Document
ZRA124
PRECISION 1.24 VOLT MICROPOWER VOLTAGE REFERENCE
DEVICE DESCRIPTION
The ZRA124 uses a bandgap circuit design to achieve a precision micropower voltage reference of 1.24 volts. The device is available in a small outline surface mount packages, ideal for applications where space saving is important. The ZRA124 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRA124 is recommended for operation between 50A and 5mA and so is ideally suited to low power and battery powered 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.
FEATURES
• Typical TC 30ppm/°C • Typical slope resistance 0.65⍀ • Ϯ 1% tolerance • Industrial temperature range • Operating current 50A to 5mA • No stabilising capacitor required • Transient response, stable in less than 10s • Small SOT23 package
SCHEMATIC DIAGRAM
APPLICATIONS
• Battery powered and portable equipment • Metering and measurement systems • Instrumentation • Precision power supplies • Test equipment • Data acquisition systems
TOP VIEW
Pin 1 floating or connected to pin 2
ORDERING INFORMATION
DEVICE ZRA124F01TA TOL % 1 REEL SIZE 7” TAPE WIDTH 8mm REEL QUANTITY 3,000 PART MARK 12C
ISSUE 3 - JUNE 2004 1
SEMICONDUCTORS
ZRA124
ABSOLUTE MAXIMUM RATING
Reverse current Forward current Operating temperature Storage temperature 25mA SOT23 25mA -40 to 85°C -55 to 125°C 330mW Power dissipation (Tamb = 25°C)
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
SYMBOL PARAMETER CONDITIONS LIMITS MIN. TYP. VR I MIN IR TC
(1)
TOL % MAX. 1.252 50 5 1
UNITS
Reverse breakdown voltage Minimum operating current Recomended operating current Average reverse breakdown voltage temp. co. Slope resistance Reverse dynamic impedance
I R = 150 A
1.228
1.24 30
V A mA ppm/°C ⍀ ⍀
0.05 I R (min) to I R (max) 30 0.65 I R = 1mA f = 100Hz 1 AC = 0.1IR I R = 150 A f = 100Hz to 10kHz 0.5
90 2 1
R S (2) ZR
EN
Wideband noise voltage
40
V(rms)
NOTES: (1) TC = (2) RS =
V R Change x 1000000 V R x Temperature Change V R Change (I R (min) to I R (max)) I R (max) − I R (min)
ISSUE 3 - JUNE 2004
SEMICONDUCTORS
2
ZRA124
TYPICAL CHARACTERISTICS
ISSUE 3 - JUNE 2004 3
SEMICONDUCTORS
ZRA124
PACKAGE OUTLINE
Controlling dimensions are in millimeters. Approximate conversions are given in inches
PACKAGE DIMENSIONS
Millimeters DIM A B C D F G Min 2.67 1.20 ᎏ 0.37 0.085 Max 3.05 1.40 1.10 0.53 0.15 Inches Min 0.105 0.047 ᎏ 0.015 0.0034 Max 0.120 0.055 0.043 0.021 0.0059 DIM H K L M N ᎏ Millimeters Min 0.33 0.01 2.10 0.45 ᎏ Max 0.51 0.10 2.50 0.64 Inches Max 0.013 0.0004 0.083 0.018 ᎏ Max 0.020 0.004 0.0985 0.025
0.95 NOM
0.0375 NOM
1.90 NOM
0.075 NOM
© Zetex Semiconductors plc 20.