REV. 1D December 2004
www.fairchildsemi.com
Features at +5V
200
A supply current per amplifier
3.7MHz bandwidth
Output swing to within 10mV of either rail
Input voltage range exceeds the rails
3V/
s slew rate
25nV/
Hz input voltage noise
Competes with OPA340 and TLV2461
Package options (SC70-5 and SOT23-5)
Fully specified at +2.7V and +5V supplies
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 FAN4174 is a single, ultra-low cost, voltage feedback
amplifier with CMOS inputs that consumes only 200
A of
supply current while providing 33mA of output short
circuit current. The FAN4174 is designed to operate from
2.5V to 5V supplies. The common mode voltage range
extends beyond the negative and positive rails.
The FAN4174 is designed on a CMOS process and provides
3.7MHz of bandwidth and 3V/
s 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 the FAN4174 well suited for use in many gen-
eral purpose and battery powered applications.
FAN4174
Single, Ultra-Low Cost, Rail-to-Rail I/O, CMOS Amplifier
Pin Assignments
+
-
FAN4174
R
f
0.01
F
6.8
F
Out
+In
+V
s
+
0.01
F
6.8
F
-V
s
+
R
g
Typical Application
SOT23
SC70
-
+
1
2
3
Out
-V
s
+In
+V
s
-In
5
4
-
+
1
2
3
Out
-V
s
+In
+V
s
-In
5
4
Frequency Response vs. C
L
Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
C
L
= 50pF
R
s
= 0
C
L
= 500pF
R
s
= 165
C
L
= 2000pF
R
s
= 65
V
o
= 50mV
C
L
= 1000pF
R
s
= 100
C
L
= 100pF
R
s
= 0
+
-
5k
5k
R
s
C
L
R
L
2
REV. 1D December 2004
DATA SHEET
FAN4174
Electrical Specifications at +2.7V
(
V
S
= +2.7V, G = 2, R
L
= 10k
to V
S
/2, R
F
= 5k
; unless otherwise noted)
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. 100% tested at 25C.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Frequency Domain Response
UGBW
-3dB Bandwidth
G = +1
4
MHz
BW
SS
-3dB Bandwidth
2.5
MHz
GBWP
Gain Bandwidth product
4
MHz
Time Domain Response
t
R
, t
F
Rise and Fall Time
V
o
= 1.0V step
300
ns
OS
Overshoot
V
o
= 1.0V step
5
%
SR
Slew Rate
V
o
= 3V step, G = -1
3
V/
s
Distortion and Noise Response
HD2
2nd Harmonic Distortion
V
o
=1V
pp
, 10kHz
-66
dBc
HD3
3rd Harmonic Distortion
V
o
=1V
pp
, 10kHz
-67
dBc
THD
Total Harmonic Distortion
V
o
=1V
pp
, 10kHz
0.1
%
e
n
Input Voltage Noise
26
nV/
Hz
DC Performance
V
IO
Input Offset Voltage
1
-6
0
+6
mV
dV
IO
Average Drift
2.1
V/C
I
bn
Input Bias Current
5
pA
PSRR
Power Supply Rejection Ratio
1
DC
50
73
dB
A
OL
Open Loop Gain
DC
98
dB
I
S
Quiescent Current Per Amplifier
1
200
300
A
Input Characteristics
R
IN
Input Resistance
10
G
C
IN
Input Capacitance
1.4
pF
CMIR
Input Common Mode Voltage Range
typical
-0.3 to
2.6
V
CMRR
Common Mode Rejection Ratio
1
DC, V
CM
= 0V to 2.2V
50
65
dB
Output Characteristics
V
O
Output Voltage Swing
1
R
L
= 10k
to V
S
/2
0.03 0.01 to
2.69
2.65
V
R
L
= 1k
to V
S
/2
0.05 to
2.55
V
I
SC
Short Circuit Output Current
+12/-34
mA
V
S
Power Supply Operating Range
2.5 to
5.5
V
REV. 1D December 2004
3
FAN4174
DATA SHEET
Electrical Specifications at +5V
(
V
S
= +5V, G = 2, R
L
= 10k
to V
S
/2, R
F
= 5k
; unless otherwise noted)
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. 100% tested at 25C.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Frequency Domain Response
UGBW
-3dB Bandwidth
G = +1
3.7
MHz
BW
SS
-3dB Bandwidth
2.3
MHz
GBWP
Gain Bandwidth product
3.7
MHz
Time Domain Response
t
R
, t
F
Rise and Fall Time
V
o
= 1.0V step
300
ns
OS
Overshoot
V
o
