19-3168; Rev 1; 4/04 High-Precision Voltage Reference with Temperature Sensor Features ♦ Wide (VOUT + 2V) to +40V Supply Voltage Range ♦ Excellent Temperature Stability: 3ppm/°C (max) ♦ Tight Initial Accuracy: 0.05% (max) ♦ Low Noise: 3.8µVP-P (typ at 2.5V Output) ♦ Sources up to 30mA Output Current ♦ Low Supply Current: 450µA (max at +25°C) ♦ Low 0.01µA Shutdown Current ♦ Linear Temperature Transducer Voltage Output ♦ +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output Voltages ♦ Wide Operating Temperature Range: -40°C to +125°C ♦ No External Capacitors Required for Stability Typical Operating Circuit ( VOUT + 2V) TO 40V INPUT IN SHDN * REFERENCE OUTPUT OUT * MAX6143 TEMP TRIM GND *OPTIONAL. * Applications A/D Converters Voltage Regulators D/A Converters Threshold Detectors Digital Voltmeters Pin Configuration appears at end of data sheet. Ordering Information/Selector Guide TEMP RANGE PINPACKAGE OUTPUT VOLTAGE (V) MAX6143AASA25 -40°C to +125°C 8 SO 2.500 3 0.06 MAX6143BASA25 -40°C to +125°C 8 SO 2.500 10 0.10 MAX6143AASA33 -40°C to +125°C 8 SO 3.300 3 0.06 MAX6143BASA33 -40°C to +125°C 8 SO 3.300 10 0.10 MAX6143AASA41 -40°C to +125°C 8 SO 4.096 3 0.06 MAX6143BASA41 -40°C to +125°C 8 SO 4.096 10 0.10 MAX6143AASA50 -40°C to +125°C 8 SO 5.000 3 0.06 MAX6143BASA50 -40°C to +125°C 8 SO 5.000 10 0.10 MAX6143AASA10 -40°C to +125°C 8 SO 10.000 3 0.05 MAX6143BASA10 -40°C to +125°C 8 SO 10.000 10 0.10 PART TEMPERATURE COEFFICIENT (ppm/°C) 40°C TO +125°C INITIAL ACCURACY (%) ________________________________________________________________ Maxim Integrated Products 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. 1 MAX6143 General Description The MAX6143 is a low-noise, high-precision voltage reference. The device features a proprietary temperaturecoefficient curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low 3ppm/°C temperature coefficient and excellent ±0.06% initial accuracy. The MAX6143 provides a TEMP output where the output voltage is proportional to die temperature, making the device suitable for a wide variety of temperature-sensing applications. The device also provides a TRIM input, allowing fine trimming of the output voltage with a resistive-divider network. Low temperature drift and low noise make the MAX6143 ideal for use with high-resolution A/D or D/A converters. The MAX6143 provides accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages and accepts input voltages up to +40V. The device draws 340µA of supply current and sources 30mA or sinks 2mA of load current. The active-low shutdown feature (SHDN) reduces supply current to 0.01µA. The MAX6143 uses bandgap technology for low-noise performance and excellent accuracy. The MAX6143 does not require an output bypass capacitor for stability, and is stable with capacitive loads up to 100µF. Eliminating the output bypass capacitor saves valuable board area in spacecritical applications. The MAX6143 is available in an 8-pin SO package and operates over the automotive (-40°C to +125°C) temperature range. MAX6143 High-Precision Voltage Reference with Temperature Sensor ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +42V OUT, SHDN, TRIM, TEMP to GND...............-0.3V to (VIN + 0.3V) Output Short Circuit to GND .....................................................5s Continuous Power Dissipation (TA = +70°C) 8-Pin SO (derate 5.9mW/°C above +70°C) ..................471mW Operating Temperature Range ........................-40°C to +125°C Junction Temperature .....................................................+150°C Storage Temperature Range ............................