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LM4937 bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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LM4937 bảng dữ liệu(HTML) 5 Page - Texas Instruments |
5 / 41 page LM4937 www.ti.com SNAS369J – OCTOBER 2006 – REVISED MAY 2013 AUDIO AMPLIFIER ELECTRICAL CHARACTERISTICS AVDD = 3.0V, DVDD = 3.0V (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) Speaker; THD = 1%; f = 1kHz, 8 Ω BTL 420 370 mW (min) PO Output Power Headphone; THD = 1%; f = 1kHz, 32 Ω SE 27 24 mW (min) Earpiece; THD = 1%; f = 1kHz, 32 Ω BTL 45 40 mW (min) VFS DAC Full Scale DAC Output 2.4 Vpp Speaker; PO = 200mW; 0.04 % f = 1kHz, 8 Ω BTL Headphone; PO = 10mW; THD+N Total Harmonic Distortion 0.01 % f = 1kHz, 32 Ω SE Earpiece; PO = 20mW; 0.04 % f = 1kHz, 32 Ω BTL Speaker 10 55 mV (max) VOS Offset Voltage Earpiece 8 50 mV (max) Headphone (OCL) 8 40 mV (max) ∈O Output Noise A = weighted; 0dB gain; Table 1 See Table 1 PSRR Power Supply Rejection Ratio f = 217Hz; Vripple = 200mVP-P Table 2 CB = 2.2μF; See Table 2 Headphone; PO= 10mW Xtalk Crosstalk –60 dB f = 1kHz; OCL TWU Wake-Up Time CB = 2.2μF, CD6 = 0 35 ms (max) CB = 2.2μF, CD6 = 1 85 ms (max) CMRR Common-Mode Rejection Ratio f = 217Hz, VRMS = 200mVpp 56 dB AUDIO AMPLIFIER ELECTRICAL CHARACTERISTICS AVDD = 5.0V, DVDD = 3.3V (1) (2) 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) VIN = 0, No Load 17.5 mA (max) All Amps On + DAC, OCL(6) Headphone Mode Only (OCL) 5.8 mA (max) IDD Supply Current Mono Loudspeaker Mode Only(6) 11.6 mA (max) Mono Earpiece Mode Only(6) 5 mA (max) DAC Off, All Amps On (OCL)(6) 12.9 mA (max) ISD Shutdown Current 1.6 μA (max) Speaker; THD = 1%; 1.25 mW (min) f = 1kHz, 8 Ω BTL Headphone; THD = 1%; PO Output Power 80 mW (min) f = 1kHz, 32 Ω SE Earpiece; THD = 1%; 175 mW (min) f = 1kHz, 32 Ω BTL (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) Enabling mono bit (D_6 in Output Control Register 01h) will save 400 μA (typ) from specified current. Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM4937 |
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