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LMH6551Q是德州仪器（TI）推出的一款高性能、高速差分运算放大器，专门设计用于驱动高精度ADC（模拟数字转换器）、处理各种视频和数据格式，以及在高速差分信号传输中应用。该器件具有以下显著特点： 1. **370 MHz -3 dB带宽**：这表明LMH6551Q能在高达370 MHz的频率下保持良好的增益带宽积，适合高速信号处理应用。 2. **50 MHz 0.1 dB带宽**：此参数表示在0.1 dB增益平坦度下降点时的频率，意味着在50 MHz时，放大器的增益下降不超过0.1 dB，保证了中高频段的信号质量。 3. **2400 V/μs增益带宽乘积**：这一指标反映了LMH6551Q的快速响应能力，能够在极短时间内改变输出电压，适用于高速信号处理。 4. **18 nssettling time to 0.05%**：在18纳秒内，LMH6551Q能够将输出信号稳定到0.05%的精度，确保了快速且准确的信号传输。 5. **低失真**：在5 MHz时，LMH6551Q的第二、三阶谐波失真（HD2/HD3）分别为-94/96 dB，这表明它在高频工作时仍能保持低失真性能，适合高质量音频和视频应用。 6. **AEC-Q100 Grade 1资格认证**：LMH6551Q符合汽车电子委员会（AEC）的Q100标准第一等级，适用于汽车电子环境，表明其可靠性经过严格测试。 7. **灵活性**：通过外部设置增益电阻，用户可以自由选择所需的增益，增强了设计的灵活性。 8. **应用广泛**：LMH6551Q可以应用于差分ADC驱动器、视频过双绞线传输、差分线路驱动器、单端转差分转换器、高速差分信号传输、中频/射频放大器以及表面声波滤波器缓冲/驱动器等领域。 9. **封装形式**：LMH6551Q采用8引脚VSSOP封装，便于在电路板上布局和焊接。 10. **连接图**：图1展示了器件的顶部视图和引脚连接方式，帮助用户了解如何正确使用该器件。 LMH6551Q是一款高性能、高速的差分运算放大器，具备出色的带宽、快速响应和低失真特性，尤其适用于需要高精度和高速信号处理的场合，如汽车电子、通信设备、视频传输和各种数据处理系统。同时，其灵活性和可靠性使得LMH6551Q成为工程师设计中的理想选择。

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LMH6551Q

www.ti.com

SNOSB95E –NOVEMBER 2011–REVISED MARCH 2013

LMH6551Q Differential, High Speed Op Amp

Check for Samples: LMH6551Q

FEATURES

DESCRIPTION

The LMH™6551Q is a high performance voltage

• 370 MHz −3 dB Bandwidth (V

OUT

= 0.5 V

)

feedback differential amplifier. The LMH6551Q has

• 50 MHz 0.1 dB Bandwidth

the high speed and low distortion necessary for

• 2400 V/µs Slew Rate

driving high performance ADCs as well as the current

handling capability to drive signals over balanced

• 18 ns Settling Time to 0.05%

transmission lines like CAT 5 data cables. The

• −94/−96 dB HD2/HD3 @ 5 MHz

LMH6551Q can handle a wide range of video and

• LMH6551Q is AEC-Q100 Grade 1 Qualified and

data formats.

is Manufactured on an Automotive Grade Flow

With external gain set resistors, the LMH6551Q can

be used at any desired gain. Gain flexibility coupled

APPLICATIONS

with high speed makes the LMH6551Q suitable for

• Differential AD Driver use as an IF amplifier in high performance

communications equipment.

• Video Over Twisted Pair

The LMH6551Q is available in the VSSOP package.

• Differential Line Driver

• Single End to Differential Converter

• High Speed Differential Signaling

• IF/RF Amplifier

• SAW Filter Buffer/Driver

• Automotive

Typical Application

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.

2LMH is a trademark of Texas Instruments.

3All other 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.

+OUT

-OUT

V+

V-

-IN

+IN

LMH6551Q

SNOSB95E –NOVEMBER 2011–REVISED MARCH 2013

www.ti.com

Connection Diagram

Figure 1. Top View

8-Pin VSSOP

See Package Number DGK

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

(1)(2)

ESD Tolerance

(3)

Human Body Model 2000V

Machine Model 200V

Supply Voltage 13.2V

Common Mode Input Voltage ±Vs

Maximum Input Current (pins 1, 2, 7, 8) 30mA

Maximum Output Current (pins 4, 5)

(4)

Maximum Junction Temperature 150°C

Soldering Information: http://www.ti.com/lit/SNOA549

(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 ensured. For ensured specifications, see the Electrical

Characteristics tables.

(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3) Human body model: 1.5 kΩ in series with 100 pF. Machine model: 0Ω in series with 200pF.

(4) The maximum output current (I

OUT

) is determined by device power dissipation limitations.

