
1/9
■ 1.225V TYP OUTPUT VOLTAGE
■ UL TRA LOW OPERA TING CURRENT : 65µA
maximum at 25°C
■ HIGH PRECISION @ 25°C
+/- 2%
+/- 1%
+/- 0.5%
■ HIGH STABILITY WHEN USED WITH
CAP AC ITIVE LOADS
■ INDUSTRIAL TEMPERA TURE RANGE:
-40 to +85°C
■ 150ppm/°C MAXIMUM TEMPERATURE
COEFFICIENT
DESCRIPTION
The TS4041 is a low power shunt voltage
reference providing a stable 1.225V output
voltage over the industrial temperature range (-40
to +85°C). Availabe in SOT23-3 surface mount
package, it can be designed in applications where
space saving is a critical issue.
The low operating current is a key advantage for
power restricted designs. In add ition, the TS40 41
is very stable and can be used in a broad range of
application conditions.
APPLICATION
■ Computers
■ Instrumentation
■ Battery chargers
■ Switch Mode Power Supply
■ Battery operated equipments
ORDER CODE
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT)
and Ammo Pack (AP)
LT = Tiny Package (SOT23-3) - only available in Tape & Reel (LT)
PIN CONNECTIONS (top view)
Precision TO92 SOT23-3
SOT23
Marking
2% TS4041EIZ-1.2 TS4041EILT-1.2 L233
1% TS4041DIZ-1.2 TS4041DILT-1.2 L232
0.5% TS4041CIZ-1.2 TS4041CILT-1.2 L231
Single temperature range: -40 to +85°C
Z
TO92
(Plastic Package)
L
SOT23-3L
(Plastic Micropacka ge)
TS4041
1.225V MICROPOWER SHUNT VOLTAGE REFERENCE
March 2002

TS4041
2/9
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
TS4041E (2% Precision) T
amb
= 25°C (unless otherwise specified)
Symbol Parameter Value Unit
I
k
Reverse Breakdown Current 20 mA
I
f
Forward Current 10 mA
P
d
Power Dissipation
1)
SOT23-3
TO92
360
625
mW
T
std
Storage Temperature -65 to +150 °C
ESD Human Body Model (HBM) 2 kV
Machine Model (MM) 200 V
T
lead
Lead Temperature (solde ring, 10 second s) 260 °C
1. Pd has been ca l culated with T
amb
= 25°C and Tj = 150°C an d
Rthj a = 200°C/W for the TO92 package
Rthja = 340°C/W for the SOT23-3L package
Symbol Parameter Value Unit
I
min
Minimum Operating Current 65
µ
A
I
max
Maximum Operating Current 12 mA
T
oper
Operating Free Air Temperature Range -40 to +85 °C
Symbol Parameter Test Condition Min. Typ. Max. Unit
Vk
Reverse Breakdown Voltage
I
k
= 100µA
1.200 1.225 1.250 V
Reverse Breakdown Voltage Tolerance
I
k
= 100µA
-40°C < T
amb
< +85°C
-25
-36
+25
+36
mV
I
kmin
Minimum Operating Current
T
amb
= 25°C
40 65
µ
A
-40°C < T
amb
< +85°C
70
∆
V
ref
/∆T
Average Temperature Coefficient
Ik = 100µA
150 ppm/°C
∆
V
k
/∆I
k
Reverse Breakdown Voltage Change
with Operating Current Range
I
kmin
< Ik < 1mA
-40°C < T
amb
< +85°C
0.3 2
2.5
mV
1mA < I
k
< 12mA
-40°C < T
amb
< +85°C
2.5 8
10
R
ka
Static Impedance
∆
I
k
= 45µA to 1mA
0.25 0.5
Ω
K
vh
Long Term Stability
I
k
= 100µA, t = 1000hrs
120 ppm
En Wide Band Noise
I
k
= 100µA 10Hz < f < 10kHz
200 nV/√Hz
Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.

