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부품번호 | KM4112 기능 |
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기능 | 70A/ Low Cost/ +2.7V & +5V/ 7.3MHz Rail-to-Rail Amplifier | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 9 페이지수
www.fairchildsemi.com
KM4112
70µA, Low Cost, +2.7V & +5V, 7.3MHz Rail-to-Rail Amplifier
Features
I 70µA supply current
I 7.3MHz bandwidth
I Fully specified at +2.7V and +5V supplies
I Output voltage range: 0.04V to 4.96V; Vs = +5
I Input voltage range: -0.3V to +3.8V; Vs = +5
I 9V/µs slew rate
I ±4mA linear output current
I ±9mA short circuit output current
I 29nV/√Hz input voltage noise
I Competes with low power CMOS amps
I Small package option (SOT23-5)
Applications
I Portable/battery-powered applications
I A/D buffer
I Active filters
I Signal conditioning
I Portable test instruments
KM4112 Package
SOT23-5
Out 1
5 +Vs
General Description
The KM4112 is an ultra-low power, low cost, voltage
feedback amplifier. The KM4112 uses only 70µA of
supply current and is 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 KM4112 offers high bipolar performance at a low
CMOS price. The KM4112 offers superior dynamic
performance with a 7.3MHz small signal bandwidth
and 9V/µs slew rate. The combination of low power,
high bandwidth, and rail-to-rail performance make
the KM4112 well suited for battery-powered commu-
nication/computing systems.
Non-Inverting Freq. Response Vs = +5V
G=2
Rf = 10kΩ
-Vs 2
+In 3
-
4 -In
0.01 0.1
1
Frequency (MHz)
10
REV. 2 July 2001
DATA SHEET
KM4112
KM4112 Performance Characteristics (Vs = +5V, G = 2, RL = 10kΩ to Vs/2, Rf = 10kΩ; unless noted)
Non-Inverting Frequency Response Vs = +5V
G=2
G=1
Inverting Frequency Response Vs = +5V
G = -2
G = 10
G=5
0.01 0.1
1
Frequency (MHz)
10
Non-Inverting Freq. Response Vs = +2.7V
G=2
G=1
G = 10
G=5
0.01 0.1
1
Frequency (MHz)
10
Large Signal Frequency Response
Vo = 1Vpp
Vo = 2Vpp
0.01 0.1
1
Frequency (MHz)
Input Voltage Noise
140
120
100
80
60
40
20
0
0.0001
0.001 0.01
0.1
1.0
Frequency (MHz)
10
10
G = -10
G = -5
G = -1
0.01 0.1
1
Frequency (MHz)
10
Inverting Frequency Response Vs = +2.7V
G = -1
G = -2
G = -10
G = -5
0.01 0.1
1
Frequency (MHz)
10
Open Loop Gain & Phase vs. Frequency
80 0
|Gain|
70
-20
60 -40
50 -60
40 -80
30 -100
20 -120
10 -140
0
Phase
-10
1 10
-160
-180
100 1k 10k 100k 1M
Frequency (Hz)
2nd & 3rd Harmonic Distortion; Vs = +5V
-20
Vo = 2Vpp
-30
-40 3rd
-50
-60
-70 2nd
-80
-90
10
100
Frequency (kHz)
1000
4 REV. 2 July 2001
4페이지 KM4112
DATA SHEET
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:
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 KM4112 is not
directly connected to the ground plane.
Eval Board
KEB002
Description
Products
Single Channel,
KM4112IT5
Dual Supply 5 & 6 lead SOT23
Evaluation board schematics and layouts are shown in
Figure 5 and Figure 6.
Figure 5: Evaluation Board Schematic
REV. 2 July 2001
7
7페이지 | |||
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부품번호 | 상세설명 및 기능 | 제조사 |
KM4110 | 0.5mA/ Low Cost/ +2.7V & +5V/ 75MHz Rail-to-Rail Amplifiers | Fairchild Semiconductor |
KM4111 | 0.2mA/ Low Cost/ +2.7V & +5V/ 35MHz Rail-to-Rail Amplifiers | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |