參數(shù)資料
型號(hào): HCA10009
廠商: Intersil Corporation
英文描述: T-NPN- SI-VHF PO
中文描述: 100MHz的單和雙低噪聲,精密運(yùn)算放大器
文件頁數(shù): 5/10頁
文件大?。?/td> 529K
代理商: HCA10009
4-5
Application Information
Operation at Various Supply Voltages
The HCA10009 operates over a wide range of supply
voltages with little variation in performance. The supplies
may be varied from
±
5V to
±
15V. See Typical Performance
Curves for variations in supply current, slew rate and output
voltage swing.
Offset Adjustment
The following diagram shows the offset voltage adjustment
configuration for the HCA10009. By moving the
potentiometer wiper towards pin 8 (+BAL), the op amps
output voltage will increase; towards pin 1 (-BAL) decreases
the output voltage. A 20k
trim pot will allow an offset
voltage adjustment of about 10mV.
Capacitive Loading Considerations
When driving capacitive loads >80pF, a small resistor, 50
to 100
, should be connected in series with the output and
inside the feedback loop.
Saturation Recovery
When an op amp is over driven, output devices can saturate
and sometimes take a long time to recover. By clamping the
input, output saturation can be avoided. If output saturation
can not be avoided, the maximum recovery time when
overdriven into the positive rail is 10.6
μ
s. When driven into
the negative rail the maximum recovery time is 3.8
μ
s.
Input Protection
The HCA10009 has built in back-to-back protection diodes
which limit the maximum allowable differential input voltage
to approximately 5V. If the HCA10009 will be used in circuits
where the maximum differential voltage may be exceeded,
then current limiting resistors must be used. The input
current should be limited to a maximum of 10mA.
PC Board Layout Guidelines
When designing with the HCA10009, good high frequency
(RF) techniques should be used when building a PC board.
Use of ground plane is recommended. Power supply
decoupling is very important. A 0.01
μ
F to 0.1
μ
F high quality
ceramic capacitor at each power supply pin with a 2.2
μ
F to
10
μ
F tantalum close by will provide excellent decoupling.
Chip capacitors produce the best results due to ease of
placement next to the op amp and basically no lead
inductance. If leaded capacitors are used, the leads should
be kept as short as possible to minimize lead inductance.
7
1
8
6
2
3
+15V
4
-15V
R
P
+
+
R
LIMIT
R
LIMIT
V
OUT
2
3
6
V
IN
Typical Performance Curves
V
S
=
±
15V, T
A
= 25
o
C
FIGURE 5. OPEN LOOP GAIN AND PHASE vs FREQUENCY
FIGURE 6. CLOSED LOOP GAIN vs FREQUENCY
GAIN
PHASE
G
FREQUENCY (Hz)
120
100
80
60
40
20
0
1K
10K
100K
1M
100M
0
45
90
135
180
P
R
L
= 1K, C
L
= 50pF
10M
GAIN
PHASE
FREQUENCY (Hz)
G
P
10K
100K
1M
100M
0
45
90
135
180
10M
12
9
6
3
0
-3
-6
A
V
= +1, R
L
= 1K, C
L
= 50pF
HCA10009
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