19-3249; Rev 1; 2/11 High-Precision Voltage References with Temperature Sensor The MAX6173-MAX6177 are low-noise, high-precision voltage references. The devices feature a proprietary temperature-coefficient curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low 3ppm/C temperature coefficient and excellent 0.06% initial accuracy. The MAX6173-MAX6177 provide a TEMP output where the output voltage is proportional to the die temperature, making the devices suitable for a wide variety of temperature-sensing applications. The devices also provide a TRIM input, allowing fine trimming of the output voltage with a resistive divider network. Low temperature drift and low noise make the devices ideal for use with high-resolution A/D or D/A converters. The MAX6173-MAX6177 provide accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages and accept input voltages up to +40V. The devices draw 320A (typ) of supply current and source 30mA or sink 2mA of load current. The MAX6173-MAX6177 use bandgap technology for low-noise performance and excellent accuracy. The MAX6173-MAX6177 do not require an output bypass capacitor for stability, and are stable with capacitive loads up to 100F. Eliminating the output bypass capacitor saves valuable board area in space-critical applications. The MAX6173-MAX6177 are available in an 8-pin SO package and operate over the automotive (-40C to +125C) temperature range. Features Wide (VOUT + 2V) to +40V Supply Voltage Range Excellent Temperature Stability: 3ppm/C (max) Tight Initial Accuracy: 0.05% (max) Low Noise: 3.8VP-P (typ at 2.5V Output) Sources up to 30mA Output Current Low Supply Current: 450A (max at +25C) Linear Temperature Transducer Voltage Output +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output Voltages Wide Operating Temperature Range: -40C to +125C No External Capacitors Required for Stability Short-Circuit Protected Typical Operating Circuit (VOUT + 2V) TO 40V INPUT IN * MAX6173-MAX6177 TEMP * TRIM GND Applications A/D Converters D/A Converters Digital Voltmeters REFERENCE OUTPUT OUT *OPTIONAL. * Voltage Regulators Threshold Detectors Pin Configuration appears at end of data sheet. Ordering Information/Selector Guide TEMP RANGE PINPACKAGE OUTPUT VOLTAGE (V) TEMPERATURE COEFFICIENT (ppm/C) -40C TO +125C INITIAL ACCURACY (%) MAX6173AASA+ -40C to +125C 8 SO 2.500 3 0.06 MAX6173BASA+ -40C to +125C 8 SO 2.500 10 0.10 MAX6174AASA+ -40C to +125C 8 SO 4.096 3 0.06 MAX6174BASA+ -40C to +125C 8 SO 4.096 10 0.10 MAX6175AASA+ -40C to +125C 8 SO 5.000 3 0.06 MAX6175BASA+ -40C to +125C 8 SO 5.000 10 0.10 MAX6175BASA/V+ -40C to +125C 8 SO 5.000 10 0.10 MAX6176AASA+ -40C to +125C 8 SO 10.000 3 0.05 MAX6176BASA+ -40C to +125C 8 SO 10.000 10 0.10 MAX6177AASA+ -40C to +125C 8 SO 3.300 3 0.06 MAX6177BASA+ -40C to +125C 8 SO 3.300 10 0.10 PART +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX6173-MAX6177 General Description MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +42V OUT, TRIM, TEMP to GND...........................-0.3V to (VIN + 0.3V) Output Short Circuit to GND .....................................................5s Continuous Power Dissipation (TA = +70C) 8-Pin SO (derate 5.9mW/C above +70C) ..................471mW Operating Temperature Range ........................-40C to +125C Junction Temperature .....................................................+150C Storage Temperature Range ............................-65C to +150C Lead Temperature (soldering, 10s) ................................+300C Soldering Temperature (reflow) ......................................+260C 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 CHARACTERISTICS--MAX6173 (VOUT = 2.5V) (VIN = +5V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6173A (0.06%) 2.4985 2.5 2.5015 MAX6173B (0.1%) 2.4975 2.5 2.5025 3 6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25C Output Adjustment Range VTRIM RPOT = 10k Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40C to +125C Line Regulation (Note 3) Load Regulation (Note 3) Output Short-Circuit Current VOUT / VIN 4.5V VIN 40V VOUT / IOUT ISC Temperature Hysteresis (Note 4) VOUT/ cycle Long-Term Stability VOUT/ time V % MAX6173AASA 1.5 3 MAX6173BASA 3 10 ppm/C TA = +25C 0.6 5 TA = -40C to +125C 0.8 10 2 10 Sourcing: 0 IOUT 10mA TA = +25C TA = -40C to +125C 2 15 Sinking: -0.6mA IOUT 0 TA = +25C 50 500 TA = -40C to +125C 90 900 OUT shorted to GND 60 OUT shorted to IN 3 1000 hours at TA = +25C ppm/V ppm/mA mA 120 ppm 50 ppm DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR f = 0.1Hz to 10Hz 3.8 VP-P f = 10Hz to 1kHz 6.8 VRMS To VOUT = 0.1% of final value, COUT = 50pF 150 s INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load TA = +25C 4.5 40.0 300 TA = -40C to +125C 450 600 V A TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient 2 VTEMP 570 mV TCTEMP 1.9 mV/C _______________________________________________________________________________________ High-Precision Voltage References with Temperature Sensor (VIN = +10V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6177A (0.06%) 3.2980 3.3 3.3020 MAX6177B (0.1%) 3.2967 3.3 3.3033 3 6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25C Output Adjustment Range VTRIM RPOT = 10k Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40C to +125C Line Regulation (Note 3) VOUT / VIN Load Regulation (Note 3) Output Short-Circuit Current VOUT / IOUT ISC Temperature Hysteresis (Note 4) VOUT/ cycle Long-Term Stability VOUT/ time 5.3V VIN 40V V % MAX6177AASA 1.5 3 MAX6177BASA 3 10 ppm/C TA = +25C 0.6 5 TA = -40C to +125C 0.8 10 2 10 Sourcing: 0 IOUT 10mA TA = +25C TA = -40C to +125C 2 15 Sinking: -0.6mA IOUT 0 TA = +25C 50 500 TA = -40C to +125C 90 900 OUT shorted to GND 60 OUT shorted to IN 3 ppm/V ppm/ mA mA 120 ppm 50 ppm 5 VP-P f = 10Hz to 1kHz 9.3 VRMS To VOUT = 0.1% of final value, COUT = 50pF 180 s 1000 hours at TA = +25C DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR f = 0.1Hz to 10Hz INPUT Supply Voltage Range Quiescent Supply Current VIN IIN Guaranteed by line regulation test No load TA = +25C 5.3 40.0 320 TA = -40C to +125C 500 650 V A TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP 630 mV TCTEMP 2.1 mV/C _______________________________________________________________________________________ 3 MAX6173-MAX6177 ELECTRICAL CHARACTERISTICS--MAX6177 (VOUT = 3.3V) MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor ELECTRICAL CHARACTERISTICS--MAX6174 (VOUT = 4.096V) (VIN = +10V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage Output Adjustment Range VOUT VTRIM No load, TA = +25C TCVOUT TA = -40C to +125C Line Regulation (Note 3) VOUT/ VIN 6.1V VIN 40V Output Short-Circuit Current VOUT/ IOUT ISC Temperature Hysteresis (Note 4) VOUT/ cycle Long-Term Stability VOUT/ time 4.0935 4.096 4.0985 4.0919 4.096 4.1001 3 RPOT = 10k Output-Voltage Temperature Coefficient (Note 2) Load Regulation (Note 3) MAX6174A (0.06%) MAX6174B (0.1%) 6 % MAX6174AASA 1.5 3 MAX6174BASA 3 10 TA = +25C 0.6 5 TA = -40C to +125C 0.8 10 2 10 Sourcing: 0 IOUT 10mA TA = +25C TA = -40C to +125C 2 15 Sinking: -0.6mA IOUT 0 TA = +25C 50 500 TA = -40C to +125C 90 900 OUT shorted to GND 60 OUT shorted to IN 3 V ppm/C ppm/V ppm/mA mA 120 ppm 1000 hours at TA = +25C 50 ppm f = 0.1Hz to 10Hz 7 VP-P f = 10Hz to 1kHz 11.5 VRMS To VOUT = 0.1% of final value, COUT = 50pF 200 s DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR INPUT Supply Voltage Range Quiescent Supply Current VIN IIN Guaranteed by line regulation test No load TA = +25C 6.1 40.0 320 TA = -40C to +125C 500 650 V A TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient 4 VTEMP 630 mV TCTEMP 2.1 mV/C _______________________________________________________________________________________ High-Precision Voltage References with Temperature Sensor (VIN = +15V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6175A (0.06%) 4.9970 5.0 5.0030 MAX6175B (0.1%) 4.9950 5.0 5.0050 3 6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25C Output Adjustment Range VTRIM RPOT = 10k Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40C to +125C Line Regulation (Note 3) VOUT / VIN Load Regulation (Note 3) Output Short-Circuit Current VOUT / IOUT ISC Temperature Hysteresis (Note 4) VOUT/ cycle Long-Term Stability VOUT/ time 7V VIN 40V V % MAX6175AASA 1.5 3 MAX6175BASA 3 10 TA = +25C 0.6 5 TA = -40C to +125C 0.8 10 ppm/C Sourcing: 0 IOUT 10mA TA = +25C 2 10 TA = -40C to +125C 2 15 Sinking: -0.6mA IOUT 0 TA = +25C 50 500 TA = -40C to +125C 90 900 OUT shorted to GND 60 OUT shorted to IN 3 1000 hours at TA = +25C ppm/V ppm/mA mA 120 ppm 50 ppm DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR f = 0.1Hz to 10Hz 9 VP-P f = 10Hz to 1kHz 14.5 VRMS To VOUT = 0.1% of final value, COUT = 50pF 230 s INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load TA = +25C 7.0 40.0 320 TA = -40C to +125C 550 700 V A TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP 630 mV TCTEMP 2.1 mV/C _______________________________________________________________________________________ 5 MAX6173-MAX6177 ELECTRICAL CHARACTERISTICS--MAX6175 (VOUT = 5.0V) MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor ELECTRICAL CHARACTERISTICS--MAX6176 (VOUT = 10V) (VIN = +15V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage VOUT No load, TA = +25C Output Adjustment Range VTRIM RPOT = 10k Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40C to +125C Line Regulation (Note 3) VOUT/ VIN Load Regulation (Note 3) Output Short-Circuit Current VOUT/ IOUT ISC Temperature Hysteresis (Note 4) VOUT/ cycle Long-Term Stability VOUT/ time 12V VIN 40V MAX6176A (0.05%) 9.9950 10.0 10.0050 MAX6176B (0.1%) 9.9900 10.0 10.0100 3 6 V % MAX6176AASA 1.5 3 MAX6176BASA 3 10 TA = +25C 0.6 5 TA = -40C to +125C 0.8 10 ppm/C Sourcing: 0 IOUT 10mA TA = +25C 2 10 TA = -40C to +125C 2 15 Sinking: -0.6mA IOUT 0 TA = +25C 50 500 TA = -40C to +125C 90 900 OUT shorted to GND 60 OUT shorted to IN 3 1000 hours at TA = +25C ppm/V ppm/mA mA 120 ppm 50 ppm DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR f = 0.1Hz to 10Hz 18 VP-P f = 10Hz to 1kHz 29 VRMS To VOUT = 0.1% of final value, COUT = 50pF 400 s INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load TA = +25C 12.0 40.0 340 TA = -40C to +125C 550 700 V A TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient Note 1: Note 2: Note 3: Note 4: 6 VTEMP 630 mV TCTEMP 2.1 mV/C All devices are 100% production tested at TA = +25C and guaranteed by design over TA = TMIN to TMAX, as specified. Temperature coefficient is defined as VOUT divided by the temperature range. Line and load regulation specifications do not include the effects of self-heating. Thermal hysteresis is defined as the change in +25C output voltage before and after cycling the device from TMAX to TMIN. _______________________________________________________________________________________ High-Precision Voltage References with Temperature Sensor (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.) 10.001 OUTPUT VOLTAGE (V) 2.499 9.997 9.996 9.994 THREE TYPICAL PARTS -25 0 25 50 75 100 125 TA = +25C 0 -0.25 TA = +125C -50 -25 0 25 50 75 100 -0.50 125 0 5 10 15 20 25 TEMPERATURE (C) TEMPERATURE (C) SOURCE CURRENT (mA) LOAD REGULATION vs. SOURCE CURRENT (VOUT = 10V) LOAD REGULATION vs. SINK CURRENT (VOUT = 2.5V) LOAD REGULATION vs. SINK CURRENT (VOUT = 10V) TA = +125C 0 -0.25 TA = -40C TA = +25C 0.50 TA = +125C 0.25 0 TA = -40C -0.25 -0.50 -0.50 0 5 10 15 20 25 0 30 0.5 1.0 1.5 30 MAX6173 toc06 0.75 2.0 OUTPUT VOLTAGE CHANGE (mV) 0.25 MAX6173 toc05 TA = +25C 1.00 OUTPUT VOLTAGE CHANGE (mV) MAX6173 toc04 0.50 1.5 TA = -40C 1.0 TA = +125C 0.5 0 TA = +25C -0.5 -1.0 2.0 0 0.5 1.0 1.5 2.0 SOURCE CURRENT (mA) SINK CURRENT (mA) SINK CURRENT (mA) LINE REGULATION vs. TEMPERATURE (VOUT = 2.5V) LINE