Operating Ratings

(1)

Operating Temperature Range −40°C to +125°C

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

Total Supply Voltage 3V to 11V

Package Thermal Resistance (θ

)

(2)

8-Pin VSSOP 159°C/W

(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 ensured. For ensured specifications, see the Electrical

Characteristics tables.

(2) The maximum power dissipation is a function of T

J(MAX)

, θ

and T

. The maximum allowable power dissipation at any ambient

temperature is P

= (T

J(MAX)

— T

)/ θ

. All numbers apply for package soldered directly into a 4 layer PC board with zero air flow.

Product Folder Links: LMH6551Q

LMH6551Q

www.ti.com

SNOSB95E –NOVEMBER 2011–REVISED MARCH 2013

±5V Electrical Characteristics

(1)

Single ended in differential out, T

= 25°C, G = +1, V

= ±5V, V

= 0V, R

= R

= 365Ω, R

= 500Ω; Unless specified

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(2)

Typ

(3)

Max

(2)

Units

AC Performance (Differential)

SSBW Small Signal −3 dB Bandwidth V

OUT

= 0.5 V

370 MHz

LSBW Large Signal −3 dB Bandwidth V

OUT

= 2 V

340 MHz

Large Signal −3 dB Bandwidth V

OUT

= 4 V

320 MHz

0.1 dB Bandwidth V

OUT

= 2 V

50 MHz

Slew Rate 4V Step

(4)

2400 V/μs

Rise/Fall Time 2V Step 1.8 ns

Settling Time 2V Step, 0.05% 18 ns

Pin AC Performance (Common Mode Feedback Amplifier)

Common Mode Small Signal V

bypass capacitor removed 200 MHz

Bandwidth

Distortion and Noise Response

HD2 V

= 2 V

, f = 5 MHz, R

=800Ω −94 dBc

HD2 V

= 2 V

, f = 20MHz, R

=800Ω −85 dBc

HD3 V

= 2 V

, f = 5 MHz, R

=800Ω −96 dBc

HD3 V

= 2 V

, f = 20 MHz, R

=800Ω −72 dBc

Input Referred Voltage Noise Freq ≥ 1 MHz 6.0 nV/√Hz

Input Referred Noise Current Freq ≥ 1 MHz 1.5 pA/√Hz

Input Characteristics (Differential)

OSD

Input Offset Voltage Differential Mode, V

= 0, V

= 0 0.5 ±4 mV

±6

Input Offset Voltage Average

(5)

−0.8 µV/°C

Temperature Drift

Input Bias Current

(6)

-4 0 µA

-10

Input Bias Current Average

(5)

−2.6 nA/°C

Temperature Drift

Input Bias Difference Difference in Bias currents between the 0.03 µA

two inputs

CMRR Common Mode Rejection Ratio DC, V

= 0V, V

= 0V 70 80 dBc

Input Resistance Differential 5 MΩ

Input Capacitance Differential 1 pF

CMVR Input Common Mode Voltage Range CMRR > 53dB +3.1 +3.2

−4.6 −4.7

(1) 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

= T

. No specification of parametric performance is indicated in the electrical tables under

conditions of internal self-heating where T

> T

(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical

Quality Control (SQC) methods.

(3) Typical numbers are the most likely parametric norm.

(4) Slew Rate is the average of the rising and falling edges.

(5) Drift determined by dividing the change in parameter at temperature extremes by the total temperature change.

(6) Negative input current implies current flowing out of the device.

Product Folder Links: LMH6551Q

LMH6551Q

SNOSB95E –NOVEMBER 2011–REVISED MARCH 2013

www.ti.com

±5V Electrical Characteristics

(1)

(continued)

Single ended in differential out, T

= 25°C, G = +1, V

= ±5V, V

= 0V, R

= R

= 365Ω, R

= 500Ω; Unless specified

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(2)

Typ

(3)

Max

(2)

Units

Pin Input Characteristics (Common Mode Feedback Amplifier)

OSC

Input Offset Voltage Common Mode, V

= 0 0.5 ±5 mV

±8

Input Offset Voltage Average

(7)

8.2 µV/°C

Temperature Drift

Input Bias Current

(8)

−2 μA

CMRR V

= 0V, 1V step on V

pin, measure 70 75 dB

Input Resistance 25 kΩ

Common Mode Gain ΔV

O,CM

/ΔV

0.995 0.999 1.005 V/V

Output Performance

Output Voltage Swing Single Ended, Peak to Peak ±7.38 ±7.8 V

±7.18

Output Common Mode Voltage Range V

= 0 V, ±3.69 ±3.8 V

OUT

Linear Output Current V

OUT

= 0V ±50 ±65 mA

Short Circuit Current Output Shorted to Ground 140 mA

= 3V Single Ended

(9)

Output Balance Error ΔV

OUT

Common Mode −70 dB

/ΔV

OUT

DIfferential, V

OUT

= 0.5 Vpp

Differential, f = 10 MHz

Miscellaneous Performance

VOL

Open Loop Gain Differential 70 dB

PSRR Power Supply Rejection Ratio DC, ΔV

= ±1V 71 90 dB

Supply Current R

= ∞ 11 12.5 14.5 mA

16.5

(7) Drift determined by dividing the change in parameter at temperature extremes by the total temperature change.

