ETC AS4040BS-2

AS4040
Precision Micropower 2.5V Shunt Voltage Reference
FEATURES
APPLICATIONS
• Low temperature coefficient 100 ppm/°C
• Operating current range 100µA to 15 mA
• Low power, 250 mW @ Iin=100 mA
• Two terminal "Zener" operation
• Small package: SOT - 23, TO-92, and SO-8
• Fixed reverse breakdown voltage 2.5 Volt
• No output capacitance required
• Similar replacement for LM4040
• Constant Current Source
• Digital Voltmeter
• Power Supply Monitor
• Precision Regulators
• Battery-Powered Equipment
• Instrumentation
• Automotive Electronics
• Data Acquisition Systems
• Energy Management
PRODUCT DESCRIPTION
The AS4040 is a two-terminal, temperature compensated, band-gap voltage reference, which provides a fixed 2.5V output for input
currents between 100 µA to 15mA. The bandgap voltage (2.5V) is independently trimmed from the output voltage to achieve a very
low tempco. This trimming technique process gives a very stable device over the full temperature range (A grade 50 ppm/ °C). The
AS4040 is available in the sub-miniature (3mm × 1.3mm) SOT-23, SO-8 surface mount package, or TO-92 package. The operating
temperature is -40°C to 85°C.
The AS4040 advanced design eliminates the need for an external stabilized capacitor while insuring stability with any capacitive load,
making them easy to use.
ORDERING INFORMATION
Part Number
AS4041YN-X
AS4041YS-X
AS4041YM-X
Temperature Coef.
Package Type
TO-92
SO-8
SOT-23
Output Accuracy
Y= A=100ppm/°C
B=150ppm/°C
X=
Note: Consult factory for lower tempco and tolerance.
1=0.5%
2=1%
3=2%
Reverse Breakdown Voltage
2.5 = 2.5V
5.0 = 5.0V
V=
PIN CONNECTIONS
8-Pin Surface Mount (S)
N/C
1
8
+
N/C
2
7
N/C
N/C
-
3
6
N/C
4
5
N/C
TO-92 (N)
SOT-23-3 (M)
+
1
2
2
3
1
-
Bottom View
3
Top View
Top View
Rev. 10/11/00
AS4040
ABSOLUTE MAXIMUM RATINGS
Reverse Current................................................................20mA
Forward Current ...............................................................10mA
Storage Temperature ...................................... -65°C to +150°C
Lead Temperature (Soldering) ........................................ 300°C
Power Dissipation at 25°C
M Package ...................................................... 300mW
N Package ....................................................... 550mW
S Package........................................................ 525mW
Temperature Range ................................... -40°C ≤ TA ≤ +85°C
ELECTRICAL CHARACTERISTICS (AS4040-2.5V)
Electrical Characteristics at IIN = 1000µA, and TA = +25°C unless otherwise noted. . Boldface limits apply over temperature
AS4040A-2
AS4040B-2
Units
Parameters
Conditions
Min
Typ
Max
Min
Typ
Max
Reverse Breakdown
Voltage
Reverse Breakdown
Tolerance
Output Impedance
Noise Voltage
Tempco
Turn-on Setting
Operating Current Range
Temp. Range
2.500
IR=500 µA
IR=500 µA
0.1KHz≤f ≤10Hz
Note 1
0.1% of VOUT
Note 2
Parameters
Conditions
Reverse Breakdown
Voltage
Reverse Breakdown
Tolerance
Output Impedance
Noise Voltage
Tempco
Turn-on Setting
Operating Current Range
Temp. Range
IR=500 µA
0.60
15
±25
±49
2
0.60
15
50
V
±25
±49
2
100
30
30
0.1
15
0.1
15
-40
85
-40
85
AS4040A-3
Min
Typ
Max
AS4040B-3
Min
Typ
Max
2.500
2.500
mV
mV
Ω
µV p-p
ppm/°C
µSec
mA
°C
Units
V
0.1
15
0.1
15
mV
mV
Ω
µV p-p
ppm/°C
µSec
mA
-40
85
-40
85
°C
IR=500 µA
0.1KHz≤f ≤10Hz
Note 1
0.1% of VOUT
Note 2
2.500
0.60
15
±50
±74
2
0.60
15
50
±50
±74
2
100
30
30
Rev. 10/11/00
AS4040
ELECTRICAL CHARACTERISTICS (AS4040-5.0V)
Electrical Characteristics at IIN = 1000µA, and TA = +25°C unless otherwise noted. . Boldface limits apply over temperature
AS4040A-1
AS4040B-1
AS4040C-1
Parameters
Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Reverse Breakdown
Voltage
Reverse Breakdown
tolerance
Output Impedance
IR=500 µA
Noise Voltage
Tempco
Turn-on Setting
Operating Current
Range
Temp. Range
0.1KHz≤f ≤10Hz
Note 1
0.1% of VOUT
Note 2
Parameters
Conditions
