LME49721 - High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Knowledge Base

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

Key Specification

■ Power Supply Voltage Range	2.2V to 5.5V
■ Quiescent Current	2.15mA (typ)
■ THD+N (A_V = 2, V_OUT = 4V_p-p, f_IN = 1kHz)
R_L = 2kΩ	0.00008% (typ)
R_L = 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 (R_L = 600Ω)	118dB (typ)
■ Input Bias Current	40fA (typ)
■ Input Offset Voltage	0.3mV (typ)
■ PSRR	103dB (typ)

General 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. More...

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

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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

Typical Performance

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LME49721 High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier	727 Kbytes	2-Oct-07	Download

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LME49721MABD

LME49721MABD Evaluation Board

Full production

N/A

$150.00

N/A

LME49721MA

SOIC NARROW

NOPB
STD

1
1

260
260

RoHS

N/A

Full production

N/A

1K+

$1.50

rail
of
95

NSZXTT
L49721
MA

6 weeks

500

LME49721MAX

SOIC NARROW

NOPB
STD

1
1

260
260

RoHS

N/A

Full production

N/A

1K+

$1.50

rail
of
95

NSZXTT
L49721
MA

8 weeks

N/A

General 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.

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.

Application Notes

Title	Size in Kbytes	Date
AN-1767: Application Note 1767 LME49721 Evaluation Board	649 Kbytes	24-Feb-08	Download
AN-1767 (Chinese): Application Note 1767 LME49721 Evaluation Board	787 Kbytes

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]