KM7101 Ultra-Low Cost, 136A, 4.9MHz Rail-to-Rail I/O Amplifier
Features
136
A supply current
4.9MHz bandwidth
Output swings to within 20mV of either rail
Input voltage range exceeds the rail by >250mV
5.3V/
s slew rate
16mA output current
21nV/
Hz input voltage noise
Directly replaces LMC7101 in single supply applications
Available in SOT23-5 package
Applications
Portable/battery-powered applications
PCMCIA, USB
Mobile communications, cellular phones, pagers
Notebooks and PDA's
Sensor Interface
A/D buffer
Active filters
Signal conditioning
Portable test instruments
Description
The KM7101 is an ultra-low cost, low power, voltage feed-
back amplifier that is pin compatible to the LMC7101. If a
standard pinout is required, use the KM4170. The KM7101
uses only 136
A of supply current and offers no crossover
distortion. The input common mode voltage range exceeds
the negative and positive rails.
The KM7101 offers high bipolar performance at a low
CMOS price. The KM7101 offers superior dynamic perfor-
mance with a 4.9MHz small signal bandwidth and 5.3V/
s
slew rate. The combination of low power, high bandwidth,
and rail-to-rail performance make the KM7101 well suited for
battery-powered communication/computing systems.
KM7101
Ultra-Low Cost, 136
A, 4.9MHz Rail-to-Rail I/O Amplifier
www.fairchildsemi.com
REV. 4 December 2002
KM7101 Package
-
+
1
2
3
Out
+V
s
+In
-V
s
-In
5
4
SOT23-5
Large Signal Frequency Response
Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
V
o
= 4V
pp
V
s
= 5V
V
o
= 1V
pp
V
o
= 2V
pp
Output Swing vs. Load
Output Voltage (0.27V/div)
Input Voltage (0.4V/div)
-2.0
0
2.0
-1.35
0
1.35
R
L
= 10k
R
L
= 1k
R
L
= 75/100
R
L
= 200
R
L
= 100
R
L
= 75
DATA SHEET
KM7101
2
REV. 4 December 2002
Absolute Maximum Ratings
Parameter
Min.
Max.
Unit
Supply Voltages
0
+6
V
Maximum Junction Temperature
+175
C
Storage Temperature Range
-65
+150
C
Lead Temperature, 10 seconds
+260
C
Operating Temperature Range, recommended
-40
+85
C
Input Voltage Range
-Vs -0.5 +Vs +0.5
V
Iout Continuous
-30
+30
mA
Electrical Specifications
(V
s
= +2.7V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
; unless otherwise noted)
Parameter
Conditions
Min.
Typ.
Max.
Unit
AC Performance
-3dB Bandwidth
1
G = +1, V
o
= 0.02V
pp
4.9
MHz
G = +2, V
o
= 0.2V
pp
3.7
MHz
Full Power Bandwidth
G = +2, V
o
= 2V
pp
1.4 MHz
Gain Bandwidth Product
2.2
MHz
Rise and Fall Time
1V step
163
ns
Overshoot
1V step
<1
%
Slew Rate
1V step
5.3
V/
s
2nd Harmonic Distortion
1V
pp
, 10kHz
-72
dBc
3rd Harmonic Distortion
1V
pp
, 10kHz
-72
dBc
THD
1V
pp
, 10kHz
0.03
%
Input Voltage Noise
>10kHz
21
nV/
Hz
DC Performance
Input Offset Voltage
2
-6
0.5
+6
mV
Average Drift
5
V/C
Input Bias Current
2
90
420
nA
Average Drift
32
pA/C
Power Supply Rejection Ratio
2
DC
55
83
dB
Open Loop Gain
R
L
= 10k
90
dB
Quiescent Current Per Channel
2
136
190
A
Input Characteristics
Input Resistance
12
M
Input Capacitance
2
pF
Input Common Mode Voltage Range
-0.25 to 2.95
V
Common Mode Rejection Ratio
2
DC, V
cm
= 0V to V
s
55
81
dB
Output Characteristics
Output Voltage Swing
2
R
L
= 10k
to V
s
/2
0.06 to 2.64 0.02 to 2.68
V
R
L
= 1k
to V
s
/2
0.05 to 2.63
V
R
L
= 200
to V
s
/2
0.11 to 2.52
V
Output Current
16
mA
Power Supply Operating Range
2.5
2.7
5.5
V
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
Notes:
1. For G = +1, Rf = 0.
2. For RL = 10k
, 100% tested at 25C.
KM7101
DATA SHEET
REV. 4 December 2002
3
Electrical Specifications
(V
s
= +5V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
; unless otherwise noted)
Parameter
Conditions
Min.
Typ.
Max.
