L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
Electrical Characteristics (continued)
Table 12. 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)3:
PT/PR Current to VITR
291
300
309
V/A
Receive Gain4 (f = 1004 Hz to 1020 Hz):
RCVP or RCVN to PT—PR (gain of 8 option, L9214A)
RCVP or RCVN to PT—PR (gain of 2 option, L9214G)
7.6
1.9
8
2
8.4
2.1
—
—
Gain vs. Frequency (transmit and receive)2, 600 Ω Termination
(Q.552), 1004 Hz, 1020 Hz reference:
200 Hz—300 Hz
300 Hz—3.4 kHz
3.4 kHz—3.6 kHz
–0.30
–0.05
–1.50
–3.00
—
0
0
0
–0.1
—
0.05
0.05
0.05
–0.05
–2.0
dB
dB
dB
dB
dB
3.6 kHz—20 kHz
20 kHz—266 kHz
Gain vs. Level (transmit and receive)2, 0 dBV Reference (Q.552):
–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.
4. Tested per Figure 9. The gain reading is adjusted by the ratio of 696/660 to account for the 36 Ω nominal ac feed resistance.
Agere Systems Inc.
19
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