= 1.0V step
5
%
SR
Slew Rate
V
o
= 3V step, G = -1
3
V/
s
Distortion and Noise Response
HD2
2nd Harmonic Distortion
V
o
=1V
pp
, 10kHz
-80
dBc
HD3
3rd Harmonic Distortion
V
o
=1V
pp
, 10kHz
-80
dBc
THD
Total Harmonic Distortion
V
o
=1V
pp
, 10kHz
0.02
%
e
n
Input Voltage Noise
25
nV/
Hz
DC Performance
V
IO
Input Offset Voltage
1
-8
0
+8
mV
dV
IO
Average Drift
2.9
V/C
I
bn
Input Bias Current
5
pA
PSRR
Power Supply Rejection Ratio
1
DC
50
73
dB
A
OL
Open Loop Gain
DC
102
dB
I
S
Quiescent Current Per Amplifier
1
200
300
A
Input Characteristics
R
IN
Input Resistance
10
G
C
IN
Input Capacitance
1.2
pF
CMIR
Input Common Mode Voltage Range
typical
-0.3 to
5.3
V
CMRR
Common Mode Rejection Ratio
1
DC, V
CM
= 0V to V
S
58
73
dB
Output Characteristics
V
O
Output Voltage Swing
1
R
L
= 10k
to V
S
/2
0.03 0.01 to
4.99
4.95
V
R
L
= 1k
to V
S
/2
0.1 to
4.9
V
I
SC
Short Circuit Output Current
33
mA
V
S
Power Supply Operating Range
2.5 to
5.5
V
4
REV. 1D December 2004
DATA SHEET
FAN4174
Absolute Maximum Ratings
(beyond which the device may be damaged)
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
Reliability Information
Note:
1. Package thermal resistance (
JA
), JDEC standard multi-layer test boards, still air.
Parameter
Min
Max
Units
Supply Voltage
0
6
V
Input Voltage Range
-V
S
-0.5V
+V
S
+0.5V
V
Parameter
Min
Typ
Max
Units
Operating Temperature Range (Recommended)
-40
+85
C
Parameter
Min
Typ
Max
Units
Junction Temperature
175
C
Storage Temperature Range
-65
+150
C
Lead Temperature (Soldering, 10s)
+300
C
Thermal Resistance (
JA
), 5 Lead SOT23
1
256
C/W
Thermal Resistance (
JA
), 5 Lead SC70
1
331.4
C/W
REV. 1D December 2004
5
FAN4174
DATA SHEET
Typical Performance Characteristics
(
V
S
= +2.7V, G = 2, R
L
= 10k
to V
S
/2, R
F
= 5k
; unless otherwise noted)
Non-Inverting Freq. Resp. (V
s
= +5V)
Nor
maliz
ed Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
G = 10
G = 5
G = 1
R
f
= 0
G = 2
V
o
= 0.2V
pp
Inverting Freq. Response (V
s
= +5V)
Nor
maliz
ed Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
G = -10
G = -5
G = -1
G = -2
V
o
= 0.2V
pp
Non-Inverting Frequency Response
Nor
maliz
ed Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
G = 10
G = 5
G = 1
R
f
= 0
G = 2
V
o
= 0.2V
pp
Inverting Frequency Response
Nor
maliz
ed Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
G = -10
G = -5
G = -1
G = -2
V
o
= 0.2V
pp
Frequency Response vs. C
L
Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
C
L
= 50pF
R
s
= 0
C
L
= 500pF
R
s
= 165
C
L
= 2000pF
R
s
= 65
V
o
= 50mV
Frequency Response vs. R
L
Magnitude (1dB/div)
Frequency (MHz)
1.0
10
0.1
R
L
= 200
R
L
= 10k
R
L
= 1k
V
o
= 0.2V
pp
Large Signal Freq. Resp. (V
s
= +5V)
Frequency (MHz)
1.0
10
0.1
Magnitude (1dB/div)
-10
V
o
= 4V
pp
V
o
= 1V
pp
V
o
= 2V
pp
Open Loop Gain & Phase vs. Frequency
Frequency (Hz)
10M
1M
100k
10k
1k
100
10
1
Phase
Gain
C
L
= 1000pF
R
s
= 100
C
L
= 100pF
R
s
= 0
+
-
5k
5k
R
s
C
L
R
L
R
L
= 50
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
Open Loop Gain (dB)
-40
-20
0
20
40
60
80
100
120
Open Loop Phase (Deg
ree)
-180
-135
-90
-45
0
6
REV. 1D December 2004
DATA SHEET
FAN4174
Typical Performance Characteristics
(
V
S
= +2.7V, G = 2, R
L
= 10k
to V
S
/2, R
F
= 5k
; unless otherwise noted)
2nd & 3rd Harmonic Distortion
2nd Harmonic Distortion vs. V
o
Pulse Resp. vs. Common Mode Voltage
Time (0.5
s/div)
Output V
oltage (0.25V/div)
