TS616 datasheet(18/37 Pages) STMICROELECTRONICS

18 / 37 page

Intermodulation distortion product

TS616

18/37

The following graphs show the IM2 and the IM3 of the amplifier in different configurations.

The two-tone input signal was generated by the multisource generator Marconi 2026. Each

tone has the same amplitude. The measurement was performed using a HP3585A

spectrum analyzer.

Figure 46.

Intermodulation vs. output

amplitude

Figure 47.

Intermodulation vs. output

amplitude

-100

-90

-80

-70

-60

-50

-40

-30

IM3

1140kHz, 1170kHz

IM2

770kHz

IM3

340kHz, 430kHz

IM2

30kHz

Differential Output Voltage (Vp-p)

AV = +1.5, Rfb = 1kΩ, VCC = ±2.5 V, RL=14 Ω diff.

370 kHz & 400 kHz

-100

-90

-80

-70

-60

-50

-40

-30

IM3

1140kHz, 1170kHz

IM2

770kHz

IM3

340kHz, 430kHz

IM2

30kHz

Differential Output Voltage (Vp-p)

AV = +1.5, Rfb = 1kΩ, VCC = ±2.5 V, RL=28 Ω diff.

370 kHz & 400 kHz

Figure 48.

Intermodulation vs. gain

Figure 49.

Intermodulation vs. load

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-110

-100

-90

-80

-70

-60

-50

-40

-30

IM2

770kHz

IM3

340kHz, 430kHz, 1140kHz, 1170kHz

IM2

30kHz

Closed Loop Gain (Linear)

Vout= 6 Vpp, VCC = ±2.5 V, RL=20 Ω diff.

370 kHz & 400 kHz

100

120

140

160

180

200

-110

-100

-90

-80

-70

-60

-50

-40

-30

IM2

770kHz

IM3

340kHz, 430kHz, 1140kHz, 1170kHz

IM2

30kHz

Differential Load (

Ω)

AV = +1.5, Rfb = 1kΩ, Vout= .56 Vpp, VCC = ±2.5 V

370 kHz & 400 kHz

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