TS4041
3/9
ELECTRICAL CHARACTERISTICS
TS4041D (1% Precision) T
amb
= 25°C (unless otherwise specified)
ELECTRICAL CHARACTERISTICS
TS4041C (0.5% Precision)T
amb
= 25°C (unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
Vk
Reverse Breakdown Voltage
I
k
= 100µA
1.213 1.225 1.237 V
Reverse Breakdown Voltage Tolerange
I
k
= 100µA
-40°C < T
amb
< +85°C
-12
-25
+12
+25
mV
I
kmin
Minimum Operating Current
T
amb
= 25°C
40 65
µ
A
-40°C < T
amb
< +85°C
70
∆
V
ref
/∆T
Average Temperature Coefficient
Ik = 100µA
150 ppm/°C
∆
V
k
/∆I
k
Reverse Breakdown Voltage Change
with Operating Current Range
I
kmin
< Ik < 1mA
-40°C < T
amb
< +85°C
0.3 2
2.5
mV
1mA < I
k
< 12mA
-40°C < T
amb
< +85°C
2.5 8
10
R
ka
Static Impedance
∆
I
k
= 45µA to 1mA
0.25 0.5
Ω
K
vh
Long Term Stability
I
k
= 100µA, t = 1000hrs
120 ppm
En Wide Band Noise
I
k
= 100µA 10Hz < f < 10kHz
200 nV/√Hz
Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
Symbol Parameter Test Condition Min. Typ. Max. Unit
Vk
Reverse Breakdown Voltage
I
k
= 100µA
1.219 1.225 1.231 V
Reverse Breakdown Voltage Tolerange
I
k
= 100µA
-40°C < T
amb
< +85°C
-6
-16
+6
+16
mV
I
kmin
Minimum Operating Current
T
amb
= 25°C
40 60
µ
A
-40°C < T
amb
< +85°C
65
∆
V
ref
/∆T
Average Temperature Coefficient
Ik = 100µA
120 ppm/°C
∆
V
k
/∆I
k
Reverse Breakdown Voltage Change
with Operating Current Range
I
kmin
< Ik < 1mA
-40°C < T
amb
< +85°C
0.3 1.5
2
mV
1mA < I
k
< 12mA
-40°C < T
amb
< +85°C
2.5 6
8
R
ka
Static Impedance
∆
I
k
= 45µA to 1mA
0.25 0.5
Ω
K
vh
Long Term Stability
I
k
= 100µA, t = 1000hrs
120 ppm
En Wide Band Noise
I
k
= 100µA 10Hz < f < 10kHz
200 nV/√Hz
Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.

TS4041
4/9
Reference voltage versus catho de current
Test circuit
Static impedance versus temperatu re
Reference voltage versus cathode current
Reference voltage versus Temperature
Noise voltage versus frequency
-1
-0.5
00.51
1.5
Reference voltage (V)
-8
-4
0
4
8
12
Cathode current (mA)
Ik=(Vin-Vref)/R
Vout=Vr ef
R
-40-200 20406080
Temperature ( °C )
0.2
0.21
0.22
0.23
0.24
0.25
Static impedance (Ohms)
-1
-0.5
0
0.5
1
1.5
Reference voltage (V)
-50
0
50
100
Cathode current (µA)
-40-200 20406080
T emperature (°C)
1.19
1.2
1.21
1.22
1.23
1.24
1.25
1.26
Cathode volta ge (V)
+0.5
-0.5%
-1%
+1%
-2 %
+2%
0 1 10 100 1,000 10,000
Frequency (kHz)
0
200
400
600
800
Noise voltage (nV/Hz)
CL=10µF
CL=0µF
CL=100µF

TS4041
5/9
Pulse response for Ik=100µA
Pulse response for Ik=1mA
Test circuit for pulse response at Ik=100µA
Test circuit for pulse response at Ik=1mA
0246810
Time (µs)
3V
0V
1.225V
Input
Output
0V
024681
Time (µs)
3V
0V
1.225V
Input
Output
0V
Ik=100µA
Output
18 K
Ω
Pulse
Gen erator
Intput
Ik=1mA
Output
1.8 K
Ω
Pulse
Generator
Intput

