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參數(shù)資料
| 型號(hào)： | AD7011ARS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | MB 4C 4#12 PIN RECP |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO24 |
| 封裝： | SSOP-24 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 389K |
| 代理商： | AD7011ARS |
AD7011
REV. B
–8–
T E RMINOLOGY
E rror Vector Magnitude
T his is a measure of the rms error vector introduced by the
AD7011 where signal error vector is defined as the rms devia-
tion of a transmitted symbol from its ideal position when filtered
by an Ideal RRC Receive filter, as illustrated in Figure 8.
Gain Matching Between Channels
T he is the gain matching between the I and Q outputs, measured
when transmitting all zeros.
Offset Vector Magnitude
T his is a measure of the offset vector introduced by the AD7011
as illustrated in Figure 8. T he offset vector is calculated so as to
minimize the rms error vector for each of the constellation
points.
Output Signal Range and Different Output Range
T he output signal range is the output voltage swing and dc bias
level for each of the analog outputs. T he different output range
is the difference between IT x and
ITx
for the I channel and the
difference between QT x and
QTx
for the Q Channel.
IS-54 Spurious Power
T his is the rms sum of the spurious power measured at multiples
of 30 kHz, in a root raised cosine window of
±
16.4 kHz, relative
to twice the rms power in a RRC window in the 0 to 16.4 kHz
band.
Signal Vector Magnitude
T his is the radius of the IQ constellation diagram as illustrated
in Figure 8.
Signal to (Noise + Distortion) Ratio
T his is the measured ratio of signal to (noise + distortion) at the
output of the transmit I and Q DACs. T he signal is the rms
amplitude of the fundamental. Noise is the rms sum of all non-
fundamental signals up to half the sampling frequency (f
S
/2),
excluding dc. T he ratio is dependent upon the number of
quantization levels in the digitization process; the more levels,
the smaller the quantization noise. T he theoretical signal to
(noise distortion) ratio for a sine wave is given by:
SNR = (
6.02
N
+ 1.76)
dB
where
N
is the number of bits. T hus for an ideal 10-bit con-
verter, SNR = 61.96 dB.
I
Q
ERROR VECTOR
OFFSET
VECTOR
0,0
SIGNAL VECTOR
Figure 8.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7011ARS-REEL | 制造商:Analog Devices 功能描述:Quadrature Mod 24-Pin SSOP T/R 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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| AD7013ARS | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS TIA IS-54 Baseband Receive Port |
| AD7013ARS-REEL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RF/Baseband Circuit |
| AD7015 | 制造商:AD 制造商全稱:Analog Devices 功能描述:GSM Baseband Processing Chipset |
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