Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Current feedback WSON 8 (3x2.5)

127:

LMH6552

22 pF

REF

127:

100:

274:

ADC14DS105

14-Bit

105

MSPS

620 nH

49.9:

68.1:

0.1 PF

50:

Single-Ended

AC-coupled

Source

LMH6552

www.ti.com

SNOSAX9H –APRIL 2007–REVISED MARCH 2013

1.5 GHz Fully Differential Amplifier

Check for Samples: LMH6552

FEATURES

DESCRIPTION

The LMH6552 is a high performance fully differential

• 1.5 GHz −3 dB Small Signal

amplifier designed to provide the exceptional signal

Bandwidth @ A

= 1

fidelity and wide large-signal bandwidth necessary for

• 1.25 GHz −3 dB Large Signal

driving 8 to 14 bit high speed data acquisition

Bandwidth @ A

= 1

systems. Using TI's proprietary differential current

mode input stage architecture, the LMH6552 allows

• 800 MHz Bandwidth @ A

= 4

operation at gains greater than unity without

• 450 MHz 0.1 dB Flatness

sacrificing response flatness, bandwidth, harmonic

• 3800 V/µs Slew Rate

distortion, or output noise performance.

• 10 ns Settling Time to 0.1%

With external gain set resistors and integrated

– −90 dB THD @ 20 MHz

common mode feedback, the LMH6552 can be

configured as either a differential input to differential

– −74 dB THD @ 70 MHz

output or single ended input to differential output gain

• 20 ns Enable/Shutdown Pin

block. The LMH6552 can be AC or DC coupled at the

• 5 to 12V Operation

input which makes it suitable for a wide range of

applications including communication systems and

APPLICATIONS

high speed oscilloscope front ends. The performance

of the LMH6552 driving an ADC14DS105 is 86 dBc

• Differential ADC Driver

SFDR and 74 dBc SNR up to 40 MHz.

• Video Over Twisted Pair

The LMH6552 is available in an 8-pin SOIC package

• Differential Line Driver

as well as a space saving, thermally enhanced 8-Pin

• Single End to Differential Converter

WSON package for higher performance.

• High Speed Differential Signaling

• IF/RF Amplifier

• Level Shift Amplifier

• SAW Filter Buffer/Driver

Typical Application

Figure 1. Single-Ended Input Differential Output ADC Driver

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 (32 pages)