REGULATION vs. TEMPERATURE (VOUT = 10V) MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 2.5V) TA = -40C 60 TA = +125C 40 20 TA = +125C 200 TA = -40C 150 100 50 10 15 20 25 INPUT VOLTAGE (V) 30 35 40 2.0 TA = +125C 1.5 TA = +25C 1.0 TA = -40C TA = +25C 0.5 0 5 MAX6173 toc09 250 TA = +25C 0 2.5 MAX6173 toc08 80 300 OUTPUT VOLTAGE CHANGE (V) MAX6173 toc07 100 0 TA = -40C 0.25 THREE TYPICAL PARTS 9.993 -50 OUTPUT VOLTAGE CHANGE (mV) 9.998 9.995 2.498 OUTPUT VOLTAGE CHANGE (V) 9.999 DROPOUT VOLTAGE (V) OUTPUT VOLTAGE (V) 2.500 10.000 0.50 MAX6173 toc03 10.002 2.501 LOAD REGULATION vs. SOURCE CURRENT (VOUT = 2.5V) MAX6173 toc02 10.003 MAX6173 toc01 2.502 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 10V) OUTPUT VOLTAGE CHANGE (mV) OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.5V) 12 16 20 24 28 32 INPUT VOLTAGE (V) 36 40 0 4 8 12 16 20 SOURCE CURRENT (mA) _______________________________________________________________________________________ 7 MAX6173-MAX6177 Typical Operating Characteristics Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.) MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 10V) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V) -40 PSRR (dB) TA = +125C TA = +25C -40 -60 -80 -60 -80 -100 TA = -40C 1.0 -100 -120 -140 0.001 0.5 0 4 8 12 16 20 0.1 1 10 100 -120 0.001 1000 0.01 0.1 1 10 100 1000 FREQUENCY (kHz) FREQUENCY (kHz) OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 2.5V) SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 2.5V) SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 10V) 1 0.1 0.01 0.001 300 TA = +25C 250 TA = -40C 200 150 0.1 1 10 100 250 TA = +25C 200 TA = -40C 150 100 50 50 1000 MAX6173 toc15 300 100 0 0.01 TA = +125C 350 SUPPLY CURRENT (A) 10 TA = +125C 350 400 MAX6173 toc14 MAX6173 toc13 400 SUPPLY CURRENT (A) 0 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 FREQUENCY (kHz) INPUT VOLTAGE (V) INPUT VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE (VOUT = 2.5V) SUPPLY CURRENT vs. TEMPERATURE (VOUT = 10V) TEMP VOLTAGE vs. TEMPERATURE (VOUT = 2.5V) 350 300 275 700 TEMP VOLTAGE (mV) SUPPLY CURRENT (A) 325 325 300 250 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125 600 500 275 250 800 40 MAX6173 toc18 375 MAX6173 toc16 350 MAX6173 toc17 OUTPUT IMPEDANCE () 0.01 SOURCE CURRENT (mA) 100 8 MAX6173 toc12 -20 PSRR (dB) DROPOUT VOLTAGE (V) 0 MAX6173 toc11 -20 2.0 1.5 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 10V) 0 MAX6173 toc10 2.5 SUPPLY CURRENT (A) MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor 400 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125 -50 -25 0 25 50 75 TEMPERATURE (C) _______________________________________________________________________________________ 100 125 High-Precision Voltage References with Temperature Sensor (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.) 600 TWO TYPICAL PARTS 2.501 2.55 2.50 2.500 2.45 2.499 500 2.40 400 2.498 2.35 -25 0 25 50 75 100 125 0 0.5 1.0 1.5 2.0 200 400 600 800 TRIM VOLTAGE (V) TIME (hours) LONG-TERM STABILITY vs. TIME (VOUT = 10.0V) OUTPUT-VOLTAGE NOISE DENSITY vs. FREQUENCY (VOUT = 2.5V) OUTPUT-VOLTAGE NOISE DENSITY vs. FREQUENCY (VOUT = 10V) 10.001 10.000 9.999 200 400 600 800 0.1 1000 1000 100 100 9.998 10,000 TIME (hours) 1 10 100 FREQUENCY (Hz) 0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 2.5V) 1000 0.1 1 10 100 FREQUENCY (Hz) 1000 0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 10V) MAX6173 toc25 MAX6173 toc26 1V/div 1s/div 1000 MAX6173 toc24 1000 OUTPUT VOLTAGE-NOISE DENSITY (nV/Hz) TWO TYPICAL PARTS MAX6173 toc23 MAX6173 toc22 10.002 0 0 2.5 TEMPERATURE (C) OUTPUT VOLTAGE-NOISE DENSITY (nV/Hz) -50 VOUT (V) 2.502 VOUT (V) 700 LONG-TERM STABILITY vs. TIME (VOUT = 2.500V) MAX6173 toc20 2.60 OUTPUT VOLTAGE (V) 800 TEMP VOLTAGE (mV) 2.65 MAX6173 toc19 900 OUTPUT VOLTAGE vs. TRIM VOLTAGE (VOUT = 2.5V) MAX6173 toc21 TEMP VOLTAGE vs. TEMPERATURE (VOUT = 10V) 4V/div 1s/div _______________________________________________________________________________________ 9 MAX6173-MAX6177 Typical Operating Characteristics (continued) MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.) LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO 20mA) LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO 20mA) MAX6173 toc28 MAX6173 toc27 20mA IOUT 20mA IOUT 0 0 VOUT AC-COUPLED 1V/div VOUT AC-COUPLED 1V/div 10s/div 10s/div LOAD TRANSIENT (VOUT = 2.5V, COUT = 1F, 0 TO +20mA) LOAD TRANSIENT (VOUT = 10V, COUT = 1F, 0 TO 20mA) MAX6173 toc29 MAX6173 toc30 20mA 20mA IOUT IOUT 0 0 VOUT AC-COUPLED 50mV/div VOUT AC-COUPLED 100mV/div 200s/div 100s/div LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO -2mA) LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO -2mA) MAX6173 toc31 MAX6173 toc32 0 0 IOUT 40s/div 10 IOUT -2mA -2mA VOUT AC-COUPLED 200mV/div VOUT AC-COUPLED 20mV/div 200s/div ______________________________________________________________________________________ High-Precision Voltage References with Temperature Sensor (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.) LOAD TRANSIENT (VOUT = 2.5V, COUT = 1F, 0 TO -2mA) LOAD TRANSIENT (VOUT = 10V, COUT = 1F, 0 TO -2mA) MAX6173 toc33 MAX6173 toc34 0 0 IOUT IOUT -2mA -2mA VOUT AC-COUPLED 20mV/div VOUT AC-COUPLED 5mV/div 400s/div 400s/div LINE TRANSIENT (VOUT = 2.5V) LINE TRANSIENT (VOUT = 10V) MAX6173 toc35 MAX6173 toc36 5.5V 4.5V 15.5V VIN 1V/div 14.5V VOUT AC-COUPLED 200mV/div VOUT AC-COUPLED 200mV/div VIN COUT = 0 10s/div 2s/div TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 0) TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 1F) MAX6173 toc37 MAX6173 toc38 VIN 2V/div VIN 2V/div GND GND VOUT 1V/div VOUT 1V/div GND COUT = 0 10s/div GND 40s/div ______________________________________________________________________________________ 11 MAX6173-MAX6177 Typical Operating Characteristics (continued) MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.) TURN-ON TRANSIENT (VOUT = 10V, COUT = 0) TURN-ON TRANSIENT (VOUT = 10V, COUT = 1F) MAX6173 toc39 MAX6173 toc40 VIN 5V/div VIN 5V/div GND GND VOUT 5V/div VOUT 5V/div GND GND 100s/div 200s/div Pin Description PIN NAME FUNCTION 1, 8 I.C. Internally Connected. Do not connect externally. 2 IN Positive Power-Supply Input 3 TEMP Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die temperature. 4 GND Ground 5 TRIM Output Voltage Trim. Connect TRIM to the center of a voltage-divider between OUT and GND for trimming. Leave unconnected to use the preset output voltage. 6 OUT Output Voltage 7 N.C. No Connection. Not internally connected. Detailed Description The MAX6173-MAX6177 precision voltage references provide accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages from up to +40V input voltages. These devices feature a proprietary temperaturecoefficient curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low 3ppm/C temperature coefficient and excellent 0.05% initial accuracy. The MAX6173-MAX6177 draw 340A of supply current and source 30mA or sink 2mA of load current. Trimming the Output Voltage Trim the factory-preset output voltage on the MAX6173-MAX6177 by placing a resistive divider network between OUT, TRIM, and GND. 12 Use the following formula to calculate the change in output voltage from its preset value: VOUT = 2 x (VTRIM - VTRIM (open)) x k where: VTRIM = 0V to VOUT VTRIM (open) = VOUT (nominal) / 2 (typ) k = 6% (typ) For example, use a 50k potentiometer (such as the MAX5436) between OUT, TRIM, and GND with the potentiometer wiper connected to TRIM (see Figure 2). As the TRIM voltage changes from VOUT to GND, the output voltage changes accordingly. Set R2 to 1M or less. Currents through resistors R1 and R2 add to the quiescent supply current. ______________________________________________________________________________________ High-Precision Voltage References with Temperature