TS824-1.2
HIGH THERMAL STABILITY
MICROPOWER SHUNT VOLTAGE REFERENCE
s
LOW Tc: 50 ppm/°C MAXIMUM
s
1.225V OUTPUT VOLTAGE
s
LOW OPERATING CURRENT: 45µA max @
25°C
s
HIGH PRECISION AT 25°C: ±1%
s
STABLE WHEN USED WITH CAPACITIVE
LOADS
s
INDUSTRIAL TEMPERATURE RANGE:
-40 to +85°C
DESCRIPTION
The TS824 is a low power shunt voltage reference
featuring a very low temperature coefficient of
50ppm/°C as a maximum value. Providing 1.225V
output voltage, the TS824 operates over the
industrial temperature range (-40 to +85°C). Ideal
for battery-powered equipments where power
conservation is critical, the TS824 is housed in a
tiny SOT23-3 package allowing space saving.
The TS824 is typically stable with any capacitive
loads within the entire temperature range. The
product is thus easy to use and the design simpli-
fied.
APPLICATION
L
SOT23-3L
(Plastic Micropackage)
PIN CONNECTIONS (top
view)
s
s
s
s
Instrumentation,
Data acquisition systems,
Portable, Battery powered equipments
Power management
ORDER CODE
Voltage
Precision
SOT23-3
SOT23
Marking
L251
1.225V
1%
TS824ILT-1.2
Single temperature range: -40 to +85°C
LT =
Tiny Package (SOT23-3) - only available in Tape & Reel (LT)
March 2002
1/5
TS824-1.2
ABSOLUTE MAXIMUM RATINGS
Symbol
I
K
I
F
P
D
T
Std
TJ
T
Lead
ESD
Parameter
Reverse Breakdown Current
Forward Current
Power Dissipation (note 1)
Storage Temperature
Junction Temperature
Lead Temperature (soldering, 10 seconds)
Human Body Model (HBM) (note 2)
Machine Model (MM) (note 2)
SOT23-3
Value
20
10
360
-65 to +150
+150
+260
2
200
Unit
mA
mA
mW
°C
°C
°C
kV
V
Note 1:
The maximum power dissipation must be derated at high temperature. It can be calculated using T
JMAX
(maximum junction tem-
perature), R
THJA
(Thermal resistance junction to ambient) and T
A
(Ambient temperature). The maximum power dissipation formula at any
temperature is P
DMAX
= (T
JMAX
- T
A
) / R
THJA.
R
THJA
is 340°C/W for the SOT23-3 package.
Note 2:
The Human Body Model (HBM) is defined as a 100pF capacitor discharge through a 1.5kΩ resistor into each pin.
The Machine Mode (MM) is defined as a 200pF capacitor discharge directly into each pins.
OPERATING CONDITIONS
Symbol
I
min
I
max
T
oper
Minimum Operating Current
Maximum Operating Current
Operating Free Air Temperature Range
Parameter
Value
40
12
-40 to +85
Unit
µA
mA
°C
ELECTRICAL CHARACTERISTICS (note 3)
T
amb
= 25°C (unless otherwise specified)
Symbol
V
K
Parameter
Reverse Breakdown Voltage
Reverse Breakdown Voltage Tolerance
Minimum Operating Current
Average Temperature Coefficient
(note 4)
Reverse Breakdown Voltage Change
with Operating Current Range
Test Condition
I
K
= 100µA
I
K
= 100µA
-40°C < T
amb
< +85°C
T
amb
= 25°C
-40°C < T
amb
< +85°C
I
K
= 100µA
I
KMIN
< I
K
< 1mA
-40°C < T
amb
< +85°C
1mA < I
K
< 12mA
-40°C < T
amb
< +85°C
∆I
K
= I
KMIN
to 1mA
-40°C < T
amb
< +85°C
∆I
K
= 1mA to 12mA
-40°C < T
amb
< +85°C
I
K
= 100µA, t = 1000hrs
I
K
= 100µA
100Hz < f < 10kHz
0.3
2.5
0.3
0.25
120
200
Min.
1.213
-12
-16
40
Typ.
1.225
Max.
1.237
+12
+16
45
50
50
1
1.5
8
10
1
1.5
0.7
0.9
Unit
V
mV
µA
ppm/°C
I
KMIN
∆V
K
/∆T
∆V
K
/∆I
K
mV
R
KA
Static Impedance
Ω
K
VH
E
N
Long Term Stability
Wide Band Noise
ppm
nV/√Hz
Note 3:
Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
Note 4:
The total tolerance within the industrial range, where the maximum
∆T
versus 25°C is 65°C, is explained hereafter:
±
1 % + (± 50 ppm/°C x 65°C) =
±
1.325 %
2/5
TS824-1.2
Reference voltage versus cathode current
1.5
Reference voltage versus cathode current
1.5
Reference voltage (V)
1.0
T = +25°C
0.5
Reference voltage (V)
1.0
T=+85°C
0.5
T=+25°C
T=-40°C
0.0
-0.5
-1.0
-10
0.0
-5
0
5
10
0
25
50
75
100
Cathode current (mA)
Cathode current (µA)
Test circuit
Reference voltage versus Temperature
1.240
R
i=0
Cathode voltage (V)
1.235
1.230
1.225
1.220
1.215
1.210
-40
-20
0
20
40
60
80
I
K
=(V
IN
-V
REF
)/R
V
OUT
=V
REF
V
IN
Temperature (°C)
Static impedance for Ik < 1mA
Static impedance for Ik < 1mA (
Ω
)
Static impedance for Ik > 1mA
Static impedance for Ik > 1mA (
Ω
)
0.9
1.5
1.0
0.6
0.5
0.3
0.0
-40
-20
0
20
40
60
80
0.0
-40
-20
0
20
40
60
80
Temperature (°C)
Temperature (°C)
3/5
TS824-1.2
Start-Up characteristics with low Ik (100µA)
4
Start-Up schematic with low Ik (100µA)
Input signal
18K
Ω
Ik=100µA
Voltage (V)
Voltage reference
0
0
5
10
15
20
Time (µs)
Noise versus frequency
300
T = +25°C
Noise (nV /
√
Hz)
200
100
0
0.1
1
10
100
1000
10000
Frequency (kHz)
4/5
Output
Intput
2
Pulse
G
enerator
TS824-1.2
PACKAGE MECHANICAL DATA
3 PINS - TINY PACKAGE (SOT23-3)
D
e
GAUGE
PLANE
0.25
k
L
E1
E
b
c
e1
C
A2
Millimeters
Dimensions
Min.
A
A1
A2
b
c
D
E
E1
e
e1
L
L1
k
0.890
0.010
0.880
0.300
0.080
2.800
2.100
1.200
Typ.
Max.
1.120
0.100
1.020
0.500
0.200
3.040
2.640
1.400
Min.
0.035
0.0004
A1
A
0.10
SEATING
PLANE
C
L1
Inches
Typ.
Max.
0.044
0.004
0.040
0.020
0.008
0.120
0.104
0.055
0.950
0.037
0.012
0.003
0.110
0.083
0.047
2.900
1.300
0.950
1.900
0.500
0.540
0.114
0.051
0.037
0.075
0.020
0.021
0.400
0°
0.600
8°
0.016
0.024
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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© 2002 STMicroelectronics - Printed in Italy - All Rights Reserved
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