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부품번호 | KM4121 기능 |
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기능 | 0.2mA/ Low Cost/ +2.7V & +5V/ 35MHz Rail-to-Rail Amplifiers | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 10 페이지수
www.fairchildsemi.com
KM4111/KM4121
0.2mA, Low Cost, +2.7V & +5V, 35MHz Rail-to-Rail Amplifiers
Features
I 208µA supply current
I 35MHz bandwidth
I Power down to Is = 35µA (KM4121)
I Fully specified at +2.7V and +5V supplies
I Output voltage range: 0.08V to 4.88V; Vs = +5
I Input voltage range: -0.3V to +3.8V; Vs = +5
I 27V/µs slew rate
I ±8.5mA linear output current
I ±13mA short circuit output current
I 21nV/√Hz input voltage noise
I Directly replaces MAX4281
I Small package options (SOT23-5 and SOT23-6)
Applications
I Portable/battery-powered applications
I A/D buffer
I Active filters
I Signal conditioning
I Portable test instruments
KM4111/KM4121 Packages
SOT23-5 (KM4111)
Out 1
5 +Vs
-Vs 2
+In 3
-
4 -In
General Description
The KM4111 (single) and KM4121 (single with disable)
are ultra-low power, low cost, voltage feedback
amplifiers. These amplifiers use only 208µA of supply
current and are designed to operate on +2.7V, +5V,
or ±2.5V supplies. The input voltage range extends
300mV below the negative rail and 1.2V below the
positive rail.
The KM4111 offers high bipolar performance at a
low CMOS price. The KM4111 offers superior dynamic
performance with a 35MHz small signal bandwidth
and 27V/µs slew rate. The combination of lowpower,
high bandwidth, and rail-to-rail performance make
the KM4111 well suited for battery-powered commu-
nication/computing systems.
Non-Inverting Freq. Response Vs = +5V
G=2
0.1 1 10 100
Frequency (MHz)
SOT23-6 (KM4121)
Out 1
6 +Vs
-Vs 2
+In 3
5 DIS
-
4 -In
REV. 1B June 2001
DATA SHEET
KM4111/KM4121
KM4111/KM4121 Performance Characteristics (Vs = +5V, G = 2, RL = 2kΩ to Vs/2, Rf = 2.5kΩ; unless noted)
Non-Inverting Frequency Response Vs = +5V
G=2
G=1
Rf = 0
Inverting Frequency Response Vs = +5V
G = -1
G = -2
G = 10
G=5
0.1 1 10 100
Frequency (MHz)
Non-Inverting Freq. Response Vs = +2.7V
G=2
G=1
Rf = 0
G = 10
G=5
0.1 1 10 100
Frequency (MHz)
Large Signal Frequency Response
Vo = 2Vpp
Vo = 1Vpp
0.1 1
10
Frequency (MHz)
Input Voltage Noise
100
80
60
40
20
0
100
1k 10k 100k
Frequency (Hz)
100
1M
G = -10
G = -5
0.1 1 10 100
Frequency (MHz)
Inverting Frequency Response Vs = +2.7V
G = -10
G = -1
G = -2
G = -5
0.1 1 10 100
Frequency (MHz)
Open Loop Gain & Phase vs. Frequency
100 40
|Gain|
80
0
60 -40
40 -80
20 -120
0 -160
Phase
-20
-200
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
2nd & 3rd Harmonic Distortion; Vs = +5V
-40
Vo = 2Vpp
-50
3rd
-60
-70
-80 2nd
-90
-100
10
100
Frequency (kHz)
1000
4 REV. 1B June 2001
4페이지 KM4111/KM4121
DATA SHEET
+
-
Rg
Rf
Rs
CL RL
Figure 4: Typical Topology for driving
a capacitive load
Layout Considerations
General layout and supply bypassing play major
roles in high frequency performance. Fairchild has
evaluation boards to use as a guide for high frequency
layout and to aid in device testing and characterization.
Follow the steps below as a basis for high frequency
layout:
I Include 6.8µF and 0.01µF ceramic capacitors
I Place the 6.8µF capacitor within 0.75 inches
of the power pin
I Place the 0.01µF capacitor within 0.1 inches
of the power pin
I Remove the ground plane under and around the
part, especially near the input and output pins to
reduce parasitic capacitance
I Minimize all trace lengths to reduce
series inductances
Refer to the evaluation board layouts shown in Figure 6
for more information.
Evaluation Board Information
The following evaluation boards are available to aid
in the testing and layout of this device:
Evaluation board schematics and layouts are shown in
Figure 5 and Figure 6.
The KEB002 evaluation board is built for dual supply
operation. Follow these steps to use the board in a
single supply application:
1. Short -Vs to ground
2. Use C3 and C4, if the -Vs pin of the KM4111
or KM4121 is not directly connected to the
ground plane.
Figure 5: Evaluation Board Schematic
Eval Board
KEB002
Description
Products
Single Channel,
KM4111IT5,
Dual Supply 5 & 6 lead SOT23 KM4121IT6
REV. 1B June 2001
7
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다운로드 | [ KM4121.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
KM4120 | 0.5mA/ Low Cost/ +2.7V & +5V/ 75MHz Rail-to-Rail Amplifiers | Fairchild Semiconductor |
KM4121 | 0.2mA/ Low Cost/ +2.7V & +5V/ 35MHz Rail-to-Rail Amplifiers | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |