lme49871 National Semiconductor Corporation, lme49871 Datasheet

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lme49871

Manufacturer Part Number
lme49871
Description
High Performance, High Fidelity Current Feedback Audio Operational Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet
© 2008 National Semiconductor Corporation
LME49871
High Performance, High Fidelity Current Feedback Audio
Operational Amplifier
General Description
The LME49871 is an ultra-low distortion, low noise, ultra high
slew rate current feedback operational amplifier optimized
and fully specified for high performance, high fidelity applica-
tions. Combining advanced leading-edge process technology
with state-of-the-art circuit design, the LME49871 current
feedback operational amplifier delivers superior signal ampli-
fication for outstanding performance. Operating on a wide
supply range of ±5V to ±22V, the LME49871 combines ex-
tremely low voltage noise density (1.9nV/
THD+N (0.00012%) to easily satisfy the most demanding ap-
plications. To ensure that the most challenging loads are
driven without compromise, the LME49871 has a high slew
rate of ±1900V/μs and an output current capability of ±100-
mA. Further, dynamic range is maximized by an output stage
that drives 150Ω loads to within 2.9V of either power supply
voltage.
The LME49871 's outstanding CMRR (88dB), PSRR (102dB),
and V
amplifier DC performance.
The LME49871 is available in an 8–lead narrow body SOIC.
Demonstration boards are available.
OS
(0.05mV) give the amplifier excellent operational
300426
Hz) with very low
Key Specifications
Features
Applications
■ 
■ 
■ 
■ 
■ 
■ 
■ 
■ 
■ 
■ 
(A
f = 1kHz)
(A
f = 1kHz)
(A
Easily drives 150Ω loads
Optimized for superior audio signal fidelity
Output short circuit protection
SOIC package
Ultra high quality 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
Power Supply Voltage Range
THD+N
THD+N
Input Noise Density
Slew Rate
Input Bias Current
Input Offset Voltage
PSRR
CMRR
V
V
Bandwidth
V
= 1, R
= 1, R
= 1, R
L
L
L
= 600Ω, V
= 100Ω, V
= 2kΩ, R
F
OUT
OUT
= 800Ω)
= 1.4V
= 2V
P-P
RMS
,
,
1.9nV/
±1900V/μs (typ)
0.00021% (typ)
0.00012% (typ)
213MHz (typ)
April 28, 2008
www.national.com
0.05mV (typ)
±5V to ±22V
102dB (typ)
1.8μA (typ)
90dB (typ)
Hz (typ)

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lme49871 Summary of contents

Page 1

... The LME49871 's outstanding CMRR (88dB), PSRR (102dB), and V (0.05mV) give the amplifier excellent operational OS amplifier DC performance. The LME49871 is available in an 8–lead narrow body SOIC. Demonstration boards are available. © 2008 National Semiconductor Corporation Key Specifications ■  Power Supply Voltage Range ■ ...

Page 2

... Connection Diagrams www.national.com SOIC Package Order Number LME49871MA See NS Package Number M08A LME49871MA Top Mark 30042602 N = National Logo Z = Assembly plant code Digit date code TT = Die traceability L49871 = LME49871 MA = Package code 2 30042601 ...

Page 3

... CM ≤ ≤ –10V V 10V ±10V OUT = 200Ω ∞ ≤ ≤ ≤ –40°C A MAX ≤ ±5.0V = 2kΩ LME49871 Typical Limit (Note 6) (Note 7) 0.00021 0.00012 RMS 0.00009 213 ±1900 30 50 0.26 0.6 1.9 4.0 11.5 16 160 ±0.05 ±1.0 0.29 102 100 1.8 6 4.5 4.7 1.3 5 (V+) – ...

Page 4

... 5MHz IN Open-Loop I = 0mA OUT = +25ºC, and at the Recommended Operation Conditions at the time of product A is measured at two supply voltages, ±7V and ±22V. PSRR = | 20log(ΔV 4 LME49871 Units Typical Limit (Limits) (Note 6) (Note 7) ±18.6 ±17.6 V (min) ±19.4 ±18.4 V (min) ±100 ±93 mA (min) ± ...

Page 5

Typical Performance Characteristics FFT of 1kHz Sinewave, 0dBr Input Magnitude 1kΩ, V OUT RMS L S FFT of 1kHz Sinewave, 0dBr Input Magnitude = 600Ω OUT RMS L ...

Page 6

FFT of 1kHz Sinewave, 0dBr Input Magnitude 1kΩ, V OUT RMS L FFT of 1kHz Sinewave, 0dBr Input Magnitude = 600Ω OUT RMS L FFT of 1kHz Sinewave, ...

Page 7

Output Voltage vs Supply Voltage = 600Ω, 1% THD 30042687 Supply Current ( Power Supply open L 30042689 Gain vs Frequency V = ±15V –2 S 30042605 ...

Page 8

Gain vs Frequency V = ±15V –10 S Gain vs Frequency V = ±15V Gain vs Frequency V = ±15V www.national.com 30042607 = 1.2kΩ 30042609 = 3kΩ 30042611 8 Gain vs Frequency ...

Page 9

Gain vs Frequency V = ±22V 2kΩ 30042684 Gain vs Frequency = 800Ω ±22V 30042686 Gain vs Frequency V = ±22V – 30042673 Gain vs Frequency V ...

Page 10

Gain vs Frequency V = ±22V www.national.com = –10 30042670 10 ...

Page 11

... Conversely, the LME49871 current feedback amplifier features a small-signal bandwidth that is relatively independent of the closed-loop gain. This is shown in Figure 1 where the LME49871’s gain is –1,–2, –5 and –10. Like all current feedback amplifiers, the LME49871’s closed-loop bandwidth is a function of the feed- back resistance value ...

Page 12

Revision History Rev 1.0 04/24/08 1.01 04/28/08 www.national.com Date Description Initial release. Changed the Limit values from –2.0 and +2.0 to –1.0 and +1.0. IN-CM ...

Page 13

... Physical Dimensions inches (millimeters) unless otherwise noted SOIC Package Order Number LME49871MA NS Package Number M08A 13 www.national.com ...

Page 14

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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