參數(shù)資料
型號: OL2300NHN
廠商: NXP SEMICONDUCTORS
元件分類: 通信及網(wǎng)絡
英文描述: Fractional-N PLL based transmitter
中文描述: SPECIALTY TELECOM CIRCUIT, PQCC16
封裝: 3 X 3 MM, 0.85 MM HEIGHT, LEAD FREE, PLASTIC, MO-220, SOT758-1, VQFN-16
文件頁數(shù): 4/46頁
文件大?。?/td> 951K
代理商: OL2300NHN
OL2300
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 2 — 28 October 2010
4 of 46
NXP Semiconductors
OL2300
Fractional-N PLL based transmitter
6. Functional description
6.1 Functional blocks overview
6.1.1
Power management, voltage regulator
The supply voltage source is connected between pin V
DD
and the pins V
SS
, V
SSA
and
V
SS(PA)
.
An integrated low-dropout voltage regulator is used to supply the PLL and the PA-driver
with a reduced, regulated voltage. This helps keep the current consumption and the
supply voltage dependencies of the PLL as low as possible. The output of this regulator is
pin VREG which must be connected to an external blocking capacitor in order to
guarantee stability of the regulator. A recommended set-up is shown in
Figure 23
.
Two different regulator modes are available. For a detailed description see
Section 6.4.6
.
Pin V
DDA
is the positive supply voltage of the analog part of the PLL and pin V
DDD(PA)
is
the positive digital supply of the PLL prescaler and the PA-driver stage. Both pins should
be connected to pin VREG.
Fig 3.
Power management
001aak381
/64...71
BIAS
PFD
CP
AND
LPF
VCO
RF-POWER
AMPLIFIER
fracN-PLL
Ref
VREF
VDD
VCO
CRYSTAL
OSCILLATOR
V
SS(PA)
V
SSA
V
SS
V
DDD(PA)
VREG
V
DD
V
DDA
PAOUT
REGULATOR
ENRAD
0
0
1
1
0
ENXR
TXON
1
1
0
0
1
TXON
CASC
PLLEN
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