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LME49722

www.ti.com

SNAS454A –MARCH 2008–REVISED APRIL 2013

LME49722 Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier

Check for Samples: LME49722

FEATURES

DESCRIPTION

The LME49722 is part of the ultra-low distortion, low

• Easily Drives 600Ω Loads

noise, high slew rate operational amplifier series

• Optimized for Superior Audio Signal Fidelity

optimized and fully specified for high performance,

• Output Short Circuit Protection

high fidelity applications. Combining advanced

leading-edge process technology with state-of-the-art

• PSRR and CMRR Exceed 120dB (typ)

circuit design, the LME49722 audio operational

amplifiers deliver superior audio signal amplification

APPLICATIONS

for outstanding audio performance. The LME49722

• Ultra High Quality Audio Amplification

combines extremely low voltage noise density

(1.9nV/√Hz) rate with vanishingly low THD+N

• High Fidelity Preamplifiers, Phono Preamps,

(0.00002%) to easily satisfy the most demanding

and Multimedia

audio applications. To ensure that the most

• High Performance Professional Audio

challenging loads are driven without compromise, the

• High Fidelity Equalization and Crossover

LME49722 has a high slew rate of ±22V/µs and an

Networks with Active Filters

output current capability of ±28mA. Further, dynamic

range is maximized by an output stage that drives

• High Performance Line Drivers and Receivers

2kΩ loads to within 1V of either power supply voltage.

• Low Noise Industrial Applications Including

The LME49722 has a wide supply range of ±2.5V to

Test, Measurement, and Ultrasound

±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.

Table 1. KEY SPECIFICATIONS

VALUE UNIT

±2.5V to

Wide Operating Voltage Range V

±18

nV/√Hz

Equivalent Noise (Frequency = 1kHz) 1.9

(typ)

nV/√Hz

Equivalent Noise (Frequency = 10Hz) 2.8

(typ)

PSRR 120 dB (typ)

Slew Rate ±22 V/μs (typ)

= 2kΩ 0.00002 % (typ)

THD+N

= 1, V

OUT

= 3V

RMS

, f

= 1kHz)

= 600Ω 0.00002 % (typ)

Open Loop Gain (R

= 600Ω) 135 dB (typ)

Input Bias Current 50 nA (typ)

Voltage Offset ±0.02 mV (typ)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (13 pages)