Unit
AC Performance
-3dB Bandwidth
1
G = +1, V
o
= 0.02V
pp
4.3
MHz
G = +2, V
o
= 0.2V
pp
3.0
MHz
Full Power Bandwidth
G = +2, V
o
= 2V
pp
2.3 MHz
Gain Bandwidth Product
2.0
MHz
Rise and Fall Time
1V step
110
ns
Overshoot
1V step
<1
%
Slew Rate
1V step
9
V/
s
2nd Harmonic Distortion
1V
pp
, 10kHz
-73
dBc
3rd Harmonic Distortion
1V
pp
, 10kHz
-75
dBc
THD
1V
pp
, 10kHz
0.03
%
Input Voltage Noise
>10kHz
22
nV/
Hz
DC Performance
Input Offset Voltage
2
-8
1.5
+8
mV
Average Drift
15
V/C
Input Bias Current
2
90
450
nA
Average Drift
40
pA/C
Power Supply Rejection Ratio
2
DC
40
60
dB
Open Loop Gain
R
L
= 10k
80
dB
Quiescent Current Per Channel
2
160
235
A
Input Characteristics
Input Resistance
12
M
Input Capacitance
2
pF
Input Common Mode Voltage Range
-0.25 to 5.25
V
Common Mode Rejection Ratio
2
DC, V
cm
= 0V to V
s
58
85
dB
Output Characteristics
Output Voltage Swing
2
R
L
= 10k
to V
s
/2
0.08 to 4.92 0.04 to 4.96
V
R
L
= 1k
to V
s
/2
0.07 to 4.9
V
R
L
= 200
to V
s
/2
0.14 to 4.67
V
Output Current
30
mA
Power Supply Operating Range
2.5
2.7
5.5
V
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
Notes:
1. For G = +1, Rf = 0.
2. For RL = 10k
, 100% tested at 25C.
Package Thermal Resistance
Package
JA
5 lead SOT23
256C/W
Non-Inverting Freq. Response V
s
= +5V
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
G = 10
R
f
= 5k
1
10
G = 5
R
f
= 5k
G = 1
R
f
= 0
G = 2
R
f
= 5k
V
o
= 0.2V
pp
Inverting Frequency Response V
s
= +5V
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
G = -10
R
f
= 5k
1
10
G = -5
R
f
= 5k
G = -1
R
f
= 5k
G = -2
R
f
= 5k
V
o
= 0.2V
pp
Non-Inverting Frequency Response
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
G = 10
R
f
= 5k
1
10
G = 5
R
f
= 5k
G = 1
R
f
= 0
G = 2
R
f
= 5k
V
o
= 0.2V
pp
Inverting Frequency Response
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
G = -10
1
10
G = -5
G = -1
G = -2
R
f
= 5k
Frequency Response vs. C
L
Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
C
L
= 100pF
R
s
= 100
C
L
= 10pF
R
s
= 0
C
L
= 50pF
R
s
= 0
C
L
= 20pF
R
s
= 0
+
-
5k
5k
R
s
C
L
R
L
V
o
= 0.05V
Frequency Response vs. R
L
Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
R
L
= 1k
R
L
= 50
R
L
= 10k
R
L
= 200
Large Signal Frequency Response
Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
V
o
= 4V
pp
V
s
= 5V
V
o
= 1V
pp
V
o
= 2V
pp
Open Loop Gain & Phase vs. Frequency
Open Loop Gain (dB)
Frequency (Hz)
10
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
-20
60
140
Phase
No load
0
Open Loop Phase (deg)
-180
-90
0
-135
-45
|Gain|
No load
Phase
R
L
= 10k
|Gain|
R
L
= 10k
V
s
= 5V
20
40
80
120
100
DATA SHEET
KM7101
4
REV. 4 December 2002
Typical Operating Characteristics
(V
s
= +2.7V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
; unless otherwise noted)
2nd & 3rd Harmonic Distortion
Distortion (dBc)
Frequency (kHz)
0
20
40
60
80
3rd
R
L
= 1k
100
3rd
R
L
= 200
2nd
R
L
= 10k
2nd
R
L
= 1k
-90
-80
-70
-60
-50
-40
-30
-20
V
o
= 1V
pp
3rd
R
L
= 10k
2nd
R
L
= 200
2nd Harmonic Distortion vs. V
o
Distortion (dB)
Output Amplitude (V
pp
)
0.5
1
1.5
2
100kHz
50kHz
10kHz
2.5
-90
-80
-70
-60
-50
-40
-30
-20
10kHz, 20kHz
50kHz
3rd Harmonic Distortion vs. V
o
Distortion (dB)
Output Amplitude (V
pp
)
0.5
1
1.5
2
100kHz
50kHz
10kHz
2.5
-90
-80
-70
-60
-50
-40
-30
-20
20kHz
CMRR
CMRR (dB)
Frequency (Hz)
10
100
10000
1000
100000
-90
-80
-70
-60
0
-50
-40
-10
-30
-20
PSRR
PSRR (dB)
Frequency (Hz)
10
10000
1000
100
100000
-90
-70
-60
-50
-40
0
-30
-20
-10
-80
Output Swing vs. Load
Output Voltage (0.27V/div)
Input Voltage (0.4V/div)
-2.0
0
2.0
-1.35
0
1.35
R
L
= 10k
R
L
= 1k
R
L
= 75/100
R
L
= 200
R
L
= 100
R
L
= 75
Pulse Resp. vs. Common Mode Voltage
Output Voltage (0.5V/div)
Time (1
s/div)
1.2V offset
0.6V offset
No offset
-0.6V offset
-1.2V offset
Input Voltage Noise
nV/
Hz
Frequency (Hz)
0.1k
100k
10k
1k
1M
0
10
15
20
25
55
30
35
40
45
50
5
KM7101
DATA SHEET
REV. 4 December 2002
5
Typical Operating Characteristics
(V
s
= +2.7V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
; unless otherwise noted)
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