Sensor n = VTEMP (at TJ = T0 ) 1.9mV / K T0 supply can experience step changes, a larger output capacitor reduces the amount of overshoot (undershoot) and improves the circuit's transient response. Place output capacitors as close to the devices as possible for best performance. Supply Current The MAX6173-MAX6177 consume 320A (typ) of quiescent supply current. This improved efficiency reduces power dissipation and extends battery life. Thermal Hysteresis TA = the ambient temperature. Self-heating affects the die temperature and conversely, the TEMP output. The TEMP equation assumes the output is not loaded. If device power dissipation is negligible, then TJ TA. Applications Information Bypassing/Output Capacitance For the best line-transient performance, decouple the input with a 0.1F ceramic capacitor as shown in the Typical Operating Circuit. Place the capacitor as close to IN as possible. When transient performance is less important, no capacitor is necessary. The MAX6173-MAX6177 do not require an output capacitor for stability and are stable with capacitive loads up to 100F. In applications where the load or the Thermal hysteresis is the change in the output voltage at TA = +25C before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the bandgap core transistors. The typical thermal hysteresis value is 120ppm. Turn-On Time The MAX6173-MAX6177 typically turn on and settle to within 0.1% of the preset output voltage in 150s (2.5V output). The turn-on time can increase up to 150s with the device operating with a 1F load. Short-Circuited Outputs The MAX6173-MAX6177 feature a short-circuit-protected output. Internal circuitry limits the output current to 60mA when short circuiting the output to ground. The output current is limited to 3mA when short circuiting the output to the input. 10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/C) 8-BIT 10 10-BIT 12-BIT 1 14-BIT 16-BIT 0.1 18-BIT 0.01 1 10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (C) 20-BIT 100 Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error ______________________________________________________________________________________ 13 MAX6173-MAX6177 Temp Output The MAX6173-MAX6177 provide a temperature output proportional to die temperature. TEMP can be calculated from the following formula: TEMP (V) = TJ (K) x n where TJ = the die temperature, n = the temperature multiplier, MAX6173-MAX6177 High-Precision Voltage References with Temperature Sensor Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error In a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range. Figure 1 shows the maximum allowable reference-voltage temperature coefficient to keep the conversion error to less than 1 LSB, as a function of the operating temperature range (TMAX - TMIN) with the converter resolution as a parameter. The graph assumes the reference-voltage temperature coefficient as the only parameter affecting accuracy. In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltagereference changes. ( VOUT + 2V) TO 40V INPUT IN REFERENCE OUTPUT OUT * MAX6173-MAX6177 TEMP MAX5436 50k POTENTIOMETER TRIM GND *OPTIONAL. Figure 2. Applications Circuit Using the MAX5436 Potentiometer Pin Configuration TRANSISTOR COUNT: 429 PROCESS: BiCMOS TOP VIEW I.C.* 1 8 I.C.* IN 2 7 N.C. TEMP 3 6 OUT 5 TRIM MAX6173- MAX6177 GND 4 SO *INTERNALLY CONNECTED. DO NOT CONNECT. 14 Chip Information Package Information (For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. 8 SO S8+2 21-0041 ______________________________________________________________________________________ LAND PATTERN NO. 90-0096 High-Precision Voltage References with Temperature Sensor REVISION NUMBER REVISION DATE 0 6/04 Initial release 1 2/11 Added automotive grade part, lead-free information, and soldering temperature DESCRIPTION PAGES CHANGED -- 1, 2 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX6173-MAX6177 Revision History