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參數資料
| 型號： | AD8369 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | 45 dB Digitally Controlled VGA LF to 600 MHz |
| 中文描述： | 45分貝的數字控制VGA低頻至600兆赫 |
| 文件頁數： | 20/24頁 |
| 文件大小： | 968K |
| 代理商： | AD8369 |
REV. 0
–20–
AD8369
APPENDIX
Characterization Equipment
Two sets of automated characterization equipment were used to
obtain the majority of the information contained in this data sheet.
An Agilent N4441A Balanced Measurement System was used to
obtain the gain, phase, group delay, reverse isolation, CMRR,
and s-parameter information. Except for the s-parameter informa-
tion, T-attenuator pads were used to match the 50
W
impedance of
the ports of this instrument to the AD8369.
An Anritsu MS4623B “Scorpion” Vector Network Analyzer was
used to obtain nonlinear measurements IMD
3
, IP3, and P1dB
through matching baluns and attenuator networks.
Definitions of Selected Parameters
Common-mode rejection ratio (TPC 14) has been defined for
this characterization effort as:
Differential Mode forwardgain
Common Mode forwardgain
-
-
,
,
where the numerator is the gain into a differential load at the
output due to a differential source at the input and the denomina-
tor is the gain into a common-mode load at the output due to a
common-mode source at the input. In terms of mixed-mode
s-parameters, this equates to:
SDD
SCC
21
21
Reverse isolation (TPC 17) is defined as SDD12.
More information on mixed-mode s-parameters can be obtained
in the a reference by Bockelman, D.E. and Eisenstadt, W.R.,
Combined Differential and Common-Mode Scattering Parameters:
Theory and Simulation
. IEEE Transactions on Microwave Theory
and Techniques, v 43, n 7, 1530 (July 1995).
Composite Waveform Assumption
The nonlinear two-tone measurements made for this data sheet,
i.e., IMD
3
and IP3, are based on the assumption of a fixed value
composite waveform at the output, generally 1 V p-p. The fre-
quencies of interest dictate the use of RF test equipment and
because this equipment is generally not designed to work in
units of volts, but rather watts and dBm, an assumption was
made to simplify equipment setup and operation.
Two sinusoidal tones can be represented as:
V
V
The average voltage of one tone is:
f t
1
2
=
(
(
)
sin
p
f t
2
2
=
)
sin
p
1
T
1
2
0
1
2
V
dt
T
ú
( )
=
where T is the period of the waveform. The average voltage of the
two-tone composite signal is:
1
T
1
0
1
2
2
V
(
V
dt
T
ú
+
)
=
So each tone contributes 1/
÷
2
to the average composite ampli-
tude in terms of voltage. It can be shown that
the average
power of this composite waveform is two times greater, or 3dB,
than that of the single tone.
This principle can be used to set
correct input amplitudes from generators scaled in dBm and
is correct if the two tones are of equal amplitude and are not
farther than 1 percent apart in frequency.
R
L
R1
10nF
CONTROL INTERFACE
9
10
11
FILT
12
13
14
15
16
INHI COMM
PWUP VPOS SENB
CMDC OPHI
INLO
1
DENB
7
COMM BIT0
2
BIT1
4
BIT2
5
BIT3
6
AD8369
OPLO
0.1 F
8
3
V
S
PORT1
PORT2
PORT3
PORT4
AGILENT N4441A
(ALL PORTS 50 )
R1
10nF
R2
R2
10nF
10nF
69.8
69.8
69.8
69.8
10nF
0.1 F
1nF
R
L
= 200 DIFFERENTIAL: R1 = 69.8 , R2 = 69.8
R
L
= 1000 DIFFERENTIAL: R1 = 475 , R2 = 52.3
Figure 12. Balanced Measurement System Setup
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相關代理商/技術參數 |
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|---|---|
| AD8369ARM | 制造商:Analog Devices 功能描述:500 MHZ DIGITAL VGA - Bulk |
| AD8369ARU | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Single 5.5V 16-Pin TSSOP Tube 制造商:Rochester Electronics LLC 功能描述:TSSOP IF DIGITAL CONTROL VGA - Bulk 制造商:Analog Devices 功能描述:IC SEMICONDUCTOR ((NS)) |
| AD8369ARU-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD8369ARU-REEL7 | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Single 5.5V 16-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:TSSOP IF DIGITAL CONTROL VGA - Tape and Reel |
| AD8369ARUZ | 功能描述:IC AMP VGA 16TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標準包裝:2,500 系列:- 放大器類型:通用 電路數:4 輸出類型:- 轉換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
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