Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Current feedback UQFN 14 (2.5x2.5)

91:

LMH6554

CMO

91:

50:

200:

ADC

Up To 16-Bit

Data Converter

76.8:

= 50:

30:

0.1 PF

AC-Coupled

Source

0.1 PF

LMH6554

www.ti.com

SNOSB30O –OCTOBER 2008–REVISED MARCH 2013

LMH6554 2.8 GHz Ultra Linear Fully Differential Amplifier

Check for Samples: LMH6554

FEATURES

DESCRIPTION

The LMH6554 is a high performance fully differential

• Small Signal Bandwidth 2.8 GHz

amplifier designed to provide the exceptional signal

• 2 V

Large Signal Bandwidth 1.8 GHz

fidelity and wide large-signal bandwidth necessary for

• 0.1 dB Gain Flatness 830 MHz

driving 8 to 16 bit high speed data acquisition

systems. Using TI’s proprietary differential current

• OIP3 @ 150 MHz 46.5 dBm

mode input stage architecture, the LMH6554 has

• HD2/HD3 @ 75 MHz -96 / -97 dBc

unity gain, small-signal bandwidth of 2.8 GHz and

• Input Noise Voltage 0.9 nV/√Hz

allows operation at gains greater than unity without

sacrificing response flatness, bandwidth, harmonic

• Input Noise Current 11 pA/√Hz

distortion, or output noise performance.

• Slew Rate 6200 V/μs

The device's low impedance differential output is

• Power 260mW

designed to drive ADC inputs and any intermediate

• Typical Supply Current 52 mA

filter stage. The LMH6554 delivers 16-bit linearity up

• Package 14 Lead UQFN

to 75 MHz when driving 2V peak-to-peak into loads

as low as 200Ω.

APPLICATIONS

The LMH6554 is fabricated in Texas Instruments'

• Differential ADC Driver

advanced complementary BiCMOS process and is

available in a space saving 14 lead UQFN package

• Single-Ended to Differential Converter

for higher performance.

• High Speed Differential Signaling

• IF/RF and Baseband Gain Blocks

• SAW Filter Buffer/Driver

• Oscilloscope Probes

• Automotive Safety Applications

• Video Over Twisted Pair

• Differential Line Driver

Typical Application

Figure 1. Single to Differential 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 (24 pages)