Reverse Breakdown
Voltage
Reverse Breakdown
Tolerance
Output Impedance
Noise Voltage
Tempco
Turn-on Setting
Operating Current
Range
Temp. Range
IR=500 µA
Parameters
Conditions
Reverse Breakdown
Voltage
Reverse Breakdown
Tolerance
Output Impedance
Noise Voltage
Tempco
Turn-on Setting
Operating Current
Range
Temp. Range
IR=500 µA
Note:
5.000
IR=500 µA
0.60
0.3
15
0.60
0.3
15
5.000
±24
±58
2
1.1
0.60
0.3
15
150
30
V
150
30
30
15
0.175
15
0.175
15
-40
85
-40
85
-40
85
Min
AS4040A-2
Typ
Max
Min
5.000
0.60
15
AS4040B-2
Typ
Max
Min
5.000
±50
±98
2
0.60
15
50
AS4040C-2
Typ
Max
±50
±98
2
0.60
15
±50
±98
2
150
30
30
15
0.175
15
0.175
15
-40
85
-40
85
-40
85
AS4040A-3
Typ
Max
Min
5.000
°C
Units
V
0.175
Min
µV p-p
ppm/°C
µSec
mA
5.000
100
30
mV
mV
Ω
±24
±58
2
1.1
0.175
AS4040B-3
Typ
Max
Min
5.000
AS4040C-3
Typ
Max
mV
mV
Ω
µV p-p
ppm/°C
µSec
mA
°C
Units
5.000
V
0.175
15
0.175
15
0.175
15
mV
mV
Ω
µV p-p
ppm/°C
µSec
mA
-40
85
-40
85
-40
85
°C
IR=500 µA
0.1KHz≤f ≤10Hz
Note 1
0.1% of VOUT
Note 2
±24
±58
2
0.9
100
IR=500 µA
0.1KHz≤f ≤10Hz
Note 1
0.1% of VOUT
Note 2
5.000
Units
0.60
15
±100
±148
2
0.60
15
50
±100
±148
2
0.60
15
100
30
±100
±148
2
150
30
30
1) Three-point measurement guarantees the error band over the specified temperature range.
2) Optimum performance is obtained at currents below 1000 µA.
3) Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation using statistical quality control.
Rev. 10/11/00
AS4040
AS4040 Applications Hints
This device is designed for stable operation and has no need
of an external capacitor between pin 4 and 8. The reference
remains stable if a bypass capacitor is used.
Figure 1. AS4040 Fixed
Shunt Regulator Application
SOT-23
The AS4040 in the SOT-23 package has a parasitic Schottky
diode between pin 3 and pin 1. Pin 1 of SOT-23 must float
or be connected to pin 3.
Conventional Shunt Regulator
In a conventional shunt regulator application (see Figure 1),
an external series resister (RS) is connected between the
supply voltage and the AS4040. RS determines the current
that flows through the load (IL) and the reference(IQ). Since
load current and supply voltage may vary, RS should be small
enough to supply at least the minimum acceptable IQ to the
reference even when the supply voltage is at its minimum and
the load current is at its maximum value. When the supply
voltage is at its maximum and IL is at its minimum, RS should
be large enough so that the current flowing through the
AS4040 is less than 15mA
VS
RS
I O + IL
IL
VR
AS4040
VO
IQ
RS is determined by the supply voltage (VS), the load and
operating current (IL and IQ), reference’s reverse breakdown
voltage (VR).
RS = (VS - VR)/(IL+IQ)
Rev. 10/11/00
AS4040
PACKAGE DRAWING
8-PIN SOIC (S)
4.0 (0.158)
3.8 (0.150)
5.2 (0.205)
4.6 (0.181)
6.2 (0.244)
5.8 (0.228)
Pin 1
1.27 (0.50)
BSC
1.75 (0.069)
1.35 (0.053)
0.78 (0.031)
0.61 (0.024)
5.0 (0.197)
4.8 (0.188)
0.37 (0.015)
BSC
45°
0.77 (0.030)
0.64 (0.025)
7 °(4 PLCS)
3°-6°
0.56 (0.022)
0.49 (0.019)
0.45 (0.018)
0.35 (0.014)
0.20 (0.008)
0.10 (0.004)
0.22 (0.009)
0.19 (0.007)
7 °(4 PLCS)
Rev. 10/11/00
AS4040
DRAWING PACKAGE
SOT-23-3L (M)
0.015 - 0.018
(0.381 - 0.457)
0.047 - 0.055 0.083 - 0.098
(1.194 - 1.397) (2.108 - 2.489)
0.035 - 0.040
(0.889 - 1.016)
0.020 - 0.024
(0.508 - 0.610)
0.070 - 0.080
(1.778 - 2.032)
0.110 - 0.120
(2.794 - 3.048)
0.001 - 0.004
(0.025 - 0.102)
0.003 - 0.005
(0.076 - 0.127)
0.030 - 0.041
(0.762 - 1.041)
0.018 - 0.024
(0.457 - 0.610)
Rev. 10/11/00
AS4040
PACKAGE DRAWING
TO-92 (N)
0.090 (2.286) Radius typ.
2
1
3
0.145 (3.683)
0.135 (3.429)
0.055 (1.397)
0.045 (1.143)
10° typ.
BOTTOM VIEW
0.185 (4.699)
0.045 (1.143)
0.085 (2.159) Diameter
5° typ.
0.185 (4.699)
0.175 (4.445)
0.090 (2.286) typ.
5° typ.
Seating Plane
0.025 (0.635) Max
Uncontrolled
Lead Diameter
0.500 (12.70) Min.
0.016 (0.406)
0.014 (0.356)
0.0155 (0.3937)
0.0145 (0.3683)
0.055 (1.397)
0.045 (1.143)
0.105 (2.667)
0.095 (2.413)
Rev. 10/11/00