-65°C to +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 CHARACTERISTICS—MAX6143_25 (VOUT = 2.5V) (VIN = V SHDN = +5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6143A_25 (0.06%) 2.4985 2.5 2.5015 MAX6143B_25 (0.1%) 2.4975 2.5 2.5025 ±3 ±6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25°C Output Adjustment Range ∆VTRIM RPOT = 10kΩ Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40°C to +125°C 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 Sourcing: 0 ≤ IOUT ≤ 10mA Sinking: -0.6mA ≤ IOUT ≤ 0 V % MAX6143AASA 1.5 3 MAX6143BASA 3 10 TA = +25°C 0.6 5 TA = -40°C to +125°C 0.8 10 ppm/°C TA = +25°C 2 10 TA = -40°C to +125°C 2 15 TA = +25°C 50 500 90 900 TA = -40°C to +125°C OUT shorted to GND 60 OUT shorted to IN 3 ppm/V ppm/mA mA 120 ppm 1000 hours at TA = +25°C 50 ppm f = 0.1Hz to 10Hz 3.8 µVP-P f = 10Hz to 1kHz 6.8 µVRMS To VOUT = 0.1% of final value, COUT = 50pF 150 µs DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load, normal operation Shutdown Supply Current ISHDN 2 No load, VSHDN < 0.8V TA = +25°C 4.5 40.0 300 TA = -40°C to +125°C TA = -40°C to +125°C 450 600 0.01 _______________________________________________________________________________________ 5 V µA µA High-Precision Voltage Reference with Temperature Sensor MAX6143 ELECTRICAL CHARACTERISTICS—MAX6143_25 (VOUT = 2.5V) (continued) (VIN = V SHDN = +5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VIH Logic-Low Input Voltage VIL 2.0 0.8 V V Logic-High Input Current IIH 20 µA Logic-Low Input Current IIL 2 µA TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP 570 mV TCTEMP 1.9 mV/°C ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V) (VIN = V SHDN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6143A_33 (0.06%) 3.2980 3.3 3.3020 MAX6143B_33 (0.1%) 3.2967 3.3 3.3033 ±3 ±6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25°C Output Adjustment Range ∆VTRIM RPOT = 10kΩ Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40°C to +125°C Line Regulation (Note 3) ∆VOUT / ∆VIN Load Regulation (Note 3) ∆VOUT / ∆IOUT Output Short-Circuit Current ISC Temperature Hysteresis (Note 4) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time 5.3V ≤ VIN ≤ 40V Sourcing: 0 ≤ IOUT ≤ 10mA Sinking: -0.6mA ≤ IOUT ≤ 0 V % MAX6143AASA 1.5 3 MAX6143BASA 3 10 ppm/°C TA = +25°C 0.6 5 TA = -40°C to +125°C 0.8 10 10 TA = +25°C 2 TA = -40°C to +125°C 2 15 TA = +25°C 50 500 90 900 TA = -40°C to +125°C OUT shorted to GND 60 OUT shorted to IN 3 ppm/V ppm/ mA mA 120 ppm 50 ppm 5 µVP-P f = 10Hz to 1kHz 9.3 µVRMS To VOUT = 0.1% of final value, COUT = 50pF 180 µs 1000 hours at TA = +25°C DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR f = 0.1Hz to 10Hz _______________________________________________________________________________________ 3 MAX6143 High-Precision Voltage Reference with Temperature Sensor ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V) (continued) (VIN = V SHDN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 40.0 V INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load, normal operation Shutdown Supply Current ISHDN 5.3 TA = +25°C 320 TA = -40°C to +125°C No load, VSHDN < 0.8V 500 650 TA = -40°C to +125°C 0.01 µA 5 µA SHUTDOWN (SHDN) Logic-High Input Voltage VIH Logic-Low Input Voltage VIL 2.0 0.8 V V Logic-High Input Current IIH 20 µA Logic-Low Input Current IIL 2 µA TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP 630 mV TCTEMP 2.1 mV/°C ELECTRICAL CHARACTERISTICS—MAX6143_41 (VOUT = 4.096V) (VIN = V SHDN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6143A_41 (0.06%) 4.0935 4.096 4.0985 MAX6143B_41 (0.1%) 4.0919 4.096 4.1001 UNITS OUTPUT Output Voltage Output Adjustment Range VOUT ∆VTRIM No load, TA = +25°C RPOT = 10kΩ Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40°C to +125°C Line Regulation (Note 3) ∆VOUT/ ∆VIN 6.1V ≤ VIN ≤ 40V Load Regulation (Note 3) ∆VOUT/ ∆IOUT Output Short-Circuit Current ISC Temperature Hysteresis (Note 4) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time 4 Sourcing: 0 ≤ IOUT ≤ 10mA Sinking: -0.6mA ≤ IOUT ≤ 0 ±3 % ±6 MAX6143AASA 1.5 