MC145402

MOTOROLA

11

(1020 Hz REFERENCED TO 600

INPUT LEVEL (dBm0)

Ω)

80

70

60

50

40

30

20

10

0

– 60

– 50

– 40

– 30

– 20

– 10

0

10

13–BIT

12–BIT

11–BIT

10–BIT

9–BIT

f MSI/2

COMPARED TO 9–13 BIT IDEAL A/D; MSI = 8 kHz;

MEASURED THROUGH A LOW–PASS FILTER

WITH A BANDWIDTH OF

Figure 4. MC145402 Encoder (A/D) Signal to Noise Plus Distortion Ratio

(1020 Hz REFERENCED TO 600

INPUT LEVEL (dBm0)

Ω)

80

70

60

50

40

30

20

10

0

– 60

– 50

– 40

– 30

– 20

– 10

0

10

13–BIT

12–BIT

11–BIT

10–BIT

9–BIT

f MSI/2

COMPARED TO 9–13 BIT IDEAL D/A; MSI = 8 kHz;

MEASURED THROUGH A LOW–PASS FILTER

WITH A BANDWIDTH OF

Figure 5. MC145402 Decoder (D/A) Signal to Noise Plus Distortion Ratio