National Semiconductor LM7171 Technical data

LM7171
Very High Speed, High Output Current, Voltage
Feedback Amplifier

LM7171 Very High Speed, High Output Current, Voltage Feedback Amplifier

May 2006

General Description

The LM7171 is a high speed voltage feedback amplifier that
has the slewing characteristic of a current feedback ampli­fier; yet it can be used in all traditional voltage feedback
amplifier configurations. The LM7171 is stable for gains as
low as +2 or −1. It provides a very high slew rate at 4100V/µs
and a wide unity-gain bandwidth of 200 MHz while consum­ing only 6.5 mA of supply current. It is ideal for video and
high speed signal processing applications such as HDSL
and pulse amplifiers. With 100 mA output current, the
LM7171 can be used for video distribution, as a transformer
driver or as a laser diode driver.

±

Operation on
swings and provides greater dynamic range and signal-to­noise ratio. The LM7171 offers low SFDR and THD, ideal for
ADC/DAC systems. In addition, the LM7171 is specified for

±

5V operation for portable applications.

The LM7171 is built on National’s advanced VIP
cally integrated PNP) complementary bipolar process.

15V power supplies allows for large signal

™

III (Verti-

Typical Performance

Large Signal Pulse Response

= +2, VS=±15V

A

V

Features

(Typical Unless Otherwise Noted)

n Easy-to-use voltage feedback topology
n Very high slew rate: 4100 V/µs
n Wide unity-gain bandwidth: 200 MHz
n −3 dB frequency
n Low supply current: 6.5 mA
n High open loop gain: 85 dB
n High output current: 100 mA
n Differential gain and phase: 0.01%, 0.02˚
n Specified for

@

AV= +2: 220 MHz

±

15V and±5V operation

Applications

n HDSL and ADSL drivers
n Multimedia broadcast systems
n Professional video cameras
n Video amplifiers
n Copiers/scanners/fax
n HDTV amplifiers
n Pulse amplifiers and peak detectors
n CATV/fiber optics signal processing

01238501

VIP™is a trademark of National Semiconductor Corporation.

© 2006 National Semiconductor Corporation DS012385 www.national.com

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

LM7171

please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Maximum Junction Temperature
(Note 4) 150˚C

Operating Ratings (Note 1)

ESD Tolerance (Note 2) 2.5 kV

+–V−

Supply Voltage (V

Differential Input Voltage (Note 11)

) 36V

±

10V

Output Short Circuit to Ground

(Note 3) Continuous

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

Supply Voltage 5.5V ≤ V

Junction Temperature Range

LM7171AI, LM7171BI −40˚C ≤ T

Thermal Resistance (θ

)

JA

8-Pin MDIP 108˚C/W

8-Pin SOIC 172˚C/W

±

15V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, V+= +15V, V−= −15V, VCM= 0V, and RL=1kΩ. Boldface
limits apply at the temperature extremes

Symbol Parameter Conditions Typ

(Note 5)

LM7171AI LM7171BI Units

Limit Limit

(Note 6) (Note 6)

