Z0220112VSGR4078 Zilog, Z0220112VSGR4078 Datasheet - Page 27

• Manufacturer Part Number: Z0220112VSGR4078
• Description: IC MODEM 2400BPS DSP AFE 44-PLCC
• Manufacturer: Zilog

Specifications of Z0220112VSGR4078

• Data Format: V.21, V.22, V.23, Bell 103, Bell 212A
• Baud Rates: 2.4k
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 13. Selectable Configurations (Continued)
Transmitted Data Spectrum
Transmit Levels
Receiver Levels
PS000904-0107
V.21
Bell 212A
Bell 103
Notes:
1. Configuration is selected through the RAM location Config.
2. QAM=Quadrature Amplitude Modulation FSK=Frequency Shift Keying, DPSK=Dual Phase Shift Keying
Note:
The transmitted data spectrum, with compromise equalization disabled, is shaped
in the baseband by the finite impulse response (FIR) filter.
spectrum characteristics.
Table 14. Spectral Shaping
The transmit output level of the Z02201 is programmable in 1 dBm decrements
from –6 dBm to –43 dBm. With a default value of –10 dBm, the Z02201 is
measured differentially across pins TX0+ and TX0– with a sinusoidal waveform.
The timing recovery circuit can track a ±0.01% (100 ppm) frequency error in the
associated transmit timing source with less than 1.0 dB degradation in
performance.
Mode
V.22
V.22bis
Note: The carrier and the spectral shaping are selected automatically according to the
FSK
DPSK
FSK
configuration.
To avoid saturation, the Tx level should be set to –6 dBm or
lower by the host. If a higher transmit level is required,
additional op amps may be added during operation.
Carrier Freq
1200
2400
1080/1750
1200/2400
1170/2125
300
1200
300
Spectral Power Shaping Function
sqrt 75% Raised Cosine at 600 baud
sqrt 75% Raised Cosine at 600 baud
V.22BIS Data Pump with Integrated AFE
300
600
300
1
1
2
Table 14
—
4
—
reflects the
23