전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

ADRF6510 데이터시트(PDF) 18 Page - Analog Devices

부품명 ADRF6510
상세설명  Dual Programmable Filters Variable Gain Amplifiers
Download  32 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

ADRF6510 데이터시트(HTML) 18 Page - Analog Devices

Back Button ADRF6510_17 Datasheet HTML 14Page - Analog Devices ADRF6510_17 Datasheet HTML 15Page - Analog Devices ADRF6510_17 Datasheet HTML 16Page - Analog Devices ADRF6510_17 Datasheet HTML 17Page - Analog Devices ADRF6510_17 Datasheet HTML 18Page - Analog Devices ADRF6510_17 Datasheet HTML 19Page - Analog Devices ADRF6510_17 Datasheet HTML 20Page - Analog Devices ADRF6510_17 Datasheet HTML 21Page - Analog Devices ADRF6510_17 Datasheet HTML 22Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 18 / 32 page
background image
ADRF6510
Data Sheet
Rev. B | Page 18 of 32
–100
–135
0.5
1.0
1.5
2.0
2.5
3.0
FREQUENCY (MHz)
–130
–125
–120
–115
–110
–105
BANDWIDTH = 1MHz
GAIN = 40dB
GAIN = 20dB
GAIN = 0dB
Figure 48. Total Output Noise with a 1 MHz Corner Frequency
for Three Different Gain Settings
Note that the noise spectral density outside the filter bandwidth
is limited by the fixed VGA output noise. It may be necessary to
use an external, fixed-frequency, passive filter prior to an analog-
to-digital conversion to prevent noise aliasing from degrading
the signal-to-noise ratio. The higher the sampling rate relative
to the maximum ADRF6510 corner frequency setting to be used,
the lower the order of the external filter.
DISTORTION CHARACTERISTICS
The distortion performance of the ADRF6510 is similar to its
noise performance. The filters and the VGAs contribute to the
overall distortion and signal handling capabilities. Furthermore,
the front end must also cope with out-of-band signals that can be
larger than the in-band signals. These out-of-band signals are
filtered before reaching the VGA. It is important to understand
the signals presented to the ADRF6510 and to match these
signals with the input and output characteristics of the part.
When the gain is low, the distortion is typically limited by the
input section because the output is not driven to its maximum
capacity. When the gain is high, the distortion is likely limited
by the output section because the input is not driven to its
maximum capacity. An exception to this is when the input is
driven with a small desired signal in combination with a large
out-of-band signal. In this case, the out-of-band signal may
drive the input to distort. As long as the input is not overdriven,
the out-of-band signal is removed by the filter. A high VGA
gain is still needed to raise the small desired signal to a higher
level at the output. The overall distortion introduced by the part
depends on the input drive level, including the out-of-band
signals, and the desired output signal level.
As noted in the Input Buffers section, the input section can
handle a total signal level of 1 V p-p for a 6 dB preamplifier and
500 mV p-p for a 12 dB preamplifier with >50 dBc harmonic
distortion. This includes both in-band and out-of-band signals.
To distinguish and quantify the distortion performance of the
input section, two different IP3 specifications are presented.
The first is called in-band IP3 and refers to a two-tone test
where the signals are inside the filter bandwidth. This is exactly
the same figure of merit familiar to communications engineers
in which the third-order intermodulation level, IM3, is
measured.
To quantify the effect of out-of-band signals, a new out-of-band
(OOB) IIP3 figure of merit is introduced. This test also involves
a two-tone stimulus; however, the two tones are placed out-of-
band so that the lower IM3 product lands in the middle of the
filter pass band. At the output, only the IM3 product is visible
because the original two tones are filtered out. To calculate the
OOB IP3 at the input, the IM3 level is referred to the input by
the overall gain. The OOB IIP3 allows the user to predict the
impact of out-of-band blockers or interferers at an arbitrary
signal level on the in-band performance. The ratio of the
desired input signal level to the input-referred IM3 at a given
blocker level represents a signal-to-distortion limit imposed by
the out-of-band signals.
MAXIMIZING THE DYNAMIC RANGE
The role of the ADRF6510 is to increase the level of a variable
in-band signal while minimizing out-of-band signals. Ideally,
this is achieved without degrading the SNR of the incoming
signal or introducing distortion to the incoming signal.
The first goal is to maximize the output signal swing, which can
be defined by the ADC input range or the input signal capacity
of the next analog stage. For the complex waveforms often encoun-
tered in communication systems, the peak-to-average ratio, or
crest factor, must be considered when choosing the peak-to-peak
output. From the chosen output signal and the maximum gain
of the ADRF6510, the minimum input level can be defined.
Lower signal levels do not yield the maximum output and suffer
a greater degradation in SNR.
As the input signal level increases, the VGA gain is reduced from
its maximum gain point to maintain the desired fixed output
level. The output noise, initially dominated by the filter, follows
the gain reduction, yielding a progressively better SNR. At some
point, the VGA gain drops sufficiently that the constant VGA
noise becomes dominant, resulting in a constant SNR from that
point. From the perspective of SNR alone, the maximum input
level is reached when the VGA reaches its minimum gain.
Distortion must also be considered when maximizing the dynamic
range. At low and moderate signal levels, the output distortion
is constant and assumed to be adequate for the selected output
level. At some point, the input signal becomes large enough that
distortion at the input limits the system. The maximum tolerable
input signal depends on whether the input distortion becomes
unacceptably large or the minimum gain is reached.


