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L7554 Datasheet(PDF) 10 Page - Agere Systems |
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L7554 Datasheet(HTML) 10 Page - Agere Systems |
10 / 28 page 10 Lucent Technologies Inc. Data Sheet March 1997 L7554 Low-Power SLIC Electrical Characteristics (continued) Table 8. ac Feed Characteristics 1. Set by external components. Any complex impedance R1 + R2 || C between 150 Ω and 1300 Ω can be synthesized. 2. This parameter is not tested in production. It is guaranteed by design and device characterization. 3. Return loss and transhybrid loss are functions of device gain accuracies and the external hybrid circuit. Guaranteed performance assumes 1% tolerance of external components. Parameter Min Typ Max Unit ac Termination Impedance1 150 — 1300 Ω Longitudinal Impedance2 — 40 46 Ω Total Harmonic Distortion—200 Hz to 4 kHz2 Off-hook On-hook — — — — 0.3 1.0 % % Transmit Gain, f = 1 kHz (PT/PR to VITR) Transmit Accuracy in dB, 25 °C Transmit Accuracy in dB, Full Temperature Range — –0.15 –0.22 –400 0 0 — 0.15 0.22 V/A dB dB Receive + Gain, f = 1 kHz (RCVP to PT/PR) Receive – Gain, f = 1 kHz (RCVN to PT/PR) Receive Accuracy in dB, 25 °C Receive Accuracy in dB, Full Temperature Range — — –0.18 –0.25 8.00 –8.00 0 0 — — 0.18 0.25 – – dB dB Gain vs. Frequency (transmit and receive) (600 Ω termination; reference 1 kHz2) 200 Hz to 300 Hz 300 Hz to 3.4 kHz 3.4 kHz to 16 kHz 16 kHz to 266 kHz –1.00 –0.3 –0.5 — 0.0 0.0 –0.1 — 0.05 0.05 0.3 2.0 dB dB dB dB Gain vs. Level (transmit and receive)(reference 0 dBV2) –50 dB to +3 dB –0.05 0 0.05 dB Return Loss3 200 Hz to 500 Hz 500 Hz to 3400 Hz 20 26 24 29 — — dB dB 2-wire Idle-channel Noise (600 Ω termination) Psophometric C-message 3 kHz Flat — — — –87 2 10 –77 12 20 dBmp dBrnC dBrn Transmit Idle-channel Noise Psophometric C-message 3 kHz flat — — — –82 7 15 –77 12 20 dBmp dBrnC dBrn Transhybrid Loss3 200 Hz to 500 Hz 500 Hz to 3400 Hz 21 26 24 29 — — dB dB |
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