ZRA125A02 [ETC]
Voltage Reference ; 基准电压源\n
| 型号： | ZRA125A02 |
| 厂家： | 
ETC |
| 描述： | Voltage Reference
|
| 文件： | 总5页 (文件大小：82K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRECISION 1.25 VOLT
MICROPOWER VOLTAGE REFERENCE
ISSUE 3 - FEBRUARY 1998
ZRA125
DEVICE DESCRIPTION
FEATURES
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.
Small outline SOT23, SO8 and TO92
style packages
•
No stabilising capacitor required
Typical TC 30ppm/°C
•
•
•
•
•
•
•
•
Typical slope resistance 0.65Ω
± 3%,2% and 1% tolerance
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.
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 an
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.
Battery powered and portable
equipment.
•
Metering and measurement systems.
•
Instrumentation.
•
Data acquisition systems.
•
Precision power supplies.
•
Test equipment.
•
SCHEMATIC DIAGRAM
V
R
Gnd
4-222
ZRA125
ABSOLUTE MAXIMUM RATING
Power Dissipation (Tamb=25°C)
Reverse Current
25mA
SOT23
330mW
500mW
500mW
625mW
Forward Current
25mA
E-Line, 3 pin (TO92)
E-Line, 2 pin (TO92)
SO8
Operating Temperature
Storage Temperature
-40 to 85°C
-55 to 125°C
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
CONDITIONS
LIMITS
TOL.
%
UNITS
SYMBOL PARAMETER
MIN TYP MAX
VR
Reverse Breakdown
Voltage
1.228 1.24 1.252
1.225 1.25 1.275
1
2
3
V
IR=150µA
1.21
1.25 1.29
IMIN
IR
Minimum Operating
Current
30
50
µA
Recommended Operating
Current
0.05
5
mA
TC
†
Average Reverse
Breakdown Voltage Temp.
Co.
30
90
ppm/°C
I
R(min) to
IR(max)
RS
ZR
§
Slope Resistance
0.65 2
Ω
Ω
Reverse Dynamic
Impedance
IR = 1mA
= 100Hz
AC=0.1 IR
0.5
1
f
I
EN
Wideband Noise Voltage
60
IR= 150µA
f = 100Hz to
10kHz
µV(rms)
60
50
(VR(max)−VR(min)) x 1000000
†
T =
C
VR x (T(max)−T(min)
)
40
30
20
Note: VR(max) - VR(min) is the maximum
deviation in reference voltage measured
over the full operating temperature
range.
10
0
VR Change(I (min) to IR (max))
R
§
R =
S
I
R (max) − IR (min)
0
0.2 0.4
0.6
0.8
1.0
1.2 1.4
Reverse Voltage (V)
Reverse Characteristics
4-223
ZRA125
TYPICAL CHARACTERISTICS
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.4
1.2
IR=150µA to 5mA
1.0
0.8
0.6
0.4
0.2
0.1
1
10
100
1000
-40
-20
0
20
40
60
80
Temperature (°C)
Forward Current (mA)
Forward Characteristics
Temperature Drift
1000
1.0
0.5
100
10
IR=150µA
TA=-40°C
TA=25°C
IR=1mA
IR=5mA
TA=85°C
1
0.1
0.01
0.1
1
10
100
0
0.1
1
10
Frequency (kHz)
Reference Current (mA)
Slope Resistance v Current
Slope Resistance v Frequency
1.5
1.0
0.5
1.5
1.0
0.5
INPUT
INPUT
1K8
58K
OUTPUT
OUTPUT
0
0
10
10
0
0
0
1
2
3
4
0
2
4
6
8
Time (µs)
Time (µs)
Transient Response (IR=5mA)
Transient Response (IR=150µA)
4-224
ZRA125
CONNECTION DIAGRAMS
E-Line, 2 pin Package Suffix – Y
E-Line, 3 pin,Rev Package Suffix – R
Bottom View
Bottom View –
Pin 3 floating or connected to pin 1
E-Line, 3 pin Package Suffix – A
SO8 Package Suffix – N8
Bottom View –
Pin 1 floating or connected to pin 3
Top View
SOT23 Package Suffix – F
Top View –
Pin 1 floating or connected to pin 2
4-225
ZRA125
ORDERING INFORMATION
Part No
Tol
%
Package Partmark
Part No
Tol
%
Package Partmark
ZRA125R03
ZRA125R02
ZRA125R01
ZRA125Y03
ZRA125Y02
ZRA125Y01
3
2
1
3
2
1
E-Line * ZRA125R3
E-Line * ZRA125R2
E-Line * ZRA125R1
E-Line † ZRA12503
E-Line † ZRA12502
E-Line † ZRA12501
ZRA125A03
ZRA125A02
ZRA125A01
ZRA125F03
ZRA125F02
ZRA125F01
ZRA125N803
ZRA125N802
ZRA125N801
3
2
1
3
2
1
3
2
1
E-Line • ZRA12503
E-Line • ZRA12502
E-Line • ZRA12501
SOT23
SOT23
SOT23
SO8
12A
12B
12D
* E-Line 3 pin Reversed
† E-Line 2 pin
• E-Line 3 pin
ZRA12503
ZRA12502
ZRA12501
SO8
SO8
4-226
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