19-2428; Rev 0; 4/02 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference Features ♦ Ultra-Small, 3-Pin SC70 Package The MAX6034 family of series-mode voltage references typically draw only 90µA of supply current and can source 1mA and sink 200µA of load current. Unlike conventional shunt-mode (two terminal) references that waste supply current and require an external resistor, devices in the MAX6034 family offer supply current that is virtually independent of supply voltage (16µA/V, max variation) and do not require an external resistor. These internally compensated devices do not require an external compensation capacitor, but are stable with up to 1µF of load capacitance. Eliminating the external compensation capacitor saves valuable board space in space-critical applications. The low dropout voltage and supply-independent, ultra-low supply current make the MAX6034 ideal for battery-powered applications. ♦ No Output Capacitor Needed Applications Hand-Held Equipment ♦ ±0.2% (max) Initial Accuracy ♦ 30ppm/°C (max) Temperature Coefficient ♦ 90µA Supply Current ♦ 200mV (max) Dropout Voltage at 1mA Load Current ♦ Stable with CLOAD = 0 to 1µF Ordering Information PART PINPACKAGE TEMP RANGE TOP MARK MAX6034AEXR21-T -40°C to +85°C 3 SC70-3 AJH MAX6034BEXR21-T -40°C to +85°C 3 SC70-3 AJM MAX6034AEXR25-T -40°C to +85°C 3 SC70-3 AJI MAX6034BEXR25-T -40°C to +85°C 3 SC70-3 AJN MAX6034AEXR30-T -40°C to +85°C 3 SC70-3 AJJ MAX6034BEXR30-T -40°C to +85°C 3 SC70-3 AJO MAX6034AEXR33-T -40°C to +85°C 3 SC70-3 AJK MAX6034BEXR33-T -40°C to +85°C 3 SC70-3 AJP MAX6034AEXR41-T -40°C to +85°C 3 SC70-3 AJL MAX6034BEXR41-T -40°C to +85°C 3 SC70-3 AJQ Data-Acquisition Systems Industrial and Process Control Systems Selector Guide Battery-Operated Equipment VOUT PART Hard-Disk Drives Typical Operating Circuit +SUPPLY INPUT (SEE SELECTOR GUIDE) MAX6034_EXR21-T 2.048 2.5 to 5.5 MAX6034_EXR25-T 2.500 (VOUT + 200mV) to 5.5 MAX6034_EXR30-T 3.000 (VOUT + 200mV) to 5.5 MAX6034_EXR33-T 3.300 (VOUT + 200mV) to 5.5 MAX6034_EXR41-T 4.096 (VOUT + 200mV) to 5.5 Pin Configuration IN OUT * INPUT VOLTAGE (V) REFERENCE OUT TOP VIEW MAX6034 IN 1 GND MAX6034 3 GND OUT 2 *CAPACITOR IS OPTIONAL. SC70 ________________________________________________________________ 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 MAX6034 General Description The MAX6034 family of precision, low-dropout, micropower voltage references are available in the miniature 3-pin SC70 surface-mount package. They feature a proprietary temperature coefficient curvature-correction circuit and laser-trimmed, thin-film resistors that result in a low temperature coefficient of 30ppm/°C (max) and initial accuracy of ±0.20% (max). These devices are available over the extended temperature range of -40°C to +85°C. MAX6034 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................+300°C (Voltages Referenced to GND) IN ...........................................................................-0.3V to +6.0V OUT .............................................................