Features at 2.7V
130
A supply current per amplifier
4MHz bandwidth
Output swings to within 25mV of either rail
Input voltage range exceeds the rail by >250mV
4V/
s slew rate
16mA output current
22nV/
Hz input voltage noise
Operating temperature range: -40C to +125C
Directly replaces TLC2272 in single supply applications
Available in SOIC-8 and MSOP-8 package options
Available evaluation boards:
KEB006 (SOIC) and KEB010 (MSOP)
Applications
Automotive 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 FAN4272 is an ultra-low cost, low power, voltage feed-
back amplifier. At 5V, the FAN4272 uses only 160
A of
supply current per amplifier and is designed to operate from a
supply range of 2.5V to 5.5V (1.25V to 2.75V). The input
voltage range exceeds the negative and positive rails.
The FAN4272 offers high bipolar performance at a low CMOS
price. The FAN4272 offers superior dynamic performance
with a 4MHz small signal bandwidth and 4V/
s slew rate.
The combination of low power, high bandwidth, and rail-to-
rail performance make the FAN4272 well suited for battery-
powered communication/computing systems.
FAN4272
Dual, Low Cost, +2.7V & +5V, Rail-to-Rail I/O Amplifier
www.fairchildsemi.com
Rev. 2 December 2002
FAN4272 Packages
Large Signal Freq. Response V
s
= +5V
Magnitude (1dB/div)
V
o
= 2V
pp
V
o
= 4V
pp
V
o
= 1V
pp
Frequency (MHz)
1
10
0.1
Output Swing vs. Load V
s
= +5V
Output Voltage (0.25V/div)
Input Voltage (V)
-3
-2
-1
0
1
2
3
-2.5
-2.0
-1.5
-1.0
-0.5
0
2.0
2.5
1.5
1.0
0.5
R
L
= 1k
R
L
= 10k
R
L
= 200
R
L
= 100
R
L
= 75
-
+
-
+
1
2
3
4
Out1
-In1
+In1
-V
s
+V
s
Out2
-In2
+In2
8
7
6
5
MSOP
-
+
-
+
1
2
3
4
Out1
-In1
+In1
-V
s
+V
s
Out2
-In2
+In2
8
7
6
5
SOIC
DATA SHEET
FAN4272
2
Rev. 2 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
+125
C
Input Voltage Range
-Vs -0.5 +Vs +0.5
V
Electrical Specifications
(V
s
= +2.7V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
, T
a
= 25C; unless otherwise noted)
Parameter
Conditions
Min.
Typ.
Max.
Unit
AC Performance
-3dB Bandwidth
1
G = +1, V
o
= 0.02V
pp
4
MHz
G = +2, V
o
= 0.2V
pp
3.7
MHz
Large Signal Bandwidth
G = +2, V
o
= 2V
pp
1.1 MHz
Gain Bandwidth Product
1.7
MHz
Rise and Fall Time
1V step
215
ns
Overshoot
1V step
<1
%
Slew Rate
1V step
4
V/
s
2nd Harmonic Distortion
1V
pp
, 10kHz
-74
dBc
3rd Harmonic Distortion
1V
pp
, 10kHz
-62
dBc
THD
1V
pp
, 10kHz
0.08
%
Input Voltage Noise
>10kHz
22
nV/
Hz
Crosstalk
>100kHz
95
dB
DC Performance
Input Offset Voltage
<0.5
mV
Average Drift
4
V/C
Input Bias Current
90
nA
Average Drift
100
pA/C
Power Supply Rejection Ratio
2
DC
70
85
dB
Open Loop Gain
R
L
= 10k
75
dB
Quiescent Current Per Channel
130
A
Input Characteristics
Input Resistance
12
M
Input Capacitance
1.8
pF
Input Common Mode Voltage Range
-0.25 to 2.95
V
Common Mode Rejection Ratio
DC, V
cm
= 0V to V
s
78
dB
Output Characteristics
Output Voltage Swing
R
L
= 10k
to V
s
/2
2
0.06 to 2.64 0.025 to 2.68
V
R
L
= 1k
to V
s
/2
0.07 to 2.645
V
R
L
= 200
to V
s
/2
0.198 to 2.59
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. Guaranteed by testing or statistical analysis at 25C.
FAN4272
DATA SHEET
Rev. 2 December 2002
3
Electrical Specifications
(V
s
= +5V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
, T
a
= 25C; unless otherwise noted)
Parameter
Conditions
Min.
Typ.
Max.
Unit
AC Performance
-3dB Bandwidth
1
G = +1, V
o
= 0.02V
pp
4
MHz
G = +2, V
o
= 0.2V
pp
4.7
MHz
Large Signal Bandwidth
G = +2, V
o
= 2V
pp
1.7 MHz
Gain Bandwidth Product
1.8
MHz
Rise and Fall Time
1V step
150
ns
Overshoot
1V step
<1
%
Slew Rate
1V step
6
V/
s
2nd Harmonic Distortion
2V
pp
, 10kHz
-73
dBc
3rd Harmonic Distortion
2V
pp
, 10kHz
-75
dBc
THD
2V
pp
, 10kHz
0.03
%
Input Voltage Noise
>10kHz
23
nV/
Hz
Crosstalk
>100kHz
95
dB
DC Performance
Input Offset Voltage
2
-2
<0.5
+2
mV
Average Drift
8
V/C
Input Bias Current
2
-420
90
420
nA
Average Drift
100
pA/
Input Offset Current
2
-50
+50
nA
Power Supply Rejection Ratio
2
DC
70
85
dB
Open Loop Gain
R
L
= 10k
72
dB
Quiescent Current Per Channel
2
160
235
A
Input Characteristics
Input Resistance
12
M
Input Capacitance
1.7
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
R
L
= 10k
to V
s
/2
2
0.09 to 4.91
0.031 to 4.976
V
R
L
= 1k
to V
s
/2
0.094 to 4.94
V
R
L
= 200
to V
s
/2
0.315 to 4.865
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. Guaranteed by testing or statistical analysis at 25C.
