参数资料
| 型号： | HFA1113IBZ |
| 厂商： | Intersil |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | IC BUFFER 850MHZ 8-SOIC |
| 标准包装： | 98 |
| 放大器类型： | 缓冲器 |
| 电路数： | 1 |
| 转换速率： | 2400 V/µs |
| -3db带宽： | 850MHz |
| 电流 - 输入偏压： | 25µA |
| 电压 - 输入偏移： | 8000µV |
| 电流 - 电源： | 21mA |
| 电流 - 输出 / 通道： | 60mA |
| 电压 - 电源，单路/双路(±)： | 9 V ~ 11 V，±4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
7
FN1342.6
July 11, 2005
Clamp Accuracy
The clamped output voltage will not be exactly equal to the
voltage applied to VH or VL. Offset errors, mostly due to VBE
mismatches, necessitate a clamp accuracy parameter which
is found in the device specifications. Clamp accuracy is a
function of the clamping conditions. Referring again to
Figure 4, it can be seen that one component of clamp
accuracy is the VBE mismatch between the QX6 transistors,
and the QX5 transistors. If the transistors always ran at the
same current level there would be no VBE mismatch, and no
contribution to the inaccuracy. The QX6 transistors are
biased at a constant current, but as described earlier, the
current through QX5 is equivalent to ICLAMP. VBE increases
as ICLAMP increases, causing the clamped output voltage to
increase as well. ICLAMP is a function of the overdrive level
(AVCL x VIN - VOUT CLAMPED), so clamp accuracy degrades
as the overdrive increases. As an example, the specified
accuracy of
±100mV (AV = -1, VH = 1V) for a 1.6X overdrive
degrades to
±240mV for a 3X (200%) overdrive, as shown in
Figure 43.
Consideration must also be given to the fact that the clamp
voltages have an affect on amplifier linearity. The
“Nonlinearity Near Clamp Voltage” curve, Figure 48,
illustrates the impact of several clamp levels on linearity.
Clamp Range
Unlike some competitor devices, both VH and VL have
usable ranges that cross 0V. While VH must be more positive
than VL, both may be positive or negative, within the range
restrictions indicated in the specifications. For example, the
HFA1113 could be limited to ECL output levels by setting
VH = -0.8V and VL = -1.8V. VH and VL may be connected to
the same voltage (GND for instance) but the result won’t be
in a DC output voltage from an AC input signal. A
150mV - 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 (VCLAMP/AVCL) the amplifier will
return to linear operation. A time delay, known as the
Overdrive Recovery Time, is required for this resumption of
linear operation. The plots of “Unclamped Performance” and
“Clamped Performance” (Figures 41 and 42) highlight the
HFA1113’s subnanosecond 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 fixturing. The delta shown is accurate, but
the true HFA1113 propagation delay is 500ps.
Overdrive recovery time is also a function of the overdrive
level. Figure 47 details the overdrive recovery time for
various clamp and overdrive levels.
Typical Performance Curves
VSUPPLY = ±5V, TA = 25
oC, R
L = 100, Unless Otherwise Specified
FIGURE 5. SMALL SIGNAL PULSE RESPONSE
FIGURE 6. LARGE SIGNAL PULSE RESPONSE
AV = +2
200
150
100
50
0
-50
-100
-150
-200
OUT
P
UT
V
O
L
T
A
G
E
(mV
)
TIME (5ns/DIV.)
AV = +2
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
OUT
P
UT
V
O
L
T
A
G
E
(
V
)
TIME (5ns/DIV.)
HFA1113
相关PDF资料 |
PDF描述 |
|---|---|
| HFA1130IBZ | IC OP AMP 850MHZ CFB 8-SOIC |
| HFA1412IP | IC BUFFER QUAD 350MHZ LP 14-DIP |
| HS18 | HEATSINK 12P PDIP |
| HSP-3 | THERMAL PAD TRIPLE PHASE |
| HSP-5 | THERMAL PAD 3-PHASE W/ADHESIVE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HFA1113IBZ96 | 功能描述:运算放大器 - 运放 W/ANNEAL BUFR 850MHZ CFB PRG-GAIN CLMP RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| HFA1113IP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HFA1113MJ/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HFA1113ML/883 | 制造商:Intersil Corporation 功能描述:SP AMP BFFR AMP SGL 20CLCC - Rail/Tube |
| HFA1114 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:850MHz Video Cable Driving Buffer |
发布紧急采购，3分钟左右您将得到回复。