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AM79C02JC 데이터시트(PDF) 11 Page - Advanced Micro Devices |
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AM79C02JC 데이터시트(HTML) 11 Page - Advanced Micro Devices |
11 / 48 page SLAC Products 11 Transmission Characteristics The gain of the receive path is defined to be 0 dB when a 0 dBm0, 1014 Hz PCM sine wave input results in a nominal 1.55 Vrms for µ-law or 1.56 Vrms for A-law analog output. The gain of the transmit path is 0 dB when a 1.55 Vrms for µ-law or 1.56 Vrms for A-law, 1014 Hz sine wave analog input results in a level of 0 dBm0 at the digital output. When relative levels (dBm0) are used in any of the following transmission specifications, the specification holds for any setting of the AX + GX gain from 0 to 12 dB and the AR + GR loss from 0 to 12 dB. Performance specification for settings of the AX + GX gain from 12 to 18 dB and the AR + GR loss from 12 to 18 dB is determined as the device is characterized. Notes: 1. AMD guarantees less than 0.1% of units fall into the last 0.05 dB of these specification numbers. 2. See Figure 1. 3. With f swept between 0 to 300 Hz and 3400 to 12 kHz, any generated output signals other than f are less than –28 dBm0. This specification is valid for either transmission path. 4. AMD guarantees < 0.2% of units are above –46 dB. This relaxed specification applies to only the third harmonic. 5. Intermodulation distortion specification for two signals of same level in the range of –4 dBm0 to –21 dBm0 does not produce 2 • (f1 – f2) component above specified level. 50 Hz IMD specified with 50 Hz signal at –23 dBm0 and signal between 300 Hz to 3400 Hz at –9 dBm0. 6. No single frequency component in the range above 3800 Hz may exceed a level of –55 dBm0. 7. The Group Delay specification is defined as the sum of the minimum values of the group delays for the transmit and the receive paths when the transmit and receive time slots are identical and the B, X, R, and Z filters are disabled. For PCLK frequencies between 1.03 MHz and 1.53 MHz, the group delay may vary from one cycle to the next. See Figure 2. Description Test Conditions Min Typ Max Unit Note Gain accuracy D to A or A to D 0 dBm0, 1014 Hz 25°C to 85°C 0 dB < |path gain| < 6 dB 0°C –40°C –0.20 –0.25 –0.35 +0.20 +0.25 +0.35 dB Gain accuracy D to A or A to D 0 dBm0, 1014 Hz 70°C to 85°C 6 dB < |path gain| < 12 dB 25°C 0°C –40°C –0.20 –0.25 –0.30 –0.35 +0.20 +0.25 +0.30 +0.35 — 1 1 — Gain accuracy analog to analog or digital to digital 25°C to 85°C 0°C –40°C –0.20 –0.25 –0.35 +0.20 +0.25 +0.35 Attenuation distortion 300 Hz to 3400 Hz –0.125 +0.125 2 Single frequency distortion, A to D –46 3 Single frequency distortion, D to A –6 dB < (GR + AR) < 0 dB –40°C to 85°C –12 dB < (GR + AR) < –6 dB 70°C to 85°C –12 dB < (GR + AR) < –6 dB 25°C –12 dB < (GR + AR) < –6 dB 0°C –12 dB < (GR + AR) < –6 dB –40°C –46 –46 –45 –43 –40 3 3 3, 4 3, 4 3, 4 Intermodulation distortion –42 –56 dBr 5 Analog out Idle channel noise Digital out digital looped back weighted unweighted digital input = 0 A-law µ-law analog VIN = 0 A-law µ-law –68 –55 –78 12 –68 19 dBm0p dBm0p dBm0p dBrnc0 dBm0p dBrnc0 6 Crosstalk TX to RX same channel RX to TX 0 dBm0 300 Hz to 3400 Hz –75 –75 TX to TX Crosstalk TX to RX between channels RX to TX RX to RX 0 dBm0 300 Hz to 3400 Hz –76 –78 –76 –78 Group delay PCLK ≥ 1.53 MHz PCLK ≤ 1.03 MHz B, X, R, and Z filters disabled 630 695 µs 7 |
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