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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 1.5 GHz Fully Differential Amplifier Check for Samples: LMH6552 FEATURES DESCRIPTION 1 • 2 • • • • • • • 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.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com 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 ESD Tolerance (1) (2) Human Body Model 2000V Machine Model 200V Supply Voltage 13.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 ±5V Electrical Characteristics (1) Unless otherwise specified, all limits are ensured 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 (2) Typ (3) Max (2) Units AC Performance (Differential) SSBW LSBW Small Signal −3 dB Bandwidth (2) Large Signal −3 dB Bandwidth VOUT = 0.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com ±5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits are ensured 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.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 ±2.5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits are ensured 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 (2) Typ (3) Max (2) Units 0.1 dB Bandwidth VOUT = 0.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com ±2.5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits are ensured 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 VOSCM Parameter Input Offset Voltage Input Bias Current Conditions Min Common Mode, VID = 0, VCM = 0 (7) Input Resistance (7) (3) Max (2) ±15 −2.9 ±1.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 Typical Performance Characteristics V+ = +5V, V− = −5V (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). Frequency Response vs. Gain Frequency Response vs. Gain 1 0 -1 -2 AV = 4 AV = 2 -3 -4 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 1 AV = 1 0 AV = 8 -5 -6 -7 VOUT = 0.2 VPP -8 -1 -3 AV = 4 -4 -5 AV = 2 -6 -7 VOUT = 0.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics V+ = +5V, V− = −5V (continued) (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). Frequency Response vs. Capacitive Load Suggested ROUT vs. Capacitive Load 30 1 -1 CL = 82 pF, RO = 16: -2 SUGGESTED RO (:) NORMALIZED GAIN (dB) 0 CL = 39 pF, RO = 21: -3 CL = 15 pF, RO = 24: -4 CL = 5.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 Typical Performance Characteristics V+ = +5V, V− = −5V (continued) (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). 2 VPP Pulse Response Single Ended Input Large Signal Pulse Response 1.5 2.5 2 1 1.5 1 VOD (V) VOD (V) 0.5 0 0.5 0 -0.5 + + -0.5 V = +5 V = -5V -1 0 5 RL = 500: -2 -2.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics V+ = +5V, V− = −5V (continued) (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). Distortion vs. Output Common Mode Voltage -40 Distortion vs.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 Typical Performance Characteristics V+ = +5V, V− = −5V (continued) (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). Closed Loop Output Impedance 1000 Closed Loop Output Impedance 1000 + V = +5V 100 V- = -5V 10 - 100 VIN = 0V AV = 1 V/V V = -2.5 VIN = 0V AV = 1 V/V 10 |Z| (:) 1 |Z| (:) + V = +2.5V 0.1 1 0.01 0.1 0.001 10 1 0.1 100 0.01 0.01 1000 0.1 Figure 28.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics V+ = +5V, V− = −5V (continued) (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). CMRR Balance Error 85 80 -10 -15 BALANCE ERROR (dBc) 75 70 65 CMRR (dB) 60 55 50 45 40 AV = 2 V/V 35 RL = 500: 30 R = 357: F 25 VOUT = 1.0 VPP 20 0.1 10 1 100 1000 + -20 V = +2.5V -25 V = -2.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 Typical Performance Characteristics V+ = +5V, V− = −5V (continued) (TA = 25°C, RF = RG = 357Ω, RL = 500Ω, AV = 1, for single ended in, differential out, unless specified). Differential S-Parameter Phase vs. Frequency 3rd Order Intermodulation Products vs.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com APPLICATION INFORMATION The LMH6552 is a fully differential current feedback amplifier with integrated output common mode control, designed to provide low distortion amplification to wide bandwidth differential signals.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 RF RO RG VS + CL VCM a RL VO RG RO RF ENABLE Figure 44. Typical Application When driven from a differential source, the LMH6552 provides low distortion, excellent balance, and common mode rejection. This is true provided the resistors RF, RG and RO are well matched and strict symmetry is observed in board layout. With an intrinsic device CMRR of 80 dB, using 0.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com RF AV, RIN V RS + RG RO + VS a VCM RT - + - ADC + - IN+ RO RG RM IN- VO LMH6552 V - RF § ¨ ¨ © § RG E1 = ¨R + R ¨ G F © § ¨ ¨ © § 2(1 - E1) AV = ¨¨ © E1 + E2 § ¨ ¨ © § ¨ ¨ © §2RG + RM (1-E2) RIN = ¨¨ 1 + E2 © § RG + RM E2 = ¨¨R + R + R F M © G RS = RT || RIN RM = RT || RS Figure 46.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 The circuit shown in Figure 47 was used to measure S-parameters for a single-to-differential configuration. Figure 39 and Figure 40 in Typical Performance Characteristics are taken using the recommended component values for 0 dB gain.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com 275: V RS = 50: 1 PF 2:1 (TURNS) 10: VCM a VS + + - + 10: 50: 50: VO LMH6552 1 PF V - 275: AV = 9 V/V Figure 49. Noise Figure Circuit Configuration DRIVING ANALOG TO DIGITAL CONVERTERS Analog-to-digital converters present challenging load conditions. They typically have high impedance inputs with large and often variable capacitive components.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 90 SFDR (dBc) 85 80 (dB) 75 70 65 SNR (dBFs) 60 55 50 0 5 10 15 20 25 30 35 40 INPUT FREQUENCY (MHz) Figure 51. LMH6552/ADC12DL080 SFDR and SNR Performance vs. Frequency Figure 52 shows a combination circuit of the LMH6552 driving the ADC14DS105. The ADC14DS105 is a dual channel 14-bit ADC with a sampling rate of 105 MSPS.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com 100 95 SFDR (dBc) 90 85 (dB) 80 75 70 SNR (dBFs) 65 60 55 50 0 5 10 15 20 25 30 35 40 INPUT FREQUENCY (MHz) Figure 53. LMH6552/ADC14DS105 SFDR and SNR Performance vs. Frequency The amplifier and ADC should be located as close as possible. Both devices require that the filter components be in close proximity to them.
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LMH6552 www.ti.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com 100: TWISTED PAIR 357: 50: 169: RS = 50: + VS a VCM 61.8: - 2 VPP 169: 27.6: 50: 357: AV = 2 V/V ENABLE Figure 54. Fully Differential Cable Driver POWER SUPPLY BYPASSING The LMH6552 requires supply bypassing capacitors as shown in Figure 55 and Figure 56. The 0.01 µF and 0.1 µF capacitors should be leadless SMT ceramic capacitors and should be no more than 3 mm from the supply pins.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 V + 10 PF 0.1 PF 0.01 PF + VCM 0.1 PF ENABLE 0.01 PF Figure 56. Single Supply Bypassing Capacitors POWER DISSIPATION The LMH6552 is optimized for maximum speed and performance in the small form factor of the standard SOIC package, and is essentially a dual channel amplifier. To ensure maximum output drive and highest performance, thermal shutdown is not provided.
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LMH6552 SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 www.ti.com THERMAL PERFORMANCE The WSON package is designed for enhanced thermal performance and features an exposed die attach pad (DAP) at the bottom center of the package that creates a direct path to the PCB for maximum power dissipation. The DAP is floating and is not electrically connected to internal circuitry.
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LMH6552 www.ti.com SNOSAX9H – APRIL 2007 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision G (March 2013) to Revision H • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 21-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LMH6552MAX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMH6552SD/NOPB WSON NGS 8 1000 178.0 12.4 3.3 2.8 1.0 8.0 12.0 Q1 LMH6552SDX/NOPB WSON NGS 8 4500 330.0 12.4 3.3 2.8 1.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 21-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMH6552MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMH6552SD/NOPB WSON NGS 8 1000 210.0 185.0 35.0 LMH6552SDX/NOPB WSON NGS 8 4500 367.0 367.0 35.
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MECHANICAL DATA NGS0008C SDA08C (Rev A) www.ti.
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