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參數資料
| 型號： | AD8304-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 160 dB Range (100 pA -10 mA) Logarithmic Converter |
| 中文描述： | 160分貝范圍（100功率放大器-10毫安）對數轉換器 |
| 文件頁數： | 19/20頁 |
| 文件大?。?/td> | 4286K |
| 代理商： | AD8304-EVAL |
REV. A
AD8304
–19–
Table V. Evaluation Board Configuration Options
Component
Function
Default Condition
V
P
, V
N
, AGND
SW1, R10
Positive and Negative Supply and Ground Pins
Device Enable: When SW1 is in the
“
0
”
position, the PWDN Pin is
connected to ground and the AD8304 is in its normal operating mode.
Buffer Amplifier Gain/Slope Adjustment: The logarithmic slope
of the AD8304 can be altered using the buffer
’
s gain-setting resistors,
R1 and R2.
Intercept Adjustment:
A dc offset can be applied to the input term-
inals of the buffer amplifier to adjust the effective logarithmic intercept.
Bias Adjustment:
The voltage on the VSUM and
INPT Pins can be
altered using appropriate resistor values. R9 is populated with a decoup-
ling capacitor to reduce noise pickup. The decoupling capacitor can be
removed when a fixed bias is applied to VSUM.
Supply Decoupling Capacitors
Not Applicable
SW1 = Installed
R10 = 10 k
(Size 0603)
R1 = Open (Size 0603)
R2 = 0
(Size 0603)
R1, R2
R3, R4
R3 = Open (Size 0603)
R4 = Open (Size 0603)
R5 = R6 = Open (Size 0603)
R7 = R8 = Open (Size 0603)
R9 = 0.1
μ
F (Size 0603)
R5, R6, R7, R8, R9
C1, C2, C3, C4, C9
C1 = C4 = 0.1
μ
F (Size 0603)
C2 = C3 = 1 nF (Size 0603)
C9 = 10 nF (Size 0603)
C10 = 0.1
μ
F (Size 0603)
C10
Photodiode Biaser Decoupling: Provides high frequency decoupling
of the adaptive bias output at Pin VPDB.
Output Filtering: Allows implementation of a variety of filter config-
urations, from simple RC low-pass filters to three-pole Sallen and Key.
C5, C6, C7, C8, R11,
R12, R13, R14
R11 = R13 = 0
(Size 0603)
R12 = Open (Size 0603)
R14 = 0
(Size 0603)
C5 = C6 = Open (Size 0603)
C7 = C8 = Open (Size 0603)
R15 = 750
(Size 0603)
C11 = 1 nF (Size 0603)
LK1 = Installed
LK2 = Open
R15, C11
Input Filtering: Provides essential HF compensation at the input
Pin
INPT.
Guard/Shield Options:
The shells of the SMA
connectors used
for the input and the photodiode bias can be set to the voltage on the
VSUM Pin or connected to ground.
LK1, LK2
Figure 23. Component Side Layout
Figure 24. Component Side Silkscreen
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相關代理商/技術參數 |
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|---|---|
| AD8304-EVALZ | 制造商:Analog Devices 功能描述:Evaluation Kit For 160 DB Range Logarithmic Converter 制造商:Analog Devices 功能描述:EVAL KIT FOR 160 DB RANGE (100 PA -10 MA) LOGARITHMIC CNVRTR - Bulk 制造商:Analog Devices 功能描述:EVAL LOGARITHMIC DECTECTOR AD8304 |
| AD8304XRU | 制造商:Analog Devices 功能描述: |
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| AD8305_CSURF | 制造商:Analog Devices 功能描述: |
| AD8305ACP | 制造商:AD 制造商全稱:Analog Devices 功能描述:100 dB Range (10 nA to 1 mA) Logarithmic Converter |
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