参数资料
型号: TSH72CD
厂商: 意法半导体
元件分类: 运动控制电子
英文描述: WIDE BAND, LOW POWER OPERATIONAL AMPLIFIER WITH STANDBY FUNCTION
中文描述: 宽频带低功率运算放大器的待机,功能
文件页数: 19/25页
文件大小: 1096K
代理商: TSH72CD
TSH70, 71, 72, 73, 74, 75
19/25
TESTING CONDITIONS:
Layout precautions:
To use the TSH7X circuits in the best manner at
high frequencies, some precautions have to be
taken for power supplies:
- First of all, the implementation of a proper ground
plane in both sides of the PCB is mandatory for
high speed circuit applications to provide low in-
ductance and low resistance common return.
- Power supply bypass capacitors (4.7uF and ce-
ramic 100pF) should be placed as close as possi-
ble to the IC pins in order to improve high frequen-
cy bypassing and reduce harmonic distortion. The
power supply capacitors must be incorporated for
both the negative and the positive pins.
- Proper termination of all inputs and outputs must
be in accordance with output termination resistors;
then the amplifier load will be only resistive and
the stability of the amplifier will be improved.
All leads must be wide and as short as possible
especially for op amp inputs and outputs in order
to decrease parasitic capacitance and inductance.
- For lower gain application, attention should be
paid not to use large feedback resistance (>1k
)
to reduce time constant with parasitic capacitanc-
es.
- Choose component sizes as small as possible
(SMD).
- Finally, on output, the load capacitance must be
negligible to maintain good stability. You can put a
serial resistance the closest to the output pin to
minimize its influence.
CCIR330 video line
Maximum input level:
The input level must not exceed the following val-
ues:
K
negative peak: must be greater than
-Vcc+400mV.
K
positive peak value: must be lower than
+Vcc-400mV.
The electrical characteristics show the influence of
the load on this parameter.
Video capabilities:
To characterize the differential phase and differ-
ential gain a CCIR330 video line is used.
The video line contains 5 (flat) levels of luma on
which is superimposed chroma signal. (the first
level contains no luma). The luma gives various
amplitudes which define the saturation of the sig-
nal. The chrominance gives various phases which
define the colour of the signal.
Differential phase (respectively differential gain)
distortion is present if a signal chrominance phase
(gain) is affected by luminance level. They repre-
sent the ability to uniformly process the high fre-
quency information at all luminance levels.
When differential gain is present, colour saturation
is not correctly reproduced.
The input generator is the Rohde & Schwarz
CCVS. The output measurement is done by the
Rohde and Schwarz VSA.
Measurement on Rohde and Schwarz VSA.
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