PCD5032 Datasheet, PDF (16/24 Pages) NXP Semiconductors – ADPCM CODEC for digital cordless telephones

Philips Semiconductors
ADPCM CODEC for digital cordless
telephones
Product specification
PCD5032
11 FILTER CHARACTERISTICS
V_DD = 2.7 to 5.5 V; V_SS = 0 V; T_amb = −25 to +70 °C.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP. MAX. UNIT
Transmitter
R_PB
passband ripple
(300 to 3000 Hz)
frequency response
f = 50 Hz
f = 3400 Hz
f = 4600 Hz
f = 8000 Hz
−
−
−35
−
−35
−
−35
−
−60
−
0.5
dB
−2
dB
−2
dB
−2
dB
−2
dB
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
t_d(TX)
t_d(RX)
t_d(g)
transmitter
receiver
group delay distortion (Loop 1)
note 3
note 3
Fig.11
−
−
400
µs
−
−
525
µs
tbf
tbf
tbf
µs
Notes
1. Frequency band is 300 Hz to 3400 Hz. Maximum load capacitance = 100 pF differentially, or 200 pF each pin.
2. Measured with psophometric filter (CCITT G.223). Only fulfilled at V_DD noise level less than 40 mV (peak value)
(0 to 20 kHz). Measured on sample basis at V_DD = 3.0 V,T_amb = 25 °C, compliant with G.712. Signal level is
−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.
handbook, halfpage ₈₀
70
S/(N + THD)
60
50
40
33
30 ₂₇
20 ²²
10
G.712
0
−70 −60 −50 −40 −30 −20 −10 0 +10
input level (dBm0)
MGK078
Fig.10 Typical performance of AD and DA in
cascade.
handbook,¹h^.7al⁵fp^mag^se
td(g) ^{1.5 ms}
1.25 ms
1.0 ms
750.0 µs
500.0 µs
250.0 µs
CCITT G.712
0.0
300 600 1000
500
1500
frequency (Hz)
2600
2800
3400
MGK077
Fig.11 Group delay distortion: Transmit and
Receive (loop measurement).
1997 Apr 03
16