-1.5
Input Voltage Noise
Frequency (Hz)
1M
100k
10k
1k
0.1k
Input V
oltage Noise (nV/
Hz)
15
20
25
30
35
40
45
50
55
60
65
70
75
Output Amplitude (V
pp
)
2.5
2.25
2
1.75
1.5
1.25
1
0.75
0.5
Distor
tion (dBc)
-85
-75
-70
-65
-60
-55
-50
-45
120
Frequency (kHz)
100
10
20
30
40
50
60
70
80
90
Distor
tion (dBc)
-70
-68
-80
-66
-64
-62
-60
-58
-56
-54
-52
-50
-48
-46
2nd; R
L
= 1k
2nd; R
L
= 10k
2nd; R
L
= 200k
3rd; R
L
= 1k
3rd; R
L
= 10k
3rd; R
L
= 200k
100kHz
50kHz
20kHz
10kHz
3rd Harmonic Distortion vs. V
o
Output Amplitude (V
pp
)
2.5
2.25
2
1.75
1.5
1.25
1
0.75
0.5
Distor
tion (dBc)
-85
-75
-70
-65
-60
-55
-50
-45
120
-80
100kHz
50kHz
20kHz
10kHz
CMRR V
s
= 5V
Frequency (Hz)
10k
100k
1k
100
10
CMRR (dB)
0
20
30
40
50
60
70
80
10
PSRR V
s
= 5V
Frequency (Hz)
10k
100k
1k
100
10
PSRR (dB)
0
20
30
40
50
60
70
80
10
Output Swing vs. Load
Input Voltage (0.5V/div)
1
2
0
-1
0.5
1.5
-0.5
-1.5
-2
Output V
oltage (0.15V/div)
-1.35
-1.5
-0.75
-0.45
-0.15
0.15
0.45
0.75
1.05
1.35
R
L
= 75
R
L
= 200
R
L
= 100
R
L
= 1k
R
L
= 10k
1.2V offset
0.6V offset
no offset
-0.6V offset
-1.2V offset
-1
-0.5
0
0.5
1
1.5
G = 1
REV. 1D December 2004
7
FAN4174
DATA SHEET
+
-
FAN4174
R
f
0.01
F
6.8
F
Out
In
+V
s
+
R
g
R
out
-
+
10k
V
o
V
in
+
-
R
f
R
g
R
s
C
L
R
L
Application Information
General Description
The FAN4174 amplifier is a single supply, general purpose,
voltage-feedback amplifier. Fabricated on a bi-CMOS pro-
cess. The FAN4174 features a rail-to-rail input and output
and is unity gain stable.
The typical non-inverting circuit schematic is shown in Figure 1.
Figure 1: Typical Non-inverting Configuration
Input Common Mode Voltage
The common mode input range extends to 300mV below
ground and to 100mV above Vs, in single supply operation.
Exceeding these values will not cause phase reversal. How-
ever, if the input voltage exceeds the rails by more than 0.5V,
the input ESD devices will begin to conduct. The output will
stay at the rail during this overdrive condition. If the abso-
lute maximum input voltage (700mV beyond either rail) is
exceeded, externally limit the input current to 5mA as
shown in Figure 2.
Figure 2: Circuit for Input Current Protection
Power Dissipation
The maximum internal power dissipation allowed is directly
related to the maximum junction temperature. If the maximum
junction temperature exceeds 150C, some performance
degradation will occur. If the maximum junction temperature
exceeds 175C for an extended time, device failure may
occur.
Overdrive Recovery
Overdrive of an amplifier occurs when the output and/or
input ranges are exceeded. The recovery time varies based
on whether the input or output is overdriven and by how
much the ranges are exceeded. The FAN4174 will typically
recover in less than 500ns from an overdrive condition.
Figure 3 shows the FAN4174 amplifier in an overdriven
condition.
Figure 3: Overdrive Recovery
Driving Capacitive Loads
The Frequency Response vs. C
L
plot, illustrates the response
of the FAN4174 amplifier family. A small series resistance
(R
s
) at the output of the amplifier, illustrated in Figure 4, will
improve stability and settling performance. R
s
values in the
Frequency Response vs. C
L
plot were chosen to achieve max-
imum bandwidth with less than 2dB of peaking. For maxi-
mum flatness, use a larger R
s
. Capacitive loads larger than
500pF require the use of R
s
.
