump and the loop amplifier section. This amplifier
has an on-chip high voltage drive transistor which avoids
the use of an additional external component. Pin CP is the
output of the charge pump, and pin VT is the pin to drive
the tuning voltage to the varicap diode of the Voltage
Controlled Oscillator (VCO). The loop filter has to be
connected between pins CP and VT.
In addition, it is possible to drive another PLL synthesizer,
or the clock input of a digital demodulation IC, from the
pin XT/COMP. It is possible to select by software either
f
xtal
, the crystal oscillator frequency or f
comp
, the frequency
present after the reference divider at this pin. It is also
possible to switch off this output, in case it is not used.
For test and alignment purposes, it is possible to release
the tuning voltage output to be able to apply an external
voltage on it, to select one of the three charge pump test
modes, and to monitor half the f
DIV
at Port P0. See
Table 10 for all possible modes.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TSA5059A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2.7 GHz I2C-bus controlled low phase noise frequency synthesizer
TSA5059AT 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2.7 GHz I2C-bus controlled low phase noise frequency synthesizer
TSA5059AT/C2,518 制造商:NXP Semiconductors 功能描述:
TSA5059ATS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2.7 GHz I2C-bus controlled low phase noise frequency synthesizer
TSA5059ATS/C1,118 功能描述:鎖相環(huán) - PLL 2,7GHZI2C BUS RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
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