CSP1027 Datasheet, PDF (54/64 Pages) Agere Systems – CSP1027 Voice Band Codec for Cellular Handset and Modem Applications

CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
Data Sheet
December 1999
10 Analog Characteristics and Requirements (continued)
Table 22. D/A Frequency Response Relative to 1 kHz Output Level (fOS = 1 MHz and fS = 8 kHz)
Frequency
High-Pass Filter Enabled High-Pass Filter Disabled
Unit
(HPFE = 0)
(HPFE = 1)
50 Hz
60 Hz
100 Hz
200 Hz
300 Hz
3000 Hz
3400 Hz
4000 Hz
4600 Hz
8000 Hz
Min
Max
Min
Max
—
–40
–0.25
0.25
dB
—
–40
–0.25
0.25
dB
–34
–18
–0.25
0.25
dB
–12
0
–0.25
0.25
dB
–0.25
0.25
–0.25
0.25
dB
–0.25
0.25
–0.25
0.25
dB
–0.9
0.25
–0.9
0.25
dB
—
–6
—
–6
dB
—
–35
—
–35
dB
—
–45
—
–45
dB
10.4 Miscellaneous
Table 23. Other Analog Characteristics and Requirements*
Parameter
Min
D/A Differential Output Resistance (0 kHz to 4 kHz)
—
D/A Single-ended Output Resistance (0 kHz to 4 kHz)
—
Analog-to-Digital Power Supply Rejection Ratio at 3 kHz
30
Digital-to-Analog Power Supply Rejection Ratio at 3 kHz
40
Analog Input Coupling Capacitor Input Leakage Current
—
Idle Channel Noise at Analog-to-Digital Output with Input Gain Setting of
—
500 mVp or 160 mVp
Idle Channel Noise at Digital-to-Analog Output
—
A/D to D/A and D/A to A/D Crosstalk
—
Digital-to-Analog Image Frequency Attenuation Above 4600 Hz
35
Digital-to-Analog Output Amplifier Differential Swing for 2 kΩ Load
—
Codec Filter Group Delay for Frequencies Less than 800 Hz
—
Codec Filter Group Delay for Frequencies Greater than 800 Hz
—
Recovery Time of Digital-to-Analog Output Due to a Change from Inac-
—
tive Mode to Active Mode, Muted to Not Muted, or Change in Output
Gain (See cioc0 register, ACTIVE, MUTE, OGSEL.)
Recovery Time of Analog-to-Digital PCM Output and VREG Due to a
—
Change from Inactive Mode to Active Mode (See cioc0 register,
ACTIVE.)
Recovery Time of Analog Circuits Due to a Change in Input Select or
—
Input Range (See cioc0 register, INSEL and IRSEL.)
Allowable CLK Input Jitter
–5
Allowable CLK Frequency Error
–1
Max
Unit
12
Ω
6
Ω
—
dB
—
dB
30
nA
–65
dBm0
300
µVrms
–65
dB
—
dB
1.5
Vrms
2.8
ms
0.8
ms
100
ms
600
ms
100
ms
5
ns
1
%
* The codec is intended to drive a floating 2 kΩ load, such as a telephone handset speaker, or 1 kΩ loads ac-coupled to ground on both ana-
log outputs. Since the codec outputs AOUTP and AOUTN have common-mode dc voltage, ac coupling must be used if there is a dc path to
VDD or VSS (ground) through the load.
54
Lucent Technologies Inc.