CSP1027 datasheet(53/64 Pages) AGERE

53 / 64 page

Lucent Technologies Inc.

Data Sheet

CSP1027 Voice Band Codec for

December 1999

Cellular Handset and Modem Applications

10 Analog Characteristics and Requirements (continued)

10.3 Digital-to-Analog Path

Notes:

The D/A signal to distortion plus noise ratio decreases by 3 dB for each 3 dB gain step below 0 dB. The D/A SDNR is specified with a differential

load. For a single-ended load, the D/A SDNR is degraded by about 6 dB.

The D/A signal to distortion plus noise ratio is valid for sampling rates up to 16 kHz. For sampling rates between 16 kHz and 24 kHz, the signal

to distortion plus noise ratio is no better than 60 dB.

Table 19. D/A Signal to Distortion Plus Noise Ratio (0 dB Output Setting)

Output Signal Level

Min

Max

Unit

0 dBm0

—

–10 dBm0

—

–30 dBm0

—

–40 dBm0

—

–45 dBm0

—

–55 dBm0

—

Table 20. D/A Relative Gain Accuracy*

* Gain is relative to the 0 dBm0 signal level. Absolute gain accuracy at the 0 dBm0 signal level is ±0.18 dB. Digital-to-analog path gain is spec-

ified with a differential load; a single-ended load adds ±0.1 dB to absolute gain.

Output Signal Level

Min

Max

Unit

+3 dBm0 to –40 dBm0

–0.1

0.1

–40 dBm0 to –50 dBm0

–0.4

0.4

–50 dBm0 to –55 dBm0

–1.2

1.2

Table 21. D/A Output Gain Adjustment

Gain Setting

Min

Typ

Max

Unit

0 dB

–0.2

0.2

–3 dB

–3.21

–3.01

–2.81

–6 dB

–6.22

–6.02

–5.82

–9 dB

–9.23

–9.03

–8.83

–12 dB

–12.24

–12.04

–11.84

–42 dB

–42.34

–42.14

–41.94

–45 dB

–45.35

–45.15

–44.95

CSP1027 Datasheet(PDF) 53 Page - Agere Systems

CSP1027 Datasheet(HTML) 53 Page - Agere Systems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Datasheet Download

Link URL