Feedback Amplifier. LM7121 Datasheet

LM7121 Amplifier. Datasheet pdf. Equivalent

LM7121 Datasheet
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Part LM7121
Description 235-MHz Tiny Low Power Voltage Feedback Amplifier
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LM7121
SNOS750A – AUGUST 1999 – REVISED OCTOBER 2014
LM7121 235-MHz Tiny Low Power Voltage Feedback Amplifier
1 Features
1 (Typical Unless Otherwise Noted). VS = ±15 V
• Easy to use Voltage Feedback Topology
• Stable with Unlimited Capacitive Loads
• Tiny SOT23-5 Package — Typical Circuit Layout
Takes Half the Space Of SO-8 Designs
• Unity Gain Frequency: 175 MHz
• Bandwidth (3 dB, AV = +1, RL = 100Ω): 235 MHz
• Slew Rate: 1300V/μs
• Supply Voltages:
– SO-8: 5 V to ±15 V
– SOT23-5: 5 V to ±5 V
• Characterized for: +5 V, ±5 V, ±15 V
• Low Supply Current: 5.3 mA
2 Applications
• Scanners, Color Fax, Digital Copiers
• PC Video Cards
• Cable Drivers
• Digital Cameras
• ADC/DAC Buffers
• Set-top Boxes
3 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 constraints of
portable applications.
The LM7121 can operate over a wide dynamic range
of supply voltages, from 5 V (single supply) up to
±15V (see Application and Implementation for more
details). It offers an excellent speed-power product
delivering 1300 V/μs and 235 MHz Bandwidth (3 dB,
AV = +1). Another key feature of this operational
amplifier is stability while driving unlimited capacitive
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 portable 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.
PART NUMBER
LM7121
Device Information(1)
PACKAGE
BODY SIZE (NOM)
SOT-23 (5)
2.921 mm × 1.651 mm
SOIC (8)
4.902 mm × 3.912 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Circuit for AV = +1 Operation
(VS= 6 V)
Unity Gain Frequency vs. Supply Voltage
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



etcTI LM7121
LM7121
SNOS750A – AUGUST 1999 – REVISED OCTOBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 Handling Ratings....................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 ±15V DC Electrical Characteristics ........................... 5
6.6 ±15V AC Electrical Characteristics ........................... 6
6.7 ±5V DC Electrical Characteristics ............................. 6
6.8 ±5V AC Electrical Characteristics ............................. 7
6.9 +5V DC Electrical Characteristics ............................. 8
6.10 +5V AC Electrical Characteristics ........................... 8
6.11 Typical Characteristics ............................................ 9
7 Application and Implementation ........................ 21
7.1 Application Information............................................ 21
7.2 Typical Applications ................................................ 22
8 Device and Documentation Support.................. 26
8.1 Trademarks ............................................................. 26
8.2 Electrostatic Discharge Caution .............................. 26
8.3 Glossary .................................................................. 26
9 Mechanical, Packaging, and Orderable
Information ........................................................... 26
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (August 1999) to Revision A
Page
• Added, updated, or renamed the following sections: Device Information Table, Pin Configuration and Functions,
Application and Implementation; Power Supply Recommendations ; Layout; Device and Documentation Support;
Mechanical, Packaging, and Ordering Information................................................................................................................. 1
• Deleted TJ = 25°C from Electrical Characteristics tables ....................................................................................................... 5
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Copyright © 1999–2014, Texas Instruments Incorporated



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5 Pin Configuration and Functions
Package DBV
5-Pin
Top View
LM7121
SNOS750A – AUGUST 1999 – REVISED OCTOBER 2014
Package D0008A
8-Pin
Top View
NAME
-IN
+IN
N/C
OUTPUT
V-
V+
PIN
NUMBER
DBV
D0008A
42
33
–– 5, 8
16
24
57
Pin Functions
I/O DESCRIPTION
I Inverting input
I Non-inverting input
–– No connection
O Output
I Negative supply
I Positive supply
Copyright © 1999–2014, Texas Instruments Incorporated
Product Folder Links: LM7121
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