MAX6138BEXR33+T ,0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown VoltagesFeaturesThe MAX6138 is a precision, two-terminal shunt mode,♦ Ultra-Small 3-Pin SC70 Packagebandgap ..
MAX6138BEXR50+T ,0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown VoltagesELECTRICAL CHARACTERISTICS—MAX6138_12 (1.2205V)(I = 100µA, T = -40°C to +85°C, unless otherwise not ..
MAX6138CEXR12-T ,0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown VoltagesMAX613819-2090; Rev 2; 4/040.1%, 25ppm, SC70 Shunt Voltage Referencewith Multiple Reverse Breakdown ..
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MAZS1600-M ,Silicon planar typeFeatures•SS-mini type 2-pin package•Low noise type•V rank classified (V = 2.4 V to 39 V)Z Z
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MAX6138AEXR12+T-MAX6138AEXR50+T-MAX6138BEXR33+T-MAX6138BEXR50+T-MAX6138CEXR12-T
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
General DescriptionThe 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.
ApplicationsPortable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Control
FeaturesUltra-Small 3-Pin SC70 Package0.1% (max) Initial Accuracy25ppm/°C (max) Temperature Coefficient
Guaranteed Over -40°C to +85°C Temperature
RangeWide Operating Current Range: 60µA to 15mALow 28µVRMSOutput Noise (10Hz to 10kHz)1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V
Fixed Reverse Breakdown VoltagesNo Output Capacitors RequiredStable with Capacitive Loads
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown VoltagesMAX6138
ILOAD
ISHUNT
ISHUNT + ILOADN.C.*
MAX6138
SC70TOP VIEW
*PIN 3 MUST BE LEFT FLOATING
OR CONNECTED TO PIN 2.
PARTTEMP
RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)MAX6138_EXR12-T-40°C to +85°C3 SC70-31.2205
MAX6138_EXR21-T-40°C to +85°C3 SC70-32.0480
MAX6138_EXR25-T-40°C to +85°C3 SC70-32.5000
MAX6138_EXR30-T-40°C to +85°C3 SC70-33.0000
MAX6138_EXR33-T-40°C to +85°C3 SC70-33.3000
MAX6138_EXR41-T-40°C to +85°C3 SC70-34.0960
MAX6138_EXR50-T-40°C to +85°C3 SC70-35.0000
Pin Configuration
Selector Guide
Typical Operating Circuit19-2090; Rev 2; 4/04
Ordering Information appears at end of data sheet.
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX6138_12 (1.2205V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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.
Reverse Current (cathode to anode)..................................20mA
Forward Current (anode to cathode)..................................10mA
Continuous Power Dissipation (TA A = +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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)1.21931.22051.2217
MAX6138B (0.2%)1.21811.22051.2229Reverse Breakdown Voltage
(Note 2)VRTA = +25°C
MAX6138C (0.5%)1.21441.22051.2266
Minimum Operating CurrentIRMIN4560µA
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)425ppm/°C
IRMIN ≤ IR ≤ 1mA0.31.0Reverse Breakdown Voltage
Change with Operating
Current Change
ΔVR/ΔIR
1mA ≤ IR ≤ 12mA2.58.0
