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LM49450 데이터시트(PDF) 8 Page - Texas Instruments |
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LM49450 데이터시트(HTML) 8 Page - Texas Instruments |
8 / 42 page LM49450 SNAS440D – FEBRUARY 2008 – REVISED MAY 2013 www.ti.com Electrical Characteristics VDD = LSVDD = 5.0V (1)(2) (continued) The following specifications apply for Headphone: AV = 0dB, RL(LS) = 8Ω, RL(HP) = 32Ω, f = 1kHz, unless otherwise specified. Limits apply for TA = 25°C. LM49450 Units Symbol Parameter Conditions (Limits) Typical(3) Limit(4) PO = 500mW, f = 1kHz, RL = 8Ω DAC Active, 74 dB Line Inputs Active 79 dB Xtalk Crosstalk PO = 500mW, f = 10kHz, RL = 8Ω DAC Active, 60 dB Line Inputs Active 60 dB PO = 500mW, f = 1kHz, A-weighted DAC Active, Internal Reference 88 dB SNR Signal to Noise Ratio DAC Active, External Reference 89 dB Line Inputs Active 98 dB Maximum Gain Setting, Line Inputs 22.5 dB (min) 24.2 Active 24.2 dB (max) AV Digitally Controlled Gain Level Minimum Gain Setting, Line Inputs –49 dB (min) –48 Active –46 dB (max) Mute Mute Attenuation Line Inputs Active –92 dB Channel-to-Channel Gain ΔACH-CH 0.3 dB Matching Input Referred, A-weighted DAC Active, Internal Reference 60 μV εOS Output Noise DAC Active, External Reference 85 μV Line Inputs Active 40 μV tON Turn-On Time 27 ms tOFF Turn-Off Time 1 ms Timing Characteristics (1) (2) The following specifications apply for Headphone: AV = 0dB, RL(LS) = 8Ω, RL(HP) = 32Ω, f = 1kHz, unless otherwise specified. Limits apply for TA = 25°C. LM49450 Units Symbol Parameter Conditions (Limits) Typical(3) Limit(4) AUDIO INTERFACE TIMING tMCLKL MCLK Pulse Width Low 16 ns (min) tMCLKH MCLK Pulse Width High 16 ns (min) tMCLKY MCLK Period 32 ns (min) tBCLKR BCLK Rise Time 3 ns (max) tBCLKCF BCLK Fall Time 3 ns (max) tBCLKDS BCLK Duty Cycle 50 % LRC Propagation Delay from ns (max) tDL 10 BCLK falling edge DATA Setup Time to BCLK Rising 10 ns (min) tDST Edge (1) The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not ensured. (2) RL is a resistive load in series with two inductors to simulate an actual speaker load. For RL = 8Ω, the load is 15µH + 8Ω +15µH. For RL = 4 Ω, the load is 15µH + 4Ω + 15µH. (3) Typical values represent most likely parametric norms at TA = +25ºC, and at the Recommended Operation Conditions at the time of product characterization and are not ensured. (4) Datasheet min/max specification limits are specified by test or statistical analysis. 8 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: LM49450 |
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