參數(shù)資料
型號： OL2300NHN
廠商： NXP SEMICONDUCTORS
元件分類： 通信及網(wǎng)絡(luò)
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)： 14/46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
14 of 46
NXP Semiconductors
OL2300
Fractional-N PLL based transmitter
If TXDATA is high then AMOUT is set and the amplitude is given by the content AML[3:0]
in register ACON2 and the settings of ASK0 and ASK1. If ‘D’ is cleared ASK0 located in
register ACON0 determines between ASK and FSK operation. Alternatively if “D” is set,
ASK1 is used. In both cases the selected ASK bit must be set to achieve amplitude
modulation. If the selected ASK bit is cleared, AMOUT is kept low and the carrier remains
unmodulated (used for FSK with continuous wave operation).
Table 11.
Bit 7
ASK0
R/W
Table 12.
Bit 7
ASK1
Table 13.
Bit 7
CASC
R/W
6.4.4
SASK, Soft ASK mode
A ‘soft’ modulation scheme is implemented in order to reduce the ASK modulation
bandwidth. The soft ASK shape is modelled by a linear interpolation approach.
Switching between the selected AMH and AML values is done in a linear way. The output
power is changed by switching the four binary weighted PA output stages with a
programmable timing configured with the bits RMP[6:0] of register MRCON (modulation
ramp control).
The value of RMP[6:0] specifies the number of reference clocks (derived from the crystal
frequency) between two consecutive power steps. Setting the bits RMP[6:0] to 0x0h
results in immediate change between the values AMH and AML (normal ASK mode).
Remark:
If bit XOSL in register TXCON is set, the reference clock applied to the SASK
ramp control is the crystal clock divided by a factor 2 and the ramp time is doubled.
Fig 11. ASK modulation timing
Address 0Ah; ACON0, ASK modulation control 0
Bit 6
Bit 5
X
X
-
-
Bit 4
X
-
Bit 3
AMH03
R/W
Bit 2
AMH02
R/W
Bit 1
AMH01
R/W
Bit 0
AMH00
R/W
Address 0Bh; ACON1, ASK modulation control 1
Bit 6
Bit 5
X
X
Bit 4
X
Bit 3
AMH13
Bit 2
AMH12
Bit 1
AMH11
Bit 0
AMH10
R/W
-
-
-
R/W
R/W
R/W
R/W
Address 0Ch; ACON2, ASK modulation control 2
Bit 6
Bit 5
ENRAD
ENPF
R/W
R/W
Bit 4
ENSDO
R/W
Bit 3
AML3
R/W
Bit 2
AML2
R/W
Bit 1
AML1
R/W
Bit 0
AML0
R/W
001aak389
AMOUT
AML
ACON
AMH
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