0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakd
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0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
MAX6138 precision, two-terminal shunt mode, bandgap voltage reference available fixed reverse breakdown voltages 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, 5.0V. Ideal space-critical applications, MAX6138 offered subminiature 3-pin SC70 surface-mount package (1.8mm 1.8mm), smaller than comparable devices SOT23 surfacemount packages. Laser-trimmed resistors ensure precise initial accuracy. With 25ppm/°C temperature coefficient, device offered three grades initial accuracy ranging from 0.1% 0.5%. MAX6138 60µA 15mA shuntcurrent capability with low-dynamic impedance, ensuring stable reverse breakdown voltage accuracy over wide range operating temperatures currents. MAX6138 does require external stabilizing capacitor while ensuring stability with capacitive loads. MAX6138 higher precision device smaller package than LM4040/LM4050. Ultra-Small 3-Pin SC70 Package 0.1% (max) Initial Accuracy 25ppm/°C (max) Temperature Coefficient Guaranteed Over -40°C +85°C Temperature Range Wide Operating Current Range: 60µA 15mA 28µVRMS Output Noise (10Hz 10kHz) 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, 5.0V Fixed Reverse Breakdown Voltages Output Capacitors Required Stable with Capacitive Loads
Features
MAX6138
Selector Guide
PART TEMP RANGE OUTPUT PINVOLTAGE PACKAGE SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 1.2205 2.0480 2.5000 3.0000 3.3000 4.0960 5.0000
Applications
Portable, Battery-Powered Equipment Notebook Computers Cell Phones Industrial Process Control
MAX6138_EXR12-T -40°C +85°C MAX6138_EXR21-T -40°C +85°C MAX6138_EXR25-T -40°C +85°C MAX6138_EXR30-T -40°C +85°C MAX6138_EXR33-T -40°C +85°C MAX6138_EXR41-T -40°C +85°C MAX6138_EXR50-T -40°C +85°C
Ordering Information appears data sheet.
Typical Operating Circuit Configuration
VIEW
ISHUNT ILOAD ILOAD
MAX6138
N.C.*
ISHUNT
SC70
*PIN MUST LEFT FLOATING CONNECTED
MAX6138
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages MAX6138
ABSOLUTE MAXIMUM RATINGS
Reverse Current (cathode anode) .20mA Forward Current (anode cathode) .10mA Continuous Power Dissipation +70°C) 3-Pin SC70 (derate 2.17mW/°C above +70°C) .174mW Operating Temperature Range .-40°C +125°C Storage Temperature Range .-65°C +150°C Junction Temperature .+150°C Lead Temperature (soldering, 10s) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS-MAX6138_12 (1.2205V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage SYMBOL CONDITIONS MAX6138A (0.1%) IRMIN IRMIN VR/IR 12mA 1mA, 120Hz, 0.1IR 10µA, 10Hz 10kHz 1000h +25°C MAX6138B (0.2%) MAX6138C (0.5%) 1.2193 1.2181 1.2144 1.2205 1.2205 1.2205 1.2217 1.2229 1.2266 ppm/°C UNITS
µVRMS
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS-MAX6138_21 (2.048V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage Long-Term Stability SYMBOL IRMIN IRMIN 15mA 1mA, 120Hz, 0.1IR 10Hz 10kHz 1000h +25°C CONDITIONS MAX6138A (0.1%) MAX6138B (0.2%) MAX6138C (0.5%) 2.0460 2.0439 2.0378 2.0480 2.0480 2.0480 2.0500 2.0521 2.0582 ppm/°C UNITS
MAX6138
VR/IR
µVRMS
ELECTRICAL CHARACTERISTICS-MAX6138_25 (2.5V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage Long-Term Stability SYMBOL CONDITIONS MAX6138A (0.1%) IRMIN +25°C MAX6138B (0.2%) MAX6138C (0.2%) 2.4975 2.4950 2.4875 2.5000 2.5000 2.5000 2.5025 2.5050 2.5125 ppm/°C UNITS
VR/IR
IRMIN
VR/IR
15mA
1mA, 120Hz, 0.1IR 10Hz 10kHz 1000h
µVRMS
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages MAX6138
ELECTRICAL CHARACTERISTICS-MAX6138_30 (3.0V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage Long-Term Stability SYMBOL CONDITIONS MAX6138A (0.1%) +25°C MAX6138B (0.2%) MAX6138C (0.5%) IRMIN 2.9970 2.9940 2.9850 3.0000 3.0000 3.0000 3.0030 3.0060 3.0150 UNITS
