參數(shù)資料
型號(hào)： TSH75CPT
廠(chǎng)商： STMICROELECTRONICS
元件分類(lèi)： 音頻／視頻放大
英文描述： 1 CHANNEL, VIDEO AMPLIFIER, PDSO16
封裝： TSSOP-16
文件頁(yè)數(shù)： 16/33頁(yè)
文件大?。?/td> 601K
代理商： TSH75CPT
TSH70,71,72,73,74,75
Testing Conditions
23/33
5.4
Precautions when operating on an asymmetrical supply
The TSH7X can be used with either a dual or a single supply. If a single supply is used, the
inputs are biased to the mid-supply voltage (+VCC/2). This bias network must be carefully
designed, in order to reject any noise present on the supply rail.
As the bias current is 15uA, you must carefully choose the resistance R1 so as not to
introduce an offset mismatch at the amplifier inputs.
Figure 49. Schematic of asymmetrical (single) supply
R1 = 10K
is a typical and convenient value. C1, C2, C3 are bypass capacitors that filter
perturbations on VCC, as well as for the input and output signals. We choose C1 = 100nF
and C2 = C3 = 100uF.
R2, R3 are such that the current through them must be greater than 100 times the bias
current. Therefore, we set R2 = R3 = 4.7K
.
Diff Gain Step1
-0.5
-0.3
%
Diff Gain Step2
-0.7
-0.6
%
Diff Gain Step3
-0.3
-0.5
%
Diff Gain Step4
-0.1
-0.3
%
Diff Gain Step5
-0.4
-0.5
%
Diff Phase pos
0
0.1
deg
Diff Phase neg
-0.2
-0.4
deg
Diff Phase pp
0.2
0.5
deg
Diff Phase Step1
-0.2
-0.4
deg
Diff Phase Step2
-0.1
-0.4
deg
Diff Phase Step3
-0.1
-0.3
deg
Diff Phase Step4
0
0.1
deg
Diff Phase Step5
-0.2
-0.1
deg
Table 7.
Video results
Parameter
Value
VCC =
±2.5V
Value
VCC =
±5V
Unit
IN
R1
Vcc+
OUT
R2
R3 C1
C3
C2
Cin
Cout
+
-
Cf
R5
R4
RL
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