ADS7844

5

SBAS100A

www.ti.com

TYPICAL PERFORMANCE CURVES:+5V

At TA = +25°C, +VCC = +5V, VREF = +5V, fSAMPLE = 200kHz, and fCLK = 16 • fSAMPLE = 3.2MHz, unless otherwise noted.

0

–20

–40

–60

–80

–100

–120

FREQUENCY SPECTRUM

(4096 Point FFT; fIN = 1,123Hz, –0.2dB)

0

100

25

75

50

Frequency (kHz)

0

–20

–40

–60

–80

–100

–120

FREQUENCY SPECTRUM

(4096 Point FFT; fIN = 10.3kHz, –0.2dB)

0

100

25

75

50

Frequency (kHz)

SIGNAL-TO-NOISE RATIO AND SIGNAL-TO-

(NOISE+DISTORTION) vs INPUT FREQUENCY

10

1

100

Input Frequency (kHz)

74

73

72

71

70

69

68

SINAD

SNR

SPURIOUS FREE DYNAMIC RANGE AND TOTAL

HARMONIC DISTORTION vs INPUT FREQUENCY

10

1

100

Input Frequency (kHz)

85

80

75

70

65

–85

–80

–75

–70

–65

THD

SFDR

12.0

11.8

11.6

11.4

11.2

11.0

EFFECTIVE NUMBER OF BITS

vs INPUT FREQUENCY

10

1

100

Input Frequency (kHz)

CHANGE IN SIGNAL-TO-(NOISE+DISTORTION)

vs TEMPERATURE

–20

–40

100

Temperature (°C)

0.4

0.2

0.0

–0.2

–0.4

–0.6

0.6

0

20

40

60

80

f

IN = 10kHz, –0.2dB