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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 LMH6554 2.8 GHz Ultra Linear Fully Differential Amplifier Check for Samples: LMH6554 FEATURES DESCRIPTION • • • • • • • • • • • The LMH6554 is a high performance fully differential amplifier designed to provide the exceptional signal fidelity and wide large-signal bandwidth necessary for driving 8 to 16 bit high speed data acquisition systems.
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LMH6554 SNOSB30O – OCTOBER 2008 – 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) (3) Human Body Model 2000V Machine Model 250V Charge Device Model 750V − Supply Voltage (VS = V - V ) 5.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 +5V Electrical Characteristics (1) Unless otherwise specified, all limits are ensured for TA = +25°C, AV = +2, V+ = +2.5V, V− = −2.5V, RL = 200Ω, VCM = (V++V)/2, RF = 200Ω, for single-ended in, differential out. Boldface Limits apply at the temperature extremes.
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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com +5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits are ensured for TA = +25°C, AV = +2, V+ = +2.5V, V− = −2.5V, RL = 200Ω, VCM = (V++V)/2, RF = 200Ω, for single-ended in, differential out. Boldface Limits apply at the temperature extremes. Symbol Parameter Conditions Min (2) Typ (3) Max (2) Units 19 Ω 1 pF ±1.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 Connection Diagram V - 3 + VCM V 2 1 14 NC +FB 4 RF -IN 5 13 +OUT +IN 6 12 -OUT -FB 7 11 NC RG RG RF 8 V - 9 10 VEN V + Figure 2.
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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics VS = ±2.5V (TA = 25°C, RF = 200Ω, RG = 90Ω, RT = 76.8Ω, RL = 200Ω, AV = +2, for single ended in, differential out, unless specified). Frequency Response vs. RF 2 Frequency Response vs. Gain 2 RF = 200: 1 0 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 0 -1 RF = 250: -2 -3 RF = 300: -4 -5 -6 -7 -1 -10 1 AV = 2 V/V -2 -3 AV = 4 V/V -4 -5 AV = 8 V/V -6 -7 -8 -9 AV = 1 V/V 1 -8 -9 VOD = 0.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 Typical Performance Characteristics VS = ±2.5V (continued) (TA = 25°C, RF = 200Ω, RG = 90Ω, RT = 76.8Ω, RL = 200Ω, AV = +2, for single ended in, differential out, unless specified). 2 VPP Pulse Response Single Ended Input 0.3 1.5 0.2 1.0 0.1 0.5 VOD (V) VOD (V) 0.5 VPP Pulse Response Single Ended Input 0 0 -0.1 -0.5 -0.2 -1.0 -0.3 0 1 2 3 4 5 6 7 8 9 -1.5 0 10 1 2 3 4 TIME (ns) 7 8 9 10 Figure 10.
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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics VS = ±2.5V (continued) (TA = 25°C, RF = 200Ω, RG = 90Ω, RT = 76.8Ω, RL = 200Ω, AV = +2, for single ended in, differential out, unless specified). Distortion vs. Output Common Mode Voltage 3rd Order Intermodulation Products vs VOUT -20 -80 RL = 200: VOD = 2 VPP fc = 150 MHz -30 -85 DISTORTION (dBc) -40 150 MHz IMD 3 (dBc) -50 -60 HD3 -70 -90 -95 75 MHz -80 -100 HD2 -90 -100 -1.0 -0.5 0 0.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 Typical Performance Characteristics VS = ±2.5V (continued) (TA = 25°C, RF = 200Ω, RG = 90Ω, RT = 76.8Ω, RL = 200Ω, AV = +2, for single ended in, differential out, unless specified). Minimum VOUT vs. IOUT Overdrive Recovery 0 1.2 3 INPUT VIN = 1.7V SINGLE-ENDED INPUT -0.6 -0.8 -1.0 -1.2 OUTPUT 40 60 80 0 0 -1.4 20 0.4 1 -1 -0.4 -2 -0.8 -3 0 100 200 400 OUTPUT CURRENT (mA) -1.2 1000 Figure 22.
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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics VS = ±2.5V (continued) (TA = 25°C, RF = 200Ω, RG = 90Ω, RT = 76.8Ω, RL = 200Ω, AV = +2, for single ended in, differential out, unless specified). Differential S-Parameter Magnitude vs.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 APPLICATION INFORMATION The LMH6554 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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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com Here is the expression for the input impedance, RIN, as defined in Figure 30: RIN = 2RG When driven from a differential source, the LMH6554 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 greater than 70 dB, using 0.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 When using the LMH6554 in single-to-differential mode, the complimentary output is forced to a phase inverted replica of the driven output by the common mode feedback circuit as opposed to being driven by its own complimentary input. Consequently, as the driven input changes, the common mode feedback action results in a varying common mode voltage at the amplifier's inputs, proportional to the driving signal.
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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com Split Supply Operation For optimum performance, split supply operation is recommended using +2.5V and −2.5V supplies; however, operation is possible on split supplies as low as +2.35V and −2.35V and as high as +2.65V and −2.65V. Provided the total supply voltage does not exceed the 4.7V to 5.3V operating specification, non-symmetric supply operation is also possible and in some cases advantageous.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 200: 91: RS = 50: VS C a V 76.8: AC-Coupled Source + 50: 0.1 PF VCM ADC + - Up To 16-Bit Data Converter LMH6554 - + 91: 50: - 30: VCMO V 0.1 PF 0.1 PF VEN 200: Figure 34.
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LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com Balanced Cable Driver With up to 5.68 VPP differential output voltage swing the LMH6554 can be configured as a cable driver. The LMH6554 is also suitable for driving differential cables from a single ended source as shown in Figure 36. 200: 50: 91: RS = 50: + VS a 76.8: Input Source VCM 2 VPP LMH6554 91: VEN 50: 30.3: 100: TWISTED PAIR 200: Figure 36.
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LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 V + 0.01 PF 0.1 PF 10 PF +IN VCM + -OUT LMH6554 -IN +OUT - 0.1 PF VEN 0.01 PF Figure 38. Single Supply Bypassing Capacitors Power Dissipation The LMH6554 is optimized for maximum speed and performance in a small form factor 14 lead UQFN package. To ensure maximum output drive and highest performance, thermal shutdown is not provided.
PAGE 18
LMH6554 SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 www.ti.com ESD Protection The LMH6554 is protected against electrostatic discharge (ESD) on all pins. The LMH6554 will survive 2000V Human Body model and 250V Machine model events. Under normal operation the ESD diodes have no affect on circuit performance. There are occasions, however, when the ESD diodes will be evident. If the LMH6554 is driven by a large signal while the device is powered down the ESD diodes will conduct.
PAGE 19
LMH6554 www.ti.com SNOSB30O – OCTOBER 2008 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision N (March 2013) to Revision O • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMH6554LE/NOPB UQFN NHJ 14 LMH6554LEE/NOPB UQFN NHJ LMH6554LEX/NOPB UQFN NHJ SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1000 178.0 12.4 2.8 2.8 1.0 8.0 12.0 Q1 14 250 178.0 12.4 2.8 2.8 1.0 8.0 12.0 Q1 14 4500 330.0 12.4 2.8 2.8 1.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMH6554LE/NOPB UQFN NHJ 14 1000 213.0 191.0 55.0 LMH6554LEE/NOPB UQFN NHJ 14 250 213.0 191.0 55.0 LMH6554LEX/NOPB UQFN NHJ 14 4500 367.0 367.0 35.
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MECHANICAL DATA NHJ0014A LEE14A (Rev B) www.ti.
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