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, f IN = 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

Typical Application click for larger image
Typical Performance click for larger image

Parameters Values THD .0002 % PSRR 103 dB Supply Min 2.2 Volt Single/Dual/Quad Dual Special Features Rail to rail THD Conditions Av=+1, Vout=2Vpp, Rl=2kohm, Rl=600ohm User Supply 5 Volt Supply Current per Amplifier 2.15 mA Supply Max 5.5 Volt Shut down No Voltage Noise 4 nV/root(Hz) Supply Range +2.2 - +5.5 V Max Input Bias Current 0.00004 nA Output Current 9.7 mA Offset Voltage, typ 0.3 mV Gain Bandwidth 20 MHz Slew Rate 8.5 Volts/usec CMRR 93 dB CMRR Conditions Vss-100mV < Vout < Vdd+200mV Mono/Stereo Stereo Temperature Min -40 deg C Temperature Max 85 deg C Channels 2 Channels Input OutputType R-R In and Out Offset Voltage max, 25C 1.5 mV Automotive Yes

Datasheets

Title		Size	Date	Other Language
	LME49721 High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier	751 Kbytes	21-Apr-10

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	Pack Size
LME49721MA/NOPB RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 391 FARNELL Europe and Asia 221 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 DIGI-KEY Worldwide 0	$1.50 each at 1K+ pcs	reel of 2500

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

Moisture Sensitivity Level Data for LME49721.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LME49721 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LME49721MABD	LME49721MABD Evaluation Board	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$150.00 each	1
The LME49721MA 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 circuitry, the LME49721 Rail-to-Rail Input/Output operational amplifier delivers superior signal amplification for outstanding signal path performance. This LME49721MABD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LME49721. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load. Features: True Rail to Rail Input and Output.      Easily Drives 10K ohm loads to within 10mv of each supply rail. Optimized for Superior Audio Signal Fidelity Output Short Circuit Protection 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 Evaluation Board Contents: Fully Assembled LME49721MABD Evaluation Board Instructions for where to locate and download the datasheet Please note: application information and board layout can be found in datasheet

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LME49721MA/NOPB	69.761 69.761	SOIC NARROW	8	1	260	Detail	Download	N/A	NSZXTT L49721 MA
LME49721MAX/NOPB LME49721MAX	69.761 69.761	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/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LME49721.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LME49721 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	21301	0	0	1584000	3	449464325
LME49721MAX	CMOS7	0	21301	0	0	1584000	3	449464325

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/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LME49721.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LME49721 is located at RoHS Status.