(8) Negative input current implies current flowing out of the device.

(9) The maximum output current (I

OUT

) is determined by device power dissipation limitations.

5V Electrical Characteristics

(1)

Single ended in differential out, T

= 25°C, G = +1, V

= 5V, V

= 2.5V, R

= R

= 365Ω, R

= 500Ω; Unless specified

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(2)

Typ

(3)

Max

(2)

Units

SSBW Small Signal −3 dB Bandwidth R

= 500Ω, V

OUT

= 0.5 V

350 MHz

LSBW Large Signal −3 dB Bandwidth R

= 500Ω, V

OUT

= 2 V

300 MHz

0.1 dB Bandwidth V

OUT

= 2 V

50 MHz

Slew Rate 4V Step

(4)

1800 V/μs

Rise/Fall Time, 10% to 90% 4V Step 2 ns

Settling Time 4V Step, 0.05% 17 ns

Pin AC Performance (Common Mode Feedback Amplifier)

Common Mode Small Signal 170 MHz

Bandwidth

(1) 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

= T

. No specification of parametric performance is indicated in the electrical tables under

conditions of internal self-heating where T

> T

(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical

Quality Control (SQC) methods.

(3) Typical numbers are the most likely parametric norm.

(4) Slew Rate is the average of the rising and falling edges.

Product Folder Links: LMH6551Q

LMH6551Q

www.ti.com

SNOSB95E –NOVEMBER 2011–REVISED MARCH 2013

5V Electrical Characteristics

(1)

(continued)

Single ended in differential out, T

= 25°C, G = +1, V

= 5V, V

= 2.5V, R

= R

= 365Ω, R

= 500Ω; Unless specified

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(2)

Typ

(3)

Max

(2)

Units

Distortion and Noise Response

HD2 2

Harmonic Distortion V

= 2 V

, f = 5 MHz, R

=800Ω −84 dBc

HD2 V

= 2 V

, f = 20 MHz, R

=800Ω −69 dBc

HD3 3

Harmonic Distortion V

= 2 V

, f = 5 MHz, R

=800Ω −93 dBc

HD3 V

= 2 V

, f = 20 MHz, R

=800Ω −67 dBc

Input Referred Noise Voltage Freq ≥ 1 MHz 6.0 nV/√Hz

Input Referred Noise Current Freq ≥ 1 MHz 1.5 pA/√Hz

Input Characteristics (Differential)

OSD

Input Offset Voltage Differential Mode, V

= 0, V

= 0 0.5 ±4 mV

±6

Input Offset Voltage Average

(5)

−0.8 µV/°C

Temperature Drift

BIAS

Input Bias Current

(6)

−4 0 μA

-10

Input Bias Current Average

(5)

−3 nA/°C

Temperature Drift

Input Bias Current Difference Difference in Bias currents between the 0.03 µA

two inputs

CMRR Common-Mode Rejection Ratio DC, V

= 0V 70 78 dBc

Input Resistance Differential 5 MΩ

Input Capacitance Differential 1 pF

ICM

Input Common Mode Range CMRR > 53 dB +3.1 +3.2

+0.4 +0.3

Pin Input Characteristics (Common Mode Feedback Amplifier)

Input Offset Voltage Common Mode, V

= 0 0.5 ±5 mV

±8

Input Offset Voltage Average 5.8 µV/°C

Temperature Drift

Input Bias Current 3 μA

CMRR V

= 0, 70 75 dB

1V step on V

pin, measure V

Input Resistance V

pin to ground 25 kΩ

Common Mode Gain ΔV

O,CM

/ΔV

0.995 0.999 1.005 V/V

Output Performance

OUT

Output Voltage Swing Single Ended, Peak to Peak, V

= ±2.5V, ±2.4 ±2.8 V

= 0V

OUT

Linear Output Current V

OUT

= 0V Differential ±45 ±60 mA

Output Short Circuit Current Output Shorted to Ground 230 mA

= 3V Single Ended

(7)

CMVR Output Common Mode Voltage V

= 0, V

pin = 1.2V and 3.8V 1.23 1.20

Range 3.72 3.80

Output Balance Error ΔV

OUT

Common Mode /ΔV

OUT

DIfferential, −65 dB

OUT

= 1Vpp Differential, f = 10 MHz

Miscellaneous Performance

Open Loop Gain DC, Differential 70 dB

PSRR Power Supply Rejection Ratio DC, ΔV

= ±0.5V 71 88 dB

Supply Current R

= ∞ 10 11.5 13.5 mA

15.5

(5) Drift determined by dividing the change in parameter at temperature extremes by the total temperature change.

(6) Negative input current implies current flowing out of the device.

(7) The maximum output current (I

OUT

) is determined by device power dissipation limitations.

Product Folder Links: LMH6551Q

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