Reverse Dynamic
Impedance (Note 3)ZRIR = 1mA, f = 120Hz, IAC = 0.1IR0.30.8Ω
Wideband NoiseeNIR = 10µA, 10Hz ≤ f ≤ 10kHz20µVRMS
Reverse Breakdown VoltageΔVRt = 1000h120ppm
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS—MAX6138_21 (2.048V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
ELECTRICAL CHARACTERISTICS—MAX6138_25 (2.5V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)2.04602.04802.0500
MAX6138B (0.2%)2.04392.04802.0521Reverse Breakdown
Voltage (Note 2)VRTA = +25°C
MAX6138C (0.5%)2.03782.04802.0582i ni m um Op er ati ng C ur r entIRMIN4565µA
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)425ppm/°C
IRMIN ≤ IR ≤ 1mA0.31.0Reverse Breakdown
Voltage Change with
Operating Current Change
ΔVR/ΔIR
1mA ≤ IR ≤ 15mA2.58.0
Reverse Dynamic
Impedance (Note 3)ZRIR = 1mA, f = 120Hz, IAC = 0.1IR0.30.8Ω
Wideband NoiseeN10Hz ≤ f ≤ 10kHz28µVRMS
Rever se Br eakd ow nol tag e Long - Ter m S tab i l i tyΔVRt = 1000h120ppm
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)2.49752.50002.5025
MAX6138B (0.2%)2.49502.50002.5050Reverse Breakdown Voltage
(Note 2)VRTA = +25°C
MAX6138C (0.2%)2.48752.50002.5125
Minimum Operating CurrentIRMIN4565µA
Reverse Voltage Temperature
Coefficient (Notes 2, 3)TC425ppm/°C
Reverse Breakdown Voltage
Change with Operating Current
Change
ΔVR/ΔIRIRMIN ≤ IR ≤ 1mA0.31.0mV
Rever se Br eakd ow n V ol tag ehang e w i th Op er ati ng C ur r enthang e
ΔVR/ΔIR1mA ≤ IR ≤ 15mA2.58.0mV
Reverse Dynamic Impedance
(Note 3)ZRIR = 1mA, f = 120Hz, IAC = 0.1IR0.30.8Ω
Wideband NoiseeN10Hz ≤ f ≤ 10kHz35µVRMS
Reverse Breakdown Voltage
Long-Term StabilityΔVRt = 1000h120ppm
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)2.99703.00003.0030
MAX6138B (0.2%)2.99403.00003.0060Reverse Breakdown
Voltage (Note 2)VRTA = +25°C
MAX6138C (0.5%)2.98503.00003.0150
Minimum Operating
CurrentIRMIN4565µA
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)425ppm/°C
IRMIN ≤ IR ≤ 1mA0.31.0Reverse Breakdown
Voltage Change with
Operating Current Change
ΔVR/ΔIR
1mA ≤ IR ≤ 15mA2.58.0
Reverse Dynamic
Impedance (Note 3)ZRIR = 1mA, f =120Hz, IAC = 0.1IR0.30.8Ω
Wideband NoiseeN10Hz ≤ f ≤ 10kHz45µVRMS
Reverse Breakdown
Voltage Long-Term
Stability
ΔVRt = 1000h120ppm
ELECTRICAL CHARACTERISTICS—MAX6138_30 (3.0V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)3.29673.30003.3033
MAX6138B (0.2%)3.29343.30003.3066Reverse Breakdown
Voltage (Note 2)VRTA = +25°C
MAX6138C (0.5%)3.28353.30003.3165i ni m um Op er ati ng C ur r entIRMIN4567µA
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)425ppm/°C
IRMIN ≤ IR ≤ 1mA0.31.0Reverse Breakdown
Voltage Change with
Operating Current Change
ΔVR/ΔIR
1mA ≤ IR ≤ 15mA8.0
Reverse Dynamic
Impedance (Note 3)ZRIR = 1mA, f =120Hz, IAC = 0.1IR0.30.8Ω
Wideband NoiseeN10Hz ≤ f ≤ 10kHz50µVRMS
Reverse Breakdown
Voltage Long-Term
Stability
ΔVRt = 1000h120ppm
ELECTRICAL CHARACTERISTICS—MAX6138_33 (3.3V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)4.09194.09604.1001
