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LM49321 Datasheet(PDF) 7 Page - Texas Instruments |
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LM49321 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 45 page LM49321, LM49321RLEVAL www.ti.com SNAS457C – SEPTEMBER 2008 – REVISED MAY 2013 Audio Amplifier Electrical Characteristics AVDD = 5.0V, DVDD = 3.3V (1) (2) The following specifications apply for the circuit shown in Figure 41 with all programmable gain set at 0dB, unless otherwise specified. Limits apply for TA = 25°C. LM49321 Units Parameter Test Conditions (Limits) Typ(3) Limits(4) VIN = 0, No Load 17.5 mA (max) All Amps On + DAC, OCL(5) Headphone Mode Only, OCL, DAC Off 5.8 mA (max) Headphone Mode Only, OCL, DAC Off STEREO_OUTPUT_ONLY = 1, 5.5 mA STEREO_INPUT_ONLY = 1 IDD Supply Current Headphone Mode Only, OCL, DAC On, OSR = 64, DAC_INPUT_ONLY = 1 9.5 mA STEREO_OUTPUT_ONLY = 1 Mono Loudspeaker Mode Only(5) 11.6 mA Mono Earpiece Mode Only(5) 5 mA DAC Off, All Amps On (OCL)(5) 12.9 mA ISD Shutdown Current See(6) 1.6 μA Speaker; THD = 1%; f = 1kHz, 8 Ω BTL 1.25 mW PO Output Power Headphone; THD = 1%; f = 1kHz, 32 Ω SE 80 mW Earpiece; THD = 1%; f = 1kHz, 32 Ω BTL 175 mW VFS DAC Full Scale DAC Output 2.4 VRMS Speaker; PO = 500mW; f = 1kHz, 8Ω BTL 0.03 % THD+N Total Harmonic Distortion + Noise Headphone; PO = 30mW; f = 1kHz, 32Ω SE 0.01 % Earpiece; PO = 40mW; f = 1kHz, 32Ω BTL 0.04 % Speaker 10 mV VOS Offset Voltage Earpiece 8 mV HP (OCL) 8 mV ∈O Output Noise A-weighted; 0dB gain; Table 1 PSRR Power Supply Rejection Ratio f = 217Hz; Vripple = 200mVP-P, CB = 2.2μF Table 3 XTALK Crosstalk Headphone; PO= 15mW, f = 1kHz; OCL –56 dB CB = 2.2μF, CD_6 = 0 45 ms TWU Wake-Up Time CB = 2.2μF, CD_6 = 1 130 ms (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. All voltages are measured with respect to the ground pin, unless otherwise specified. (2) The Electrical Characteristics tables list specified 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. (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 ensured by test or statistical analysis. (5) Enabling mono bit (MONO_ONLY in Output Control Register 01h) will save 400 μA (typ) form specified current. (6) Shutdown current is measured in a normal room environment. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM49321 LM49321RLEVAL |
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