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TLV320AC56DW Datasheet(PDF) 7 Page - Texas Instruments |
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TLV320AC56DW Datasheet(HTML) 7 Page - Texas Instruments |
7 / 23 page TLV320AC56, TLV320AC57 3-V VOICE-BAND AUDIO PROCESSORS (VBAP ™) SLWS044B – JUNE 1996 – REVISED OCTOBER 1997 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 transmit gain and dynamic range, companded mode ( µ-law or A-law) or linear mode selected, VCC = 3 V, TA = 25°C (unless otherwise noted) (see Notes 5 and 6) PARAMETER TEST CONDITIONS MIN MAX UNIT Companded mode selected, µ-law (’AC56) 0.614 Transmit reference-signal level (0 dB) (see Note 7) Companded mode selected, A-law (’AC57) 0.616 Vrms Linear mode selected (’AC56 and ’AC57) 0.626 Companded mode selected, µ-law (’AC56) 2.5 Overload-signal level (MICIN at unity gain) Companded mode selected, A-law (’AC57) 2.5 Vpp Linear mode selected (’AC56 and ’AC57) 2.5 Absolute gain error 0-dB input signal ±1 dB MICIN to DOUT at 0 dBm0 to – 40 dBm0 ±0.5 Gain error with input level relative to gain at –10 dBm0 MICIN to DOUT at – 41 dBm0 to – 50 dBm0 ±1.5 dB MICIN to DOUT at – 51 dBm0 to – 55 dBm0 ±2 Gain variation VCC ± 10%, TA = 0°C to 70°C ±0.5 dB NOTES: 5. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel under test. 6. The input amplifier is set for inverting unity gain. 7. The reference-signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 2 V. transmit filter transfer, companded mode ( µ-law or A-law) or linear mode selected, over recommended ranges of supply voltage and free-air temperature, CLK = 2.048 MHz, FSX = 8 kHz (see Note 6) PARAMETER TEST CONDITIONS MIN MAX UNIT fMICIN = 50 Hz –10 0 fMICIN = 200 Hz –2.8 0 Input amplifier set for unity gain, fMICIN = 300 Hz to 3 kHz ±0.25 Gain relative to input signal gain at 1.02 kHz In ut am lifier set for unity gain, noninverting maximum gain output i l MICIN i dB fMICIN = 3.3 kHz – 0.55 0.2 dB signal at MICIN is 0 dB fMICIN = 3.4 kHz –1 – 0.1 fMICIN = 4 kHz –14 fMICIN ≥ 4.6 kHz –32 NOTE 6. The input amplifier is set for inverting unity gain. transmit idle channel noise and distortion, companded mode with µ-law or A-law selected, over recommended ranges of supply voltage and operating free-air temperature (see Note 8) PARAMETER TEST CONDITIONS MIN MAX UNIT Transmit noise, psophometrically weighted MICIN connected to MICGS through a 10-k Ω resistor –72 dBm0p Transmit noise, C-message weighted MICIN connected to MICGS through a 10-k Ω resistor 10 dBrnC0 MICIN to DOUT at 0 dBm0 to – 24 dBm0 36 MICIN to DOUT at –25 dBm0 to – 30 dBm0 34 Transmit signal-to-distortion ratio with sine-wave input MICIN to DOUT at – 31 dBm0 to – 38 dBm0 30 dB MICIN to DOUT at – 39 dBm0 to – 40 dBm0 24 MICIN to DOUT at – 41 dBm0 to – 45 dBm0 20 Intermodulation distortion, 2-tone CCITT method, CCITT G.712 (7.1), R2 49 dB composite power level –13 dBm0 CCITT G.712 (7.2), R3 51 dB NOTE 8: Transmit noise, linear mode: 200 µVrms is equivalent to –74 dB (referenced to device 0-dB level). |
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