-0.3V to (VIN + 0.3V) Output Short Circuit to GND or IN..............................Continuous Continuous Power Dissipation (TA = +70°C) 3-Pin SC70 (derate 2.9mW/°C above +70°C) .............235mW 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–MAX6034_21 (VOUT = 2.048V) (VIN = 2.7V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6034A_21 (±0.2%) 2.044 2.048 2.052 MAX6034B_21 (±0.4%) 2.040 2.048 2.056 MAX6034A_21 7 30 MAX6034B_21 7 75 2.5V ≤ VIN ≤ 5.5V 33 220 Sourcing: 0 ≤ IOUT ≤ 1mA 0.25 1.0 Sinking: 0 ≤ IOUT ≤ 200µA 2.1 62 Short to GND 12 Short to IN 4 UNITS OUTPUT Output Voltage VOUT Output Voltage Temperature Coefficient (Note 2) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT OUT Short-Circuit Current ISC TA = +25°C V ppm/°C µV/V mV/mA mA Temperature Hysteresis ∆VOUT/ cycle (Note 3) 100 ppm Long-Term Stability ∆VOUT/ time 1000hr at TA = +25°C 90 ppm/ 1000hr f = 0.1Hz to 10Hz 45 µVP-P DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT f = 10Hz to 10kHz 46 µVRMS ∆VOUT/ ∆VIN VIN = 2.7V ±100mV, f = 120Hz 80 dB tR To VOUT = 0.1% of final value, COUT = 50pF 85 µs COUT (Note 4) 0 1 µF 2.5 5.5 V 85 115 µA 4.1 16 µA/V INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current Per Change in Input Voltage 2 ∆IIN/∆VIN Guaranteed by line-regulation test 2.5V ≤ VIN ≤ 5.5V _______________________________________________________________________________________ Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference (VIN = 2.7V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage VOUT Output Voltage Temperature Coefficient (Note 2) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT OUT Short-Circuit Current ISC VIN VOUT Dropout Voltage MAX6034A_25 (±0.2%) 2.495 2.500 2.505 MAX6034B_25 (±0.4%) 2.490 2.500 2.510 MAX6034A_25 7 30 MAX6034B_25 7 75 (VOUT + 200mV) ≤ VIN ≤ 5.5V 40 250 Sourcing: 0 ≤ IOUT ≤ 1mA 0.22 1.0 Sinking: 0 ≤ IOUT ≤ 200µA 2.5 8 Short to GND 12 Short to IN 4 IOUT = 1mA (Note 5) 70 TA = +25°C V ppm/°C µV/V mV/mA mA 200 mV Temperature Hysteresis ∆VOUT/ cycle (Note 3) 100 ppm Long-Term Stability ∆VOUT/ time 1000hr at TA = +25°C 90 ppm/ 1000hr f = 0.1Hz to 10Hz 55 µVP-P f = 10Hz to 10kHz 64 µVRMS ∆VOUT/ ∆VIN VIN = 2.7V ±100mV, f = 120Hz 80 dB tR To VOUT = 0.1% of final value, COUT = 50pF 140 µs DYNAMIC Noise Voltage eOUT Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range COUT (Note 4) 0 1 µF VOUT + 0.2 5.5 V 85 115 µA 4.2 16 µA/V INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current Per Change in Input Voltage ∆IIN/∆VIN Guaranteed by line-regulation test (VOUT + 200mV) ≤ VIN ≤ 5.5V _______________________________________________________________________________________ 3 MAX6034 ELECTRICAL CHARACTERISTICS–MAX6034_25 (VOUT = 2.500V) MAX6034 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference ELECTRICAL CHARACTERISTICS–MAX6034_30 (VOUT = 3.000V) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6034A_30 (±0.2%) 2.994 3.000 3.006 MAX6034B_30 (±0.4%) 2.988 MAX6034A_30 3.000 7 3.012 30 MAX6034B_30 7 75 (VOUT + 200mV) ≤ VIN ≤ 5.5V 43 280 Sourcing: 0 ≤ IOUT ≤ 1mA 0.30 1.3 Sinking: 0 ≤ IOUT ≤ 200µA 2.6 8 Short to GND 13 Short to IN 4 IOUT = 1mA (Note 5) 70 Temperature Hysteresis ∆VOUT/ cycle (Note 3) 100 ppm Long-Term Stability ∆VOUT/ time 1000hr at TA = +25°C 90 ppm/ 1000hr f = 0.1Hz to 10Hz 66 µVP-P f = 10Hz to 10kHz 80 µVRMS VIN = 5V ±100mV, f = 120Hz 76 dB To VOUT = 0.1% of final value, COUT = 50pF 165 µs OUTPUT Output Voltage VOUT Output Voltage Temperature Coefficient (Note 2) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT OUT Short-Circuit Current Dropout Voltage ISC VIN - VOUT TA = +25°C V ppm/°C µV/V mV/mA mA 200 mV DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT ∆VOUT/ ∆VIN tR COUT (Note 4) 0 1 µF VOUT + 0.2 5.5 V 95 125 µA 4.5 16 µA/V INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current Per Change in Input Voltage 4 ∆IIN/∆VIN Guaranteed by line-regulation test (VOUT + 200mV) ≤ VIN ≤ 5.5V _______________________________________________________________________________________ Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6034A_33 (±0.2%) 3.293 3.300 3.307 MAX6034B_33 (±0.4%) 3.287 3.300 3.313 MAX6034A_33 7 30 MAX6034B_33 7 75 (VOUT + 200mV) ≤ VIN ≤ 5.5V 45 300 Sourcing: 0 ≤ IOUT ≤ 1mA 0.3 1.3 Sinking: 0 ≤ IOUT ≤ 200µA 3 8.6 Short to GND 13 Short to IN 4 IOUT = 1mA (Note 5) 70 UNITS OUTPUT Output Voltage VOUT Output Voltage Temperature Coefficient (Note 2) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT OUT Short-Circuit Current Dropout Voltage ISC VIN - VOUT TA = +25°C V ppm/°C µV/V mV/mA mA 200 mV Temperature Hysteresis ∆VOUT/ cycle (Note 3) 100 ppm Long-Term Stability ∆VOUT/ time 1000hr at TA = +25°C 90 ppm/ 1000hr f = 0.1Hz to 10Hz 73 µVP-P f = 10Hz to 10kHz 88 µVRMS VIN = 5V ±100mV, f = 120Hz 76 dB To VOUT = 0.1% of final value, COUT = 50pF 200 µs DYNAMIC Noise Voltage eOUT ∆VOUT/ ∆VIN Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range tR COUT (Note 4) 0 1 µF VOUT + 0.2 5.5 V 95 125 µA 3.8 16 µA/V INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current Per Change in Input Voltage ∆IIN/∆VIN Guaranteed by line-regulation test (VOUT + 200mV) ≤ VIN ≤ 5.5V _______________________________________________________________________________________ 5 MAX6034 ELECTRICAL CHARACTERISTICS–MAX6034_33 (VOUT = 3.300V) MAX6034 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference ELECTRICAL CHARACTERISTICS–MAX6034_41 (VOUT = 4.096V) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6034A_41 (±0.2%) 4.088 4.096 4.104 MAX6034B_41 (±0.4%) 4.080 MAX6034A_41 4.096 7 4.112 30 MAX6034B_41 7 75 (VOUT + 200mV) ≤ VIN ≤ 5.5V 50 350 Sourcing: 0 ≤ IOUT ≤ 1mA 0.35 1.5 Sinking: 0 ≤ IOUT ≤ 200µA 3.4 9.8 Short to GND 13 Short to IN 7 IOUT = 1mA (Note 5) 70 UNITS OUTPUT Output Voltage VOUT Output Voltage Temperature Coefficient (Note 2) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT OUT Short-Circuit Current Dropout Voltage ISC VIN - VOUT TA = +25°C V ppm/°C µV/V mV/mA mA 200 mV Temperature Hysteresis ∆VOUT/ cycle (Note 3) 100 ppm Long-Term Stability ∆VOUT/ time 1000hr at TA = +25°C 90 ppm/ 1000hr DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT ∆VOUT/ ∆VIN tR COUT f = 0.1Hz to 10Hz 90 µVP-P f = 10Hz to 10kHz 105 µVRMS VIN = 5V ±100mV, f = 120Hz 73 dB To VOUT = 0.1% of final value, COUT = 50pF 260 µs (Note 4) 0 1 µF VOUT + 0.2 5.5 V 95 125 µA 4.7 16 µA/V INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current Per Change in Input Voltage Note 1: Note 2: Note 3: Note 4: Note 5: 6 ∆IIN/∆VIN Guaranteed by line-regulation test (VOUT + 