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www.fairchildsemi.com
FAN4050
Precision Micropower Shunt Voltage Reference
Features
•
•
•
•
•
•
Fixed 2.500V and 3.300V
Tolerances to +0.1% (25°C)
Low output noise
Low temperature coefficient, 50ppm/°C max
Small package: SOT-23
Extended operating current range
Description
The FAN4050 series of precision shunt references are ideal for
space- and cost-sensitive applications. They are available in
two output voltages (2.500V and 3.300V) and with a variety
of output voltage tolerances (0.1%, 0.2%, and 0.5%). They
also have excellent temperature coefficients, 50ppm/°C.
The FAN4050 series is available in the SOT-23 package.
Applications
•
•
•
•
•
Portable equipment
Disk drives
Instrumentation
Audio equipment
Data acquisition systems
Connection Diagram
SOT-23
+
1
3*
–
2
*This pin must be left floating
or connected to pin 2.
Top View
REV. 1.0.1 9/29/00
FAN4050
PRODUCT SPECIFICATION
Absolute Maximum Ratings
1
Ratings are over full operating free-air temperature range unless otherwise noted.
Parameter
Continuous cathode current, IK
Power dissipation
2
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
-65
Min.
-30
Max.
+30
280
150
300
Unit
mA
mW
°C
°C
Notes:
1. Functional operation under these conditions is not implied. Permanent damage may occur if the device is subjected to
conditions outside these ratings.
2. It is recommended to connect pin 3 to pin 2 in the SSOT23 package to ensure optimal thermal performance.
Recommended Operating Conditions
Parameter
Continuous cathode current, IK
Operating temperature range in free air, TA
Min.
0.07
-40
Max.
15
85
Unit
mA
°C
Equivalent Schematic
+
+
_
_
2
REV. 1.0.1 9/29/00
PRODUCT SPECIFICATION
FAN4050
Guaranteed Electrical Characteristics, FAN4050-2.5
(T
A
= 25°C unless otherwise specified, in free air)
The
•
denotes specifications which apply over the full operating temperature range.
Parameter
Reverse Breakdown Voltage
Reverse Breakdown Voltage
Tolerance
Minimum Operating Current
I
RMIN
∆V
R
/∆T
Reverse Breakdown Voltage
Temperature Coefficient
∆V
R
(∆IK) Reverse Breakdown Voltage
Change with Operating
Current
Z
KA
Reverse Dynamic
Impedance
e
N
Wideband Noise
∆V
R
*Typical.
Symbol
V
R
TCV
R
Conditions
I
K
= 100µA
I
K
= 100µA
I
K
= 100µA
I
RMIN
≤
I
K
≤1mA
1mA
≤
I
K
≤
15mA
1mA
≤
I
K
≤
25mA
I
K
=1mA, f=120Hz, I
AC
=0.1I
K
•
•
•
•
•
A
2.500
±2.5
±11
65
±50
1.2
8.0
10
0.3
35
120
Limits
B
2.500
±5.0
±14
65
±50
1.2
8.0
10
0.3
35
120
Units
C
2.500
±13
±21
65
±50
1.2
8.0
10
0.3
35
120
V*
mV
mV
µA
ppm/°C
mV
mV
mV*
Ω*
µV
RMS
*
ppm*
I
K
=100µA,
10Hz
≤
f
≤
10kHz
Reverse Breakdown Voltage t=1000hrs, T=25°C, I
K
=100µA
Long-term Stability
Guaranteed Electrical Characteristics, FAN4050-3.3
(T
A
= 25°C unless otherwise specified, in free air)
The
•
denotes specifications which apply over the full operating temperature range.
Parameter
Reverse Breakdown Voltage
Reverse Breakdown Voltage
Tolerance
I
RMIN
Minimum Operating Current
∆V
R
/∆T
Reverse Breakdown Voltage
Temperature Coefficient
∆V
R
(∆IK) Reverse Breakdown Voltage
Change with Operating Current
Z
KA
e
N
∆V
R
*Typical.
Symbol
V
R
TCV
R
Conditions
I
K
= 100µA
I
K
= 100µA
I
K
= 100µA
•
•
•
Limits
Units
A
B
C
3.300 3.300 3.300
V*
±3.3
±6.6
±17
mV
±25
±28
±38
mV
70
70
70
µA
±50
±50
±50 ppm/°C
1.2
10
12
0.5
70
120
1.2
10
12
0.5
70
120
1.2
10
12
0.5
70
120
mV
mV
mV
Ω*
µV
RMS
*
ppm*
Reverse Dynamic Impedance
Wideband Noise
Reverse Breakdown Voltage
Long-term Stability
•
I
RMIN
≤
I
K
≤1mA
1mA
≤
I
K
≤
15mA
•
1mA≤ I
K
≤
25mA
I
K
=1mA, f=120Hz, I
AC
=0.1I
K
I
K
=100µA, 10Hz
≤
f
≤
10kHz
t=1000hrs, T=25°C, I
K
=100µA
REV. 1.0.1 9/29/00
3
FAN4050
PRODUCT SPECIFICATION
Mechanical Dimensions
SOT-23 Package
Inches
Min.
A
A1
B
c
D
E
e
e1
H
L
S
.035
.0004
.012
.003
.110
Max.
.044
.004
.020
.008
.120
Millimeters
Min.
Max.
Notes:
Notes
1. Dimensions are inclusive of plating.
2. Dimensions are exclusive of mold flash & metal burr.
3. Comply to JEDEC TO-236.
4. This drawing is for matrix leadframe only.
Symbol
.047
.055
.037 BSC
.075 BSC
.083
.104
.021 REF
.016 Nom
.89
1.12
.01
.10
.30
.50
.08
.20
2.80
3.04
1.20
1.40
.95 BSC
1.90 BSC
2.10
2.64
.54 REF
.395 Nom
D
e1
e
S
c
L
E
H
B
A1
A
4
REV. 1.0.1 9/29/00
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