L9215A/G
Short-Loop Sine Wave Ringing SLIC
Data Sheet
September 2001
Electrical Characteristics (continued)
Table 13. ac Feed Characteristics
Parameter
Min
Typ
Max
Unit
ac Termination Impedance1
150
600
1400
Ω
Total Harmonic Distortion (200 Hz—4 kHz)2:
Off-hook
On-hook
—
—
—
—
0.3
1.0
%
%
Transmit Gain (f = 1004 Hz, 1020 Hz, current limit)3:
PT/PR Current to VITR
300 – 3%
300
300 + 3%
V/A
Receive Gain, f = 1004 Hz, 1020 Hz Open Loop:
RCVP or RCVN to PT—PR (gain of 8 option, L9215A)
RCVP or RCVN to PT—PR (gain of 2 option, L9215G)
7.76
1.94
8
2
8.24
2.06
—
—
Gain vs. Frequency (transmit and receive)2 600 Ω Termination,
1004 Hz, 1020 Hz Reference:
200 Hz—300 Hz
300 Hz—3.4 kHz
3.4 kHz—20 kHz
–0.3
–0.05
–3.0
—
0
0
0
0.05
0.05
0.05
2.0
dB
dB
dB
dB
20 kHz—266 kHz
—
Gain vs. Level (transmit and receive)2 0 dBV Reference:
–55 dB to +3.0 dB
–0.05
0
0.05
dB
Idle-channel Noise (tip/ring) 600 Ω Termination:
Psophometric
C-Message
3 kHz Flat
—
—
—
–82
8
—
–77
13
20
dBmp
dBrnC
dBrn
Idle-channel Noise (VTX) 600 Ω Termination:
Psophometric
C-Message
3 kHz Flat
—
—
—
–82
8
—
–77
13
20
dBmp
dBrnC
dBrn
1. Set externally either by discrete external components or a third- or fourth-generation codec. Any complex impedance R1 + R2 || C between
150 Ω and 1400 Ω can be synthesized.
2. This parameter is not tested in production. It is guaranteed by design and device characterization.
3. VITR transconductance depends on the resistor from ITR to VTX. This gain assumes an ideal 4750 Ω, the recommended value. Positive cur-
rent is defined as the differential current flowing from PT to PR.
Agere Systems Inc.
19
AGERE [ AGERE SYSTEMS ]
