lm7121imx National Semiconductor Corporation, lm7121imx Datasheet

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lm7121imx

Manufacturer Part Number
lm7121imx
Description
235 Mhz Tiny Low Power Voltage Feedback Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet

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LM7121IMX
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© 1999 National Semiconductor Corporation
8-Pin SO-8
5-Pin SOT23-5
LM7121
235 MHz Tiny Low Power Voltage Feedback Amplifier
General Description
The LM7121 is a high performance operational amplifier
which addresses the increasing AC performance needs of
video and imaging applications, and the size and power con-
straints of portable applications.
The LM7121 can operate over a wide dynamic range of sup-
ply voltages, from 5V (single supply) up to
plication Information section for more details). It offers an ex-
cellent speed-power product delivering 1300V/µs and 235
MHz Bandwidth (−3 dB, A
operational amplifier is stability while driving unlimited ca-
pacitive loads.
Due to its Tiny SOT23-5 package, the LM7121 is ideal for
designs where space and weight are the critical parameters.
The benefits of the Tiny package are evident in small por-
table electronic devices, such as cameras, and PC video
cards. Tiny amplifiers are so small that they can be placed
anywhere on a board close to the signal source or near the
input to an A/D converter.
Connection Diagrams
Ordering Information
Package
8-Pin SO-8
Top View
V
LM7121IM
LM7121IMX
LM7121IM5
LM7121IM5X
= +1). Another key feature of this
Ordering Information
DS012348
±
DS012348-2
15V (see the Ap-
NSC Drawing
Number
MA05A
MA05A
Features
(Typical unless otherwise noted) V
n Easy to use voltage feedback topology
n Stable with unlimited capacitive loads
n Tiny SOT23-5 package — typical circuit layout takes half
n Unity gain frequency:
n Bandwidth (−3 dB, A
n Slew rate: 1300V/µs
n Supply Voltages SO-8: 5V to
n Characterized for: +5V,
n Low supply current: 5.3 mA
Applications
n Scanners, color fax, digital copiers
n PC video cards
n Cable drivers
n Digital cameras
n ADC/DAC buffers
n Set-top boxes
M08A
M08A
the space of SO-8 designs
SOT23-5: 5V to
LM7121IM
LM7121IM
Package
Marking
A03A
A03A
±
5-Pin SOT23
5V
V
Top View
= +1, R
175 MHz
±
5V,
L
±
±
S
= 100 ): 235 MHz
15V
15V
=
2.5k Tape and Reel
1k Tape and Reel
3k Tape and Reel
±
Supplied As
15V
DS012348-1
Rails
www.national.com
August 1999

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lm7121imx Summary of contents

Page 1

... A/D converter. Connection Diagrams 8-Pin SO-8 Top View Ordering Information Package Ordering Information 8-Pin SO-8 LM7121IM LM7121IMX 5-Pin SOT23-5 LM7121IM5 LM7121IM5X © 1999 National Semiconductor Corporation DS012348 Features (Typical unless otherwise noted Easy to use voltage feedback topology n Stable with unlimited capacitive loads n Tiny SOT23-5 package — ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Differential Input Voltage (Note 7) Voltage at Input/Output Pin (V + − Supply Voltage (V ...

Page 3

DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter I Supply Current S ± 15V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T face ...

Page 4

DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T face limits apply at the temperature extremes. Symbol Parameter C Input Capacitance IN CMRR Common Mode Rejection Ratio +PSRR Positive Power Supply Rejection Ratio −PSRR Negative Power ...

Page 5

AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T face limits apply at the temperature extremes. Symbol Parameter Differential Phase D e Input-Referred n Voltage Noise i Input-Referred n Current Noise T.H.D. Total Harmonic Distortion +5V ...

Page 6

AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T face limits apply at the temperature extremes. Symbol Parameter SR Slew Rate (Note 8) GBW Unity Gain-Bandwidth Phase Margin m f (−3 dB) Bandwidth (Notes 9, 10) t ...

Page 7

Typical Performance Characteristics Input Bias Current vs Temperature DS012348-69 Short Circuit Current vs Temperature (Sourcing) DS012348-78 Output Voltage vs Output ± = Current ( 15V) SOURCE S DS012348-71 = 25˚ unless otherwise specified ...

Page 8

Typical Performance Characteristics Output Voltage vs Output = +5V) Current ( SOURCE S DS012348-74 PSRR vs Frequency DS012348-4 Open Loop Frequency Response DS012348-89 www.national.com = 25˚ unless otherwise specified (Continued ...

Page 9

Typical Performance Characteristics GBWP @ 10 MHz vs Supply Voltage DS012348-25 Input Voltage Noise vs Frequency DS012348-27 Input Current Noise vs Frequency DS012348-30 = 25˚ unless otherwise specified (Continued Large Signal Voltage ...

Page 10

Typical Performance Characteristics Slew Rate vs Input Voltage DS012348-33 Large Signal Pulse Response, = − ± DS012348-36 Large Signal Pulse Response ± DS012348-39 www.national.com = 25˚C, ...

Page 11

Typical Performance Characteristics Large Signal Pulse Response, ± DS012348-42 Small Signal Pulse Response, ± = − 5V 100 R L DS012348-45 Small Signal Pulse Response, = ...

Page 12

Typical Performance Characteristics Small Signal Pulse Response, ± 100 R L DS012348-51 Closed Loop Frequency Response vs Temperature = ± 100 V 5V ...

Page 13

Typical Performance Characteristics Closed Loop Frequency Response vs Capacitive = + ± Load (A 5V DS012348-62 Total Harmonic Distortion vs Frequency DS012348-80 Total Harmonic Distortion vs Frequency DS012348-82 = 25˚ unless ...

Page 14

Typical Performance Characteristics Undistorted Output Swing vs Frequency Application Information The table below, depicts the maximum operating supply volt- age for each package type: TABLE 1. Maximum Supply Voltage Values SOT23-5 Single Supply 10V ± Dual Supplies 5V Stable unity ...

Page 15

Application Information (Continued) FIGURE 3. Waveform across a 100 It is very important to keep the lead lengths to a minimum and to provide a low impedance current path by using a ground-plane on the board. Caution ...

Page 16

Application Information Note: Pin numbers shown are for SO-8 package. * Input termination of NTSC monitor. FIGURE 4. Single Supply Differential Twister Pair Cable Transmitter/Receiver Differential Gain and Differential Phase errors measured at the load are less than 1% and ...

Page 17

Application Information (Continued) FIGURE 5. Step Response DS012348-98 = −1 ( DS012348-A0 = +2, Capacitive Load ( DS012348- +5V, Single Supply Operation ( DS012348-95 Input ...

Page 18

... Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150" Wide) Small Outline Package, JEDEC www.national.com Order Number LM7121IM or LM7121IMX NS Package Number M08A 18 ...

Page 19

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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