TS4040
2.5V micropower shunt voltage reference
Features
■
2.5V output voltage
■
Ultra low current consumption: 40µA typ.
■
High precision @ 25°C: ±2% and ±1%
■
High stability when used with capacitive loads
■
Industrial temperature range:-40°C to +85°C
■
150ppm/°C maximum temperature coefficient
L
SOT23-3L
(Plastic micropackage)
Applications
■
Computers
■
Instrumentation
■
Battery chargers
■
Switch mode power supply
■
Battery operated equipments
Pin connections
(Top view)
Description
The TS4040 is a low power shunt voltage
reference providing a stable 2.5V output voltage
over the industrial temperature range (-40°C to
+85°C). Available in SOT23-3 surface mount
package, it can be designed in applications where
space saving is critical.
The low operating current is a key advantage for
power restricted designs. In addition, the TS4040
is very stable and can be used in a broad range of
application conditions.
August 2007
Rev 2
1/9
www.st.com
9
Absolute maximum ratings and operating conditions
1
TS4040
Absolute maximum ratings and operating conditions
Table 1.
Absolute maximum ratings (AMR)
Symbol
Parameter
Value
Unit
Ik
Reverse breakdown current
20
mA
If
Forward current
10
mA
360
mW
-65 to +150
°C
2
kV
Machine model (MM)
200
V
Lead temperature (soldering, 10 seconds)
260
°C
(1)
Pd
Power dissipation
Tstg
Storage temperature
ESD
Human body model
SOT23-3
(HBM)(2)
(3)
Tlead
1. Pd is calculated with Tamb = 25°C, Tjunction =150°C and Rthja = 340°C/W for the SOT23-3 package.
2. Human body model: 100pF discharged through a 1.5kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
3. Machine model: a 200pF cap is charged to the specified voltage, then discharged directly between two pins
of the device with no external series resistor (internal resistor < 5Ω), done for all couples of pin
combinations with other pins floating.
Table 2.
Symbol
2/9
Operating conditions
Parameter
Value
Unit
Ik-min
Minimum operating current
65
μA
Ik-max
Maximum operating current
15
mA
Toper
Operating free air temperature range
-40 to +85
°C
TS4040
Electrical characteristics
2
Electrical characteristics
Table 3.
TS4040E (2% precision) Tamb = 25°C (1) (unless otherwise specified)
Symbol
Vk
Ik-min
ΔVref/ΔT
ΔVk/ΔIk
Parameter
Test conditions
Min.
Typ.
Max.
Unit
2.5
2.55
V
50
74
mV
Reverse breakdown voltage
Ik = 100μA
2.45
Reverse breakdown voltage tolerance
Ik = 100μA
-40°C < Tamb < +85°C
-50
-74
Minimum operating current
T = 25°C
-40°C < Tamb < +85°C
40
65
70
μA
Average temperature coefficient
Ik = 100μA
30
150
ppm/°C
Ik-min < Ik < 1mA
-40°C < Tamb < +85°C
0.4
1
1.2
1mA < Ik < 15mA
-40°C < Tamb < +85°C
2.5
8
10
Ik = Ik-min to 1mA
-40°C < Tamb < +85°C
0.4
1
1.2
Ik = 1 to 15mA
-40°C < Tamb < +85°C
0.2
0.6
0.7
Reverse breakdown voltage change
with operating current range
mV
Ω
Rka
Reverse static impedance
Kvh
Long term stability
Ik = 100μA, t = 1000hrs
120
ppm
En
Wide band noise
Ik = 100μA 10Hz < f < 10kHz
35
nV/√Hz
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
Table 4.
Symbol
TS4040D (1% precision) Tamb = 25°C (1) (unless otherwise specified)
Parameter
Test conditions
Min.
Typ.
Max.
Unit
2.475
2.5
2.525
V
25
49
mV
Reverse breakdown voltage
Ik = 100μA
Reverse breakdown voltage tolerance
Ik = 100μA
-40°C < Tamb < +85°C
Minimum operating current
T = 25°C
-40°C < Tamb < +85°C
40
65
70
μA
ΔVref/ΔT
Average temperature coefficient
Ik = 100μA
30
150
ppm/°C
ΔVk/ΔIk
Ik-min < Ik < 1mA
-40°C < Tamb < +85°C
0.4
Reverse breakdown voltage change
with operating current range
1
1.2
Vk
Ik-min
-25
-49
mV
1mA < Ik < 15mA
-40°C < Tamb < +85°C
2.5
8
10
Ik = Ik-min to 1mA
-40°C < Tamb < +85°C
0.4
1
1.2
Ik = 1mA to 15mA
-40°C < Tamb < +85°C
0.2
0.6
0.7
Ω
Rka
Reverse static impedance
Kvh
Long term stability
Ik = 100μA, t = 1000hrs
120
ppm
En
Wide band noise
Ik = 100μA 10Hz < f < 10kHz
35
nV/√Hz
1. Limits are 100% production tested at 25°C. Behavior at the temperature range limits is guaranteed through correlation and
by design.
