NSC LMH6552, LMH6552MA Datasheet

April 2007

LMH6552
1 GHz Fully Differential Amplifier

General Description

The LMH6552 is a high performance fully differential amplifier
designed to provide the exceptional signal fidelity and wide
large-signal bandwidth necessary for driving 8 to 14 bit high
speed data acquisition systems. Using National's proprietary
differential current mode input stage architecture, the
LMH6552 allows operation at gains greater than unity without
sacrificing response flatness, bandwidth, harmonic distortion,
or output noise performance.

With external gain set resistors and integrated common mode
feedback, the LMH6552 can be configured as either a differ­ential input to differential output or single ended input to
differential output gain block. The LMH6552 can be AC or DC
coupled at the input which makes it suitable for a wide range
of applications including communication systems and high
speed oscilloscope front ends. The LMH6552 is available in
an 8-pin SOIC package as well as a space saving, thermally
enhanced 8-pin LLP package for higher performance.

Features

■

1.0 GHz bandwidth @ AV = 1

■

800 MHz bandwidth @ AV = 4

■

450 MHz 0.1 dB flatness

■

3800 V/µs slew rate

■

10 ns settling time to 0.1%

■

−90 dB THD @ 20 MHz

■

−74 dB THD @ 70 MHz

■

20 ns enable/shutdown pin

■

5 to 12V operation

Applications

■

Differential ADC driver

■

Video over twisted pair

■

Differential line driver

■

Single end to differential converter

■

High speed differential signaling

■

IF/RF amplifier

■

SAW filter buffer/driver

Typical Application

Single-Ended Input Differential Output

30003544

LMH™ is a trademark of National Semiconductor Corporation.

© 2007 National Semiconductor Corporation 300035 www.national.com

LMH6552 1 GHz Fully Differential Amplifier

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 6)
Human Body Model 2000V
Machine Model 200V
Supply Voltage 13.2V
Common Mode Input Voltage ±V

S

Maximum Input Current (pins 1, 2, 7, 8) 30 mA
Maximum Output Current (pins 4, 5) (Note 4)
Soldering Information

Infrared or Convection (20 sec) 235°C
Wave Soldering (10 sec) 260°C

Operating Ratings (Note 1)

Operating Temperature Range
(Note 3) −40°C to +85°C

Storage Temperature Range −65°C to +150°C
Total Supply Voltage 4.5V to 12V

Package Thermal Resistance (θJA) (Note 5)

8-Pin SOIC 150°C/W

±5V Electrical Characteristics (Note 2)

Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = +5V, V− = −5V, AV= 1, VCM = 0V, RF = RG = 357Ω,
RL = 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 8)

Typ

(Note 7)

Max

(Note 8)

Units

AC Performance (Differential)

SSBW Small Signal −3 dB Bandwidth

(Note 8)

V

OUT

= 0.2 VPP, AV = 1 1000

MHz

V

OUT

= 0.2 VPP, AV = 2 930

V

OUT

= 0.2 VPP, AV = 4 810

V

OUT

= 0.2 VPP, AV = 8 590

LSBW Large Signal −3 dB Bandwidth V

OUT

= 2 VPP, AV = 1 950

MHz

V

OUT

= 2 VPP, AV = 2 820

V

OUT

= 2 VPP, AV = 4 740

V

OUT

= 2 VPP, AV = 8 590

0.1 dB Bandwidth V

OUT

= 0.2 VPP, AV = 1 450 MHz

Slew Rate 4V Step, AV = 1 3800

V/μs

Rise/Fall Time, 10%-90% 2V Step 750 ps

0.1% Settling Time 2V Step 10 ns

Distortion and Noise Response

HD2 2nd Harmonic Distortion

V

OUT

= 2 VPP, f = 20 MHz, RL = 800Ω

−92
dBc

V

OUT

= 2 VPP, f = 70 MHz, RL = 800Ω

−74

HD3 3rd Harmonic Distortion

V

OUT

= 2 VPP, f = 20 MHz, RL = 800Ω

−93
dBc

V

OUT

= 2 VPP, f = 70 MHz, RL = 800Ω

−84

IMD3 Two-Tone Intermodulation Freq >70 MHz, Third Order Products,

V

OUT

= 2 VPP Composite

−87 dBc

Input Noise Voltage

f ≥ 1 MHz

1.1

nV/

Input Noise Current

f ≥ 1 MHz

19.5

pA/

Noise Figure (See Figure 5)

