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U2733B-C 参数 Datasheet PDF下载

U2733B-C图片预览
型号: U2733B-C
PDF下载: 下载PDF文件 查看货源
内容描述: 分数N频率合成器的DAB调谐器 [Fractional-N Frequency Synthesizer for DAB Tuner]
分类和应用:
文件页数/大小: 14 页 / 150 K
品牌: TEMIC [ TEMIC SEMICONDUCTORS ]
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U2733B-C
Fractional-N Frequency Synthesizer for DAB Tuner
Description
The U2733B-C is a monolithically integrated
fractional-N frequency synthesizer circuit fabricated in
TEMIC’s advanced UHF5S technology. Designed for
applications in DAB receivers, it controls a VCO to
synthesize frequencies in the range of 70 to 500 MHz in
a 16 kHz raster; four different reference divide factors can
be selected. The lock status of the phase detector is
indicated at a special output pin, six switching outputs can
be addressed. An internal frequency doubler provides an
output signal having twice the frequency of the reference
oscillator. All functions of this IC are controlled by
I
2
C bus.
Features
D
Microprocessor controlled via I
2
C bus
D
4 addresses selectable
D
Four reference divide factors selectable:
1024, 1120, 1152, 1536
D
Superior phase noise performance
D
Deactivation of tuning output programmable
D
6 switching outputs (open collector)
D
Reference frequency doubler (open collector output)
D
Lock status indication (open collector)
D
Fully compatible to U2753B-C
D
SSO20 package
D
Effectively
D
Programmable 15-bit counter 1:2048 to 1:32767
effectively
D
Three state phase detector with programmable charge
pump
Block Diagram
FDO
10
Frequency doubler
x2
Lock detector
REF
NREF
4
5
Reference counter
Three State
Phase
Detector
Fractional N
control
2
Prog.
charge pump
VD
1
PD
NFDO
9
3
PLCK
18
RF
NRF
17
Prog.
13 Bit counter
N/N=1
4 Bit latch
7 Bit latch
2 Bit
latch
5 Bit latch
MUX
MUX
I2C Bus – Interface / Control
Switches
19
20
6
ADR
7
8
11
12
13
14
15
16
GND
VS
SCL
SDA
SWC SWD SWE SWF SWG SWH
12476
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A1, 21-Aug-96
1 (14)
Preliminary Information