3 MAX6143BASA 3 10 TA = +25°C 0.6 5 TA = -40°C to +125°C 0.8 10 10 TA = +25°C 2 TA = -40°C to +125°C 2 15 TA = +25°C 50 500 90 900 TA = -40°C to +125°C OUT shorted to GND 60 OUT shorted to IN 3 1000 hours at TA = +25°C V ppm/°C ppm/V ppm/mA mA 120 ppm 50 ppm _______________________________________________________________________________________ High-Precision Voltage Reference with Temperature Sensor (VIN = V SHDN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR f = 0.1Hz to 10Hz 7 µVP-P f = 10Hz to 1kHz 11.5 µVRMS To VOUT = 0.1% of final value, COUT = 50pF 200 µs INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load, normal operation Shutdown Supply Current ISHDN 6.1 TA = +25°C 40.0 320 TA = -40°C to +125°C No load, VSHDN < 0.8V 500 650 TA =-40°C to +125°C 0.01 V µA 5 µA SHUTDOWN (SHDN) Logic-High Input Voltage VIH Logic-Low Input Voltage VIL 2.0 0.8 V V Logic-High Input Current IIH 20 µA Logic-Low Input Current IIL 2 µA TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP TCTEMP (0.06%) 630 mV 2.1 mV/°C ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V) (VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6143A_50 (0.06%) 4.9970 5.0 5.0030 MAX6143B_50 (0.1%) 4.9950 5.0 5.0050 ±3 ±6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25°C Output Adjustment Range ∆VTRIM RPOT = 10kΩ Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40°C to +125°C Line Regulation (Note 3) ∆VOUT / ∆VIN Load Regulation (Note 3) ∆VOUT / ∆IOUT 7V ≤ VIN ≤ 40V Sourcing: 0 ≤ IOUT ≤ 10mA Sinking: -0.6mA ≤ IOUT ≤ 0 V % MAX6143AASA 1.5 3 MAX6143BASA 3 10 ppm/°C TA = +25°C 0.6 5 TA = -40°C to +125°C 0.8 10 10 TA = +25°C 2 TA = -40°C to +125°C 2 15 TA = +25°C 50 500 TA = -40°C to +125°C 90 900 ppm/V ppm/mA _______________________________________________________________________________________ 5 MAX6143 ELECTRICAL CHARACTERISTICS—MAX6143_41 (VOUT = 4.096V) (continued) MAX6143 High-Precision Voltage Reference with Temperature Sensor ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V) (continued) (VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Output Short-Circuit Current ISC Temperature Hysteresis (Note 4) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time CONDITIONS MIN TYP OUT shorted to GND 60 OUT shorted to IN 3 1000 hours at TA = +25°C MAX UNITS mA 120 ppm 50 ppm DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR f = 0.1Hz to 10Hz 9 µVP-P f = 10Hz to 1kHz 14.5 µVRMS To VOUT = 0.1% of final value, COUT = 50pF 230 µs INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Shutdown Supply Current ISHDN Guaranteed by line regulation test 7 TA = +25°C No load, normal operation 40 320 TA = -40°C to +125°C No load, VSHDN < 0.8V 550 700 TA = -40°C to +125°C 0.01 V µA 5 µA SHUTDOWN (SHDN) Logic-High Input Voltage VIH Logic-Low Input Voltage VIL 2.0 0.8 V V Logic-High Input Current IIH 20 µA Logic-Low Input Current IIL 2 µA TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP 630 mV TCTEMP 2.1 mV/°C ELECTRICAL CHARACTERISTICS—MAX6143_10 (VOUT = 10V) (VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6143A_10 (0.05%) 9.995 10.0 10.005 MAX6143B_10 (0.1%) 9.990 10.0 10.010 ±3 ±6 UNITS OUTPUT Output Voltage VOUT No load, TA = +25°C Output Adjustment Range ∆VTRIM RPOT = 10kΩ Output-Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40°C to +125°C Line Regulation (Note 3) ∆VOUT/ ∆VIN 6 12V ≤ VIN ≤ 40V V % MAX6143AASA 1.5 3 MAX6143BASA 3 10 TA = +25°C 0.6 5 TA = -40°C to +125°C 0.8 10 ppm/°C _______________________________________________________________________________________ ppm/V High-Precision Voltage Reference with Temperature Sensor (VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Load Regulation (Note 3) Output Short-Circuit Current SYMBOL ∆VOUT/ ∆IOUT ISC Temperature Hysteresis (Note 4) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time CONDITIONS