200mV) ≤ VIN ≤ 5.5V All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX as specified. Temperature coefficient is measured by the “box” method, i.e. the maximum ∆VOUT / VOUT is divided by the maximum ∆T. Temperature hysteresis is defined as the change in +25°C output voltage after cycling the device from TMIN to TMAX. Not production tested. Guaranteed by design. Dropout voltage is defined as the minimum differential voltage (VIN - VOUT) at which VOUT decreases by 0.2% from its original value at VIN = 5.0V (VIN = 2.7V for MAX6034_25). _______________________________________________________________________________________ Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference THREE TYPICAL PARTS 2.049 2.047 OUTPUT VOLTAGE (V) 4.102 OUTPUT VOLTAGE (V) 2.051 2.050 MAX6034 toc02 THREE TYPICAL PARTS OUTPUT VOLTAGE (V) 4.106 MAX6034 toc01 2.053 MAX6034_21 LONG-TERM DRIFT (VOUT = 2.048V) MAX6034_41 OUTPUT VOLTAGE TEMPERATURE DRIFT (VOUT = 4.096V) 4.098 4.094 MAX6034 toc03 MAX6034_21 OUTPUT VOLTAGE TEMPERATURE DRIFT (VOUT = 2.048V) 2.049 2.048 2.047 4.090 2.043 10 35 60 85 -40 -15 10 35 60 TEMPERATURE (°C) MAX6034_41 LONG-TERM DRIFT (VOUT = 4.096V) SUPPLY CURRENT vs. SUPPLY VOLTAGE 600 800 1000 110 100 105 SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 400 SUPPLY CURRENT vs. TEMPERATURE 105 MAX6034 toc04 4.096 200 TIME (hr) TEMPERATURE (°C) 4.097 0 85 MAX6034 toc05 -15 4.098 OUTPUT VOLTAGE (V) 2.046 4.086 -40 95 MAX6034 toc06 2.045 VIN = 5.5V 100 95 VIN = 2.7V 90 90 4.095 85 0 200 400 600 800 2.5 1000 3.0 3.5 4.0 4.5 5.0 -40 5.5 -15 10 35 60 85 TIME (hr) SUPPLY VOLTAGE (V) TEMPERATURE (°C) MAX6034_25 DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 2.500V) MAX6034_25 DROPOUT VOLTAGE vs. SINK CURRENT (VOUT = 2.500V) MAX6034_41 DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 4.096V) 0.4 TA = +25°C 0.3 0.2 TA = +85°C TA = +25°C 0.05 0 0 0 1 2 3 SOURCE CURRENT (mA) 4 5 TA = +85°C 0.5 0.4 TA = +25°C 0.3 0.2 TA = -40°C 0.1 TA = -40°C MAX6034 toc09 MAX6034 toc08 0.10 TA = -40°C 0.1 0.6 DROPOUT VOLTAGE (V) DROPOUT VOLTAGE (V) TA = +85°C 0.5 0.15 MAX6034 toc07 0.6 DROPOUT VOLTAGE (V) 80 85 4.094 0 0 0.2 0.4 0.6 SINK CURRENT (mA) 0.8 1.0 0 1 2 3 4 5 SOURCE CURRENT (mA) _______________________________________________________________________________________ 7 MAX6034 Typical Operating Characteristics (VIN = 2.7V for MAX6034_21/25, VIN = 5V for MAX6034_30/33/41, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 6) Typical Operating Characteristics (continued) (VIN = 2.7V for MAX6034_21/25, VIN = 5V for MAX6034_30/33/41, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 6) TA = +85°C TA = +25°C 0.05 TA = -40°C TA = +85°C 2 TA = +25°C 1 TA = -40°C 0 TA = -40°C -1 TA = +25°C TA = +85°C SINK -2 3 TA = +85°C 0.2 0.4 0.6 0.8 TA = +25°C 1 TA = -40°C 0 TA = -40°C -1 1.0 TA = +85°C TA = +25°C SINK -2 SOURCE -3 -3 -1 0 1 2 3 5 4 -1 0 1 3 4 LOAD CURRENT (mA) LOAD CURRENT (mA) MAX6034_25 LINE REGULATION (VOUT = 2.500V) MAX6034_25 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.500V) MAX6034_41 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 4.096V) 0 -20 TA = -40°C 0 5 MAX6034 toc15 0 MAX6034 toc13 20 -20 -40 -60 -40 PSRR (dB) PSRR (dB) -20 -60 -40 -60 TA = +25°C TA = +85°C -80 -80 -100 2.5 3.0 3.5 4.0 4.5 5.0 5.5 -100 0.001 -80 0.01 INPUT VOLTAGE (V) MAX6034_25 LINE TRANSIENT (VOUT = 2.500V) 0.1 1 10 100 1000 -100 0.001 0.01 FREQUENCY (kHz) 0.1 MAX6034_41 LINE TRANSIENT (VOUT = 4.096V) MAX6034 toc16 5.5V VIN 5.0V VOUT 100mV/div AC-COUPLED CLOAD = 0 100µs 10 MAX6034 toc17 VOUT 50mV/div AC-COUPLED CLOAD = 0 1 FREQUENCY (kHz) 2.95V VIN 2.70V 8 2 SINK CURRENT (mA) MAX6034 toc14 0 2 SOURCE 0 MAX6034 toc12 MAX6034 toc11 MAX6034 toc10 0.10 MAX6034_41 LOAD REGULATION (VOUT = 4.096V) 3 OUTPUT VOLTAGE CHANGE (mV) DROPOUT VOLTAGE (V) 0.15 MAX6034_21 LOAD REGULATION (VOUT = 2.048V) OUTPUT VOLTAGE CHANGE (mV) MAX6034_41 DROPOUT VOLTAGE vs. SINK CURRENT (VOUT = 4.096V) OUTPUT VOLTAGE CHANGE (µV) MAX6034 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference 100µs _______________________________________________________________________________________ 100 1000 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference MAX6034_25 LOAD TRANSIENT MAX6034_25 LOAD TRANSIENT MAX6034 toc19 MAX6034 toc18 +10µA IOUT -10µA +10µA IOUT -10µA VOUT 10mV/div AC-COUPLED CLOAD = 0 ILOAD = ±10µA VOUT = 2.5V VOUT 2mV/div AC-COUPLED CLOAD = 1µF ILOAD = ±10µA VOUT = 2.5V 1ms 1ms MAX6034_41 LOAD TRANSIENT MAX6034_41 LOAD TRANSIENT MAX6034 toc21 MAX6034 toc20 +10µA IOUT -10µA +10µA IOUT -10µA VOUT 10mV/div AC-COUPLED VOUT 2mV/div AC-COUPLED CLOAD = 1µF ILOAD = ±10µA VOUT = 4.096V CLOAD = 0 ILOAD = ±10µA VOUT = 4.096V 1ms 1ms MAX6034_25 LOAD TRANSIENT MAX6034_25 LOAD TRANSIENT MAX6034 toc23 MAX6034 toc22 CLOAD = 0 ILOAD = +1mA/-0.2mA VOUT = 2.5V 1ms +1mA IOUT +1mA IOUT -0.2mA -0.2mA VOUT 100mV/div AC-COUPLED VOUT 20mV/div AC-COUPLED CLOAD = 1µF ILOAD = +1mA/-0.2mA VOUT = 2.5V 1ms _______________________________________________________________________________________ 9 MAX6034 Typical Operating Characteristics (continued) (VIN = 2.7V for MAX6034_21/25, VIN = 5V for MAX6034_30/33/41, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 6) MAX6034 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference Typical Operating Characteristics (continued) (VIN = 2.7V for MAX6034_21/25, VIN = 5V for MAX6034_30/33/41, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 6) MAX6034_41 LOAD TRANSIENT MAX6034_25 TURN-ON TRANSIENT MAX6034_41 LOAD TRANSIENT MAX6034 toc24 MAX6034 toc26 MAX6034 toc25 +1mA IOUT +1mA IOUT 2.7V -0.2mA -0.2mA VIN 0 VOUT 100mV/div AC-COUPLED CLOAD = 0 ILOAD = +1mA/-0.2mA VOUT = 4.096V 2.5V VOUT 50mV/div AC-COUPLED VOUT CLOAD = 1µF ILOAD = +1mA/-0.2mA VOUT = 4.096V 1ms 40µs MAX6034_25 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6034_41 OUTPUT NOISE (0.1Hz TO 10Hz) 1ms MAX6034_41 TURN-ON TRANSIENT MAX6034 toc27 CLOAD = 50pF VOUT = 2.5V MAX6034 toc28 0 MAX6034 toc29 VOUT = 2.5V VOUT = 4.096V 5V VIN 0 50µV/div 50µV/div 4.096V VOUT CLOAD = 50pF VOUT = 4.096V 40µs 0 1s 1s Note 6: Many of the MAX6034 family Typical Operating Characteristics are extremely similar. The extremes of these characteristics are found in the MAX6034_21 (2.048V output) and the MAX6034_41 (4.096V output). The Typical Operating Characteristics of the remainder of the MAX6034 family typically lie between those two extremes and can be estimated based on their output voltages. 