Features • Easily drives 600Ω loads • Optimized for superior audio signal fidelity • Output short circuit protection • PSRR and CMRR exceed 120dB (typ) • SOIC, DIP, TO-99 metal can packages Description The LME49720 is part of the ultra-low distortion, low noise, high slew rate operational amplifier series optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49720 audio operational amplifiers deliver superior audio signal amplification for outstanding audio performance. The LME49720 combines extremely low voltage noise density (2.7nV/ √ ^Hz) with vanishingly low THD+N (0.00003%) to easily satisfy the most demanding audio applications. To ensure that the most challenging loads are driven without compromise, the LME49720 has a high slew rate of ±20V/μs and an output current capability of ±26mA. Further, dynamic range is maximized by an output stage that drives 2kΩ loads to within 1V of either power supply voltage and to within 1.4V when driving 600Ω loads. The LME49720's outstanding CMRR (120dB), PSRR (120dB), and VOS (0.1mV) give the amplifier excellent operational amplifier DC performance. The LME49720 has a wide supply range of ±2.5V to ±17V. Over this supply range the LME49720’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49720 is unity gain stable. This Audio Operational Amplifier achieves outstanding AC performance while driving complex loads with values as high as 100pF. The LME49720 is available in 8–lead narrow body SOIC, 8–lead Plastic DIP, and 8–lead Metal Can TO-99. Demonstration boards are available for each package. Key Specification ■  Power Supply Voltage Range ±2.5V to ±17V ■   THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz)    RL = 2kΩ 0.00003% (typ)  RL = 600Ω 0.00003% (typ) ■  Input Noise Density 2.7nV/ √ ^Hz (typ) ■  Slew Rate ±20V/μs (typ) ■  Gain Bandwidth Product 55MHz (typ) ■  Open Loop Gain (RL = 600Ω) 140dB (typ) ■  Input Bias Current 10nA (typ) ■  Input Offset Voltage 0.1mV (typ) ■  DC Gain Linearity Error 0.000009% Applications • Ultra high quality audio amplification • High fidelity preamplifiers • High fidelity multimedia • State of the art phono pre amps • High performance professional audio • High fidelity equalization and crossover networks • High performance line drivers • High performance line receivers • High fidelity active filters

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Datasheet

Title		Size	Date	Other Language
	LME49720 Dual High Performance, High Fidelity Audio Operational Amplifier	1064 Kbytes	22-Oct-07

Featured Application Notes

Title		Size	Date	Other Language
	AN-1651: Application Note 1651 Keeping Up with the Expanding Demands of High-Performance Audio	206 Kbytes	10-Jul-07	中文
	AN-1671: Application Note 1671 Gain and Linearity Testing for Precision Operational Amplifiers	417 Kbytes	21-May-08	日本語

More Application Notes

Title		Size	Date	Other Language
	AN-1767: Application Note 1767 LME49721 Evaluation Board	649 Kbytes	24-Feb-08	中文

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LME49720HA	VIP III	0	15575	0	0	1212500	3	344050185
LME49720MA	VIP III	0	15575	0	0	1212500	3	344050185
LME49720MAX	VIP III	0	15575	0	0	1212500	3	344050185
LME49720NA	VIP III	0	15575	0	0	1212500	3	344050185

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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