TSH81 STMicroelectronics, TSH81 Datasheet - Page 19

• Manufacturer Part Number: TSH81
• Description: Rail-to-rail video op-amp with standby
• Manufacturer: STMicroelectronics

Specifications of TSH81

• 3db-bandwidth: 100MHz
• Slew-rate: 100V/µµ

TSH80, TSH81, TSH82, TSH84
4
Precautions on asymmetrical supply operation
The TSH8x 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 (+V
designed so as to reject any noise present on the supply rail.
As the bias current is 15 µA, you should use a high resistance R1 (approximately 10 kΩ) to
avoid introducing an offset mismatch at the amplifier’s inputs.
Figure 33. Asymmetrical supply schematic diagram
C1, C2, C3 are bypass capacitors intended to filter perturbations from V
capacitor values are appropriate.
R2 and R3 are such that the current through them must be superior to 100 times the bias
current. Therefore, you could use the following resistance values.
C
C
frequency obtained is lower than 10 Hz.
Figure 34. Use of the TSH8x in a gain = -1 configuration
in
out
and C
). With R1 = 10 kΩ , R
C1 = 100 nF and C2 = C3 = 100 µF
R2 = R3 = 4.7 kΩ
out
are chosen to filter the DC signal by the low pass filters (R1, C
IN
IN
out
Cin
Cin
R1
R1
= R
Doc ID 9413 Rev 5
R2
R3
R2
R3
L
= 150 Ω, and C
C1
C1
Vcc+
Vcc+
Precautions on asymmetrical supply operation
C2
C2
C3
C3
1 k
CC
in
/2). This bias network must be carefully
R4
+
-
+
= 2 µF, C
-
1 k
Cf
Cf
R5
Cout
Cout
out
AM00845
AM00846
OUT
OUT
= 220 µF the cutoff
RL
RL
CC
. The following
in
) and (R
out
19/27
,