10 ______________________________________________________________________________________ Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference PIN NAME 1 IN FUNCTION 2 OUT Reference Voltage Output 3 GND Ground Supply Voltage Input Detailed Description The MAX6034 family of precision bandgap references use a proprietary temperature coefficient curvature-correction circuit and laser-trimmed, thin-film resistors, resulting in a low temperature coefficient of less than 30ppm/°C and initial accuracy of better than 0.2%. These devices can source up to 1mA and sink up to 200µA with less than 200mV of dropout voltage, making them attractive for use in low-voltage applications. Applications Information Input Bypassing For the best line-transient performance, decouple the input with a 0.1µF ceramic capacitor as shown in the Typical Operating Circuit. Locate the capacitor as close to IN as possible. Output/Load Capacitance Devices in the MAX6034 family do not require an output capacitor for frequency stability. They are stable for capacitive loads from 0 to 1µF. However, in applications where the load or the supply can experience step changes, an output capacitor reduces the amount of overshoot (or undershoot) and improves the circuit’s transient response. Many applications do not need an external capacitor, and the MAX6034 can offer a significant advantage in these applications when board space is critical. Output Voltage Hysteresis Output voltage 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 temperature hysteresis value for the MAX6034 family is 100ppm. Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 85µs to 260µs depending on the device. The turn-on time can increase up to 1.25ms with the device operating at the minimum dropout voltage and the maximum load. Temperature Coefficient vs. Operating Temperature Range for a 1LSB 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 1LSB, 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 voltage reference changes. Supply Current The quiescent supply current of the series-mode MAX6034 family is typically 90µA and is virtually independent of the supply voltage, with only a 16µA/V (max) variation with supply voltage. When the supply voltage is below the minimum-specified input voltage (as during turn-on), the device can draw up to 50µA beyond the nominal supply current. The input-voltage source must be capable of providing this current to ensure reliable turn-on. ______________________________________________________________________________________ 11 MAX6034 Pin Description MAX6034 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference 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) Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1LSB Maximum Error Chip Information TRANSISTOR COUNT: 113 PROCESS: BiCMOS 12 ______________________________________________________________________________________ 20 BIT 100 Precision, Micropower, Low-Dropout, SC70 Series Voltage Reference SC70, 3L.EPS 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 ____________________ 13 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX6034 Package Information