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QFN-24 Datasheet(PDF) 6 Page - Texas Instruments |
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QFN-24 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 34 page TAS2505 SLAS778A – FEBRUARY 2013 – REVISED FEBRUARY 2013 www.ti.com Electrical Characteristics (continued) At 25°C, AVDD = 1.8V, IOVDD = 1.8 V, SPKVDD = 3.6 V, DVDD = 1.8 V, fS (audio) = 48 kHz, CODEC_CLKIN = 256 × fS, PLL = Off PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Audio DAC – Stereo Single-Ended Headphone Output Load = 16 Ω (single-ended), Input & Output CM = 0.75V, DOSR = 128, Device Setup MCLK = 256* Device Setup fs, Channel Gain = 0dB word length = 16 bits; Processing Block = PRB_P1 Power Tune = PTM_P3 Full-scale output voltage (0 dB) 0.375 Vrms ICN Idle channel noise Measured as idle-channel noise, A-weighted(1) (2) 18.1 μVms THD+N Total harmonic distortion + noise 0-dBFS input, 1-kHz input signal -78.2 dB Mute attenuation Mute 105.5 dB PSRR Power-supply rejection ratio(3) Ripple on AVDD (1.8 V) = 200 mVPP at 1 kHz 48.4 dB DR Dynamic range, A-weighted(1) (2) –60dB 1kHz input full-scale signal 86.8 Gain error 0dB, 1kHz input full scale signal ±0.3 dB RL = 32 Ω, THD+N ≤ –40 dB 8 PO Maximum output power mW RL = 16 Ω, THD+N ≤ –40 dB 16 DAC DIGITAL INTERPOLATION FILTER CHARACTERISTICS See for DAC interpolation filter characteristics. DAC OUTPUT TO CLASS-D SPEAKER OUTPUT; LOAD = 4 Ω (DIFFERENTIAL) BTL measurement, class-D gain = 6 dB, Measured ICN Idle channel noise 37 μVms as idle-channel noise, A-weighted(1) (2) BTL measurement, class-D gain = 6 dB, -3dBFS Output voltage 1.4 Vrms input BTL measurement, DAC input = –6 dBFS, class-D THD+N Total harmonic distortion + noise –73.9 dB gain = 6 dB BTL measurement, ripple on SPKVDD = 200 mVPP PSRR Power-supply rejection ratio 55 dB at 1 kHz Mute attenuation Mute 103 dB SPKVDD = 3.6 V, BTL measurement, CM = 0.9V, 1.1 class-D gain = 18 dB, THD = 10% SPKVDD = 4.2 V, BTL measurement, CM = 0.9 V, 1.4 class-D gain = 18 dB, THD = 10% SPKVDD = 3.6 V, BTL measurement, CM = 0.9V, PO Maximum output power 0.8 W class-D gain = 18 dB, THD = 1% SPKVDD = 4.2 V, BTL measurement, CM = 0.9V, 1.1 class-D gain = 18 dB, THD = 1% SPKVDD = 5.5 V, BTL measurement, CM = 0.9V, 2 class-D gain = 18 dB (1) Ratio of output level with 1-kHz full-scale sine-wave input, to the output level with the inputs short-circuited, measured A-weighted over a 20-Hz to 20-kHz bandwidth using an audio analyzer. (2) All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter removes out-of-band noise, which, although not audible, may affect dynamic specification values. (3) DAC to headphone-out PSRR measurement is calculated as PSRR = 20 X log( ∆VHP / ∆VAVDD). 6 ELECTRICAL SPECIFICATIONS Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TAS2505 |
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