Features Easily drives 600Ω loads Optimized for superior audio signal fidelity Output short circuit protection PSRR and CMRR exceed 120dB (typ) Description The LME49722 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 LME49722 audio operational amplifiers deliver superior audio signal amplification for outstanding audio performance. The LME49722 combines extremely low voltage noise density (1.9nV/ √Hz) rate with vanishingly low THD+N (0.00002%) to easily satisfy the most demanding audio applications. To ensure that the most challenging loads are driven without compromise, the LME49722 has a high slew rate of ±22V/µs and an output current capability of ±28mA. Further, dynamic range is maximized by an output stage that drives 2kΩ loads to within 1V of either power supply voltage. The LME49722 has a wide supply range of ±2.5V to ±18V. Over this supply range the LME49722 maintains excellent common-mode and power supply rejection, and low input bias current. This Audio Operational Amplifier achieves outstanding AC performance while driving complex loads with values as high as 100pF with gain value greater than 2. Directly interchangeable with LME49720, LM4562 and LME49860 for similar operating voltages. Key Specification ■  Wide Operating Voltage Range ±2.5V to ±18V ■  Equivalent Noise   (Frequency = 1kHz) 1.9nV/ √ ^Hz (typ) ■  Equivalent Noise   (Frequency = 10Hz) 2.8nV/ √ ^Hz (typ) ■  PSRR 120dB (typ) ■  Slew Rate ±22V/μs (typ) ■  THD+N  (AV = 1, VOUT = 3VRMS, fIN = 1kHz)    RL = 2kΩ 0.00002% (typ)  RL = 600Ω 0.00002% (typ) ■  Open Loop Gain (RL = 600Ω) 135dB (typ) ■  Input Bias Current 50nA (typ) ■  Voltage Offset ±0.02mV (typ) Applications Ultra high quality audio amplification High fidelity preamplifiers, phono preamps, and multimedia High performance professional audio High fidelity equalization and crossover networks with active filters High performance line drivers and receivers Low noise industrial applications including test, measurement, and ultrasound

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Parameters Values THD 0.00002 % PSRR 120 dB Supply Min 2.5 Volt Single/Dual/Quad Dual Supply Current per Amplifier 12.1 mA Supply Max 38 Volt Voltage Noise 1.9 nV/root(Hz) Supply Range +/-2.5V to +/-18V Max Input Bias Current 53 nA Output Current 28 mA Offset Voltage, typ 0.02 mV Gain Bandwidth 55 MHz Slew Rate 22 Volts/usec CMRR 130 dB Temperature Min -40 deg C Temperature Max 85 deg C Channels 2 Channels Input OutputType Not Rail to Rail Offset Voltage max, 25C 0.7 mV

Datasheets

Title		Size	Date	Other Language
	LME49722 Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier	408 Kbytes	27-Mar-08

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LME49722MA/NOPB RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 145 DIGI-KEY Worldwide 265 FARNELL Europe and Asia 189 NEWARK Americas 260	$1.41 each at 1K+ pcs	rail of 95
LME49722MAX/NOPB RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.41 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 LME49722.

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 LME49722 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LME49722MABD	36V High Performance, High Fidelity Dual Audio Operational Amplifier (8-pin, SOIC Package)	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	CALL	N/A
Description: The LME49722 is a Dual High Fidelity Audio Operational Amplifier with very low input referred voltage noise density of 1.9nV/rtHz. This Audio Amplifier offers extremely low THD+N, similar to previous LME op amps, and sets a new standard for high end audio users. National's newest Amplifier uses state of the art circuitry and process to achieve a new class of audio performance and technology. The AC and DC parameters in this amplifier series offers users a solution well suited for the most demanding signal path applications. The LME49722 is designed for high slew rate, very low noise and high output for systems needing +/-2.5 to +/-18V functionality. The pin out is the National standard to quickly upgrade existing boards. This series is for applications such as high quality audio amplification, multi-media, imaging, line drivers/receivers and active filters. The output current is for 600Ohm or 2000Ohm loads with ultra-low THD+N of 0.00003% over a wide voltage range. The LME49722MABD is the evaluation board designed to establish performance and evaluation to design the best end user system. The evaluation boards include all components for a ready-to-use, stand-alone bench work. Features: Dual Audio Operational Amplifier Ultra Low THD+N of 0.00003% 36V operation Very Low Voltage Noise of 1.9nV/rtHz Gain Bandwidth Product >55MHz 20uV/s Slew rate PSRR >120dB CMRR >120dB Vos is 0.1mV Available in SOIC package Applications: High Fidelity Audio Equipment High Fidelity drivers/receivers Contents: Fully Assembled LME49722 Evaluation Board Instructions for where to locate and download the 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
LME49722MA/NOPB	69.761	SOIC NARROW	8	1	260	Detail	Download	N/A	NSZXTT L49722 MA
LME49722MAX/NOPB	69.761	SOIC NARROW	8	1	260	Detail	Download	N/A	NSZXTT L49722 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 LME49722.

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 LME49722 is located at RoHS Status.

CAD Symbols and Models Download LME49722 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LME49722MA	VIP III	0	16160	0	0	1302500	3	369587931
LME49722MAX	VIP III	0	16160	0	0	1302500	3	369587931

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 LME49722.

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 LME49722 is located at RoHS Status.