- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382702 > U2730B-BFS L-Band Down-Converter for DAB Receivers PDF資料下載
參數(shù)資料
| 型號(hào)： | U2730B-BFS |
| 英文描述： | L-Band Down-Converter for DAB Receivers |
| 中文描述： | L波段下為DAB接收器 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 271K |
| 代理商： | U2730B-BFS |
U2730B-B
Rev. A1, 22-Jul-98
Preliminary Information
4 (12)
Reference Divider
Four different scaling factors of the reference divider can
be selected by the input Pin S: 32, 35, 36, 48. Starting
from a reference oscillator frequency of 16.384 MHz/
17.92 MHz/ 18.432 MHz/ 24.576 MHz these scaling
factors result in an output frequency of the reference
divider of 512 kHz. If the input control Pin C is left open
(high-impedance state), a test signal which monitors the
output frequency of the reference divider appears at the
output Pin TRD of the test interface.
LO Divider
The LO divider is operated at the fixed division ratio
2464. Assuming the settings described in the section
‘Reference divider’, the oscillator’s frequency is
controlled to be 1261.568 MHz in locked state, the output
frequency of the RF divider is 512 kHz. In analogy to the
reference divider, a test signal which monitors the output
frequency of the RF divider appears at the output
Pin TMD of the test interface if the input control Pin C is
left open (high-impedance state).
Phase Comparator,
Charge Pump and Loop Filter
The tristate phase detector causes the charge pump to
source or to sink current at the output Pin PD depending
on the phase relation of its input signals which are
provided by the reference and the RF divider respectively.
By means of the control Pin C, two different values of this
current can be selected, and furthermore the charge-pump
current can be switched off.
A high-gain amplifier (output Pin CD) which is
implemented to construct a loop filter, as shown in the
application circuit, can be switched off by means of the
control Pin C. In the application circuit figure 3, the loop
filter is completed by connecting the Pins PD and CD by
an appropriate RC network.
An internal lock detector checks if the phase difference of
the input signals of the phase detector is smaller than
approximately 250 ns in seven subsequent comparisons.
If a phase lock is detected, the open collector output
Pin PLCK is set to HIGH. It should be noted that the
output current of this pin must be limited by external
circuitry as it is not limited internally. If the voltage at the
control Pin C is chosen to be half the supply voltage, or
if this control pin is left open, the lock-detector function
is de-activated and the logical value of the PLCK output
is undefined.
Absolute Maximum Ratings
Parameters
Symbol
V
CC
V
RF
V
AGC
V
TH
V
TANK
Value
Unit
V
mV
pp
V
V
V
pp
Supply voltage
RF input voltage
Voltage at Pin AGC
Voltage at Pin TH
Input voltage at Pin TANK
(internal oscillator overdriven)
Current at IF output
Reference input voltage (diff.)
Control input voltage
PLCK output current
PLCK output voltage
Junction temperature
Storage temperature
Pins 3, 9, 20 and 28
Pins 25 and 26
Pin 18
Pin 17
–0.3 to +9.5
750
0.5 to 6
–0.3 to +4.0
1
Pin 5
Pin 19
Pins 15 and 16
Pins 1, 2 and 27
Pin 14
Pin 14
I
IF
4.0
1
mA
V
pp
V
mA
V
°
C
°
C
REF, NREF
C, S
I
PLCK
V
PLCK
T
j
T
stg
–0.3 to +9.5
0.5
–0.3 to +5.5
125
–40 to +125
Operating Range
Parameters
Symbol
V
CC
T
amb
Min.
8.0
–40
Typ.
8.5
Max.
9.35
+85
Unit
V
°
C
Supply voltage
Ambient temperature
Pins 3, 9, 20 and 28
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| U2730B-BFSG1 | L-Band Down-Converter for DAB Receivers |
| U2733B-C | Fractional-N Frequency Synthesizer for DAB Tuner |
| U2739M | DAB One-Chip Channel- and Source / Data Decoder |
| U2740B | UHF AM/FM Transmitter |
| U2740B-BFP | UHF AM/FM Transmitter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U2730B-BFSG1 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:L-Band Down-Converter for DAB Receivers |
| U2730B-N | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:L-band Down-converter for DAB Receivers |
| U2730B-NFS | 功能描述:IC DOWN-CONV FOR DAB RCVR 28SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 混頻器 系列:U2730 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- RF 型:W-CDMA 頻率:2.11GHz ~ 2.17GHz 混頻器數(shù)目:1 增益:17dB 噪音數(shù)據(jù):2.2dB 次要屬性:- 電流 - 電源:11.7mA 電源電壓:2.7 V ~ 3.3 V 包裝:托盤(pán) 封裝/外殼:12-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| U2730B-NFSG1 | 功能描述:IC DOWN-CONV FOR DAB RCVR 28SSOP RoHS:是 類別:RF/IF 和 RFID >> RF 混頻器 系列:U2730 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- RF 型:W-CDMA 頻率:2.11GHz ~ 2.17GHz 混頻器數(shù)目:1 增益:17dB 噪音數(shù)據(jù):2.2dB 次要屬性:- 電流 - 電源:11.7mA 電源電壓:2.7 V ~ 3.3 V 包裝:托盤(pán) 封裝/外殼:12-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:12-QFN-EP（3x3） |
| U2731B | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:DAB ONE- CHIP FRONT END |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。