V

OS

Input Offset Voltage 0.2 1 3 mV

47max

TC V

OS

Input Offset Voltage 35 µV/˚C

Average Drift

I

B

Input Bias Current 2.7 10 10 µA

12 12 max

I

OS

Input Offset Current 0.1 4 4 µA

66max

R

IN

Input Resistance Common Mode 40 MΩ

Differential Mode 3.3

R

O

Open Loop Output 15 Ω

Resistance

CMRR Common Mode V

=±10V 105 85 75 dB

CM

Rejection Ratio 80 70 min

PSRR Power Supply V

=±15V to±5V 90 85 75 dB

S

Rejection Ratio 80 70 min

V

CM

Input Common-Mode CMRR>60 dB

±

13.35 V

Voltage Range

A

V

Large Signal Voltage RL=1kΩ 85 80 75 dB

Gain (Note 7) 75 70 min

R

= 100Ω 81 75 70 dB

L

70 66 min

V

O

Output Swing RL=1kΩ 13.3 13 13 V

12.7 12.7 min

−13.2 −13 −13 V

−12.7 −12.7 max

R

= 100Ω 11.8 10.5 10.5 V

L

9.5 9.5 min

−10.5 −9.5 −9.5 V

−9 −9 max

Output Current Sourcing, R

= 100Ω 118 105 105 mA

L

(Open Loop) 95 95 min

(Note 8) Sinking, R

= 100Ω 105 95 95 mA

L

90 90 max

≤ 36V

S

≤ +85˚C

J

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±

15V DC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, V+= +15V, V−= −15V, VCM= 0V, and RL=1kΩ. Boldface
limits apply at the temperature extremes

Symbol Parameter Conditions Typ

(Note 5)

LM7171AI LM7171BI Units

Limit Limit

(Note 6) (Note 6)

Output Current Sourcing, R

(in Linear Region) Sinking, R

I

SC

Output Short Circuit Sourcing 140 mA

= 100Ω 100 mA

L

= 100Ω 100

L

Current Sinking 135

I

S

Supply Current 6.5 8.5 8.5 mA

9.5 9.5 max

±

15V AC Electrical Characteristics

Unless otherwise specified, TJ= 25˚C, V+= +15V, V−= −15V, VCM= 0V, and RL=1kΩ.

Typ LM7171AI LM7171BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

SR Slew Rate (Note 9) A

= +2, VIN=13V

V

A

= +2, VIN=10V

V

PP

PP

4100 V/µs

3100

Unity-Gain Bandwidth 200 MHz

−3 dB Frequency A

φ

m

t

s

t

p

A

D

φ

D

Phase Margin 50 Deg

Settling Time (0.1%) AV= −1, VO=±5V 42 ns

Propagation Delay AV= −2, VIN=±5V, 5 ns

Differential Gain (Note 10) 0.01 %

Differential Phase (Note 10) 0.02 Deg

Second Harmonic (Note 12) f

Third Harmonic (Note 12) f

e

n

Input-Referred f = 10 kHz

= +2 220 MHz

V

R

= 500Ω

L

R

= 500Ω

L

= 10 kHz −110 dBc

IN

f

= 5 MHz −75 dBc

IN

= 10 kHz −115 dBc

IN

f

= 5 MHz −55 dBc

IN

14

Voltage Noise

i

n

Input-Referred f = 10 kHz

1.5

Current Noise

LM7171

±

5V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, V+= +5V, V−= −5V, VCM= 0V, and RL=1kΩ. Boldface limits
apply at the temperature extremes

Typ LM7171AI LM7171BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

V

OS

Input Offset Voltage 0.3 1.5 3.5 mV

47max

TC V

OS

Input Offset Voltage 35 µV/˚C

Average Drift

I

B

Input Bias Current 3.3 10 10 µA

12 12 max

I

OS

Input Offset Current 0.1 4 4 µA

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±

5V DC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, V+= +5V, V−= −5V, VCM= 0V, and RL=1kΩ. Boldface limits

LM7171

apply at the temperature extremes

Typ LM7171AI LM7171BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

66max

R

IN

Input Resistance Common Mode 40 MΩ

Differential Mode 3.3

R

O

CMRR Common Mode V

Output Resistance 15 Ω

=±2.5V 104 80 70 dB

CM

Rejection Ratio 75 65 min

PSRR Power Supply V

=±15V to±5V 90 85 75 dB

S

Rejection Ratio 80 70 min

V

CM

Input Common-Mode CMRR>60 dB

±

3.2 V

Voltage Range

A

V

Large Signal Voltage RL=1kΩ 78 75 70 dB

Gain (Note 7) 70 65 min

R

= 100Ω 76 72 68 dB

L

67 63 min

V

O

Output Swing RL=1kΩ 3.4 3.2 3.2 V

33min

−3.4 −3.2 −3.2 V

−3 −3 max

R

= 100Ω 3.1 2.9 2.9 V

L

2.8 2.8 min

−3.0 −2.9 −2.9 V

−2.8 −2.8 max

Output Current Sourcing, R

= 100Ω 31 29 29 mA

L

(Open Loop) (Note 8) 28 28 min

Sinking, R

= 100Ω 30 29 29 mA

L

28 28 max

I

SC

Output Short Circuit Sourcing 135 mA

Current Sinking 100

I

S

Supply Current 6.2 8 8 mA

99max

±

5V AC Electrical Characteristics

Unless otherwise specified, TJ= 25˚C, V+= +5V, V−= −5V, VCM= 0V, and RL=1kΩ.

