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LM4781TABD Datasheet(PDF) 4 Page - Texas Instruments |
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LM4781TABD Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 31 page  LM4781, LM4781TABD SNAS208A – AUGUST 2003 – REVISED APRIL 2013 www.ti.com Electrical Characteristics (1) (2) The following specifications apply for V + = +28V, V- = −28V, I MUTE = -1mA/channel and RL = 8Ω unless otherwise specified. Limits apply for TA = 25°C. LM4781 Units Symbol Parameter Conditions (Limits) Typical(3) Limit(4)(5) 20 V (min) |V+| + |V-| Power Supply Voltage(6) GND − V- ≥ 9V 18 70 V (max) AM Mute Attenuation IMUTE = 0mA 110 80 dB (min) THD+N = 0.5% (max) f = 1kHz PO Output Power (RMS) |V+| = |V-| = 20V, RL = 4Ω 25 20 W (min) |V+| = |V-| = 24V, RL = 6Ω 30 25 W (min) |V+| = |V-| = 28V, RL = 8Ω 35 30 W (min) PO = 20W, f = 20Hz - 20kHz AV = 26dB Total Harmonic Distortion + THD+N |V+| = |V-| = 20V, RL = 4Ω 0.5 % Noise |V+| = |V-| = 24V, RL = 6Ω 0.3 % |V+| = |V-| = 28V, RL = 8Ω 0.2 % PO = 10W, f = 1kHz 70 dB Xtalk Channel Separation(7) PO = 10W, f = 10kHz 66 dB SR Slew Rate VIN = 1.2VRMS, f = 10kHz square 9 5 V/ μs (min) Wave.RL = 2kΩ IDD Total Quiescent Power VCM = 0V 75 150 mA (max) Supply Current VO = 0V, IO = 0A VOS Input Offset Voltage VCM = 0V, IO = 0mA 1 10 mV (max) IB Input Bias Current VCM = 0V, IO = 0mA 0.2 1 μA (max) IO Output Current Limit |V+| = |V-| = 20V, tON = 10ms 4 3 A (min) |V+ - VO|, V + = 20V, I O = +100mA 1.5 4 V (max) VOD Output Dropout Voltage(8) |VO - V -|, V-= -20V, I O = -100mA 2.5 4 V (max) V+ = 30V to 10V, V-= -30V 125 85 dB (min) VCM = 0V, IO = 0mA PSRR Power Supply Rejection Ratio(9) V+ = 30V, V-= -30V to -10V 110 85 dB (min) VCM = 0V, IO = 0mA CMRR Common Mode Rejection Ratio(9) V+ = 30V to 10V, V-= -10V to -30V 110 75 dB (min) VCM = 20V to -20V, IO = 0mA AVOL Open Loop Voltage Gain |V+| = |V-| = 28V, RL = 2kΩ 115 80 dB (min) ΔVO = 20V GBWP Gain Bandwidth Product |V+| = |V-| = 28V, fIN = 100kHz 8 2 MHz (min) VIN = 50mVRMS eIN Input Noise IHF-A-Weighting Filter, 3.0 8 μV (max) RIN = 600Ω (Input Referred) (1) All voltages are measured with respect to the ground pins, 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) Typical specifications are measured at 25°C and represent the parametric norm. (4) Tested limits are specified to TI's AOQL (Average Outgoing Quality Level). (5) Datasheet min/max specification limits are specified by design, test, or statistical analysis. (6) V- must have at least - 9V at its pin with reference to GND in order for the under-voltage protection circuitry to be disabled. In addition, the voltage differential between V+ and V-must be greater than 14V. (7) Cross talk performance was measured using the demo board shown in the datasheet. PCB layout will affect cross talk. It is recommended that the input and output traces be separated by as much distance as possible. Return ground traces from outputs should also be independent back to single ground point and use as wide of traces as possible. (8) The output dropout voltage is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in the Typical Performance Characteristics section. (9) DC electrical test. 4 Submit Documentation Feedback Copyright © 2003–2013, Texas Instruments Incorporated Product Folder Links: LM4781 LM4781TABD |
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