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參數(shù)資料
| 型號： | HFA1130IB |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | CAPACITOR 1500UF 200V ELECT TSUP |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 162K |
| 代理商： | HFA1130IB |
4
Application Information
Optimum Feedback Resistor (R
F
)
The enclosed plots of inverting and non-inverting frequency
response detail the performance of the HFA1100/1120 in
various gains. Although the bandwidth dependency on A
CL
isn’t as severe as that of a voltage feedback amplifier, there is
an appreciable decrease in bandwidth at higher gains. This
decrease can be minimized by taking advantage of the
current feedback amplifier’s unique relationship between
bandwidth and R
F
. All current feedback amplifiers require a
feedback resistor, even for unity gain applications, and the R
F
,
in conjunction with the internal compensation capacitor, sets
the dominant pole of the frequency response. Thus, the
amplifier’s bandwidth is inversely proportional to R
F
. The
HFA1100, 1120 designs are optimized for a 510
R
F
, at a
gain of +1. Decreasing R
F
in a unity gain application
decreases stability, resulting in excessive peaking and
overshoot (Note: Capacitive feedback causes the same
problems due to the feedback impedance decrease at higher
frequencies). At higher gains the amplifier is more stable, so
R
F
can be decreased in a trade-off of stability for bandwidth.
The table below lists recommended R
F
values for various
gains, and the expected bandwidth.
Clamp Operation
General
The HFA1130 features user programmable output clamps to
limit output voltage excursions. Clamping action is obtained
by applying voltages to the V
H
and V
L
terminals (pins 8 and
5) of the amplifier. V
H
sets the upper output limit, while V
L
sets the lower clamp level. If the amplifier tries to drive the
output above V
H
, or below V
L
, the clamp circuitry limits the
output voltage at V
H
or V
L
(
±
the clamp accuracy),
respectively. The low input bias currents of the clamp pins
allow them to be driven by simple resistive divider circuits, or
active elements such as amplifiers or DACs.
Clamp Circuitry
Figure 1 shows a simplified schematic of the HFA1130 input
stage, and the high clamp (V
H
) circuitry. As with all current
feedback amplifiers, there is a unity gain buffer (Q
X1
- Q
X2
)
betweenthepositiveandnegativeinputs.Thisbufferforces-INto
track +IN, and sets up a slewing current of (V
-IN
- V
OUT
)/R
F
.
This current is mirrored onto the high impedance node (Z) by
Q
X3
-Q
X4
,whereitisconvertedtoavoltageandfedtotheoutput
via another unity gain buffer. If no clamping is utilized, the high
impedance node may swing within the limits defined by Q
P4
and
Q
N4
. Note that when the output reaches it’s quiescent value, the
current flowing through -IN is reduced to only that small current
(-I
BIAS
) required to keep the output at the final voltage.
Tracing the path from V
H
to Z illustrates the effect of the
clamp voltage on the high impedance node. V
H
decreases
by 2V
BE
(Q
N6
and Q
P6
) to set up the base voltage on Q
P5
.
Q
P5
begins to conduct whenever the high impedance node
Negative Clamp Range
B
25
-
-5.0 to +2.0
-
V
Positive Clamp Range
B
25
-
-2.0 to +5.0
-
V
Clamp Input Bias Current
A
25
-
50
200
μ
A
Clamp Input Bandwidth
V
H
or V
= 100mV
P-P
B
25
-
500
-
MHz
NOTES:
2. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only.
3. See Typical Performance Curves for more information.
Electrical Specifications
V
SUPPLY
=
±
5V, A
V
= +1, R
F
= 510
, R
L
= 100
, Unless Otherwise Specified
(Continued)
PARAMETER
TEST
CONDITIONS
(NOTE 2)
TEST
LEVEL
TEMP.
(
o
C)
MIN
TYP
MAX
UNITS
A
CL
+1
R
F
(
)
510
BW (MHz)
850
-1
430
580
+2
360
670
+5
150
520
+10
180
240
+19
270
125
+1
+IN
V-
V+
Q
P1
Q
N1
V-
Q
N3
Q
P3
Q
P4
Q
N2
Q
P2
Q
N4
Q
P5
Q
N5
Z
V+
-IN
V
OUT
I
CLAMP
R
F
(EXTERNAL)
Q
P6
Q
N6
V
H
R
1
50K
(30K
FOR V
L
)
200
FIGURE 1. HFA1130 SIMPLIFIED V
H
CLAMP CIRCUITRY
HFA1130
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相關(guān)代理商/技術(shù)參數(shù) |
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| HFA1130IB96 | 功能描述:IC BUFFER CFA 850MHZ 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5 |
| HFA1130IBZ | 功能描述:運算放大器 - 運放 W/ANL OPAMP 850MHZ CFB CLMP IND RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| HFA1130IBZ | 制造商:Intersil Corporation 功能描述:Operational Amplifier (Op-Amp) IC |
| HFA1130IBZ-T | 功能描述:運算放大器 - 運放 W/ANL OPAMP 850MHZ CFB CLMP IND RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| HFA1130IJ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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