Sourcing: 0 ≤ IOUT ≤ 10mA Sinking: -0.6mA ≤ IOUT ≤ 0 TYP MAX TA = +25°C MIN 2 10 TA = -40°C to +125°C 2 15 TA = +25°C 50 500 90 900 TA = -40°C to +125°C OUT shorted to GND 60 OUT shorted to IN 3 UNITS ppm/mA mA 120 ppm 1000 hours at TA = +25°C 50 ppm f = 0.1Hz to 10Hz 18 µVP-P f = 10Hz to 1kHz 29 µVRMS To VOUT = 0.1% of final value, COUT = 50pF 400 µs DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load, normal operation Shutdown Supply Current ISHDN No load, VSHDN < 0.8V 12 TA = +25°C 40 340 TA = -40°C to +125°C 550 700 TA = -40°C to +125°C 0.01 5 V µA µA SHUTDOWN (SHDN) Logic-High Input Voltage VIH 2.0 V Logic-Low Input Voltage VIL 0.8 V Logic-High Input Current IIH 20 µA Logic-Low Input Current IIL 2 µA TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient Note 1: Note 2: Note 3: Note 4: VTEMP 630 mV TCTEMP 2.1 mV/°C All devices are 100% production tested at TA = +25°C 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 +25°C output voltage before and after cycling the device from TMAX to TMIN. _______________________________________________________________________________________ 7 MAX6143 ELECTRICAL CHARACTERISTICS—MAX6143_10 (VOUT = 10V) (continued) Typical Operating Characteristics (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) 10.001 OUTPUT VOLTAGE (V) 2.499 9.998 9.997 9.996 9.995 9.994 THREE TYPICAL PARTS 2.498 -25 0 25 50 75 100 125 -50 0 -0.25 TA = +125°C -25 0 25 50 75 100 -0.50 125 0 5 10 15 20 25 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 = +125°C 0 -0.25 TA = -40°C TA = +25°C 0.50 TA = +125°C 0.25 0 TA = -40°C -0.25 -0.50 0 5 10 15 20 25 30 30 MAX6143toc06 MAX6143toc05 0.75 2.0 OUTPUT VOLTAGE CHANGE (mV) 0.25 OUTPUT VOLTAGE CHANGE (mV) MAX6143toc04 TA = +25°C 1.00 -0.50 1.5 TA = -40°C 1.0 TA = +125°C 0.5 0 TA = +25°C -0.5 -1.0 0 0.5 1.0 1.5 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 = -40°C 60 TA = +125°C 40 20 TA = +125°C 200 TA = -40°C 150 100 50 10 15 20 25 INPUT VOLTAGE (V) 30 35 40 2.0 TA = +125°C 1.5 TA = +25°C 1.0 TA = -40°C TA = +25°C 0.5 0 5 MAX6143toc09 250 TA = +25°C 0 2.5 MAX6143toc08 80 300 OUTPUT VOLTAGE CHANGE (µV) MAX6143toc07 100 8 TA = +25°C TEMPERATURE (°C) 0.50 0 TA = -40°C 0.25 THREE TYPICAL PARTS 9.993 -50 OUTPUT VOLTAGE CHANGE (mV) 9.999 DROPOUT VOLTAGE (V) OUTPUT VOLTAGE (V) 2.500 10.000 0.50 MAX6143toc03 10.002 2.501 LOAD REGULATION vs. SOURCE CURRENT (VOUT = 2.5V) MAX6143toc02 10.003 MAX6143toc01 2.502 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 10V) OUTPUT VOLTAGE CHANGE (mV) OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.5V) OUTPUT VOLTAGE CHANGE (µV) MAX6143 High-Precision Voltage Reference with Temperature Sensor 12 16 20 24 28 32 INPUT VOLTAGE (V) 36 40 0 4 8 12 SOURCE CURRENT (mA) _______________________________________________________________________________________ 16 20 High-Precision Voltage Reference with Temperature Sensor MAX6143 Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V) -20 -40 PSRR (dB) TA = +125°C 1.5 -20 TA = +25°C -40 PSRR (dB) DROPOUT VOLTAGE (V) 2.0 0 MAX6143toc11 0 MAX6143toc10 2.5 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 10V) -60 -80 -60 -80 -100 TA = -40°C 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 = +25°C 250 TA = -40°C 200 150 0.1 1 10 100 250 TA = +25°C 200 TA = -40°C 150 100 50 50 1000 MAX6143toc15 300 100 0 0.01 TA = +125°C 350 SUPPLY CURRENT (µA) 10 TA = +125°C 350 400 MAX6143toc14 MAX6143toc13 400 SUPPLY CURRENT (µA) 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) SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE (VOUT = 2.5V) 300 275 325 300 275 250 250 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 100 SHUTDOWN CURRENT (nA) 350 SUPPLY CURRENT (µA) 325 40 MAX6143toc18 375 MAX6143toc16 350 MAX6143toc17 OUTPUT IMPEDANCE (Ω) 0.01 SOURCE CURRENT (mA) 100 SUPPLY CURRENT (µA) MAX6143toc12 MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 10V) 10 1 0.1 0.01 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) _______________________________________________________________________________________ 9 Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) 800 1 0.1 TEMP VOLTAGE (mV) 700 TEMP VOLTAGE (mV) 10 900 MAX6143toc20 MAX6143toc19 800 TEMP VOLTAGE vs. TEMPERATURE (VOUT = 10V) 600 500 0.01 400 -25 0 25 50 75 100 125 400 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT VOLTAGE vs. TRIM VOLTAGE (VOUT = 2.5V) LONG-TERM STABILITY vs. TIME (VOUT = 2.500V) LONG-TERM STABILITY vs. TIME (VOUT = 10.0V) 2.502 MAX6143toc22 2.65 2.60 TWO TYPICAL PARTS 125 10.002 TWO TYPICAL PARTS 10.001 2.501 OUTPUT VOLTAGE (V) 600 MAX6143toc24 -50 700 500 MAX6143toc23 SHUTDOWN CURRENT (nA) 100 TEMP VOLTAGE vs. TEMPERATURE (VOUT = 2.5V) MAX6143toc21 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE (VOUT = 10V) 2.50 VOUT (V) VOUT (V) 2.55 2.500 10.000 2.45 9.999 2.499 2.40 2.35 0.5 1.0 1.5 2.0 2.5 0 200 400 600 800 1000 0 200 400 600 TIME (hours) TIME (hours) OUTPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY (VOUT = 2.5V) OUTPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY (VOUT = 10V) 0.1Hz TO 10Hz OUTPUT NOISE 1 10 100 FREQUENCY (Hz) 1000 1000 MAX6143toc27 MAX6143toc26 OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz) MAX6143toc25 10,000 1000 1µV/div 100 100 0.1 800 TRIM VOLTAGE (V) 1000 10 9.998 2.498 0 OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz) MAX6143 High-Precision Voltage Reference with Temperature Sensor 0.1 1 10 100 FREQUENCY (Hz) 1000 ______________________________________________________________________________________ 1s/div High-Precision Voltage Reference with Temperature Sensor LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO 20mA) 0.1Hz TO 10Hz OUTPUT NOISE LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO 20mA) MAX6413toc29 MAX6143toc28 MAX6413toc30 20mA IOUT 20mA IOUT 0 0 4µV/div VOUT AC-COUPLED 1V/div 10µs/div 1s/div LOAD TRANSIENT (VOUT = 2.5V, COUT = 1µF, 0 TO +20mA) 10µs/div LOAD TRANSIENT (VOUT = 10V, COUT = 1µF, 0 TO 20mA) MAX6413toc31 VOUT AC-COUPLED 1V/div LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO -2mA) MAX6413toc32 MAX6413toc33 20mA 0 20mA IOUT IOUT IOUT 0 0 -2mA VOUT AC-COUPLED 50mV/div VOUT AC-COUPLED 100mV/div VOUT AC-COUPLED 200mV/div 200µs/div 100µs/div 40µs/div LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO -2mA) LOAD TRANSIENT (VOUT = 2.5V, COUT = 1µF, 0 TO -2mA) LOAD TRANSIENT (VOUT = 10V, COUT = 1µF, 0 TO -2mA) MAX6413toc34 MAX6413toc36 MAX6413toc35 0 0 0 IOUT IOUT -2mA -2mA -2mA VOUT AC-COUPLED 20mV/div VOUT AC-COUPLED 20mV/div VOUT AC-COUPLED 5mV/div IOUT 200µs/div 400µs/div 400µs/div ______________________________________________________________________________________ 11 MAX6143 Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) MAX6143 High-Precision Voltage Reference with Temperature Sensor Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) LINE TRANSIENT (VOUT = 2.5V) TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 0) LINE TRANSIENT (VOUT = 10V) MAX6413toc37 MAX6413toc38 5.5V MAX6413toc39 15.5V VIN 1V/div 14.5V VIN 4.5V VIN 2V/div GND VOUT AC-COUPLED 200mV/div VOUT AC-COUPLED 200mV/div VOUT 1V/div GND COUT = 0 COUT = 0 2µs/div 10µs/div TURN-ON TRANSIENT (VOUT = 10V, COUT = 0) TURN-ON TRANSIENT (VOUT = 10V, COUT = 1µF) 10µs/div TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 1µF) MAX6413toc41 MAX6413toc40 MAX6413toc42 VIN 5V/div VIN 2V/div VIN 5V/div GND GND GND VOUT 5V/div VOUT 5V/div GND GND VOUT 1V/div GND 100µs/div 40µs/div SHUTDOWN TRANSIENT (VOUT = 2.5V, VIN = 5V, COUT = 0) 200µs/div SHUTDOWN TRANSIENT (VOUT = 2.5V, VIN = 5V, COUT = 1µF) MAX6413toc43 MAX6413toc44 +5V VSHDN 2V/div VSHDN 2V/div GND GND VOUT 1V/div VOUT 1V/div GND GND 10µs/div 