3/9
Electrical characteristics
Figure 1.
TS4040
Reference voltage versus cathode
current
Figure 2.
Minimum operating current
Reference voltage versus cathode current
Minimum operating current
3
2.5
Cathode voltage (V)
Cathode current (mA)
15
10
5
0
T=+25°C
2
T=+85°C
1.5
T=-40°C
1
0.5
0
-5
-0.5
0
0.5
1
1.5
2
0
2.5
20
Cathode voltage (V)
Figure 3.
40
Cathode current (µA)
Test circuit
Figure 4.
Reference voltage versus
temperature
2.58
Test circuit
+2%
R
Ik=(Vin-Vref)/R
Vout=Vref
Vin
Cathode voltage (V)
2.56
2.54
+1%
2.52
2.5
2.48
-1%
2.46
-2%
2.44
2.42
-40
-20
0
20
40
60
80
Temperature (°C)
Figure 5.
Static impedance Rka versus
temperature
Figure 6.
Noise voltage versus frequency
Noise voltage versus Frequency
Static impedance (Rka) versus
temperature
1500
Noise voltage (nV/VHz)
Static impedance (Ohms)
0.2
0.15
0.1
0.05
0
-40
CL=10µF
1000
CL=1µF
500
CL=100nF
CL=0
0
-20
0
20
40
Temperature (°C)
4/9
CL=100µF
60
80
0.1
1000.0
10.0
1.0
100.0
Frequency (KHz)
TS4040
Electrical characteristics
Figure 7.
Test circuit for pulse response at
Ik=100µA
Pulse response for Ik=100µA
Figure 8.
Pulse response for Ik=100µA
Test circuit for pulse response at Ik=100µA
5
25k ohm
Ik=100µA
Intput
Pulse
Generator
Output
Input
0
2.5
Output
0
0
5
10
15
20
Time (µs)
Figure 9.
Test circuit for pulse response at
Ik=100µA (detailed part)
Figure 10. Test circuit for pulse response at
Ik=100µA (detailed part)
Pulse response for Ik=100µA
Detailed part
Pulse response for Ik=100µA
Detailed part
5V
5V
Input
Input
0V
2.5V
0V
2.5V
Output
Output
0V
0V
0
0.5
1
1.5
2
0
1
2
Time (µs)
3
4
5
Time (µs)
Figure 11. Test circuit for pulse response at
Ik=1mA
Figure 12. Pulse response at Ik=1mA
Pulse response for Ik=1mA
Test circuit for pulse response at Ik=1mA
5V
2.5k ohm
Input
Output
Pulse
Generator
Intput
Ik=1mA
0V
2.5V
Output
0V
0
1
2
3
4
5
Time (µs)
5/9
Package information
TS4040
Figure 13. Test circuit for pulse response at
Ik=1mA (detailed part)
Figure 14. Test circuit for pulse response at
Ik=1mA (detailed part)
Pulse response for Ik=1mA
Detailed part
Pulse response for Ik=1mA
Detailed part
5V
5V
Input
Input
0V
2.5V
0V
2.5V
Output
Output
0V
0V
0
50
100
150
200
Time (ns)
3
0
0.2
0.4
0.6
Time (µs)
0.8
1
Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in
ECOPACK® packages. These packages have a lead-free second level interconnect. The
category of second level interconnect is marked on the package and on the inner box label,
in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics
trademark. ECOPACK specifications are available at: www.st.com.
6/9
TS4040
Package information
Figure 15. SOT23-3 package mechanical data
Dimensions
Ref.
Millimeters
Min.
Typ.
Mils
Max.
Min.
Typ.
Max.
A
0.890
1.120
35.05
44.12
A1
0.010
0.100
0.39
3.94
A2
0.880
1.020
34.65
b
0.300
0.500
11.81
19.69
C
0.080
0.200
3.15
7.88
D
2.800
3.040
110.26
E
2.100
2.64
82.70
E1
1.200
1.400
47.26
0.950
2.900
1.300
37.41
114.17
51.19
0.950
37.41
e1
1.900
74.82
0.400
L1
k
0.600
15.75
0.540
0°
119.72
103.96
e
L
40.17
55.13
23.63
21.27
8°
0°
8°
7110469/A
7/9
Ordering information
4
TS4040
Ordering information
Table 5.
Order codes
Part number
Precision
TS4040EILT-2.5
2%
TS4040DILT-2.5
5
Package
Packing
-40°C to +85°C
SOT23-3
Tape & reel
Marking
L243
1%
L242
Revision history
Table 6.
8/9
Temperature
range
Document revision history
Date
Revision
Changes
14-Mar-2002
1
Initial release.
20-Aug-2007
2
Removed TO-92 package information.
Format update.
TS4040
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