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LM4937 데이터시트(PDF) 6 Page - Texas Instruments |
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LM4937 데이터시트(HTML) 6 Page - Texas Instruments |
6 / 41 page LM4937 SNAS369J – OCTOBER 2006 – REVISED MAY 2013 www.ti.com AUDIO AMPLIFIER ELECTRICAL CHARACTERISTICS AVDD = 5.0V, DVDD = 3.3V (1)(2) (continued) The following specifications apply for the circuit shown in Figure 1 with all programmable gain set at 0dB, unless otherwise specified. Limits apply for TA = 25°C. Symbol Parameter Conditions LM4937 Units (Limits) Typical(3) Limits(4)(5) VFS DAC Full Scale DAC Output 2.4 Vpp Speaker; PO = 500mW; 0.03 % f = 1kHz, 8 Ω BTL Headphone; PO = 30mW; THD+N Total Harmonic Distortion 0.01 % f = 1kHz, 32 Ω SE Earpiece; PO = 40mW; 0.04 % f = 1kHz, 32 Ω BTL; CD4 = 0 Speaker 10 mV VOS Offset Voltage Earpiece 8 mV HP (OCL) 8 mV ∈O Output Noise A = weighted; 0dB gain; Table 1 See Table 1 PSRR Power Supply Rejection Ratio f = 217Hz; Vripple = 200mVP-P Table 3 CB = 2.2μF; See Table 3 Headphone; PO= 15mW Xtalk Crosstalk –56 dB f = 1kHz; OCL CB = 2.2μF, CD6 = 0 45 ms TWU Wake-Up Time CB = 2.2μF, CD6 = 1 130 ms VOLUME CONTROL ELECTRICAL CHARACTERISTICS (1) (2) The following specifications apply for 3.0V ≤ AVDD ≤ 5.0V and 2.7V ≤ DVDD ≤ 4.0V, unless otherwise specified. Limits apply for TA = 25°C. Symbol Parameter Conditions LM4937 Units (Limits) Typical(3) Limits(4)(5) –7 dB (min) minimum gain setting –6 –5 dB (max) Stereo Analog Inputs PreAmp Gain Setting Range 15.5 dB (max) maximum gain setting 15 14.5 dB (min) PGR –13 dB (min) minimum gain setting –12 –11 dB (max) Differential Mono Analog Input PreAmp Gain Setting Range 9.5 dB (max) maximum gain setting 9 8.5 dB (min) –59 dB (min) minimum gain setting –56 Output Volume Control for –53 dB (max) VCR Loudspeaker, Headphone Output, or 4.5 dB (min) Earpiece Output maximum gain setting +5 5.5 dB (max) Stereo Channel to Channel Gain ΔACH-CH 0.3 dB Mismatch Vin = 1Vrms, Gain = 0dB Mute Attenuation with load AMUTE Headphone <-90 dB (min) (1) All voltages are measured with respect to the GND pin unless otherwise specified. (2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance. (3) Typicals are measured at 25°C and represent the parametric norm. (4) Limits are specified to AOQL (Average Outgoing Quality Level). (5) Datasheet min/max specification limits are specified by design, test, or statistical analysis. 6 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LM4937 |
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