TS4041
6/9
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92 (TAPE & REEL)
Dim.
Millimeters Inches
Min Typ. Max. Min. Typ. Max.
AL 5.0 0.197
A 5.0 0.197
T 4.0 0.157
d 0.45 0.018
I1 2.5 0.098
P 11.7 12.7 13.7 0.461 0.500 0.539
PO 12.4 12.7 13 0.488 0.500 0.512
P2 5.95 6.35 6.75 0.234 0.250 0.266
F1/F2 2.4 2.5 2.8 0.094 0.098 0.110
∆
h -1 0 1 -0.039 0 0.039
∆
P -1 0 1 -0.039 0 0.039
W 17.5 18.0 19.0 0.689 0.709 0.748
W0 5.7 6 6.3 0.224 0.236 0.248
W1 8.5 9 9.75 0.335 0.354 0.384
W2 0.5 0.020
H 20 0.787
H0 15.5 16 16.5 0.610 0.630 0.650
H1 25 0.984
DO 3.8 4.0 4.2 0.150 0.157 0.165
L1 11 0.433
A1
P
P
A
T
H
H1
H
L1
d
I1
H0
W2W0
W1
W
D0
F1
F2
P2
P0

TS4041
7/9
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92 (TAPE AMMO PACK)
Dim.
Millimeters Inches
Min Typ. Max. Min. Typ. Max.
AL 5.0 0.197
A 5.0 0.197
T 4.0 0.157
d 0.45 0.018
I1 2.5 0.098
P 11.7 12.7 13.7 0.461 0.500 0.539
PO 12.4 12.7 13 0.488 0.500 0.512
P2 5.95 6.35 6.75 0.234 0.250 0.266
F1/F2 2.4 2.5 2.8 0.094 0.098 0.110
∆
h -1 0 1 -0.039 0 0.039
∆
P -1 0 1 -0.039 0 0.039
W 17.5 18.0 19.0 0.689 0.709 0.748
W0 5.7 6 6.3 0.224 0.236 0.248
W1 8.5 9 9.75 0.335 0.354 0.384
W2 0.5 0.020
H 20 0.787
H0 15.5 16 16.5 0.610 0.630 0.650
H1 25 0.984
DO 3.8 4.0 4.2 0.150 0.157 0.165
L1 11 0.433
A1
P
P
A
T
H
H1
H
L1
d
I1
H0
W2W0
W1
W
D0
F1
F2
P2
P0

TS4041
8/9
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92 (BULK)
Dim.
Millimeters Inches
Min Typ. Max. Min. Typ. Max.
L 1.27 0.05
B 3.2 3.7 4.2 0.126 0.1457 0.1654
O1 4.45 5.00 5.2 0.1752 0.1969 0.2047
C 4.58 5.03 5.33 0.1803 0.198 0.2098
K 12.7 0.5
O2 0.407 0.5 0.508 0.016 0.0197 0.02
a 0.35 0.0138

TS4041
9/9
PACKAGE MECHANICAL DATA
3 PINS - TINY PACKAGE (SOT23)
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.890 1.120 0.035 0.044
A1 0.010 0.100 0.0004 0.004
A2 0.880 0.950 1.020 0.037 0.040
b 0.300 0.500 0.012 0.020
c 0.080 0.200 0.003 0.008
D 2.800 2.900 3.040 0.110 0.114 0.120
E 2.100 2.640 0.083 0.104
E1 1.200 1.300 1.400 0.047 0.051 0.055
e 0.950 0.037
e1 1.900 0.075
L 0.400 0.500 0.600 0.016 0.020 0.024
L1 0.540 0.021
k 0° 8°
A
A1
A2
D
e
e1
b
E
E1
0.10
C
C
SEATING
PLANE
L1
L
0.25
GAUGE
PLANE
c
k
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previously supplied. STMicroelectronic s products are not authoriz ed for use as critical c omponents in life support dev ices or
systems without express written approval of STMicroelectronics.
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