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LM49450 Arkusz danych(PDF) 7 Page - Texas Instruments |
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LM49450 Arkusz danych(HTML) 7 Page - Texas Instruments |
7 / 42 page LM49450 www.ti.com SNAS440D – FEBRUARY 2008 – REVISED MAY 2013 Electrical Characteristics VDD = LSVDD = 3.6V, HPVDD = CPVDD = 2.5V (1)(2) (continued) The following specifications apply for Headphone: AV = 0dB, RL(LS) = 8Ω, RL(HP) = 32Ω, f = 1kHz, C1 = C2 = 2.2μF, unless otherwise specified. Limits apply for TA = 25°C. LM49450 Units Symbol Parameter Conditions (Limits) Typical(3) Limit(4) Full-Scale Headphone Amplifier mVRMS VOUT_FS RL = No Load 942 850 Output Voltage (min) tON Turn-On Time 27 ms tOFF Turn-Off Time 1 ms HEADPHONE SENSE INPUT (HPS) VIH Input High Voltage 1 V VIL Input Low Voltage 0.6 V DIGITAL INTERFACE VIH Input High Voltage 2.8 V (min) VIL Input Low Voltage 0.8 V (max) VOH Output High Voltage 2 V (min) VOL Output Low Voltage 1 V (max) Electrical Characteristics VDD = LSVDD = 5.0V (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) SPEAKER AMPLIFIERS (Headphone Amplifiers Disabled, HPS = 0) fS = 48kHz, DAC Active 14 18 mA (max) IDDLS Analog Supply Current Line Inputs Active 10.4 16 mA (max) DAC Voltage 15 50 mV (max) VOS Output Offset Voltage AV = 0dB, Line Inputs Active 12 48 mV (max) RL = 4Ω, f = 1kHz THD+N = 1% 1.9 W THD+N = 10% 2.5 W POUT Output Power RL = 8Ω, f = 1kHz THD+N = 1% 1.25 mW (min) THD+N = 10% 1.54 W PO = 635mW, f = 1kHz, RL = 8Ω THD+N Total Harmonic Distortion DAC Active 0.06 % Line Inputs Active 0.04 % VRIPPLE = 200mVP-P, f = 1kHz DAC Active, Internal Reference 60 dB PSRR Power Supply Rejection Ratio DAC Active, External Reference 60 dB Line Inputs Active 70 dB PO = TBDmW, f = 1kHz η Efficiency 80 % RL = 8Ω (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. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM49450 |
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