參數(shù)資料
型號(hào): TLV2304IPW
廠商: Texas Instruments, Inc.
元件分類: 比較器
英文描述: FAMILY OF NANOPOWER OPERATIONAL AMPLIFIERS AND OPEN DRAIN COMPARATORS
中文描述: 家庭NANOPOWER運(yùn)算放大器以及漏極開路比較器
文件頁(yè)數(shù): 13/22頁(yè)
文件大?。?/td> 396K
代理商: TLV2304IPW
TLV2302, TLV2304
FAMILY OF NANOPOWER OPERATIONAL AMPLIFIERS
AND OPEN DRAIN COMPARATORS
SLOS343 – DECEMBER 2000
13
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 34. Output Offset Voltage Model
general configurations
When receiving low-level signals, limiting the bandwidth of the incoming signals into the system is often
required. The simplest way to accomplish this is to place an RC filter at the noninverting terminal of the amplifier
(see Figure 35).
VI
VO
C1
+
RG
RF
R1
f–3dB
1
2 R1C1
VO
VI
1
RF
RG
1
1
sR1C1
Figure 35. Single-Pole Low-Pass Filter
If even more attenuation is needed, a multiple pole filter is required. The Sallen-Key filter can be used for this
task. For best results, the amplifier should have a bandwidth that is 8 to 10 times the filter frequency bandwidth.
Failure to do this can result in phase shift of the amplifier.
VI
C2
R2
R1
C1
RF
RG
R1 = R2 = R
C1 = C2 = C
Q = Peaking Factor
(Butterworth Q = 0.707)
(
=
1
Q
2 –
)
RG
RF
_
+
f–3dB
1
2 RC
Figure 36. 2-Pole Low-Pass Sallen-Key Filter
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