DSP56156 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56156

16-bit Digital Signal Processor

Motorola => Freescale 

Design Considerations

Analog I/O Considerations

Freescale Semiconductor, Inc.

Figure 45 shows three possible single-ended output configurations. Configuration (a) is highly

recommended. For configurations (b) and (c), an AC coupling capacitor is required since the

load resistor is tied to GNDA.

VREF

VCCA

+

47 K¾

-

GNDA

47 K¾

47 K¾

(a)

SPKP

0 < C ð 100 nF

SPKP

Š 500 Ω

0 < C ð 100 nF SPKP

Š 500 Ω

SPKM

NC SPKM

0 < C ð 100 nF

SPKM

Š 500 Ω

(b)

(c)

Figure 45 Single-ended Output Configurations

Figure 46 shows a recommended layout for power and ground planes.

84

57

1

Digital Ground and

Power planes

28

Analog Ground and

Power planes

Figure 46 Ground and Power planes

66

FoDr SMPo5r6e15I6nfDoartma aSthieoent On This Product,

MOTOROLA

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