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AM7945 Fiches technique(PDF) 6 Page - Advanced Micro Devices |
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AM7945 Fiches technique(HTML) 6 Page - Advanced Micro Devices |
6 / 18 page 6 Am7945 Data Sheet ELECTRICAL CHARACTERISTICS The Am7945 device is tested under the following conditions unless otherwise noted: BAT = –48 V, VCC = +5 V, VEE = –5 V, RL = 900 Ω. The device is not tested in Polarity Reversal state. Description Test Conditions (See Note 1) Min Typ Max Unit Note Analog output (VTX) impedance 3 Ω Analog output (VTX) offset 0°C to +70°C –40°C to +85°C –37 –40 +37 +40 mV 4 Analog (RSN) input impedance 300 Hz to 3.4 kHz 1 20 Ω 4 Longitudinal impedance at A or B 35 Ω Overload level 4-wire and 2-wire, Active state –2.5 +2.5 Vpk 2a On hook, RLAC = 900 Ω, Active or OHT state 0.95 Vrms 2b Transmission Performance 2-wire return loss (See Test Circuit D) 200 to 3.4 kHz 26 dB 4, 8 Longitudinal Balance (2-Wire and 4-Wire, See Test Circuit C); RL = 740 Ω at BAT = 48 V Longitudinal to metallic L-T, L-4 normal polarity 200 Hz to 1 kHz 0°C to +70°C –40°C to +85°C 52 50 dB 4 1 kHz to 3.4 kHz 0°C to +70°C –40°C to +85°C 52 50 4 Longitudinal signal generation 4-L 300 Hz to 800 Hz, normal polarity 40 Longitudinal current per pin Active state and OHT state 20 27 mArms Insertion Loss (2- to 4-Wire and 4- to 2-Wire, See Test Circuits A and B) BAT = –48 V, RL = 900 Ω Gain accuracy 0 dBm, 1 kHz 0°C to +70°C –40°C to +85°C –0.15 –0.20 +0.15 +0.20 dB 4 Gain accuracy, OHT state –10 dBm, On hook, RLAC = 900 Ω –1.0 +1.0 4 Variation with frequency 300 to 3.4 kHz, relative to 1 kHz 0°C to +70°C –40°C to +85°C –0.10 –0.15 +0.10 +0.15 4 Gain tracking +7 dBm to –55 dBm, reference 0 dBm 0°C to +70°C –40°C to +85°C –0.10 –0.15 +0.10 +0.15 4 4 Balance Return Signal (4- to 4-Wire, See Test Circuit B) BAT = –48 V, RL = 900 Ω Gain accuracy 0 dBm, 1 kHz 0°C to +70°C –40°C to +85°C –0.15 –0.20 +0.15 +0.20 dB 3 4 Variation with frequency 300 to 3.4 kHz, relative to 1 kHz 0°C to +70°C –40°C to +85°C –0.10 –0.15 +0.10 +0.15 3 4 Gain tracking +3 dBm to –55 dBm, reference 0 dBm 0°C to +70°C –40°C to +85°C –0.10 –0.15 +0.10 +0.15 3, 4 4 Group delay f = 1 kHz 4 µs 4, 8 Total Harmonic Distortion (2- to 4-Wire or 4- to 2-Wire, See Test Circuits A and B) BAT = –48 V, RL = 900 Ω Harmonic distortion 300 Hz to 3.4 kHz 2-wire level = 0 dBm 2-wire level = +7 dBm –64 –55 –50 –40 dB |
Numéro de pièce similaire - AM7945 |
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Description similaire - AM7945 |
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