DSP56156 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56156

16-bit Digital Signal Processor

Motorola => Freescale 

Freescale Semiconductor, Inc.

Electrical Characteristics and Timing

A/D and D/A Performance

A/D and D/A Performance

(VCCA = 5.0 V dc ± 10%, TJ = -40° to +125°C)

The A/D and D/A performance of the codec section are given in Table 8 with an

example presented in Figure 4.

Table 8 A/D and D/A Performance of Codec

Characteristic

Level

Min

Typ

(See Note 1)

Analog to Digital Section Signal to Noise

0 dBm0

55

65

plus Distortion Ratio (S/N+T)

(See Note 2)

-50 dBm0

15

20

Digital to Analog Section Signal to Noise

0 dB

55

65

plus Distortion Ratio (S/N+T)

-50 dB

15

20

Max

—

—

—

—

Unit

dB

dB

dB

dB

NOTES: 1. 0 dB gain on the A/D and D/A; Codec clock at 1.538 MHz with 128 decimation/interpolation ratio and

tested at 1502 Hz

2. 0 dBm0 corresponds to -3.14 dB below the input saturation level

80

S/N

70

S/N+T

60

50

40

30

20

10

0

13 MHz

2 MHz

÷ 6.5

CCOoDdeEcC COCR=$E400

1 MHz

÷÷13

PLLL

52 MHz

÷÷((1122+1)x*4

SSiginndaBl in dB

Figure 4 Example: S/N and S/N+T Performance for the A/D Section

MOTOROLA

DSP56156 Data Sheet

17

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