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參數(shù)資料
| 型號(hào)： | ADF7010 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Performance ISM Band ASK/FSK/GFSK Transmitter IC |
| 中文描述： | 高性能ISM頻段詢價(jià)/ FSK信號(hào)/發(fā)射器集成電路的GFSK |
| 文件頁(yè)數(shù)： | 18/20頁(yè) |
| 文件大小： | 561K |
| 代理商： | ADF7010 |
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REV. 0
–18–
ADF7010
16 – j33
5.00
1.00
0.50
0.20
0.00
0.0
0.20
0.50
1.00
2.00
30
40
50
60
70
80
90
100
110
120
130
140
L(SERIES) = 6.8nH
150
2.00
L(SHUNT) = 12nH
5.00
Figure 10. Output Impedance on Smith Chart
FRACTIONAL-N
N COUNTER AND ERROR CORRECTION
The ADF7010 consists of a 15-bit sigma-delta fractional N
divider. The N Counter divides the output frequency to the output
stage back to the PFD frequency. It consists of a prescaler, integer,
and fractional part.
The prescaler can be 4/5 or 8/9. The spurious performance is
better with a 4/5 prescaler, and the N-value can be lower since
N
MIN
is
P
2
+ 3
P
+ 3.
The output frequency of the PLL is:
PFD Frequency
Int
Fractional
2
Error
￥
+
￥
+
(
)
2
3
15
INTEGER N
FRACTIONAL N
R
REFERENCE IN
N
THIRD ORDER
-
MODULATOR
PFD/
CHARGE
PUMP
VCO
Figure 11. Fractional-N PLL
Fractional-N Registers
The fractional part is made up of a 15-bit divide, made up of
a 12-bit N value in the N Register summed with a 10-bit (plus
sign bit) in the R-Register that is used for error correction, as
shown in Figure 12.
M12 M11 M10
M9
M8
M7
M6
M5
M4
M3
M2
M1
12-BIT N VALUE
F10
F9
F8
F7
F6
F5
F4
10-BIT ( SIGN) ERROR CORRECTION
F3
F2
F1
N14
N13
N12
N11
N10
N9
N8
N7
N6
N5
N4
N3
15-BIT FRACTIONAL N REGISTER
N2
N1
N0
Figure 12. Fractional Components
The resolution of each register is the smallest amount that the
output frequency can be changed by changing the LSB of the
register.
Changing the Output Frequency
The fractional part of the N Register changes the output fre-
quency by:
-
(
)(
)
F
N
PFD
RegisterValue
2
12
The frequency error correction contained in the R Register
changes the output frequency by:
(
)(
)
F
Frequency Error Correction Value
2
15
PFD
By default, this will be set to 0. The user can calibrate the system
and set this by writing a twos complement number to Bits F1
–
F11
in the R Register. This can be used to compensate for initial error,
temperature drift, and aging effects in the crystal reference.
Integer N Register
The integer part of the N-Counter contains the prescaler and A and
B counters. It is eight bits wide and offers a divide of
P
2
+ 3
P
+ 3
to 255.
The combination of the integer (255) and the fractional (31767/
31768) give a maximum N Divider of 256. The minimum PFD
usable is:
F
MaximumOutput Frequency
(
PFD
(min)
)
=
Required
255 1
For use in the U.S. 902 MHz
–
928 MHz band, there is a restriction
to using a minimum PFD of 3.625 MHz to allow the user to have
a center frequency of 928 MHz.
PFD Frequency
The PFD frequency is the number of times a comparison is
made between the reference frequency and the feedback signal
from the output.
The higher the PFD frequency, the more often a comparison is
made at the PFD. This also allows a wider loop bandwidth
without compromising stability. This means that the frequency
lock time will be reduced when jumping from one frequency to
another by increasing the PFD.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADF7010BRU | 制造商:Rochester Electronics LLC 功能描述:900 MHZ ISM TRANSMITTER I.C. - Bulk |
| ADF7010BRU-REEL7 | 制造商:Analog Devices 功能描述:IC,RF Modulator,TSSOP,24PIN,PLASTIC |
| ADF7010BRUZ | 功能描述:IC XMITTER ASK/FSK/GFSK 24TSSOP RoHS:是 類別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應(yīng)用:- 調(diào)制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲(chǔ)容量:- 特點(diǎn):- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ADF7010BRUZ-REEL | 制造商:Rochester Electronics LLC 功能描述:900 MHZ ISM TRANSMITTER I.C. - Tape and Reel |
| ADF7010BRUZ-REEL7 | 功能描述:IC XMITTER ASK/FSK/GFSK 24TSSOP RoHS:是 類別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應(yīng)用:- 調(diào)制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲(chǔ)容量:- 特點(diǎn):- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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