ETC ZRA12503

PRECISION 1.25 VOLT
MICROPOWER VOLTAGE REFERENCE
ZRA125
ISSUE 2 - FEBRUARY 1997
DEVICE DESCRIPTION
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The ZRA125 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 1.25 volts. The device is available
in small outline surface mount packages, ideal
for applications where space saving is
important, as well as packages for through hole
requirements.
The ZRA125 design provides a stable voltage
without an external capacitor and is stable with
capacitive loads. The ZRA125 is recommended
for operation between 50µA and 5mA and so
is ideally suited to low power and battery
powered applications.
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FEATURES
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Typical slope resistance 0.65Ω
± 3%,2% and 1% tolerance
Industrial temperature range
Operating current 50µA to 5mA
Transient response, stable in less than 10µs
Optional extended current range
APPLICATIONS
Excellent performance is maintained to a
suggested absolute maximum of 25mA,
however the rugged design and 20 volt
processing allows the reference to withstand
transient effects and currents up to 200mA.
Superior switching capability allows the device
to reach stable operating conditions in only a
few microseconds.
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Typical TC 30ppm/°C
Small outline SOT23, SO8 and TO92 style
packages
No stabilising capacitor required
SCHEMATIC DIAGRAM
V
R
G nd
1 - 24
Battery powered and portable equipment.
Metering and measurement systems.
Instrumentation.
Data acquisition systems.
Precision power supplies.
Test equipment.
ZRA125
ZRA125
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
CONDITIONS
Reverse Breakdown Voltage IR=150µA
IMIN
Minimum Operating Current
IR
Recommended Operating
Current
TC †
Average Reverse
Breakdown Voltage Temp.
Co.
TOL.
%
MIN
TYP MAX
1.228
1.225
1.21
1.24 1.252
1.25 1.275
1.25 1.29
30
0.05
UNITS
1.4
1.27
1.2
1.26
1.0
0.8
0.6
0.4
V
IR=150µA to 5mA
1.25
1.24
1.23
1.22
1.21
0.2
1
2
3
0.1
1
10
100
-40
1000
-20
0
50
µA
5
mA
20
40
60
80
Temperature (°C)
Forward Current (mA)
Forward Characteristics
Temperature Drift
1000
30
IR(min) to
IR(max)
90
ppm/°C
RS §
Slope Resistance
0.65 2
Ω
ZR
Reverse Dynamic Impedance IR = 1mA
f = 100Hz
IAC= 0.1 IR
0.5
Ω
EN
Wideband Noise Voltage
40
IR = 150µA
f = 100Hz to
10kHZ
1
1.0
100
Slope resistance (Ω)
VR
LIMITS
Slope resistance (Ω)
SYMBOL PARAMETER
TYPICAL CHARACTERISTICS
Power Dissipation (Tamb=25°C)
SOT23
330mW
E-Line, 3 pin (TO92)
500mW
E-Line, 2 pin (TO92)
500mW
SO8
625mW
25mA
25mA
-40 to 85°C
-55 to 125°C
Forward Voltage (V)
Reverse Current
Forward Current
Operating Temperature
Storage Temperature
Reference voltage (V)
ABSOLUTE MAXIMUM RATING
TA=-40°C
TA=25°C
0.5
TA =85°C
IR=150µA
10
IR=1mA
IR=5mA
1
0.1
0.01
0
0.1
µV(rms)
1
0.1
10
1
10
100
Frequency (kHz)
Reference Current (mA)
Slope Resistance v Current
Slope Resistance v Frequency
1.5
1.5
INPUT
58K
0.5
40
V - (V)
V - (V)
1.0
R
1.0
INPUT
R
1 K8
O UTPUT
0.5
O UTPUT
30
C
5°
A=
2
5
°C
T
10
A=
0
-4
°C
NI
T
0
0
10
10
- (V)
=8
TA
20
NI
0
V
VR Change (IR (min) to IR (max))
RS =
IR (max) − IR (min)
50
- (V)
§
VR Change x 1000000
VR x Temperature Change
V
† TC =
Reverse Current (µA)
60
0
0
0
0.2
0.4
0.6
0.8
1.0
1.2
Reverse Voltage (V)
Reverse Characteristics
1 - 45
1.4
0
1
2
3
4
0
Time (µs)
2
4
6
Time (µs)
Transient Response (IR=5mA)
µA)
Transient Response (IR=150µ
1 - 26
8
ZRA125
ZRA125
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
CONDITIONS
Reverse Breakdown Voltage IR=150µA
IMIN
Minimum Operating Current
IR
Recommended Operating
Current
TC †
Average Reverse
Breakdown Voltage Temp.
Co.
TOL.
