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參數資料
| 型號： | LF13006 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Digital Gain Set |
| 中文描述： | 數字增益設置 |
| 文件頁數： | 5/8頁 |
| 文件大小： | 189K |
| 代理商： | LF13006 |
Application Information
FLOW-THROUGH OPERATION
THE LF13006, LF13007 can be operated with control lines
CS and WR grounded. In this mode new data on the digital
inputs will immediately set the new gain value. Input data
cannot be latched in this mode.
INPUT CURRENT
Current flowing through the input (pin 2) due to bias current
of the op amp will result in a gain error due to switch imped-
ance. Normally this error is very small. For example, 10 nA
of bias current flowing through 3 k
X
of switch resistance will
result in an error of 30
m
V at the summing node. However,
applications that have significant current flowing through the
input must take this effect into account.
SETTLING TIME
Settling time is a function of the particular op amp used with
the LF13006/7 and the gain that is selected. It can be opti-
mized and stability problems can be prevented through the
use of a lead capacitor from the inverting input to the output
of the amplifier. A lead capacitor is effective whenever the
feedback around an amplifier is resistive, whether with dis-
crete resistors or with the LF13006/7. It compensates for
the feedback pole created by the parallel resistance and
capacitance from the inverting input of the op amp to AC
ground.
Settling Time Test Circuit
TL/H/5114–6
Typical Settling Time Curves
TL/H/5114–7
*
Unstable at C
L
less than 2 pF
Typical Applications
Variable Capacitance Multiplier
C
effective
e
C1(gain set
Y
)
Note: Output swing at input op amp
is multiplied by set gain. Signal
range may be limited.
TL/H/5114–8
Variable Time Constant Filter
Time constant
e
R
N
e
setting of LF13006
(range
e
11
TL/H/5114–9
5
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LF13006D/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DIGITAL GAIN SET|BIPOLAR|DIP|16PIN|CERAMIC |
| LF13006N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DIGITAL GAIN SET|BIPOLAR|DIP|16PIN|PLASTIC |
| LF13006N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DIGITAL GAIN SET|BIPOLAR|DIP|16PIN|PLASTIC |
| LF13007 | 制造商:Texas Instruments 功能描述: |
| LF13007D/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DIGITAL GAIN SET|BIPOLAR|DIP|16PIN|CERAMIC |
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