50Ω System, AV = 9, 10 MHz

10.3 dB

Input Characteristics

I

BI

Input Bias Current (Note 10) 60 110 µA

I

Boffset

Input Bias Current Differential
(Note 7)

VCM = 0V, VID = 0V, I

Boffset

= (I

B

−

- I

B

+

)/2 2.47 18 µA

CMRR Common Mode Rejection Ratio

(Note 7)

DC, VCM = 0V, VID = 0V 80 dBc

R

IN

Input Resistance Differential 15

Ω

C

IN

Input Capacitance Differential 0.5 pF

CMVR Input Common Mode Voltage

Range

CMRR > 38 dB ±3.5 ±3.8 V

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LMH6552

Symbol Parameter Conditions Min

(Note 8)

Typ

(Note 7)

Max

(Note 8)

Units

Output Performance

Output Voltage Swing (Note 7) Differential Output 14.8 15.4 V

PP

I

OUT

Linear Output Current (Note 7) V

OUT

= 0V ±70 ±80 mA

I

SC

Short Circuit Current One Output Shorted to Ground VIN = 2V

Single Ended (Note 6)

±141 mA

Output Balance Error

ΔV

OUT

Common Mode /ΔV

OUT

Differential , ΔVOD = 1V, f < 1 MHz

-60 dB

Miscellaneous Performance

Z

T

Open Loop Transimpedance Differential 108

dBΩ

PSRR Power Supply Rejection Ratio

DC, ΔVS = ±1V

80 dB

I

S

Supply Current (Note 7)

RL = ∞

19 22.5 25

28

mA

Enable Voltage Threshold 3.0 V

Disable Voltage Threshold 2.0 V

Enable/Disable time 15 ns

I

SD

Disable Shutdown Current 500 600

μA

Output Common Mode Control Circuit

Common Mode Small Signal

Bandwidth

V

IN

+

= V

IN

−

= 0 400 MHz

Slew Rate V

IN

+

= V

IN

−

= 0 607

V/μs

V

OSCM

Input Offset Voltage Common Mode, VID = 0, VCM = 0 1.5 ±16.5 mV

Input Bias Current (Note 9) −3.2 ±8 µA

Voltage Range ±3.7 ±3.8 V

CMRR Measure VOD, VID = 0V 80 dB

Input Resistance 200

kΩ

Gain

ΔV

O,CM

/ΔV

CM

0.995 1.0 1.012 V/V

±2.5V Electrical Characteristics (Note 2)

Unless otherwise specified, all limits are guaranteed for TA = 25°C, V+ = +2.5V, V− = −2.5V, AV = 1, VCM = 0V, RF = RG = 357Ω,
RL = 500Ω, for single ended in, differential out. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 8)

Typ

(Note 7)

Max

(Note 8)

Units

SSBW Small Signal −3 dB Bandwidth

(Note 8)

V

OUT

= 0.2 VPP, AV = 1 800

MHz

V

OUT

= 0.2 VPP, AV = 2 740

V

OUT

= 0.2 VPP, AV = 4 660

V

OUT

= 0.2 VPP, AV = 8 498

LSBW Large Signal −3 dB Bandwidth V

OUT

= 2 VPP, AV = 1 690

MHz

V

OUT

= 2 VPP, AV = 2 620

V

OUT

= 2 VPP, AV = 4 589

V

OUT

= 2 VPP, AV = 8 480

0.1 dB Bandwidth V

OUT

= 0.2 VPP, AV = 1 300 MHz

Slew Rate 2V Step, AV = 1 2100

V/μs

Rise/Fall Time, 10% to 90% 2V Step 1.2 ns

0.1% Settling Time 2V Step 10 ns

Distortion and Noise Response

HD2 2nd Harmonic Distortion

V

OUT

= 2 VPP, f = 20 MHz, RL = 800Ω

82

dBc

V

OUT

= 2 VPP, f = 70 MHz, RL = 800Ω

65

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LMH6552

Symbol Parameter Conditions Min

(Note 8)

Typ

(Note 7)

Max

(Note 8)

