TSH330 STMicroelectronics, TSH330 Datasheet - Page 15

• Manufacturer Part Number: TSH330
• Description: Low noise, very large bandwidth op-amp
• Manufacturer: STMicroelectronics

Specifications of TSH330

• Bandwidth: 1.1GHz (Gain=+2)
• Quiescent Current: 16.6 mA
• Slew Rate: 1800V/µs
• Input Noise: 1.3nV/√Hz
• Distortion: SFDR = -78dBc (10MHz, 2Vp-p)

Intermodulation Distortion Product
6 Intermodulation Distortion Product
The non-ideal output of the amplifier can be described by the following series:
due to non-linearity in the input-output amplitude transfer, where the input is V
component, C
A one-frequency (one-tone) input signal contributes to harmonic distortion. A two-tone input signal
contributes to harmonic distortion and to the intermodulation product.
The study of the intermodulation and distortion for a two-tone input signal is the first step in characterizing
the driving capability of multi-tone input signals.
In this case:
then:
From this expression, we can extract the distortion terms, and the intermodulation terms form a single
sine wave: second-order intermodulation terms IM2 by the frequencies (
amplitude of C2A
The measurement of the intermodulation product of the driver is achieved by using the driver as a mixer
by a summing amplifier configuration (see
mixing device is avoided.
Figure 34. Inverting summing amplifier (using evaluation board SO8_S_MULTI)
1
+2
2
) and (
V out
=
1
(V
C 0
1
in
2
) is the fundamental and C
+
and third-order intermodulation terms IM3 by the frequencies (2
C 1 A
2
) with an amplitude of (3/4)C3A
sin
1 t
V
V
V
V
+
in
in
Vout
V in
in
in
A
1
1
2
2
sin
=
=
A
2 t
C 0
sin
R
R
R
R
Figure 34
+
1
1
2
2
+
C 2 A
1 t
C 1 V in
n
R
R
is the amplitude of the harmonics of the output signal V
+
A
sin
sin
+
). In this way, the non-linearity problem of an external
+
+
_
_
3
C 2 V
1 t
.
2 t
R
R
+
fb
fb
2
A
in
sin
+
2 t
C n V
2
V
V
n
out
out
in
+
100
100
C n A
1
sin
-
2
in
1 t
) and (
=Asin t, C
+
A
1
-
sin
2
), (2
1
2 t
0
n
2
is the DC
TSH330
) with an
1
2
15/19
), (
out
.