Datasheet LM4780, LM4780TABD (Texas Instruments) - 5

link to page 10
LM4780 , LM4780TABD www.ti.com
SNAS193B – JULY 2003 – REVISED APRIL 2013
Electrical Characteristics(1)(2)
The following specifications apply for V+ = +35V, V- = −35V, IMUTE = -1mA and RL = 8Ω unless otherwise specified. Limits apply for TA = 25°C.
LM4780 Units Symbol Parameter Conditions (Limits) Typical(3) Limit(4)(5)
20 V (min) |V+| + |V-| Power Supply Voltage(6) GND − V- ≥ 9V 18 84 V (max) AM Mute Attenuation IMUTE = 0mA 110 80 dB (min) THD+N = 0.5% (max) f = 1kHz; f = 20kHz PO Output Power (RMS) |V+| = |V-| = 25V, RL = 4Ω 55 50 W (min) |V+| = |V-| = 30V, RL = 6Ω 55 50 W (min) |V+| = |V-| = 35V, RL = 8Ω 60 50 W (min) PO = 30W, f = 20Hz - 20kHz AV = 26dB Total Harmonic Distortion + THD+N |V+| = |V-| = 25V, RL = 4Ω 0.07 % Noise |V+| = |V-| = 30V, RL = 6Ω 0.05 % |V+| = |V-| = 35V, RL = 8Ω 0.03 % PO = 10W, f = 1kHz 70 dB Xtalk Channel Separation(7) PO = 10W, f = 10kHz 72 dB SR Slew Rate VIN = 2.0VP-P, tRISE = 2ns 19 8 V/μs (min) Total Quiescent Power VCM = 0V, 110 170 mA (max) IDD 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 11.5 7 A (min) |V+ - VO|, V+ = 28V, IO = +100mA 1.6 2.0 V (max) VOD Output Dropout Voltage(8) |V-- VO|, V-= -28V, IO = -100mA 2.5 3.0 V (max) V+ = 40V to 20V, V-= -40V, 120 85 dB (min) VCM = 0V, IO = 0mA PSRR Power Supply Rejection Ratio(9) V+ = 40V, V-= -40V to -20V, 105 85 dB (min) VCM = 0V, IO = 0mA V+ = 60V to 20V, V-= -20V to -60V, CMRR Common Mode Rejection Ratio(9) 110 85 dB (min) VCM = 20V to -20V, IO = 0mA AVOL Open Loop Voltage Gain RL = 2kΩ, ΔVO = 40V 115 90 dB (min) GBWP Gain Bandwidth Product fIN = 100kHz, VIN = 50mVRMS 8 2 MHz (min) IHF-A-Weighting Filter, eIN Input Noise 2.0 10 μV (max) RIN = 600Ω (Input Referred) PO = 1WRMS; A-Weighted Filter 97 dB fIN = 1kHz, RS = 25Ω SNR Signal-to-Noise Ratio PO = 50WRMS; A-Weighted Filter 114 dB fIN = 1kHz, RS = 25Ω (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 specified 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 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 input and output traces be separated by as much distance as possible. Return ground traces from outputs should be independent back to a single ground point and use as wide of traces as possible. (8) The output dropout voltage is defined as 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. Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM4780 LM4780TABD Document Outline Features Applications Key Specifications Description Typical Application Connection Diagram Absolute Maximum Ratings Operating Ratings Electrical Characteristics Bridged Amplifier Application Circuit Parallel Amplifier Application Circuit Single Supply Application Circuit Auxiliary Amplifier Application Circuit External Components Description Optional External Component Interaction Typical Performance Characteristics Application Information MUTE MODE UNDER-VOLTAGE PROTECTION OVER-VOLTAGE PROTECTION SPiKe PROTECTION THERMAL PROTECTION DETERMlNlNG MAXIMUM POWER DISSIPATION DETERMINING THE CORRECT HEAT SINK SUPPLY BYPASSING BRIDGED AMPLIFIER APPLICATION PARALLEL AMPLIFIER APPLICATION SINGLE-SUPPLY AMPLIFIER APPLICATION CLICKS AND POPS PROPER SELECTION OF EXTERNAL COMPONENTS HIGH PERFORMANCE CONSIDERATIONS SIGNAL-TO-NOISE RATIO LEAD INDUCTANCE PHYSICAL IC MOUNTING CONSIDERATIONS LAYOUT, GROUND LOOPS AND STABILITY REACTIVE LOADING INVERTING AMPLIFIER APPLICATION LM4780 REFERENCE BOARD ARTWORK Bill Of Materials For Reference Pcb Revision History Page 1