1997 Apr 03

16

Philips Semiconductors

Product specification

ADPCM CODEC for digital cordless

telephones

PCD5032

11 FILTER CHARACTERISTICS

Notes

1. Frequency band is 300 Hz to 3400 Hz. Maximum load capacitance = 100 pF differentially, or 200 pF each pin.

−40 dBm0 on PCM interface; 0.4 mV (RMS) on analog input. Gain setting is 0 dB.

3. Group delay includes ADPCM/PCM conversion; signal frequency = 1.5 kHz. Value given is for RAS/TAS signals

asserted simultaneously.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Transmitter

passband ripple

(300 to 3000 Hz)

−−

0.5

dB

frequency response

f = 50 Hz

−35

−−2dB

f = 3400 Hz

−35

−−2dB

f = 4600 Hz

−35

−−2dB

f = 8000 Hz

−60

−−2dB

Analog-to-Digital converter

S/N

signal-to-noise ratio

Fig.10; notes 1 and 2

35

−−

dB

Digital-to-Analog converter

S/N

signal-to-noise ratio

Fig.10; notes 1 and 2

35

−−

dB

Group delay

transmitter

note 3

−−

400

µs

receiver

note 3

−−

525

µs

group delay distortion (Loop 1)

Fig.11

tbf

tbf

tbf

µs

handbook, halfpage

MGK078

22

27

33

10

0

20

30

40

50

60

70

80

−60

−70

−50 −40 −30 −20 −10 0 +10

input level (dBm0)

S/(N

+ THD)

G.712

Fig.10 Typical performance of AD and DA in

cascade.

handbook, halfpage

MGK077

0.0

td(g)

250.0

µs

500.0

µs

750.0

µs

1.0 ms

1.5 ms

1.75 ms

1.25 ms

300

500

600 1000

1500

2600

2800

3400

CCITT G.712

frequency (Hz)

Fig.11 Group delay distortion: Transmit and

Receive (loop measurement).