Features • Rail-to-rail Input and Output • Easily drives 10kΩ loads to within 10mV of each power supply voltage • Optimized for superior audio signal fidelity • Output short circuit protection Description The LME49721 is a low distortion, low noise Rail-to-Rail Input/Output operational amplifier optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49721 Rail-to-Rail Input/Output operational amplifier delivers superior signal amplification for outstanding performance. The LME49721 combines a very high slew rate with low THD+N to easily satisfy demanding applications. To ensure that the most challenging loads are driven without compromise, the LME49721 has a high slew rate of ±8.5V/μs and an output current capability of ±9.7mA. Further, dynamic range is maximized by an output stage that drives 10kΩ loads to within 10mV of either power supply voltage. The LME49721 has a wide supply range of 2.2V to 5.5V. Over this supply range the LME49721’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49721 is unity gain stable. Key Specification ■  Power Supply Voltage Range 2.2V to 5.5V ■  Quiescent Current 2.15mA (typ) ■   THD+N (AV = 2, VOUT = 4Vp-p, fIN = 1kHz)    RL = 2kΩ 0.00008% (typ)  RL = 600Ω 0.0001% (typ) ■  Input Noise Density 4nV/ √ ^Hz (typ), @ 1kHz ■  Slew Rate ±8.5V/μs (typ) ■  Gain Bandwidth Product 20MHz (typ) ■  Open Loop Gain (RL = 600Ω) 118dB (typ) ■  Input Bias Current 40fA (typ) ■  Input Offset Voltage 0.3mV (typ) ■  PSRR 103dB (typ) Applications • Ultra high quality portable 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 • DAC I–V converter • ADC front-end signal conditioning

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Datasheets

Title		Size	Date	Other Language
	LME49721 High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier	727 Kbytes	2-Oct-07

Featured Application Notes

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

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LME49721MA/NOPB LME49721MA RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 6130 DIGIKEY Worldwide 586 FUTURE Worldwide 180 RS COMPONENTS Worldwide 42	$1.50 each at 1K+ pcs	rail of 95
LME49721MAX/NOPB LME49721MAX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.50 each at 1K+ pcs	rail of 95

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LME49721MA/NOPB LME49721MA		SOIC NARROW	8	1 1	260 260	Detail	Download	N/A	NSZXTT L49721 MA
LME49721MAX/NOPB LME49721MAX		SOIC NARROW	8	1 1	260 260	Detail	Download	N/A	NSZXTT L49721 MA

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models Download LME49721 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LME49721MA	CMOS7	0	18406	0	0	1089000	4	309006723
LME49721MAX	CMOS7	0	18406	0	0	1089000	4	309006723

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.