PAGE 1
LME49722 www.ti.com SNAS454A – MARCH 2008 – REVISED APRIL 2013 LME49722 Low Noise, High Performance, High Fidelity Dual Audio Operational Amplifier Check for Samples: LME49722 FEATURES 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.
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LME49722 SNAS454A – MARCH 2008 – REVISED APRIL 2013 www.ti.com Typical Application C2 R2 VP-P R1 LME49722 + C1 fMAX = > 300 kHz for VP-P = 20V, R2 C2 | R1 C1 Figure 1. Wide Bandwidth Low Noise Low Drift Amplifier Connection Diagram 1 8 OUTPUT A + V 2 7 INVERTING INPUT A OUTPUT B A NON-INVERTING INPUT A 3 - 4 B + + 6 INVERTING INPUT B 5 V NON-INVERTING INPUT B Figure 2.
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LME49722 www.ti.com SNAS454A – MARCH 2008 – REVISED APRIL 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) (3) Supply Voltage (VS = VCC-VEE) 38V −65°C to 150°C Storage Temperature Input Voltage Output Short Circuit (V-) - 0.7V to (V+) + 0.
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LME49722 SNAS454A – MARCH 2008 – REVISED APRIL 2013 www.ti.com (1) (2) Electrical Characteristics for the LME49722 The following specifications apply for VS = ±15V and ±18V, RL = 2kΩ, fIN = 1kHz unless otherwise specified. Limits apply for TA = 25°C, Symbol THD+N Parameter Total Harmonic Distortion + Noise Conditions LME49722 Typical (3) AV = 1, VOUT = 3Vrms RL = 2kΩ RL = 600Ω 0.00002 0.00002 0.00002 (4) Units (Limits) 0.
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LME49722 www.ti.com SNAS454A – MARCH 2008 – REVISED APRIL 2013 Electrical Characteristics for the LME49722 (1)(2) (continued) The following specifications apply for VS = ±15V and ±18V, RL = 2kΩ, fIN = 1kHz unless otherwise specified. Limits apply for TA = 25°C, Symbol VOM IOUT Parameter Output Voltage Swing Output Current Conditions LME49722 Typical (3) VS = ±15V RL = 600Ω RL = 2kΩ RL = 10kΩ +13.7/–14 ±14.0 ±14.1 VS = ±18V RL = 600Ω RL = 2kΩ RL = 10kΩ +16.6/–16.8 ±17.0 ±17.
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LME49722 SNAS454A – MARCH 2008 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics THD+N vs Output Voltage +VCC = –VEE = 15V, fIN = 1kHz, RL = 600Ω 0.01 0.01 0.005 0.005 0.002 0.002 0.001 0.001 THD+N (%) THD+N (%) THD+N vs Output Voltage +VCC = –VEE = 15V, fIN = 1kHz, RL = 2kΩ 0.0005 0.0002 0.0005 0.0002 0.0001 0.0001 0.00005 0.00005 0.00002 0.00002 0.00001 10m 100m 1 10 20 0.00001 10m 100m Figure 4.
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LME49722 www.ti.com SNAS454A – MARCH 2008 – REVISED APRIL 2013 Typical Performance Characteristics (continued) THD+N vs Frequency +VCC = –VEE = 18V, VO = 3VRMS, RL = 2kΩ THD+N vs Frequency +VCC = –VEE = 18V, VO = 3VRMS, RL = 600Ω 0.001 0.0005 0.0005 0.0002 0.0002 THD+N (%) THD+N (%) 0.001 0.0001 0.00005 0.00002 0.0001 0.00005 0.00002 0.00001 20 50 100 200 500 1k 2k 0.00001 20 5k 10k 20k FREQUENCY (Hz) Figure 9. Figure 10.
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LME49722 SNAS454A – MARCH 2008 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) 0.01 0.01 0.005 0.005 0.002 0.002 0.001 0.001 IMD (%) IMD (%) IMD vs Frequency +VCC = –VEE = 2.5V, RL = 2kΩ 0.0005 0.0002 IMD vs Frequency +VCC = –VEE = 2.5V, RL = 600Ω 0.0005 0.0002 0.0001 0.0001 0.00005 0.00005 0.00002 0.00002 0.00001 100m 500m 1 0.00001 100m 2 500m Figure 15. Figure 16.
PAGE 9
LME49722 www.ti.com SNAS454A – MARCH 2008 – REVISED APRIL 2013 Typical Performance Characteristics (continued) PSRR+ vs Frequency +VCC = –VEE = 15V, VRIPPLE = 200mVPP, RL = 2kΩ -40 -50 -50 -60 -60 -70 -70 PSRR (dB) PSRR (dB) -40 PSRRvs Frequency +VCC = –VEE = 15V, VRIPPLE = 200mVPP, RL = 2kΩ -80 -90 -100 -80 -90 -100 -110 -110 -120 -120 -130 -130 -140 20 100 -140 20 10k 20k 1k 100 FREQUENCY (Hz) Figure 22.
PAGE 10
LME49722 SNAS454A – MARCH 2008 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) Supply Current vs Supply Voltage RL = 2kΩ 13.0 Full Power Bandwidth vs Frequency +VCC = –VEE = 15V, RL = 2kΩ 0 0 dB = 1VPP -10 MAGNITUDE (dB) SUPPLY CURRENT (mA) 12.5 12.0 11.5 11.0 -20 -30 -40 10.5 10.0 -50 0 2 4 6 8 10 12 14 16 18 20 1 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) SUPPLY VOLTAGE (V) Figure 27. Figure 28.
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LME49722 www.ti.com SNAS454A – MARCH 2008 – REVISED APRIL 2013 APPLICATION INFORMATION APPLICATION HINTS The LME49722 is a high speed operational amplifier which can operate stably in most of the applications. For the application with gain greater than 2, capacitive loads up to 100pF will cause little change in the phase characteristics of the amplifiers and are therefore allowable. Capacitive loads greater than 10pF must be isolated from the output, if the gain value is less than 2.
PAGE 12
LME49722 SNAS454A – MARCH 2008 – REVISED APRIL 2013 www.ti.com REVISION HISTORY 12 Rev Date 1.0 03/27/08 Description Initial release. A 04/04/13 Changed layout of National Data Sheet to TI format.
PAGE 13
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