Figure 4: Typical Topology for driving
a capacitive load
Driving a capacitive load introduces phase-lag into the out-
put signal, which reduces phase margin in the amplifier. The
unity gain follower is the most sensitive configuration. In a
unity gain follower configuration, the FAN4174 amplifier
family requires a 300
series resistor to drive a 100pF load.
Input V
oltage (0.5V/div)
Time (1
s/div)
Output
Input
G = 5
V
S
= 2.7V
8
REV. 1D December 2004
DATA SHEET
FAN4174
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 as aid
in device testing and characterization. Follow the steps
below as a basis for high frequency layout:
Include 6.8
F and 0.01F ceramic capacitors
Place the 6.8
F capacitor within 0.75 inches of
the power pin
Place the 0.01
F capacitor within 0.1 inches of
the power pin
Remove the ground plane under and around the
part, especially near the input and output pins to
reduce parasitic capacitance
Minimize all trace lengths to reduce series
inductances
Refer to the evaluation board layouts shown in Figure 6 for
more information.
When evaluating only one channel, complete the
following on the unused channel:
1. Ground the non-inverting input
2. Short the output to the inverting input
Evaluation Board Information
The following evaluation boards are available to aid in the
testing and layout of this device:
Evaluation board schematics are shown in Figures 5 and
layouts are shown in Figure 6a and 6b.
Figure 5: FAN4174 Evaluation Board Schematic
Eval Bd
Description
Products
KEB002
Single Channel, Dual Supply,
FAN4174AS5X
5 and 6 lead SOT23
KEB011
Single Channel, Dual Supply,
FAN4174AP5X
5 and 6 lead SC70
REV. 1D December 2004
9
FAN4174
DATA SHEET
Evaluation Board Layout
Figure 6a: KEB002 (top side)
Figure 6b: KEB002 (bottom side)
10
REV. 1D December 2004
DATA SHEET
FAN4174
Packaging Dimensions
b
e
e1
D
CL
E
CL
CL
A
A2
A1
E1
C
2
DA
TUM 'A'
CL
NOTE:
1. All dimensions are in millimeters.
2 Foot length measured reference to flat
foot surface parallel to DATUM 'A' and lead surface.
3. Package outline exclusive of mold flash & metal burr.
4. Package outline inclusive of solder plating.
5. Comply to EIAJ SC74A.
6. Package ST 0003 REV A supercedes SOT-D-2005 REV C.
SYMBOL
MIN
MAX
A
0.90
1.45
A1
0.00
0.15
A2
0.90
1.30
b
0.25
0.50
C
0.09
0.20
D
2.80
3.10
E
2.60
3.00
E1
1.50
1.75
L
0.35
0.55
e
0.95 ref
e1
1.90 ref
0
10
SOT-23
SYMBOL
MIN
MAX
e 0.65 BSC
D
1.80
2.20
b
0.15
0.30
E
1.15
1.35
HE
1.80
2.40
Q1
0.10
0.40
A2
0.80
1.00
A1
0.00
0.10
A
0.80
1.10
c
0.10
0.18
L
1.10
0.30
b
e
D
CL
HE
CL
CL
A
A2
A1
E
C
CL
NOTE:
1. All dimensions are in millimeters.
2. Dimensions are inclusive of plating.
3. Dimensions are exclusive of mold flashing and metal burr.
4. All speccifications comply to EIAJ SC70.
L
Q1
SC70
www.fairchildsemi.com
2004 Fairchild Semiconductor Corporation
FAN4174
DATA SHEET
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICES TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION
OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES
IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN
APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:
Ordering Information
Temperature range for all parts: -40C to +85C.
Model
Part Number
Lead
Free
Package
Container
Pack Qty
FAN4174
FAN4174IS5X_NL
SOT23-5
Reel
3000
FAN4174
FAN4174IP5X_NL
SC70-5
Reel
3000
1. Life support devices or systems are devices or systems which, (a) are intended for
surgical implant into the body, or (b) support or sustain life, and (c) whose failure to per
form when properly used in accordance with instructions for use provided in the labeling,
can be reasonably expected to result in a significant injury of the user.
2. A critical component in any component of a life support device or system whose failure
to perform can be reasonably expected to cause the failure of the life support device or
system, or to affect its safety or effectiveness.
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