12 40µs/div ______________________________________________________________________________________ High-Precision Voltage Reference with Temperature Sensor SHUTDOWN TRANSIENT (VOUT = 10V, VIN = 15V, COUT = 0) SHUTDOWN TRANSIENT (VOUT = 10V, VIN = 15V, COUT = 1µF) MAX6413toc45 MAX6143toc46 VSHDN 5V/div VSHDN 5V/div GND GND VOUT 5V/div VOUT 5V/div GND GND 100µs/div 100µs/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 SHDN Active-Low Shutdown. Connect SHDN to IN for normal operation. ∆VOUT = 2 x (VTRIM - VTRIM (open)) x k Detailed Description The MAX6143 precision voltage reference provides 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 temperature-coefficient curvature-correction circuit and laser-trimmed thinfilm resistors that result in a very low 3ppm/°C temperature coefficient and excellent 0.05% initial accuracy. The MAX6143 draws 340µA of supply current and sources 30mA or sinks 2mA of load current. Trimming the Output Voltage Trim the factory-preset output voltage on the MAX6143 by placing a resistive-divider network between OUT, TRIM, and GND. Use the following formula to calculate the change in output voltage from its preset value: where: VTRIM = 0 to VOUT VTRIM (open) = VOUT (nominal) / 2 (typ) k = ±6% typ For example, use a 50kΩ 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 1MΩ or less. Currents through resistors R1 and R2 add to the quiescent supply current. ______________________________________________________________________________________ 13 MAX6143 Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) MAX6143 High-Precision Voltage Reference with Temperature Sensor Temp Output Supply Current The MAX6143 provides 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, The MAX6143 consumes 340µA of quiescent supply current. This improved efficiency reduces power dissipation and extends battery life. n = VTEMP (at TJ = T0 ) ≅ 1.9mV / °K T0 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 0.1µF 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 MAX6143 does not require an output capacitor for stability and is stable with capacitive loads up to 100µF. In applications where the load or the 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 device as possible for best performance. Shutdown The active-low shutdown feature reduces supply current to 0.01µA (typ), further extending battery life. Connect SHDN to GND to activate shutdown. Connect SHDN to IN for normal operation. Thermal Hysteresis Thermal hysteresis is the change in the output voltage at TA = +25°C 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 MAX6143 typically turns on and settles to within 0.1% of the preset output voltage in 150µs (2.5V output). The turn-on time can increase up to 150µs with the device operating at a 1µF load. Short-Circuited Outputs The MAX6143 features 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 14 ______________________________________________________________________________________ High-Precision Voltage Reference with Temperature Sensor 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. MAX6143 Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error ( VOUT + 2V) TO 40V INPUT IN SHDN * OUT REFERENCE OUTPUT MAX6143 TEMP TRIM MAX5436 50kΩ POTENTIOMETER GND *OPTIONAL. Figure 2. Applications Circuit Using the MAX5436 Potrntiometer Pin Configuration Chip Information TRANSISTOR COUNT: 429 PROCESS: BiCMOS TOP VIEW I.C.* 1 8 I.C.* IN 2 7 SHDN 3 6 OUT GND 4 5 TRIM MAX6143 TEMP SO *INTERNALLY CONNECTED. DO NOT CONNECT. ______________________________________________________________________________________ 15 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX6143 High-Precision Voltage Reference with Temperature Sensor 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0∞-8∞ A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.