FAN4174/FAN4274 Single and Dual Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifiers
April 2005
FAN4174/FAN4274
Single and Dual Ultra-Low Cost, Rail-to-Rail I/O,
CMOS Amplifiers
Features
■
200
µ
A supply current per amplifier
■
3.7MHz bandwidth
■
Output swing to within 10mV of either rail
■
Input voltage range exceeds the rails
■
3V/
µ
s slew rate
■
25nV/
√
Hz input voltage noise
■
Replaces KM4170 and KM4270
■
FAN4174 competes with OPA340 and TLV2461;
available in lead (Pb) free SC70-5 and SOT23-5 packages
■
FAN4274 competes with OPA2340 and TLV2462;
available in lead (Pb) free MSOP-8 package
■
Fully specified at +2.7V and +5V supplies
The FAN4174 and FAN4274 are designed on a CMOS process
and provide 3.7MHz of bandwidth and 3V/µs of slew rate at a
supply voltage of 5V. The combination of low power, rail-to-rail
performance, low voltage operation, and tiny package options
make this amplifier family well suited for use in many general
purpose and battery powered applications.
Description
The FAN4174 (single) and FAN4274 (dual) are ultra-low cost,
voltage feedback amplifiers with CMOS inputs that consume
only 200
µ
A of supply current per amplifier while providing
±33mA of output short circuit current. These amplifiers are
designed to operate from 2.5V to 5V supplies. The common
mode voltage range extends beyond the negative and positive
rails.
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
.
8
7
6
5
4
3
2
1
0
-1
-2
-3
0.1
V
o
= 50mV
C
L
= 500pF
R
s
= 165Ω
C
L
= 2000pF
R
s
= 65Ω
C
L
= 50pF
R
s
= 0
Gain (dB)
C
L
= 1000pF
R
s
= 100Ω
C
L
= 100pF
R
s
= 0
R
s
+
-
5kΩ
5kΩ
C
L
R
L
Typical Application Diagram
+V
s
6.8µF
+
1.0
10
Frequency (MHz)
+In
+
-
R
g
0.01µF
Out
R
f
6.8µF
+
FAN4174
0.01µF
-V
s
FAN4174/FAN4274 Rev. 2D
1
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©2005 Fairchild Semiconductor Corporation
FAN4174/FAN4274 Single and Dual Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifiers
FAN4174 Pin Configurations
SOT23
FAN4174 Pin Assignments
Pin#
1
Pin
OUT
-Vs
+IN
-IN
+Vs
Output
Description
Negative Supply
Positive Supply
Negative Input
Positive Supply
OUT
-V
s
+IN
1
2
+
5
+V
s
2
3
4
-
5
3
4
-IN
SC70
OUT
-V
s
+IN
1
2
+
5
+V
s
-
3
4
-IN
FAN4274 Pin Configuration
MSOP-8
FAN4274 Pin Assignments
Pin#
1
Pin
OUT1
-IN1
+IN1
-Vs
+IN2
-IN2
OUT2
+Vs
Description
Output, Channel 1
Negative Input, Channel 1
Positive Input, Channel 1
Negative Supply
Positive Input, Channel 2
Negative Input, Channel 2
Output, Channel 2
Positive Supply
OUT1
-IN1
+IN1
-V
s
1
2
3
4
-
+
8
7
-
+
+V
s
OUT2
-IN2
+IN2
2
3
4
5
6
7
8
6
5
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2
FAN4174/FAN4274 Rev. 2D
FAN4174/FAN4274 Single and Dual Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifiers
Reliability Information
Parameter
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10s)
Thermal Resistance (
θ
JA
), 5 Lead SOT23
1
Thermal Resistance (
θ
JA
), 5 Lead SC70
1
Thermal Resistance (
θ
JA
), 8 Lead MSOP
1
256
331
206
-65
Min.
Typ.
Max.
150
+150
+300
Unit
°C
°C
°C
°C/W
°C/W
°C/W
Note:
1. Package thermal resistance
(
θ
JA
)
, JEDEC standard, multi-layer test boards, still air.
Absolute Maximum Ratings
Parameter
Supply Voltage
Input Voltage Range
Min.
0
-V
s
-0.5
Max.
6
+V
s
+0.5
Unit
V
V
Note:
Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if operating conditions are not
exceeded.
Recommended Operating Conditions
Parameter
Operating Temperature Range
Min.
-40
Typ.
Max.
