NSC LMH6628MDC, LMH6628MAX, LMH6628MA Datasheet

LMH6628
Dual Wideband, Low Noise, Voltage Feedback Op Amp

General Description

The National LMH6628 is a high speed dual op amp that
offers a traditional voltage feedback topology featuring unity
gain stability and slew enhanced circuitry. The LMH6628’s
low noise and very low harmonic distortion combine to form
a wide dynamic range op amp that operates from a single
(5V to 12V) or dual (

±

5V) power supply.

Each of the LMH6628’s closely matched channels provides
a 300MHz unity gain bandwidth and low input voltage noise
density (2nV/

). Low 2nd/3rd harmonic distortion (−65/

−74dBc at 10MHz) make the LMH6628 a perfect wide dy­namic range amplifier for matched I/Q channels.

With its fast and accurate settling (12ns to 0.1%), the
LMH6628 is also an excellent choice for wide dynamic
range, anti-aliasing filters to buffer the inputs of hi resolution
analog-to-digital converters. Combining the LMH6628’s two
tightly matched amplifiers in a single 8-pin SOIC package
reduces cost and board space for many composite amplifier
applications such as active filters, differential line drivers/
receivers, fast peak detectors and instrumentation amplifi­ers.

The LMH6628 is fabricated using National’s VIP10

™

com-

plimentary bipolar process.

To reduce design times and assist in board layout, the
LMH6628 is supported by an evaluation board
(CLC730036).

Features

n Wide unity gain bandwidth: 300MHz
n Low noise: 2nV/
n Low Distortion: −65/−74dBc (10MHz)
n Settling time: 12ns to 0.1%
n Wide supply voltage range:

±

2.5V to±6V

n High output current:

±

85mA

n Improved replacement for CLC428

Applications

n High speed dual op amp
n Low noise integrators
n Low noise active filters
n Driver/receiver for transmission systems
n High speed detectors
n I/Q channel amplifiers

Connection Diagram

8-Pin SOIC

20038535

Top View

Inverting Frequency Response

20038515

January 2003

LMH6628 Dual Wideband, Low Noise, Voltage Feedback Op Amp

© 2003 National Semiconductor Corporation DS200385 www.national.com

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

ESD Tolerance (Note 4)

Human Body Model 2kV

Machine Model 200V

Supply Voltage 13.5

Short Circuit Current (Note 3)

Common-Mode Input Voltage V

+-V−

Differential Input Voltage V+-V

−

Maximum Junction Temperature +150˚C

Storage Temperature Range −65˚C to +150˚C

Lead Temperature (soldering 10 sec) +300˚C

Operating Ratings (Note 1)

Thermal Resistance (Note 5)

Package (θ

JC

)(θJA)

SOIC 65˚C/W 145˚C/W

Temperature Range −40˚C to +85˚C

Nominal Supply Voltage

±

2.5V to±6V

Electrical Characteristics (Note 2)

VCC=±5V, AV= +2V/V, RF= 100Ω,RG= 100Ω,RL= 100Ω; unless otherwise specified. Boldface limits apply at the
temperature extremes.

Symbol Parameter Conditions Min Typ Max Units

Frequency Domain Response

GB Gain Bandwidth Product V

O

<

0.5V

PP

200 MHz

SSBW -3dB Bandwidth, A

V

=+1 V

O

<

0.5V

PP

180 300 MHz

SSBW -3dB Bandwidth, A

V

=+2 V

O

<

0.5V

PP

100 MHz

GFL Gain Flatness V

O

<

0.5V

PP

GFP Peaking DC to 200MHz 0.0 dB

GFR Rolloff DC to 20MHz .1 dB

LPD Linear Phase Deviation DC to 20MHz .1 deg

Time Domain Response

TR Rise and Fall Time 1V Step 4 ns

TS Settling Time 2V Step to 0.1% 12 ns

OS Overshoot 1V Step 1 %

SR Slew Rate 4V Step 300 550 V/µs

Distortion And Noise Response

HD2 2nd Harmonic Distortion 1V

PP

, 10MHz −65 dBc

HD3 3rd Harmonic Distortion 1V

PP

, 10MHz −74 dBc

Equivalent Input Noise

V

N

Voltage 1MHz to 100MHz 2 nV/

I

N

Current 1MHz to 100MHz 2 pA/

XTLKA Crosstalk Input Referred, 10MHz −62 dB

Static, DC Performance

G

OL

Open-Loop Gain 56

53

63 dB

V

IO

Input Offset Voltage

±

.5

±

2

±

2.6

mV

DV

IO

Average Drift 5 µV/˚C

I

BN

Input Bias Current

±

.7

±

20

±

30

µA

DI

BN

Average Drift 150 nA/˚C

I

OS

Input Offset Current 0.3

±

6µA

I

OSD

Average Drift 5 nA/˚C

PSRR Power Supply Rejection Ratio 60

46

70 dB

CMRR Common-Mode Rejection Ratio 57

54

62 dB

I

CC

Supply Current Per Channel, RL=

∞

7.5

7.0

912

12.5

mA

LMH6628

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Electrical Characteristics (Note 2) (Continued)

VCC=±5V, AV= +2V/V, RF= 100Ω,RG= 100Ω,RL= 100Ω; unless otherwise specified. Boldface limits apply at the
temperature extremes.

Symbol Parameter Conditions Min Typ Max Units

Miscellaneous Performance

R

IN

Input Resistance Common-Mode 500 kΩ

Differential-Mode 200 kΩ

C

IN

Input Capacitance Common-Mode 1.5 pF

Differential-Mode 1.5 pF

R

OUT

Output Resistance Closed-Loop .1 Ω

V

O

Output Voltage Range RL=

∞

±

3.8 V

V

OL

RL= 100Ω

±

3.2

±

3.1

±

3.5 V

CMIR Input Voltage Range Common- Mode

±

3.7 V

I

O

Output Current

±

50

±

85 mA

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, see the Electrical Characteristics tables.

Note 2: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of
the device such that T

J=TA

. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self heating where T

J

>

TA.
See Note 6 for information on temperature de-rating of this device." Min/Max ratings are based on product characterization and simulation. Individual parameters
are tested as noted.

Note 3: Output is short circuit protected to ground, however maximum reliability is obtained if output current does not exceed 160mA.

Note 4: Human body model, 1.5kΩ in series with 100pF. Machine model, 0Ω In series with 200pF.

Note 5: The maximum power dissipation is a function of T

J(MAX)

, θJAand TA. The maximum allowable power dissipation at any ambient temperature is

P

D

=(T

J(MAX)-TA

)/ θJA. All numbers apply for packages soldered directly onto a PC board.

Ordering Information

Package Part Number Package Marking Transport Media NSC Drawing

8-pin SOIC LMH6628MA LMH6628MA Rails M08A

LMH6628MAX 2.5k Units Tape and Reel

LMH6628

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Typical Performance Characteristics (T

A

= +25˚, AV= +2, VCC=±5V, Rf=100Ω,RL= 100Ω, un-

less specified)

Non-Inverting Frequency Response Inverting Frequency Response

20038513

20038515

Frequency Response vs. Load Resistance Frequency Response vs. Output Amplitude

20038525

20038510

Frequency Response vs. Capacitive Load Gain Flatness & Linear Phase

20038516

20038524

LMH6628

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