ppm/°C
VR/IR
IRMIN 15mA 1mA, =120Hz, 0.1IR 10Hz 10kHz 1000h
µVRMS
ELECTRICAL CHARACTERISTICS-MAX6138_33 (3.3V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage Long-Term Stability SYMBOL CONDITIONS MAX6138A (0.1%) IRMIN +25°C MAX6138B (0.2%) MAX6138C (0.5%) 3.2967 3.2934 3.2835 3.3000 3.3000 3.3000 3.3033 3.3066 3.3165 UNITS
ppm/°C
VR/IR
IRMIN 15mA 1mA, =120Hz, 0.1IR 10Hz 10kHz 1000h
µVRMS
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS-MAX6138_41 (4.096V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage Long-Term Stability SYMBOL +25°C CONDITIONS MAX6138A (0.1%) MAX6138B (0.2%) MAX6138C (0.5%) IRMIN 4.0919 4.0878 4.0755 4.0960 4.0960 4.0960 4.1001 4.1042 4.1165 UNITS
MAX6138
ppm/°C
VR/IR
IRMIN 15mA 1mA, 120Hz, 0.1IR 10Hz 10kHz 1000h
10.0 µVRMS
ELECTRICAL CHARACTERISTICS-MAX6138_50 (5.0V)
100µA, -40°C +85°C, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER Reverse Breakdown Voltage (Note Minimum Operating Current Reverse Voltage Temperature Coefficient (Notes Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note Wideband Noise Reverse Breakdown Voltage Long-Term Stability SYMBOL IRMIN IRMIN 15mA 1mA, 120Hz, 0.1IR 10Hz 10kHz 1000h +25°C CONDITIONS MAX6138A (0.1%) MAX6138B (0.2%) MAX6138C (0.5%) 4.9950 4.9900 4.9750 5.0000 5.0000 5.0000 5.0050 5.0100 5.0250 ppm/°C UNITS
12.0 µVRMS
VR/IR
Note devices 100% production tested +25°C guaranteed correlation TMAX TMIN, specified. Note measured "box" method, i.e. (VMAX VMIN) (TMAX TMIN) Note Guaranteed design.
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages MAX6138
Typical Operating Characteristics
100µA, +25°C, unless otherwise noted.)
REVERSE CHARACTERISTICS MINIMUM OPERATING CURRENT
MAX6138_50 MAX6138_41 MAX6138_30 MAX6138_25 MAX6138_20 MAX6138_12
MAX6138 toc01
MAX6138_12 TEMPERATURE DRIFT
MAX6138 toc02
MAX6138_25 TEMPERATURE DRIFT
MAX6138 toc03
REVERSE VOLTAGE
1.2215
2.5015 2.5010 REVERSE VOLTAGE 2.5005 2.5000 2.4995 2.4990 2.4895
REVERSE VOLTAGE
1.2210
1.2205
1.2200 TYPICAL PARTS
TYPICAL PARTS 2.4890
REVERSE CURRENT (µA)
1.2195 TEMPERATURE (°C)
TEMPERATURE (°C)
MAX6138_50 TEMPERATURE DRIFT
5.003 5.002 REVERSE VOLTAGE 5.001 5.000 4.999 4.998 4.997 TYPICAL PARTS 4.996 TEMPERATURE (°C)
MAX6138 toc04
MAX6138_12 REVERSE VOLTAGE ISHUNT
REVERSE VOLTAGE CHANGE (mV) ISHUNT (mA) -40°C +25°C +85°C
MAX61438 toc05
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics (continued)
100µA, +25°C, unless otherwise noted.)
MAX6138_25 REVERSE VOLTAGE ISHUNT
MAX61438 toc06
MAX6138
MAX6138_50 REVERSE VOLTAGE ISHUNT
REVERSE VOLTAGE CHANGE (mV) -40°C +25°C +85°C
MAX61438 toc07
REVERSE VOLTAGE CHANGE (mV) ISHUNT (mA) -40°C +25°C +85°C
ISHUNT (mA)
MAX6138_12 LOAD-TRANSIENT RESPONSE
MAX6138 toc08
MAX6138_25 LOAD-TRANSIENT RESPONSE
MAX6138 toc09
+25µA +25µA -25µA -25µA
AC-COUPLED 10mV/div
AC-COUPLED 10mV/div
4µs/div ISHUNT 100µA ±25µA ISHUNT 100µA 100k
10µs/div
ISHUNT ILOAD
VGEN
Figure Load-Transient Circuit
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages MAX6138
Typical Operating Characteristics (continued)
100µA, +25°C, unless otherwise noted.)
MAX6138_50 LOAD-TRANSIENT RESPONSE
MAX6138 toc10
MAX6138_12 LOAD-TRANSIENT RESPONSE
MAX6138 toc11
+25µA +250µA
-25µA
-250µA
AC-COUPLED 20mV/div
AC-COUPLED 2.0mV/div
40µs/div ISHUNT 100µA 100k ISHUNT
10µs/div
MAX6138_25 LOAD-TRANSIENT RESPONSE
MAX6138 toc12
MAX6138_50 LOAD-TRANSIENT RESPONSE
MAX6138 toc13
+250µA +250µA -250µA -250µA
AC-COUPLED 10mV/div
AC-COUPLED 2mV/div
10µs/div ISHUNT ISHUNT
40µs/div
RATE DUTY CYCLE
Figure Startup Characteristics Test Circuit
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics (continued)
100µA, +25°C, unless otherwise noted.)
