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Maxim Integrated Semiconductor Electronic Components Datasheet

6138C Datasheet

MAX6138C

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6138C pdf
19-2090; Rev 2; 4/04
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0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
General Description
The MAX6138 is a precision, two-terminal shunt mode,
bandgap voltage reference available in fixed reverse
breakdown voltages of 1.2205V, 2.048V, 2.5V, 3.0V,
3.3V, 4.096V, and 5.0V. Ideal for space-critical applica-
tions, the MAX6138 is offered in the subminiature 3-pin
SC70 surface-mount package (1.8mm X 1.8mm), 50%
smaller than comparable devices in SOT23 surface-
mount packages.
Laser-trimmed resistors ensure precise initial accuracy.
With a 25ppm/°C temperature coefficient, the device is
offered in three grades of initial accuracy ranging from
0.1% to 0.5%. The MAX6138 has a 60µA to 15mA shunt-
current capability with low-dynamic impedance, ensuring
stable reverse breakdown voltage accuracy over a wide
range of operating temperatures and currents.
The MAX6138 does not require an external stabilizing
capacitor while ensuring stability with capacitive loads.
The MAX6138 is a higher precision device in a smaller
package than the LM4040/LM4050.
Applications
Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Control
Features
o Ultra-Small 3-Pin SC70 Package
o 0.1% (max) Initial Accuracy
o 25ppm/°C (max) Temperature Coefficient
Guaranteed Over -40°C to +85°C Temperature
Range
o Wide Operating Current Range: 60µA to 15mA
o Low 28µVRMS Output Noise (10Hz to 10kHz)
o 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V
Fixed Reverse Breakdown Voltages
o No Output Capacitors Required
o Stable with Capacitive Loads
Selector Guide
PART
TEMP
RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)
MAX6138_EXR12-T -40°C to +85°C 3 SC70-3 1.2205
MAX6138_EXR21-T -40°C to +85°C 3 SC70-3 2.0480
MAX6138_EXR25-T -40°C to +85°C 3 SC70-3 2.5000
MAX6138_EXR30-T -40°C to +85°C 3 SC70-3 3.0000
MAX6138_EXR33-T -40°C to +85°C 3 SC70-3 3.3000
MAX6138_EXR41-T -40°C to +85°C 3 SC70-3 4.0960
MAX6138_EXR50-T -40°C to +85°C 3 SC70-3 5.0000
Ordering Information appears at end of data sheet.
Typical Operating Circuit
Pin Configuration
VS
TOP VIEW
+1
MAX6138 3 N.C.*
-2
SC70
*PIN 3 MUST BE LEFT FLOATING
OR CONNECTED TO PIN 2.
RS
ISHUNT
ISHUNT + ILOAD
ILOAD
VR
MAX6138
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

6138C Datasheet

MAX6138C

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6138C pdf
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0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ABSOLUTE MAXIMUM RATINGS
Reverse Current (cathode to anode) ..................................20mA
Forward Current (anode to cathode) ..................................10mA
Continuous Power Dissipation (TA = +70°C)
3-Pin SC70 (derate 2.17mW/°C above +70°C) ...........174mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICSMAX6138_12 (1.2205V)
(IR = 100µA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Reverse Breakdown Voltage
(Note 2)
Minimum Operating Current
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
SYMBOL
VR
IRMIN
TC
CONDITIONS
MAX6138A (0.1%)
TA = +25°C
MAX6138B (0.2%)
MAX6138C (0.5%)
MIN
1.2193
1.2181
1.2144
TYP
1.2205
1.2205
1.2205
45
4
Reverse Breakdown Voltage
Change with Operating
Current Change
VR/IR
IRMIN IR 1mA
1mA IR 12mA
0.3
2.5
Reverse Dynamic
Impedance (Note 3)
ZR IR = 1mA, f = 120Hz, IAC = 0.1IR
Wideband Noise
eN IR = 10µA, 10Hz f 10kHz
Reverse Breakdown Voltage VR t = 1000h
0.3
20
120
MAX
1.2217
1.2229
1.2266
60
UNITS
V
µA
25 ppm/°C
1.0
mV
8.0
0.8
µVRMS
ppm
2 _______________________________________________________________________________________


Part Number 6138C
Description MAX6138C
Maker Maxim Integrated Products
Total Page 13 Pages
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