+85
Unit
°C
FAN4174/FAN4274 Rev. 2D
3
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FAN4174/FAN4274 Single and Dual Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifiers
Electrical Specifications at +2.7V
(
V
S
= +2.7V, G = 2, R
L
= 10k
Ω
to V
S
/2, R
F
= 5k
Ω
; unless otherwise noted)
Symbol Parameter
Frequency Domain Response
UGBW
BW
SS
GBWP
-3dB Bandwidth
-3dB Bandwidth
Gain Bandwidth product
Time Domain Response
t
R
, t
F
OS
SR
Rise and Fall Time
Overshoot
Slew Rate
Distortion and Noise Response
HD2
HD3
THD
e
n
X
TALK
V
IO
dV
IO
I
bn
PSRR
A
OL
I
S
R
IN
C
IN
CMIR
2nd Harmonic Distortion
3rd Harmonic Distortion
Total Harmonic Distortion
Input Voltage Noise
Crosstalk (FAN4274)
DC Performance
Input Offset Voltage
1
Average Drift
Input Bias Current
Power Supply Rejection Ratio
1
Open Loop Gain
Supply Current Per
Amplifier
1
DC
DC
50
-6
0
2.1
5
73
98
200
300
+6
mV
µ
V/°C
pA
dB
dB
µ
A
G
Ω
pF
V
V
dB
dB
100kHz
V
o
=1V
pp
, 10kHz
V
o
=1V
pp
, 10kHz
V
o
=1V
pp
, 10kHz
-66
-67
0.1
26
-100
dBc
dBc
%
V
o
= 1.0V step
V
o
= 1.0V step
V
o
= 3V step, G = -1
300
5
3
ns
%
V/
µ
s
G = +1
4
2.5
4
MHz
MHz
MHz
Conditions
Min
Typ Max Units
nV/
√
Hz
dB
Input Characteristics
Input Resistance
Input Capacitance
Input Common Mode Voltage Range
typical (FAN4174)
typical (FAN4274)
CMRR
Common Mode Rejection Ratio
1
DC, V
CM
= 0V to 2.2V for FAN4174
DC, V
CM
= 0V to 2.7V for FAN4274
Output Characteristics
V
O
Output Voltage Swing
1
R
L
= 10k
Ω
to V
S
/2
R
L
= 1k
Ω
to V
S
/2
I
SC
V
S
Short Circuit Output Current
Power Supply Operating Range
0.03
0.01 to
2.69
0.05 to
2.55
+34/-12
10
1.4
-0.3 to
2.6
-0.3 to
3.0
50
50
65
65
2.65
V
V
mA
V
2.5 to
5.5
Notes:
1. 100% tested at 25°C.
www.fairchildsemi.com
4
FAN4174/FAN4274 Rev. 2D
FAN4174/FAN4274 Single and Dual Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifiers
Electrical Specifications at +5V
(
V
S
= +5V, G = 2, R
L
= 10k
Ω
to V
S
/2, R
F
= 5k
Ω
; unless otherwise noted)
Symbol Parameter
Frequency Domain Response
UGBW
BW
SS
GBWP
-3dB Bandwidth
-3dB Bandwidth
Gain Bandwidth product
Time Domain Response
t
R
, t
F
OS
SR
Rise and Fall Time
Overshoot
Slew Rate
Distortion and Noise Response
HD2
HD3
THD
e
n
X
TALK
V
IO
dV
IO
I
bn
PSRR
A
OL
I
S
R
IN
C
IN
CMIR
CMRR
2nd Harmonic Distortion
3rd Harmonic Distortion
Total Harmonic Distortion
Input Voltage Noise
Crosstalk (FAN4274)
DC Performance
Input Offset Voltage
1
Average Drift
Input Bias Current
Power Supply Rejection Ratio
1
Open Loop Gain
Supply Current Per
Amplifier
1
DC
DC
50
-8
0
2.9
5
73
102
200
300
+8
mV
µV/°C
pA
dB
dB
µA
GΩ
pF
V
dB
100kHz
V
o
=1V
pp
, 10kHz
V
o
=1V
pp
, 10kHz
V
o
=1V
pp
, 10kHz
-80
-80
0.02
25
-100
dBc
dBc
%
V
o
= 1.0V step
V
o
= 1.0V step
V
o
= 3V step, G = -1
300
5
3
ns
%
V/
µ
s
G = +1
3.7
2.3
3.7
MHz
MHz
MHz
Conditions
Min
Typ Max Units
nV/√Hz
dB
Input Characteristics
Input Resistance
Input Capacitance
Input Common Mode Voltage Range
Common Mode Rejection Ratio
1
Output Characteristics
V
O
Output Voltage Swing
1
R
L
= 10kΩ to V
S
/2
R
L
= 1kΩ to V
S
/2
I
SC
V
S
Short Circuit Output Current
Power Supply Operating Range
0.03
0.01 to
4.99
0.1 to
4.9
±33
2.5 to
5.5
4.95
V
V
mA
V
typical
DC, V
CM
= 0V to V
S
58
10
1.2
-0.3 to
5.3
73
Notes:
1. 100% tested at 25°C.
FAN4174/FAN4274 Rev. 2D
5
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