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參數(shù)資料
| 型號： | AD8325 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Fast Switching Digitally Controlled Variable Gain Amplifier(快速轉(zhuǎn)換數(shù)字控制的可變增益放大器) |
| 中文描述： | 快速切換數(shù)字控制可變增益放大器（快速轉(zhuǎn)換數(shù)字控制的可變增益放大器） |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 16K |
| 代理商： | AD8325 |
a
Fast Switching Digitally
Controlled Variable Gain Amplifier
ADVANCED DATA SHEET
AD8325
One Technology Way,
P.O. Box 9106,
Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
This information applies to a product under development. Its characteristics and specifications are subject
to change without notice. Analog Devices assumes no obligation regarding future manufacture of this
product unless otherwise agreed to in writing.
9/24/96
Operating
Temperature Range
-40 to +85
°
C
Model
AD8325AR
Package
20 Lead SOIC
Features
125 MHz Signal Bandwidth
Parallel 8 Bit Logarithmic Control
Fast Switching Variable Gain Block
20 ns Gain Response Time
25 ns Settling Time to 0.1%
User Determined Gain Range
0 dB to +12 dB Nominal
Single Supply Operation
Low Power: Isupply of 18 mA
Power Down to 500 uA
Applications
High Speed Variable Gain
Video Amplification and Gain Switching
Specifications
(at V
CC
= +5 V,T
A
=25
°
C, R
L
=1K
,
C
L
= 5 pF) unless otherwise noted.
PARAMETER
INPUT
Input Impedance
DC Input Voltage
Input Capacitance
Common Mode Input Range
OUTPUT
Output Voltage
Output Voltage Swing
Gain Switching Glitch; RTO
Gain Response Time
Gain Settling Time: to 1.0%
to 0.1%
Overload Recovery (to 1%) for 1V Input Pulse; RTO
Offset Voltage Variation over Full Gain Range; RTO
Output Impedance - Open Loop
Output Impedance - Closed Loop
ACCURACY
Bandwidth (-3 dB)
Noise - Input Referred
Gain Range (Variable over 256 equal dB steps)
Gain Accuracy
Linearity (for max. output)
Differential Gain
Differential Phase
POWER REQUIREMENTS
DC Supply
Quiescent Current
Power-Down Current
TEMPERATURE RANGE
Standard Temperature Range
MIN
TYP
MAX
UNITS
1
M
Vdc
pF
Vdc
GND
Vcc
2
Vcc-2
GND + 2
GND +1
Vcc -2
Vdc
V p-p
mV
ns
ns
ns
ns
mV
K
2
+/- 100
20
7
25
20
+/-2
2
1
125
MHz
nV
√
Hz
dB
%
%
%
°
7.5
12
+/- .5
+/- .1
TBD
TBD
5
12
Vdc
mA
uA
18
500
-40
+85
o
C
8
AGND
Gain Data
0:7
OUTPUT
OFFSET
OUTPUT
G = 1-4
VGA
VCC
PD
- IN
+ IN
REXT
DGND
VGN
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