ADA4350ARUZ-R7 datasheet(27/38 Pages) AD

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ADA4350

Data Sheet

Rev. B | Page 26 of 37

TEST CIRCUITS

LPF

FUNCTION

GENERATOR

1kΩ

5kΩ

1kΩ

VOUT1

MEASURE

DISTORTION WITH

DIFFERENTIAL

OUTPUT

VOUT2

DIFFERENTIAL GAIN = 1

ADC DRIVER

FET AMP

G = –5

825Ω

500Ω

Figure 48. Harmonic Distortion for Full System

1kΩ

5kΩ

1kΩ

VOUT1

MEASURE PARAMETERS

AT DIFFERENTIAL

OUTPUT

VOUT2

DIFFERENTIAL GAIN = 1

ADC DRIVER

FET AMP

G = –5

825Ω

500Ω

VIN

500Ω

Figure 49. Full System Measurement for Other Parameters

MEASURE

FREQUENCY

RESPONSE

G = 1 +

AC SIGNAL

OF DIFFERENCE

FREQUENCY

FET

AMP

Figure 50. Frequency Response for FET Input Amplifier,

Noninverting Gain Configuration

MEASURE

FREQUENCY

RESPONSE

G =

–RF

FET

AMP

AC SIGNAL

OF DIFFERENCE

FREQUENCY

Figure 51. Frequency Response for FET Input Amplifier,

Inverting Gain Configuration

G = +1

INPUT REFERRED NOISE VN = OUTPUT NOISE

MEASURE OUTPUT

NOISE HERE

Figure 52. Input Referred Voltage Noise for P1

MEASURE OUTPUT

REFERED VOLTAGE

NOISE HERE

INSIDE CHIP

1kΩ

500Ω

1kΩ

Figure 53. Output Referred Voltage Noise for P1 and M1

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