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參數資料
| 型號： | AD8361-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | LF to 2.5 GHz TruPwr⑩ Detector |
| 中文描述： | 低頻至2.5 GHz TruPwr⑩探測器 |
| 文件頁數： | 14/16頁 |
| 文件大小： | 306K |
| 代理商： | AD8361-EVAL |
AD8361
–14–
REV. A
chosen to suit the application. GAIN and V
OS
are then calculated
using the equations:
(
(
GAIN
V
V
V
V
OUT
OUT
IN
IN
=
)
)
2
1
2
1
V
V
GAIN
(
V
OS
OUT
IN
=
×
)
1
1
Both
GAIN
and
V
OS
drift over temperature. However, the drift
of V
OS
has a bigger influence on the error relative to the output.
This can be seen by inserting data from Figures 14 and 17 (con-
version gain and intercept drift) into the equation for V
OUT
. These
plots are consistent with Figures 10 and 11 which show that the
error due to temperature drift decreases with increasing input
level. This results from the offset error having a diminishing
influence with increasing level on the overall measurement error.
From Figure 14, the average Intercept drift is 0.43 mV/
°
C from
–
40
°
C to +25
°
C and 0.17 mV/
°
C from +25
°
C to +85
°
C. For a
less rigorous compensation scheme, the average drift over the
complete temperature range can be calculated:
DRIFT
V C
/
V
°
V
)
C
C
VOS
.
.
(
)
=
(
)
+
°
0 010
0 028
40
85
= 0.000304 V/
°
C
With the drift of
V
OS
included, the equation for V
OUT
becomes:
Table V. Evaluation Board Configuration Options
Component
Function
Default Condition
TP1, TP2
SW1
Ground and Supply Vector Pins.
Device Enable. When in Position A, the PWDN pin is connected to +V
S
and
the AD8361 is in power-down mode. In Position B, the PWDN pin is grounded,
putting the device in operating mode.
Operating Mode. Selects either Ground Referenced Mode, Internal Reference
Mode or Supply Reference Mode. See Table I for more details.
Input Coupling. The 75
resistor in position R2 combines with the AD8361
’
s
internal input impedance to give a broadband input impedance of around 50
.
For more precise matching at a particular frequency, R2 can be replaced by a
different value (see Input Matching and Figure 39).
Capacitor C1 ac-couples the input signal and creates a high-pass input
fi
lter
whose corner frequency is equal to approximately 8 MHz. C1 can be increased
for operation at lower frequencies. If resistive attenuation is desired at the input,
series resistor R1, which is nominally 0
, can be replaced by an appropriate value.
Power Supply Decoupling. The nominal supply decoupling of 0.01
μ
F and
100 pF. A series inductor or small resistor can be placed in R6 for additional
decoupling.
Filter Capacitor. The internal 50 pF averaging capacitor can be augmented
by placing a capacitance in C5.
Output Loading. Resistors and capacitors can be placed in C4 and R5 to
load test V rms.
Not Applicable
SW1 = B
SW2/SW3
SW2 = A, SW3 = B
(Ground Reference Mode)
R2 = 75
(Size 0402)
C1 = 100 pF (Size 0402)
C1, R2
C2, C3, R6
C2 = 0.01
μ
F (Size 0402)
C3 = 100 pF (Size 0402)
R6 = 0
(Size 0402)
C5 = 1 nF (Size 0603)
C5
C4, R5
C4 = R5 = Open
(Size 0603)
V
GAIN
(
V
V
DRIFT
TEMP
(
C
°
OUT
IN
OS
VOS
=
×
)
+
+
×
)
25
The equation can be rewritten to yield a temperature compen-
sated value for
V
IN
.
(
V
V
V
DRIFT
TEMP
(
C
°
GAIN
IN
OUT
OS
VOS
=
×
)
)
25
EVALUATION BOARD
Figures 43 and 46 show the schematic of the AD8361 evalua-
tion board. Note that uninstalled components are drawn in as
dashed. The layout and silkscreen of the component side are
shown in Figures 44, 45, 47, and 48. The board is powered by a
single supply in the range, 2.7 V to 5.5 V. The power supply
is decoupled by 100 pF and 0.01
μ
F capacitors. Additional
decoupling, in the form of a series resistor or inductor in R6,
can also be added. Table V details the various con
fi
guration
options of the evaluation board.
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相關代理商/技術參數 |
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|---|---|
| AD8361-EVALZ | 制造商:Analog Devices 功能描述:LF TO 2.5 GHZ TRUPWR DETECTOR - Bulk |
| AD8362 | 制造商:AD 制造商全稱:Analog Devices 功能描述:50 Hz to 2.7 GHz 60 dB TruPwr⑩ Detector |
| AD8362_1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:50 Hz to 3.8 GHz 65 dB TruPwr? Detector |
| AD8362ARU | 功能描述:IC PWR DETECTOR 3.8GHZ 16-TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 檢測器 系列:- 產品變化通告:Product Discontinuation 15/May/2006 標準包裝:3,000 系列:- 頻率:100MHz ~ 2GHz RF 型:手機，GSM，DCS，PCS 輸入范圍:- 精確度:- 電源電壓:2.7 V ~ 5.5 V 電流 - 電源:300µA 包裝:帶卷 (TR) 封裝/外殼:SC-74，SOT-457 其它名稱:NCS5000SNT1GOS |
| AD8362ARU-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:50 Hz to 3.8 GHz 65 dB TruPwr? Detector |
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