유사한 부품 번호 - ADRF6510_17

제조업체부품명데이터시트상세설명
logo
Analog Devices
ADRF6510-EVALZ AD-ADRF6510-EVALZ Datasheet
563Kb / 28P
   30 MHz Dual Programmable Filters and Variable Gain Amplifiers
REV. 0
ADRF6510ACPZ-R7 AD-ADRF6510ACPZ-R7 Datasheet
563Kb / 28P
   30 MHz Dual Programmable Filters and Variable Gain Amplifiers
REV. 0
ADRF6510ACPZ-WP AD-ADRF6510ACPZ-WP Datasheet
563Kb / 28P
   30 MHz Dual Programmable Filters and Variable Gain Amplifiers
REV. 0
More results

유사한 설명 - ADRF6510_17

제조업체부품명데이터시트상세설명
logo
Analog Devices
ADRF6516 AD-ADRF6516_17 Datasheet
1Mb / 29P
   Dual Programmable Filters and Variable Gain Amplifiers
ADRF6510 AD-ADRF6510 Datasheet
563Kb / 28P
   30 MHz Dual Programmable Filters and Variable Gain Amplifiers
REV. 0
ADRF6518 AD-ADRF6518 Datasheet
1Mb / 36P
   63 MHz Dual Programmable Filters and Variable Gain Amplifiers
Rev. PrA
ADRF6518 AD-ADRF6518_17 Datasheet
1Mb / 39P
   1.1 GHz Variable Gain Amplifiers Baseband Programmable Filters
AD8366 AD-AD8366_17 Datasheet
1Mb / 28P
   Dual-Digital Variable Gain Amplifiers
AD600 AD-AD600_06 Datasheet
588Kb / 28P
   Dual, Low Noise, Wideband Variable Gain Amplifiers
Rev. E
AD602 AD-AD602_15 Datasheet
677Kb / 33P
   Dual, Low Noise, Wideband Variable Gain Amplifiers
Rev. F
AD600 AD-AD600_15 Datasheet
677Kb / 33P
   Dual, Low Noise, Wideband Variable Gain Amplifiers
Rev. F
AD600 AD-AD600 Datasheet
669Kb / 20P
   Dual, Low Noise, Wideband Variable Gain Amplifiers
REV. A
AD8366ACPZ-R7 AD-AD8366ACPZ-R7 Datasheet
894Kb / 28P
   DC to 600 MHz, Dual-Digital Variable Gain Amplifiers
REV. A
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com