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參數(shù)資料
| 型號： | HFA1113EVAL |
| 廠商： | Intersil Corporation |
| 英文描述： | 850MHz, Low Distortion, Output Limiting, Programmable Gain, Buffer Amplifier |
| 中文描述： | 是850MHz，低失真，輸出限制，可編程增益，緩沖放大器 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大?。?/td> | 568K |
| 代理商： | HFA1113EVAL |
DESIGN INFORMATION
(Continued)
The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as
application and design information only. No guarantee is implied.
causing the clamped output voltage to increase as well.
I
CLAMP
is a function of the overdrive level (A
VCL
x V
IN
- V
OUT
CLAMPED
), so clamp accuracy degrades as the overdrive
increases. As an example, the specified accuracy of
±
100mV
for a 1.6X overdrive degrades to
±
240mV for a 3X overdrive.
208
HFA1113
Consideration must also be given to the fact that the clamp
voltages have an affect on amplifier linearity. The “Nonlin-
earity Near Clamp Voltage” curve in the data sheet illus-
trates the impact of several clamp levels on linearity.
Clamp Range
Unlike some competitor devices, both V
H
and V
L
have usable
ranges that cross 0V. While V
H
must be more positive than
V
L
, both may be positive or negative, within the range restric-
tions indicated in the specifications. For example, the
HFA1113 could be limited to ECL output levels by setting
V
H
= -0.8V and V
L
= -1.8V. V
H
and V
L
may be connected to
the same voltage (GND for instance) but the result won’t be a
DC output voltage from an AC input signal. A 150 - 200mV AC
signal will still be present at the output.
Recovery from Overdrive
The output voltage remains at the clamp level as long as the
overdrive condition remains. When the input voltage drops
below the overdrive level (V
CLAMP
/ A
VCL
) the amplifier will
return to linear operation. A time delay, known as the Over-
drive Recovery Time, is required for this resumption of linear
operation. The plots of “Unclamped Performance” and
“Clamped Performance” highlight the HFA1113’s subnano-
second recovery time. The difference between the
unclamped and clamped propagation delays is the overdrive
recovery time. The appropriate propagation delays are 8.0ns
for the unclamped pulse, and 8.8ns for the clamped (2X
overdrive) pulse yielding an overdrive recovery time of
800ps. The measurement uses the 90% point of the output
transition to ensure that linear operation has resumed. Note:
The propagation delay illustrated is dominated by the fixtur-
ing. The delta shown is accurate, but the true HFA1113
propagation delay is 500ps.
Spec Number
511106-883
TYPICAL PERFORMANCE CHARACTERISTICS
Device Characterized at: V
SUPPLY
=
±
5V, A
V
= +2V/V, R
L
= 100
, Unless Otherwise Specified.
PARAMETERS
CONDITIONS
TEMPERATURE
TYPICAL
UNITS
Output Offset Voltage
A
V
= +1, V
CM
= 0V
+25
o
C
8
mV
Average Offset Voltage Drift
Versus Temperature
Full
10
μ
V/
o
C
+Input Current
A
V
= +1, V
CM
= 0V
+25
o
C
25
μ
A
+Input Resistance
A
V
= +1,
V
CM
= 2V
+25
o
C
50
k
-Input Resistance
+25
o
C
300
+Input Noise Voltage *
f = 100kHz
+25
o
C
9
nV/
√
Hz
+Input Noise Current *
f = 100kHz
+25
o
C
37
pA/
√
Hz
Input Common Mode Range
Full
±
2.8
V
Input Capacitance
+25
o
C
2.2
pF
Gain
A
V
= +1, V
IN
= 2V
+25
o
C
0.99
V/V
Gain
A
V
= +2, V
IN
= 1V
+25
o
C
1.98
V/V
DC Non-Linearity *
V
OUT
=
±
2V Full Scale
+25
o
C
0.02
%
Output Voltage *
A
V
= -1, R
L
= 100
+25
o
C
±
3.3
V
A
V
= -1, R
L
= 100
Full
±
3.0
V
Output Current *
A
V
= -1, R
L
= 50
+25
o
C to +125
o
C
±
60
mA
A
V
= -1, R
L
= 50
-55
o
C to 0
o
C
±
50
mA
DC Closed Loop Output Resistance
+25
o
C
0.3
Quiescent Supply Current *
R
L
= Open
Full
24
mA
-3dB Bandwidth *
A
V
= -1, V
OUT
= 200mV
P-P
+25
o
C
800
MHz
A
V
= +1, V
OUT
= 200mV
P-P
+25
o
C
850
MHz
A
V
= +2, V
OUT
= 200mV
P-P
+25
o
C
550
MHz
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