%
MIN
TYP MAX
1.228
1.225
1.21
1.24 1.252
1.25 1.275
1.25 1.29
30
0.05
UNITS
1.4
1.27
1.2
1.26
1.0
0.8
0.6
0.4
V
IR=150µA to 5mA
1.25
1.24
1.23
1.22
1.21
0.2
1
2
3
0.1
1
10
100
-40
1000
-20
0
50
µA
5
mA
20
40
60
80
Temperature (°C)
Forward Current (mA)
Forward Characteristics
Temperature Drift
1000
30
IR(min) to
IR(max)
90
ppm/°C
RS §
Slope Resistance
0.65 2
Ω
ZR
Reverse Dynamic Impedance IR = 1mA
f = 100Hz
IAC= 0.1 IR
0.5
Ω
EN
Wideband Noise Voltage
40
IR = 150µA
f = 100Hz to
10kHZ
1
1.0
100
Slope resistance (Ω)
VR
LIMITS
Slope resistance (Ω)
SYMBOL PARAMETER
TYPICAL CHARACTERISTICS
Power Dissipation (Tamb=25°C)
SOT23
330mW
E-Line, 3 pin (TO92)
500mW
E-Line, 2 pin (TO92)
500mW
SO8
625mW
25mA
25mA
-40 to 85°C
-55 to 125°C
Forward Voltage (V)
Reverse Current
Forward Current
Operating Temperature
Storage Temperature
Reference voltage (V)
ABSOLUTE MAXIMUM RATING
TA=-40°C
TA=25°C
0.5
TA =85°C
IR=150µA
10
IR=1mA
IR=5mA
1
0.1
0.01
0
0.1
µV(rms)
1
0.1
10
1
10
100
Frequency (kHz)
Reference Current (mA)
Slope Resistance v Current
Slope Resistance v Frequency
1.5
1.5
INPUT
58K
0.5
40
V - (V)
V - (V)
1.0
R
1.0
INPUT
R
1 K8
O UTPUT
0.5
O UTPUT
30
C
5°
A=
2
5
°C
T
10
A=
0
-4
°C
NI
T
0
0
10
10
- (V)
=8
TA
20
NI
0
V
VR Change (IR (min) to IR (max))
RS =
IR (max) − IR (min)
50
- (V)
§
VR Change x 1000000
VR x Temperature Change
V
† TC =
Reverse Current (µA)
60
0
0
0
0.2
0.4
0.6
0.8
1.0
1.2
Reverse Voltage (V)
Reverse Characteristics
1 - 45
1.4
0
1
2
3
4
0
Time (µs)
2
4
6
Time (µs)
Transient Response (IR=5mA)
µA)
Transient Response (IR=150µ
1 - 26
8
ZRA125
ZRA125
CONNECTION DIAGRAMS
E-Line, 2 pin Package Suffix – Y
Bottom View
E-Line, 3 pin Package Suffix – A
Bottom View –
Pin 1 floating or connected to pin 3
SOT23 Package Suffix – F
Top View –
Pin 1 floating or connected to pin 2
ORDERING INFORMATION
E-Line, 3 pin,Rev Package Suffix – R
Bottom View –
Pin 3 floating or connected to pin 1
SO8 Package Suffix – N8
Top View
Part No
Tol% Package
Partmark
Part No
Tol% Package
Partmark
ZRA125A03
3
E-Line •
ZRA12503
ZRA125R03
3
E-Line *
ZRA125R3
ZRA125A02
2
E-Line •
ZRA12502
ZRA125R02
2
E-Line *
ZRA125R2
ZRA125A01
1
E-Line •
ZRA12501
ZRA125R01
1
E-Line *
ZRA125R1
ZRA125F03
3
SOT23
12A
ZRA125Y03
3
E-Line †
ZRA12503
ZRA125F02
2
SOT23
12B
ZRA125Y02
2
E-Line †
ZRA12502
ZRA125F01
1
SOT23
12D
ZRA125Y01
1
E-Line †
ZRA12501
ZRA125N803
3
SO8
ZRA12503
ZRA125N802
2
SO8
ZRA12502
ZRA125N801
1
SO8
ZRA12501
* E-Line 3 pin Reversed
† E-Line 2 pin
• E-Line 3 pin
ZRA125
ZRA125
CONNECTION DIAGRAMS
E-Line, 2 pin Package Suffix – Y
Bottom View
E-Line, 3 pin Package Suffix – A
Bottom View –
Pin 1 floating or connected to pin 3
SOT23 Package Suffix – F
Top View –
Pin 1 floating or connected to pin 2
ORDERING INFORMATION
E-Line, 3 pin,Rev Package Suffix – R
Bottom View –
Pin 3 floating or connected to pin 1
SO8 Package Suffix – N8
Top View
Part No
Tol% Package
Partmark
Part No
Tol% Package
Partmark
ZRA125A03
3
E-Line •
ZRA12503
ZRA125R03
3
E-Line *
ZRA125R3
ZRA125A02
2
E-Line •
ZRA12502
ZRA125R02
2
E-Line *
ZRA125R2
ZRA125A01
1
E-Line •
ZRA12501
ZRA125R01
1
E-Line *
ZRA125R1
ZRA125F03
3
SOT23
12A
ZRA125Y03
3
E-Line †
ZRA12503
ZRA125F02
2
SOT23
12B
ZRA125Y02
2
E-Line †
ZRA12502
ZRA125F01
1
SOT23
12D
ZRA125Y01
1
E-Line †
ZRA12501
ZRA125N803
3
SO8
ZRA12503
ZRA125N802
2
SO8
ZRA12502
ZRA125N801
1
SO8
ZRA12501
* E-Line 3 pin Reversed
† E-Line 2 pin
• E-Line 3 pin