MC145540 Datasheet, PDF (46/116 Pages) Motorola, Inc – ADPCM Codec

4.8 ANALOG TRANSMISSION PERFORMANCE
(VDD = 5 V ±5% Powered by the Charge Pump or Externally; VSS = 0 V; All Analog Signals Referenced to VAG;
0 dBm0 = 0.775 Vrms = + 0 dBm @ 600 Ω; 64 kbps PCM; FST = FSR = 8 kHz; BCLKT = BCLKR = 2.048 MHz;
SPC = 20.48 MHz Synchronous Operation; TA = –40 to +85°C; Unless Otherwise Noted)
Characteristics
Absolute Gain (0 dBm0 @ 1.02 kHz, TA = 25°C)
VDD = 5.0 V
Absolute Gain Variation with Temperature
0° to + 70°C
– 40° to + 85°C
Absolute Gain Variation with Power Supply
VDD = 5 V, ± 5%
Gain vs Level Tone
(Mu-Law, Relative to
– 10 dBm0, 1.02 kHz)
+ 3 to – 40 dBm0
– 40 to – 50 dBm0
– 50 to – 55 dBm0
Gain vs Level Pseudo Noise, CCITT G.714
(A-Law relative to
– 10 to – 40 dBm0
– 10 dBm0)
– 40 to – 50 dBm0
– 50 to – 55 dBm0
Total Distortion, 1.02 kHz Tone
(Mu-Law,
C-Message Weighting)
+ 3 dBm0
0 to – 30 dBm0
– 40 dBm0
– 45 dBm0
Total Distortion Pseudo Noise, CCITT G.714 (A-Law)
– 3 dBm0
– 6 to – 27 dBm0
– 34 dBm0
– 40 dBm0
– 55 dBm0
Idle Channel Noise (for End-to-End and A/D, Note 1)
Mu-Law, C-Message Weighted
A-Law, Psophometric Weighted
Frequency Response
15 Hz
(Relative to 1.02 kHz @ 0 dBm0)
50 Hz
60 Hz
200 Hz
300 to 3000 Hz
3300 Hz
3400 Hz
4000 Hz
4600 to 100,000 Hz
Inband Spurious (1.02 kHz @ 0 dBm0,
Transmit and Receive)
300 to 3000 Hz
Out-of-Band Spurious at RO +
(300 to 3400 Hz @ 0 dBm0 in)
4600 to 7600 Hz
7600 to 8400 Hz
8400 to 100,000 Hz
Idle Channel Noise Selective @ 8 kHz,
Input = VAG, 30 Hz Bandwidth
Absolute Delay @ 1600 Hz
End to End
Min Max
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
33
—
35
—
28
—
24
—
27.5
—
35.0
—
33.1
—
28.2
—
13.2
—
—
19
—
– 70
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
– 48
—
– 30
—
– 40
—
– 30
—
– 70
—
—
A/D
D/A
Min
Max
Min
Max
Unit
dB
– 0.25 0.25 – 0.25 0.25
dB
—
± 0.03
—
± 0.03
—
± 0.05
—
± 0.05
dB
—
± 0.03
—
± 0.04
– 0.3 + 0.3 – 0.2 + 0.2
dB
– 1.0 + 1.0 – 0.4 + 0.4
– 1.6 + 1.6 – 0.8 + 0.8
dB
– 0.25 + 0.25 – 0.25 + 0.25
– 0.60 + 0.30 – 0.30 + 0.30
– 1.0 + 0.45 – 0.45 + 0.45
34
—
34
—
dBC
36
—
36
—
29
—
30
—
25
—
25
—
dB
28
—
28.5
—
35.5
—
36.0
—
33.5
—
34.2
—
28.5
—
30.0
—
13.5
—
15.0
—
—
—
—
—
—
– 1.0
– 0.20
– 0.35
– 0.8
—
—
—
19
– 70
– 40
– 30
– 26
– 0.4
+ 0.15
+ 0.15
0.0
– 14
– 32
– 48
—
—
– 0.5
– 0.5
– 0.5
– 0.5
– 0.20
– 0.35
– 0.8
—
—
—
11
– 78
0
0
0
0
+ 0.15
+ 0.15
0
– 14
– 30
– 48
dBrnC0
dBm0p
dB
dB
dB
—
—
—
– 30
—
—
—
– 40
—
—
—
– 30
—
—
—
– 70 dBm0
—
440
—
330
µs
NOTE: 1. Extrapolated from a 1020 Hz @ – 50 dBm0 distortion measurement to correct for encoder enhancement.
(continued)
4-6
MC145540
MOTOROLA