MAX6138B (0.2%)4.08784.09604.1042Reverse Breakdown
Voltage (Note 2)VRTA = +25°C
MAX6138C (0.5%)4.07554.09604.1165
Minimum Operating
CurrentIRMIN5073µA
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)425ppm/°C
IRMIN ≤ IR ≤ 1mA0.51.2Reverse Breakdown
Voltage Change with
Operating Current Change
ΔVR/ΔIR
1mA ≤ IR ≤ 15mA3.010.0
Reverse Dynamic
Impedance (Note 3)ZRIR = 1mA, f = 120Hz, IAC = 0.1IR0.51.0Ω
Wideband NoiseeN10Hz ≤ f ≤ 10kHz64µVRMS
Reverse Breakdown
Voltage Long-Term
Stability
ΔVRt = 1000h120ppm
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX6138A (0.1%)4.99505.00005.0050
MAX6138B (0.2%)4.99005.00005.0100Reverse Breakdown
Voltage (Note 2)VRTA = +25°C
MAX6138C (0.5%)4.97505.00005.0250i ni m um Op er ati ng C ur r entIRMIN5480µA
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)425ppm/°C
IRMIN ≤ IR ≤ 1mA0.51.4Reverse Breakdown
Voltage Change with
Operating Current Change
ΔVR/ΔIR
1mA ≤ IR ≤ 15mA3.512.0
Reverse Dynamic
Impedance (Note 3)ZRIR = 1mA, f = 120Hz, IAC = 0.1IR0.51.1Ω
Wideband NoiseeN10Hz ≤ f ≤ 10kHz80µVRMS
Rever se Br eakd ow nol tag e Long - Ter m S tab i l i tyΔVRt = 1000h120ppm
ELECTRICAL CHARACTERISTICS—MAX6138_41 (4.096V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
ELECTRICAL CHARACTERISTICS—MAX6138_50 (5.0V)(IR= 100µA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Note 1:All devices are 100% production tested at +25°C and are guaranteed by correlation for TA= TMAXto TMIN, as specified.
Note 2:TC is measured by the “box” method, i.e. (VMAX- VMIN) / (TMAX- TMIN)
Note 3:Guaranteed by design.
MAX6138_50
TEMPERATURE DRIFT
MAX6138 toc04
TEMPERATURE (°C)
REVERSE VOLTAGE (V)
3 TYPICAL PARTS
MAX6138_12
REVERSE VOLTAGE vs. ISHUNT
MAX61438 toc05
ISHUNT (mA)
REVERSE VOLTAGE CHANGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics(IR= 100µA, TA= +25°C, unless otherwise noted.)
REVERSE CHARACTERISTICS AND
MINIMUM OPERATING CURRENT
MAX6138 toc01
REVERSE CURRENT (μA)
REVERSE VOLTAGE (V)
MAX6138_50
MAX6138_41
MAX6138_30
MAX6138_25
MAX6138_12
MAX6138_20
MAX6138_12
TEMPERATURE DRIFT
MAX6138 toc02
TEMPERATURE (°C)
REVERSE VOLTAGE (V)
3 TYPICAL PARTS
MAX6138_25
TEMPERATURE DRIFT
MAX6138 toc03
TEMPERATURE (°C)
REVERSE VOLTAGE (V)
3 TYPICAL PARTS
MAX6138
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown VoltagesMAX6138_25
REVERSE VOLTAGE vs. ISHUNT
MAX61438 toc06
ISHUNT (mA)
REVERSE VOLTAGE CHANGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
MAX6138_50
REVERSE VOLTAGE vs. ISHUNT
MAX61438 toc07
ISHUNT (mA)
REVERSE VOLTAGE CHANGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
4μs/div
MAX6138_12
LOAD-TRANSIENT RESPONSEISHUNT = 100μA ±25μA
RL = 48kΩ
+25μA
VR AC-COUPLED
10mV/div
MAX6138 toc08
-25μA
10μs/div
MAX6138_25
LOAD-TRANSIENT RESPONSEISHUNT = 100μA
RL = 100kΩ
+25μA
VR AC-COUPLED
10mV/div
MAX6138 toc09
-25μA
Typical Operating Characteristics (continued)(IR= 100µA, TA= +25°C, unless otherwise noted.)
1kΩ+
ISHUNT + ILOAD
VGEN
Figure 1. Load-Transient Circuit
