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PDF LM7121IMX Data sheet ( Hoja de datos )
| Número de pieza | LM7121IMX | |
| Descripción | 235 MHz Tiny Low Power Voltage Feedback Amplifier | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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August 1999
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 ±15V (see the Ap-
plication Information section for more details). It offers an ex-
cellent speed-power product delivering 1300V/µs and 235
MHz Bandwidth (−3 dB, AV = +1). Another key feature of this
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.
Features
(Typical unless otherwise noted) VS = ±15V
n Easy to use voltage feedback topology
n Stable with unlimited capacitive loads
n Tiny SOT23-5 package — typical circuit layout takes half
the space of SO-8 designs
n Unity gain frequency: 175 MHz
n Bandwidth (−3 dB, AV = +1, RL = 100Ω): 235 MHz
n Slew rate: 1300V/µs
n Supply Voltages SO-8: 5V to ±15V
SOT23-5: 5V to ±5V
n Characterized for: +5V, ±5V, ±15V
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
Connection Diagrams
8-Pin SO-8
5-Pin SOT23
Top View
DS012348-2
Ordering Information
Package
Ordering Information
8-Pin SO-8
5-Pin SOT23-5
LM7121IM
LM7121IMX
LM7121IM5
LM7121IM5X
Top View
DS012348-1
NSC Drawing
Number
M08A
M08A
MA05A
MA05A
Package
Marking
LM7121IM
LM7121IM
A03A
A03A
Supplied As
Rails
2.5k Tape and Reel
1k Tape and Reel
3k Tape and Reel
© 1999 National Semiconductor Corporation DS012348
www.national.com
1 page  
±5V AC Electrical Characteristics (Continued)
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = 5V, V− = −5V, VCM = VO = 0V and RL > 1 MΩ. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
φD Differential Phase
en Input-Referred
Voltage Noise
in Input-Referred
Current Noise
Conditions
AV = +2, RL = 150Ω
f = 10 kHz
f = 10 kHz
Typ
(Note 5)
0.65
17
2
LM7121I
Limit
(Note 6)
Units
Deg
T.H.D.
Total Harmonic Distortion
2 VPP Output, RL = 150Ω,
AV = +2, f = 1 MHz
2 VPP Output, RL = 150Ω,
AV = +2, f = 5 MHz
0.1
0.6
%
+5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TJ = 25˚C, V+ = +5V, V− = 0V, VCM = VO = V+/2 and RL > 1 MΩ. Bold-
face limits apply at the temperature extremes.
Symbol
Parameter
VOS
IB
IOS
RIN
CIN
CMRR
+PSRR
−PSRR
VCM
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Resistance
Input Capacitance
Common Mode
Rejection Ratio
Positive Power Supply
Rejection Ratio
Negative Power Supply
Rejection Ratio
Input Common-Mode
Voltage Range
AV Large Signal
Voltage Gain
VO Output Swing
ISC Output Short Circuit
Current
IS Supply Current
Conditions
Common Mode
Differential Mode
Common Mode
2V ≤ VCM ≤ 3V
4.6V ≤ V+ ≤ 5V
0V ≤ V− ≤ 0.4V
CMRR ≥ 45 dB
RL = 2 kΩ to V+/2
RL = 2 kΩ to V+/2, High
RL = 2 kΩ to V+/2, Low
RL = 150Ω to V+/2, High
RL = 150Ω to V+/2, Low
Sourcing
Sinking
Typ
(Note 5)
2.4
4
0.04
2.6
3.4
2.3
65
85
61
3.5
1.5
64
3.7
1.3
3.48
1.59
33
20
4.8
LM7121I
Limit
(Note 6)
Units
mV
µA
µA
MΩ
MΩ
pF
dB
dB
dB
V
min
V
max
dB
V
mA
mA
mA
5 www.national.com
5 Page 
Typical Performance Characteristics TA= 25˚C, RL = 1 MΩ. unless otherwise specified (Continued)
Large Signal Pulse Response,
AV = +2, VS = ± 5V
Large Signal Pulse Response,
AV = +2, VS = +5V
Small Signal Pulse Response,
AV = −1, VS = ±15V, RL = 100Ω
DS012348-42
Small Signal Pulse Response,
AV = −1, VS = ±5V,
RL = 100Ω
DS012348-43
Small Signal Pulse Response,
AV = −1, VS = +5V,
RL = 100Ω
DS012348-44
Small Signal Pulse Response,
AV = +1, VS = ±15V,
RL = 100Ω
DS012348-45
Small Signal Pulse Response,
AV = +1, VS = ±5V,
RL = 100Ω
DS012348-46
Small Signal Pulse Response,
AV = +1, VS = +5V,
RL = 100Ω
DS012348-47
Small Signal Pulse Response,
AV = +2, VS = ±15V,
RL = 100Ω
DS012348-48
DS012348-49
DS012348-50
11 www.national.com
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet LM7121IMX.PDF ] | |
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