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LMH6624
Ultra Low Noise Wideband Operational Amplifier
General Description
The LMH6624 combines wide bandwidth (1.5 GBW) with
very low input noise (0.92nV/
low dc errors (100µV V
,
OS
precise operational amplifier with wide dynamic range. This
enables the user to achieve closed-loop gains of greater
than 10.
The LMH6624's traditional voltage feedback topology pro-
vides the following benefits: balanced inputs, low offset volt-
age and offset current, very low offset drift, 81dB open loop
gain, 95dB common mode rejection ratio, and 88dB power
supply rejection ratio.
The LMH6624 operates from
mode and from +5V to +12V in single supply configuration.
The LMH6624 is stable for closed-loop gain of A
+10 ≤ A
.
V
LMH6624 is offered in SOT23-5 and SOIC-8 packages.
Connection Diagrams
5-Pin SOT23
Top View
© 2003 National Semiconductor Corporation
, 2.3pA/
) and ultra
±
0.1µV/˚C drift) providing a very
±
±
2.5V to
6V in dual supply
≤ −10 or
V
20058951
DS200589
Features
±
V
=
6V, T
= 25˚C, A
S
A
V
specified)
n Gain bandwidth
n Input voltage noise
n Input offset voltage (limit over temp)
n Slew rate
n Slew rate (A
= 10)
V
n HD2
@
f = 10MHz, R
= 100Ω
L
@
n HD3
f = 10MHz, R
= 100Ω
L
n Supply voltage range (dual supply)
n Supply voltage range (single supply)
n Improved replacement for the CLC425
Applications
n Instrumentation sense amplifiers
n Ultrasound pre-amps
n Magnetic tape & disk pre-amps
n Wide band active filters
n Professional Audio Systems
n Opto-electronics
n Medical diagnostic systems
8−Pin SOIC
Top View
February 2003
= 20, (Typical values unless
1.5GHz
0.92nV/
700uV
350V/µs
400V/µs
−65dBc
−80dBc
±
±
2.5V to
6V
+5V to +12V
20058952
www.national.com
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Table of Contents
Related Manuals for National Semiconductor LMH6624
Summary of Contents for National Semiconductor LMH6624
-
Page 1: General Description
6V in dual supply n Improved replacement for the CLC425 mode and from +5V to +12V in single supply configuration. ≤ −10 or The LMH6624 is stable for closed-loop gain of A Applications +10 ≤ A n Instrumentation sense amplifiers LMH6624 is offered in SOT23-5 and SOIC-8 packages. -
Page 2: Absolute Maximum Ratings
(Note 1) Wave Soldering (10 sec.) 260˚C Storage Temperature Range −65˚C to +150˚C If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Junction Temperature (Note 4) +150˚C Distributors for availability and specifications. ESD Tolerance Operating Ratings... - Page 3 ± 2.5V Electrical Characteristics (Continued) − Unless otherwise specified, all limits guaranteed for at T = 25˚C, V = 2.5V, V = −2.5V, V = 0V, A = +20, R = 500Ω, R = 100Ω. Boldface limits apply at the temperature extremes. See (Note 12). Symbol Parameter Conditions...
- Page 4 ± 6V Electrical Characteristics (Continued) − Unless otherwise specified, all limits guaranteed for at T = 25˚C, V = 6V, V = −6V, V = 0V, A = +20, R = 500Ω, R 100Ω. Boldface limits apply at the temperature extremes. See (Note 12). Symbol Parameter Conditions...
-
Page 5: Ordering Information
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Note 2: Human body model, 1.5Ω... -
Page 6: Typical Performance Characteristics
Typical Performance Characteristics Noise vs. Frequency Amplifier Peaking with Varying R 20058917 20058950 Open Loop Frequency Response Over Temperature Open Loop Frequency Response Over Temperature 20058959 20058960 Frequency Response with Varying V Frequency Response with Varying V 20058913 20058914 www.national.com... - Page 7 Typical Performance Characteristics (Continued) Inverting Frequency Response Inverting Frequency Response 20058915 20058916 Non-Inverting Frequency Response Non-Inverting Frequency Response 20058904 20058903 Non-Inverting Frequency Response Varying V Non-Inverting Frequency Response Varying V 20058906 20058905 www.national.com...
- Page 8 Typical Performance Characteristics (Continued) Non-Inverting Frequency Response Varying V Non-Inverting Frequency Response Varying V 20058908 20058907 Frequency Response with Cap. Loading Frequency Response with Cap. Loading 20058940 20058941 Frequency Response with Cap. Loading Frequency Response with Cap. Loading 20058939 20058938 www.national.com...
- Page 9 Typical Performance Characteristics (Continued) Sourcing Current vs. V Sourcing Current vs. V 20058954 20058957 Sinking Current vs. V Sinking Current vs. V 20058956 20058958 vs. V vs. V SUPPLY SUPPLY 20058955 20058953 www.national.com...
- Page 10 Typical Performance Characteristics (Continued) Distortion vs. Frequency Distortion vs. Frequency 20058944 20058946 Distortion vs. Frequency Distortion vs. Gain 20058942 20058945 Distortion vs. V Peak to Peak Distortion vs. V Peak to Peak 20058947 20058943 www.national.com...
- Page 11 Typical Performance Characteristics (Continued) Non-Inverting Large Signal Pulse Response Non-Inverting Large Signal Pulse Response 20058909 20058910 Non-Inverting Small Signal Pulse Response Non-Inverting Small Signal Pulse Response 20058912 20058911 PSRR vs. Frequency PSRR vs. Frequency 20058948 20058949 www.national.com...
- Page 12 Typical Performance Characteristics (Continued) Input Referred CMRR vs. Frequency Input Referred CMRR vs. Frequency 20058901 20058902 www.national.com...
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Page 13: Application Section
TOTAL INPUT NOISE VS. SOURCE RESISTANCE INTRODUCTION To determine maximum signal-to-noise ratios from the The LMH6624, a very wide gain bandwidth, ultra low noise LMH6624, an understanding of the interaction between the voltage feedback operational amplifier, enables applications amplifier’s intrinsic noise sources and the noise arising from such as medical diagnostic ultrasound, magnetic tape &... - Page 14 +20V/V giving a −3dB of 90MHz NON-INVERTING GAINS LESS THAN 10V/V and driven from R = 25Ω, the LMH6624 produces a total Using the LMH6624 at lower non-inverting gains requires equivalent input noise voltage (e 1.57 90MHz) of external compensation such as the shunt compensation as 16.5µV...
- Page 15 FIGURE 9. Transimpedance Amplifier Configuration FIGURE 7. External Lag Compensation SINGLE SUPPLY OPERATION The LMH6624 can be operated with single power supply as shown in Figure 8. Both the input and output are capacitively coupled to set the DC operating point.
- Page 16 FIGURE 13. Noise Magnetic Media Equalizer FIGURE 11. Low Noise Integrator HIGH-GAIN SALLEN-KEY ACTIVE FILTERS The LMH6624 is well suited for high gain Sallen-Key type of active filters. Figure 12 shows the 2 order Sallen-Key low pass filter topology. Using component predistortion methods discussed in OA-21 enables the proper selection of compo- nents for these high-frequency filters.
- Page 17 These free evaluation boards are shipped when a device tortion. sample request is placed with National Semiconductor. Component value selection is another important parameter Device Package Evaluation Board Part in working with high speed/high performance amplifiers.
-
Page 18: Physical Dimensions
Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT23 NS Package Number MF05A 8-Pin SOIC NS Package Number M08A www.national.com... - Page 19 NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2.