3. RL = 10k
to Vs/2.
Package Thermal Resistance
Package
JA
8 lead SOIC
152C/W
8 lead MSOP
206C/W
Typical Operating Characteristics
(V
s
= +5V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
, T
a
= 25C; unless otherwise noted)
4
Rev. 2 December 2002
Non-Inverting Freq. Response V
s
= +5V
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
G = 5
R
f
= 5k
V
o
= 0.2V
pp
G = 10
R
f
= 5k
G = 2
R
f
= 5k
G = 1
R
f
= 0
Inverting Freq. Response V
s
= +5V
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
G = -5
R
f
= 5k
V
o
= 0.2V
pp
G = -10
R
f
= 5k
G = -2
R
f
= 5k
G = -1
R
f
= 5k
Non-Inverting Freq. Response V
s
= +2.7V
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
G = 5
R
f
= 5k
V
o
= 0.2V
pp
G = 10
R
f
= 5k
G = 2
R
f
= 5k
G = 1
R
f
= 0
Inverting Freq. Response V
s
= +2.7V
Normalized Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
G = -5
R
f
= 5k
V
o
= 0.2V
pp
G = -10
R
f
= 5k
G = -2
R
f
= 5k
G = -1
R
f
= 5k
Frequency Response vs. C
L
V
s
= +5V
Magnitude (1dB/div)
Frequency (MHz)
0.01
0.1
1
10
C
L
= 20pf
R
s
= 0
C
L
= 10pf
C
L
= 200pf
C
L
= 100pf
C
L
= 50pf
+
-
5k
5k
R
s
C
L
R
L
Frequency Response vs. R
L
V
s
= +5V
Magnitude (3dB/div)
Frequency (MHz)
0.01
0.1
1
10
R
L
= 1k
R
L
= 2k
R
L
= 10k
R
L
= 100k
Large Signal Freq. Response V
s
= +5V
Magnitude (1dB/div)
V
o
= 2V
pp
V
o
= 4V
pp
V
o
= 1V
pp
Frequency (MHz)
1
10
0.1
Open Loop Gain & Phase vs. Frequency
Open Loop Gain (dB)
Frequency (Hz)
-20
20
40
-180
-135
-90
-45
0
60
80
100
120
140
10
100
1k
10k
100k
1M
10M 100M
Open Loop Phase (deg)
|Gain|
R
L
= 10k
0
1
|Gain|
No Load
Phase
No Load
Phase
R
L
= 10k
DATA SHEET
FAN4272
Typical Operating Characteristics
(V
s
= +5V, G = 2, R
L
= 10k
to V
s
/2, R
f
= 5k
, T
a
= 25C; unless otherwise noted)
FAN4272
DATA SHEET
Harmonic Distortion vs. Freq. V
s
= +5V
Distortion (dBc)
Frequency (kHz)
10
20
30
40
50
60
70
80
90
100
-85
-80
-75
-70
-65
-60
-50
-45
-55
V
o
= 1V
pp
3rd
R
L
= 10k
2nd
R
L
= 10k
3rd
R
L
= 1k
2nd
R
L
= 1k
2nd Harmonic Distortion vs. V
o
for V
s
= +5V
Distortion (dBc)
Output Amplitude (V
pp
)
0.5
1
1.5
2
2.5
-85
-80
-75
-70
-65
-60
-45
-40
-50
-55
100kHz
50kHz
20kHz
10kHz
3rd Harmonic Distortion vs. V
o
for V
s
= +5V
Distortion (dBc)
Output Amplitude (V
pp
)
0.5
1
1.5
2
2.5
-85
-80
-75
-70
-65
-60
-45
-40
-50
-55
100kHz
50kHz
20kHz
10kHz
CMRR vs. Frequency
CMRR (dB)
Frequency (Hz)
100
1000
10000
100000
1000000
-90
-80
-70
-60
-50
-40
-10
0
-20
-30
PSRR vs. Frequency
PSRR (dB)
Frequency (Hz)
100
1000
10000
100000
1000000
-90
-80
-70
-60
-50
-40
-10
0
-20
-30
Output Swing vs. Load V
s
= +5V
Output Voltage (0.25V/div)
Input Voltage (V)
-3
-2
-1
0
1
2
3
-2.5
-2.0
-1.5
-1.0
-0.5
0
2.0
2.5
1.5
1.0
0.5
R
L
= 1k
R
L
= 10k
R
L
= 200
R
L
= 100
R
L
= 75
Pulse Resp. vs. Common Mode Voltage
Output Voltage (0.5V/div)
Time (1
S/div))
2.4V Offset
1.2V Offset
No Offset
-1.2V Offset
-2.4V Offset
Input Voltage Noise V
s
= +5V
nV/
Hz
Frequency (kHz)
0.1
1
10
100
18
21
24
27
30
33
42
45
39
36
Rev. 2 December 2002
5
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