THS4524MDBTREP datasheet(37/48 Pages) NSC

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100

120

140

-160

10 k

20 k

30 k

40 k

50 k

Frequency (Hz)

V = 5.0 V

G = 1 V/V

R =

1 k

R =

Load = 2 x 49.9

+ 2 pF

2-kHz FFT

100

120

140

-160

10 k

20 k

30 k

40 k

50 k

Frequency (Hz)

V = 5.0 V

G = 1 V/V

R =

1 k

R =

Load = 2 x 49.9

+ 2 pF

10-kHz FFT

THS4524

ADS8321

OCM

5 V

1 nF

-IN

+IN

IN+

IN-

1 kW

49.9 W

0.22 mF

68 pF

1 kW

Open

THS4524-EP

www.ti.com

SBOS609A – JUNE 2012 – REVISED AUGUST 2013

ADC Driver Performance:

Data were taken using the ADS8321 at 100 kSPS

THS4524 and ADS8321 Combined

with input frequencies of 2 kHz and 10 kHz and

Performance

signal levels that were -0.5 dBFS. FFT plots that

illustrate the spectral performance are given in

demonstrate

achievable

performance,

the

Figure 86 and Figure 87. Tabulated ac analysis

THS4524 is tested as the drive amplifier for the

results are listed in Table 7 and compared to the

ADS8321 16-bit SAR ADC. The ADS8321 offers

ADS8321 data sheet typical performance.

excellent ac and dc performance, with ultra-low power

and small size. The circuit shown in Figure 85 was

used to test the performance.

Figure 85. THS4524 and ADS8321 Test Circuit

Figure 86. 2-kHZ FFT

Figure 87. 10-kHz FFT

Table 7. AC Analysis

Configuration

Tone

Signal (dBFS)

SNR (dBc)

THD (dBc)

SINAD (dBc)

SFDR (dBc)

THS4524 and

2 kHz

–0.5

86.7

–97.8

86.4

100.7

ADS8321

10 kHz

–0.5

85.2

–98.1

85.2

102.2

ADS8321 Data

10 kHz

–0.5

–86

sheet (typ)

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