參數(shù)資料
型號: THS4041CDGNG4
廠商: Texas Instruments, Inc.
英文描述: 165-MHz C-STABLE HIGH-SPEED AMPLIFIERS
中文描述: 165兆赫的C -穩(wěn)定高速放大器
文件頁數(shù): 17/28頁
文件大?。?/td> 479K
代理商: THS4041CDGNG4
THS4041, THS4042
165-MHz C-STABLE HIGH-SPEED AMPLIFIERS
SLOS237B– MAY 1999 – REVISED FEBRUARY 2000
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
offset voltage
The output offset voltage, (V
OO
) is the sum of the input offset voltage (V
IO
) and both input bias currents (I
IB
) times
the corresponding gains. The following schematic and formula can be used to calculate the output offset
voltage:
VOO
VIO
1
RF
RG
IIB
RS
1
RF
RG
IIB–RF
+
VI
+
RG
RS
RF
IIB–
VO
IIB+
Figure 67. Output Offset Voltage Model
optimizing unity gain response
Internal frequency compensation of the THS404x was selected to provide very wideband performance yet still
maintain stability when operated in a noninverting unity gain configuration. When amplifiers are compensated
in this manner there is usually peaking in the closed loop response and some ringing in the step response for
very fast input edges, depending upon the application. This is because a minimum phase margin is maintained
for the G=+1 configuration. For optimum settling time and minimum ringing, a feedback resistor of 200
should
be used as shown in Figure 68. Additional capacitance can also be used in parallel with the feedback resistance
if even finer optimization is required.
_
+
THS404x
200
Input
Output
Figure 68. Noninverting, Unity Gain Schematic
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