Typ LM7171AI LM7171BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

SR Slew Rate (Note 9) A

= +2, VIN= 3.5 V

V

PP

950 V/µs

Unity-Gain Bandwidth 125 MHz

−3 dB Frequency A

φ

m

t

s

t

p

A

D

φ

D

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Phase Margin 57 Deg

Settling Time (0.1%) AV= −1, VO=±1V, 56 ns

Propagation Delay AV= −2, VIN=±1V, 6 ns

Differential Gain (Note 1) 0.02 %

Differential Phase (Note 10) 0.03 Deg

= +2 140 MHz

V

R

= 500Ω

L

R

= 500Ω

L

±

5V AC Electrical Characteristics (Continued)

Unless otherwise specified, TJ= 25˚C, V+= +5V, V−= −5V, VCM= 0V, and RL=1kΩ.

Typ LM7171AI LM7171BI

Symbol Parameter Conditions (Note 5) Limit Limit Units

(Note 6) (Note 6)

Second Harmonic (Note 12) f

Third Harmonic (Note 12) f

e

n

Input-Referred f = 10 kHz 14

= 10 kHz −102 dBc

IN

f

= 5 MHz −70 dBc

IN

= 10 kHz −110 dBc

IN

f

= 5 MHz −51 dBc

IN

Voltage Noise

i

n

Input-Referred f = 10 kHz

1.8

Current Noise

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 and the test conditions, see the Electrical Characteristics.

Note 2: Human body model, 1.5 kΩ in series with 100 pF.

Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the

maximum allowed junction temperature of 150˚C.

Note 4: The maximum power dissipation is a function of T
(T

Note 5: Typical values represent the most likely parametric norm.

Note 6: All limits are guaranteed by testing or statistical analysis.

Note 7: Large signal voltage gain is the total output swing divided by the input signal required to produce that swing. For V

V

OUT

Note 8: The open loop output current is guaranteed, by the measurement of the open loop output voltage swing, using 100Ω output load.

Note 9: Slew Rate is the average of the raising and falling slew rates.

Note 10: Differential gain and phase are measured with A

Note 11: Input differential voltage is applied at V

Note 12: Harmonics are measured with V

Note 13: The THD measurement at low frequency is limited by the test instrument.

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

J(MAX)–TA

=±1V.

=±15V.

S

=1VPP,AV= +2 and RL= 100Ω.

IN

, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD=

J(MAX)

=±15V, V

S

= +2, VIN=1VPPat 3.58 MHz and both input and output 75Ω terminated.

V

=±5V. For VS=±5V,

OUT

LM7171

Connection Diagram

8-Pin DIP/SO

Top View

01238502

Ordering Information

Package Temperature Range Transport

Industrial Military

−40˚C to +85˚C −55˚C to +125˚C

LM7171AIM Rails

8-Pin SOIC

8-Pin MDIP

LM7171AIMX Tape and Reel

LM7171BIM Rails

LM7171BIMX Tape and Reel

LM7171AIN Rails

LM7171BIN Rails

Media

NSC

Drawing

M08A

N08E

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Typical Performance Characteristics unless otherwise noted, T

LM7171

Supply Current vs. Supply Voltage Supply Current vs. Temperature

01238563 01238564

Input Offset Voltage vs. Temperature Input Bias Current vs. Temperature

= 25˚C

A

01238565

01238566

Short Circuit Current vs. Temperature (Sourcing) Short Circuit Current vs. Temperature (Sinking)

01238567

01238568

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