MAX6138_12 LOAD-TRANSIENT RESPONSE
MAX6138 toc14
MAX6138
MAX6138_25 LOAD-TRANSIENT RESPONSE
MAX6138 toc15
+2.5mA
+2.5mA
-2.5mA
-2.5mA
AC-COUPLED 100mV/div
AC-COUPLED 5mV/div
10µs/div ISHUNT 10mA ISHUNT 10mA
10µs/div
MAX6138_50 LOAD-TRANSIENT RESPONSE
MAX6138 toc16
MAX6138_12 STARTUP CHARACTERISTICS
MAX6138 toc17
+2.5mA
-2.5mA
1.2V AC-COUPLED 100mV/div VOUT 40µs/div ISHUNT 10mA ISHUNT 100µA 200ns/div
MAX6138_25 STARTUP CHARACTERISTICS
MAX6138 toc18
MAX6138_50 STARTUP CHARACTERISTICS
MAX6138 toc19
MAX6138_12 OUTPUT IMPEDANCE FREQUENCY
IMPEDANCE
MAX6138 toc20
1000
150µA
VOUT
VOUT
FREQUENCY (Hz) 100k
2µs/div ISHUNT 100µA ISHUNT 100µA
100µs/div
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages MAX6138
Typical Operating Characteristics (continued)
100µA, +25°C, unless otherwise noted.)
MAX6138_25 OUTPUT IMPEDANCE FREQUENCY
MAX61438 toc21
MAX6138_50 OUTPUT IMPEDANCE FREQUENCY
MAX6138 toc22
1000 IMPEDANCE
150µA
FREQUENCY (Hz) 1000
IMPEDANCE
150µA
FREQUENCY (Hz) 1000
MAX6138_12 NOISE FREQUENCY
10,000
MAX6138 toc23
MAX6138_25 NOISE FREQUENCY
MAX6138 toc24
10,000
NOISE (nVHz)
NOISE (nV/Hz)
1000
1000
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX6138_50 NOISE FREQUENCY
MAX6138 toc25
10,000
NOISE (nV/Hz)
1000
FREQUENCY (Hz)
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
Description
NAME N.C. Positive Terminal Shunt Reference Negative Terminal Shunt Reference Connection. Leave this unconnected connect FUNCTION
MAX6138
Detailed Description
MAX6138 shunt reference uses bandgap principle produce stable, accurate voltage. device behaves similarly ideal zener diode; fixed voltage maintained across output terminals when biased with 60µA 15mA reverse current. MAX6138 behaves similarly silicon diode when biased with forward currents 10mA. Figure shows typical operating circuit. MAX6138 ideal providing stable reference from high-voltage power supply.
ISHUNT ILOAD ILOAD
ISHUNT
MAX6138
Applications Information
MAX6138's internal pass transistor used maintain constant output voltage (VSHUNT) sinking necessary amount current across source resistor. source resistance (RS) determined from load current (ILOAD) range, supply voltage (VS) variations, VSHUNT, desired quiescent current. Choose value when minimum ILOAD maximum. Maintain minimum ISHUNT 60µA times. value should large enough keep ISHUNT less than 15mA proper regulation when maximum ILOAD minimum. prevent damage device, ISHUNT should never exceed 20mA. Therefore, value bounded following equation: [VS(MIN) [60µA ILOAD(MAX)] [VS(MAX) [20mA ILOAD(MIN)] TRANSISTOR COUNT: Choosing larger resistance minimizes total power dissipation circuit reducing shunt current (PD(TOTAL) ISHUNT). Provide safety margin incorporate worst-case tolerance resistor used. Ensure that resistor's power rating adequate, using following general power equation: ISHUNT (VS(MAX) VSHUNT) PROCESS: BiCMOS
Figure Typical Operating Circuit
Output Capacitance
MAX6138 does require external capacitor operational stability stable output capacitance.
Temperature Performance
MAX6138 typically exhibits output voltage temperature coefficient within ±4ppm/°C. polarity temperature coefficient different from device another; some have positive coefficients, others have negative coefficients.
Chip Information
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages MAX6138
Ordering Information
PART MAX6138AEXR12-T MAX6138BEXR12-T MAX6138CEXR12-T MAX6138AEXR21-T MAX6138BEXR21-T MAX6138CEXR21-T MAX6138AEXR25-T MAX6138BEXR25-T MAX6138CEXR25-T MAX6138AEXR30-T MAX6138BEXR30-T MAX6138CEXR30-T MAX6138AEXR33-T MAX6138BEXR33-T MAX6138CEXR33-T MAX6138AEXR41-T MAX6138BEXR41-T MAX6138CEXR41-T MAX6138AEXR50-T MAX6138BEXR50-T MAX6138CEXR50-T OUTPUT VOLTAGE 1.2205 1.2205 1.2205 2.0480 2.0480 2.0480 2.5000 2.5000 2.5000 3.0000 3.0000 3.0000 3.3000 3.3000 3.3000 4.0960 4.0960 4.0960 5.0000 5.0000 5.0000 INITIAL ACCURACY TEMP RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PIN-PACKAGE SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 SC70-3 MARK
0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages
Package Information
SC70, 3L.EPS
MAX6138
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2004 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.
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