Units

HD3 3rd Harmonic Distortion

V

OUT

= 2 VPP, f = 20 MHz, RL = 800Ω

79

dBc

V

OUT

= 2 VPP, f = 70 MHz, RL = 800Ω

67

IMD3 Two-Tone Intermodulation

f ≥ 70 MHz, Third Order Products,
V

OUT

= 2 VPP Composite

−77 dBc

Input Noise Voltage

f ≥ 1 MHz

1.1

nV/

Input Noise Current

f ≥ 1 MHz

19.5

pA/

Noise Figure (See Figure 5)

50Ω System, AV = 9, 10 MHz

10.2 dB

Input Characteristics

I

BI

Input Bias Current (Note 10) 54 90 µA

I

Boffset

Input Bias Current Differential
(Note 7)

VCM = 0V, VID = 0V, I

Boffset

= (I

B

−

- I

B

+

)/2 2.3 18

μA

CMRR Common-Mode Rejection Ratio

(Note 7)

DC, VCM = 0V, VID = 0V 75 dBc

R

IN

Input Resistance Differential 15

Ω

C

IN

Input Capacitance Differential 0.5 pF

CMVR Input Common Mode Range CMRR > 38 dB 1.5-3.5 1.2-3.8 V

Output Performance

Output Voltage Swing (Note 7) Differential Output 5.6 6.0 V

PP

I

OUT

Linear Output Current (Note 7) V

OUT

= 0V ±55 ±65 mA

I

SC

Short Circuit Current One Output Shorted to Ground, VIN = 2V

Single Ended (Note 6)

±131 mA

Output Balance Error

ΔV

OUT

Common Mode /ΔV

OUT

Differential , ΔVOD = 1V, f < 1 MHz

60 dB

Miscellaneous Performance

ZT Open Loop Transimpedance Differential 107

dBΩ

PSRR Power Supply Rejection Ratio

DC, ΔVS = ±1V

80 dB

I

S

Supply Current (Note 7)

RL = ∞

17 20.4 24

27

mA

Enable Voltage Threshold 3.0 V

Disable Voltage Threshold 2.0 V

Enable/Disable time 15 ns

I

SD

Disable Shutdown Current 500 600 µA

Output Common Mode Control Circuit

Common Mode Small Signal

Bandwidth

V

IN

+

= V

IN

−

= 0 310 MHz

Slew Rate V

IN

+

= V

IN

−

= 0 430

V/μs

V

OSCM

Input Offset Voltage Common Mode, VID = 0, VCM = 0 1.65 ±15 mV

Input Bias Current (Note 9) −2.9 µA

Voltage Range ±1.19 ±1.25 V

CMRR Measure VOD, VID = 0V 80 dB

Input Resistance 200

kΩ

Gain

ΔV

O,CM

/ΔV

CM

0.995 1.0 1.012 V/V

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LMH6552

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 TJ = TA. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self-heating where
TJ > TA. See Applications Section 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: The maximum power dissipation is a function of T

J(MAX)

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

PD = (T

J(MAX)

– TA) / θJA. All numbers apply for packages soldered directly onto a PC Board.

Note 4: The maximum output current (I

OUT

) is determined by device power dissipation limitations. See the Power Dissipation section of the Application Section

for more details.

Note 5: Human Body Model, applicable std. MIL-STD-883, Method 30157. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of JEDEC). Field­Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).

Note 6: Short circuit current should be limited in duration to no more than 10 seconds. See the Power Dissipation section of the Application Information for more
details.

Note 7: Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary over time and will
also depend on the application and configuration. The typical values are not tested and are not guaranteed on shipped production material.

Note 8: Limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality
Control (SQC) methods.

Note 9: Negative input current implies current flowing out of the device.

Note 10: IBI is referred to a differential output offset voltage by the following relationship: V

OD(offset)

= IBI*2R

F

Connection Diagram

8-Pin SOIC

30003508

Top View

Ordering Information

Package Part Number Package Marking Transport Media NSC Drawing

8-Pin SOIC

LMH6552MA

LMH6552MA

95/Rails

M08A

LMH6552MAX 2.5k Units Tape and Reel

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LMH6552

Typical Performance Characteristics V+ = +5V, V− = −5V (T

A

= 25°C, RF = RG =

357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified).

Frequency Response vs. Gain

30003547

Frequency Response vs. Gain

30003534

Frequency Response vs. V

OUT

30003548

Frequency Response vs. V

OUT

30003516

Frequency Response vs. Supply Voltage

30003514

Frequency Response vs. Supply Voltage

30003515

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LMH6552