ML145505 Просмотр технического описания (PDF) - LANSDALE Semiconductor Inc.

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ML145505

PCM Codec–Filter Mono–Circuit

LANSDALE Semiconductor Inc. 

ML145502, ML145503, ML145505

LANSDALE Semiconductor, Inc.

ANALOG TRANSMISSION PERFORMANCE

(VDD = + 5 V ± 5%, VSS = – 5 V ± 5%, VLS = VAG = 0 V, Vref = RSI = VSS (Internal 3.15 V Reference), 0 dBm0 = 1.546 Vrms = + 6 dBm @

600 Ω, TA = – 40 to + 85°C, TDC = RDC = CC = 2.048 MHz, TDE = RCE = MSI = 8 kHz, Unless Otherwise Noted)

End–to–End

A/D

D/A

Characteristic

Min Max Min Max Min Max Unit

Absolute Gain (0 dBm0 @ 1.02 kHz, TA = 25°C, VDD = 5 V, VSS = – 5 V) —

Absolute Gain Variation with Temperature 0 to + 70°C

—

— – 0.30 + 0.30 – 0.30 + 0.30 dB

—

— ± 0.03 — ± 0.03 dB

Absolute Gain Variation with Temperature – 40 to +85°C

—

—

—

± 0.1

—

± 0.1

dB

Absolute Gain Variation with Power Supply (VDD = 5 V, VSS = – 5 V, 5%) —

—

— ± 0.02 — ± 0.02 dB

Gain vs Level Tone (Relative to – 10 dBm0, 1.02 kHz) + 3 to – 40 dBm0 – 0.4 + 0.4 – 0.2 + 0.2 – 0.2 + 0.2

dB

– 40 to – 50 dBm0 – 0.8 + 0.8 – 0.4 + 0.4 – 0.4 + 0.4

– 50 to – 55 dBm0 – 1.6 + 1.6 – 0.8 + 0.8 – 0.8 + 0.8

Gain vs Level Pseudo Noise (A–Law Relative to – 10 dBm0)

CCITT G.714

– 10 to – 40 dBm0 —

– 40 to – 50 dBm0 —

– 50 to – 55 dBm0 —

dB

— – 0.25 + 0.25 – 0.25 + 0.25

— – 0.30 + 0.30 – 0.30 + 0.30

— – 0.45 + 0.45 – 0.45 + 0.45

Total Distortion – 1.02 kHz Tone (C–Message)

0 to – 30 dBm0 35

—

36

—

36

—

dBC

– 40 dBm0 29

—

29

—

30

—

– 45 dBm0 24

—

24

—

25

—

Total Distortion With Pseudo Noise (A–Law)

CCITT G.714

– 3 dBm0 27.5 —

28

—

28.5

—

dB

– 6 to – 27 dBm0 35

—

35.5

—

36

—

– 34 dBm0 33.1

—

33.5

—

34.2

—

– 40 dBm0 28.2

—

28.5

—

30.0

—

– 55 dBm0 13.2

—

13.5

—

15.0

—

Idle Channel Noise (For End–End and A/D, See Note 1)

Mu–Law, C–Message Weighted —

15

—

15

—

9 dBrnC0

A–Law, Psophometric Weighted —

– 69

—

– 69

—

– 78 dBm0p

Frequency Response (Relative to 1.02 kHz @ 0 dBm0)

15 to 60 Hz —

– 23

—

– 23

—

0.15

dB

300 to 3000 Hz – 0.3 + 0.3 – 0.15 + 0.15 – 0.15 + 0.15

3400 Hz – 1.6

0

– 0.8

0

– 0.8

0

4000 Hz —

– 28

—

– 14

—

– 14

4600 Hz —

– 60

—

– 32

—

– 30

Inband Spurious (1.02 kHz @ 0 dBm0, Transmit and RxO)

—

—

—

– 43

—

– 43 dBm0

300 to 3000 Hz

Out–of–Band Spurious at RxO (300 – 3400 Hz @ 0 dBm0 In)

dB

4600 to 7600 Hz —

– 30

—

—

—

– 30

7600 to 8400 Hz —

– 40

—

—

—

– 40

8400 to 100,000 Hz —

– 30

—

—

—

– 30

Idle Channel Noise Selective @ 8 kHz, Input = VAG, 30 Hz Bandwidth

Absolute Delay @ 1600 Hz (TDC = 2.048 MHz, TDE = 8 kHz)

—

– 70

—

—

—

– 70 dBm0

—

—

—

310

—

180

µs

Group Delay Referenced to 1600 Hz (TDC = 2048 kHz,

µs

TDE = 8 kHz)

500 to 600 Hz —

—

—

200 – 40

—

600 to 800 Hz —

—

—

140 – 40

—

800 to 1000 Hz —

—

—

70

– 30

—

1000 to 1600 Hz —

—

—

40

– 20

—

1600 to 2600 Hz —

—

—

75

—

90

2600 to 2800 Hz —

—

—

110

—

120

2800 to 3000 Hz —

—

—

170

—

160

Crosstalk of 1020 Hz @ 0 dBm0 From A/D or D/A (Note 2)

—

—

—

– 75

—

– 80

dB

Intermodulation Distortion of Two Frequencies of Amplitudes – 4 to

– 21 dBm0 from the Range 300 to 3400 Hz

—

—

—

– 41

—

– 41

dB

NOTES:

1. Extrapolated from a 1020 Hz @ – 50 dBm0 distortion measurement to correct for encoder enhancement.

2. Selectively measured while the A/D is stimulated with 2667 Hz @ – 50 dBm0.

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