19-1408; Rev 2; 10/01 Precision, Micropower, Low-Dropout Voltage References Selector Guide PART MAX6190A MAX6190B OUTPUT VOLTAGE (V) INITIAL ACCURACY (mV) TEMPERATURE COEFFICIENT (ppm/°C) 1.250 ±2 <5 1.250 ±4 Features ♦ ±2mV (max) Initial Accuracy ♦ 5ppm/°C (max) Temperature Coefficient ♦ 35µA (max) Supply Current ♦ 100mV Dropout at 500µA Load Current ♦ 0.12µV/µA Load Regulation ♦ 8µV/V Line Regulation Applications Hand-Held Instruments Analog-to-Digital and Digital-to-Analog Converters Industrial Process Control Precision 3V/5V Systems Hard-Disk Drives Ordering Information PART TEMP RANGE PIN-PACKAGE MAX6190AESA -40°C to +85°C 8 SO <10 MAX6190BESA -40°C to +85°C 8 SO -40°C to +85°C 8 SO MAX6190C 1.250 ±6 <25 MAX6190CESA MAX6191A 2.048 ±2 <5 MAX6191AESA -40°C to +85°C 8 SO <10 MAX6191BESA -40°C to +85°C 8 SO <25 MAX6191CESA -40°C to +85°C 8 SO -40°C to +85°C 8 SO MAX6191B MAX6191C 2.048 2.048 ±5 ±10 MAX6192A 2.500 ±2 <5 MAX6192AESA MAX6192B 2.500 ±5 <10 MAX6192BESA -40°C to +85°C 8 SO MAX6192CESA -40°C to +85°C 8 SO MAX6192C 2.500 ±10 <25 MAX6193A 3.000 ±2 <5 MAX6193B 3.000 ±5 <10 MAX6193C 3.000 ±10 <25 MAX6198A 4.096 ±2 <5 MAX6198B 4.096 ±5 <10 MAX6198C 4.096 ±10 <25 MAX6194A 4.500 ±2 <5 MAX6194B 4.500 ±5 <10 N.C. 1 MAX6194C 4.500 ±10 <25 IN 2 MAX6195A 5.000 ±2 <5 MAX6195B 5.000 ±5 <10 N.C. 3 MAX6195C 5.000 ±10 <25 Ordering Information continued at end of data sheet. Pin Configuration TOP VIEW MAX6190– MAX6195 MAX6198 GND 4 8 N.C. 7 N.C. 6 OUT 5 N.C. Typical Operating Circuit appears at end of data sheet. SO ________________________________________________________________ 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 MAX6190–MAX6195/MAX6198 General Description The MAX6190–MAX6195/MAX6198 precision, micropower, low-dropout voltage references offer high initial accuracy and very low temperature coefficient through a proprietary curvature-correction circuit and lasertrimmed precision thin-film resistors. These series-mode bandgap references draw a maximum of only 35µA quiescent supply current, making them ideal for battery-powered instruments. They offer a supply current that is virtually immune to input voltage variations. Load-regulation specifications are guaranteed for source and sink currents up to 500µA. These devices are internally compensated, making them ideal for applications that require fast settling, and are stable with capacitive loads up to 2.2nF. MAX6190–MAX6195/MAX6198 Precision, Micropower, Low-Dropout Voltage References ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND IN ......................................................................-0.3V to +13.5V OUT ..........................................................-0.3V to (VIN + 0.3V) Output Short Circuit to GND or IN (VIN < 6V) ............Continuous Output Short Circuit to GND or IN (VIN ≥ 6V) .........................60s Continuous Power Dissipation (TA = +70°C) 8-Pin SO (derate 5.88mW/°C above +70°C)................471mW Operating Temperature Range ...........................-40°C to +85°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—MAX6190 (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6190A 1.248 1.250 1.252 MAX6190B 1.246 1.250 1.254 MAX6190C 1.244 1.250 1.256 UNITS OUTPUT Output Voltage Output-Voltage Temperature Coefficient (Note 1) VOUT TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Short-Circuit Current ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time TA = +25°C MAX6190A 2 5 MAX6190B 4 10 MAX6190C 8 25 2.5V ≤ VIN ≤ 12.6V 8 80 Sourcing: 0 ≤ IOUT ≤ 500µA 0.12 0.5 Sinking: -500µA ≤ IOUT ≤ 0 Short to GND Short to IN 0.15 4 4 0.6 V ppm/°C µV/V µV/µA mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 25 µVP-P 10Hz to 10kHz 65 µVRMS VIN = 5V ±100mV, f = 120Hz 86 dB To 0.1%, COUT = 50pF 30 DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT VOUT/VIN tR COUT (Note 3) 0 µs 2.2 nF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN 2 Guaranteed by line-regulation test 2.5V ≤ VIN ≤ 12.6V 2.5 12.6 V 27 35 µA 0.8 2 µA/V _______________________________________________________________________________________ Precision, Micropower, Low-Dropout Voltage References (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6191A 2.046 2.048 2.050 MAX6191B 2.043 2.048 2.053 MAX6191C 2.038 2.048 2.058 UNITS OUTPUT Output Voltage VOUT Output-Voltage Temperature Coefficient (Note 1) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Short-Circuit Current ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time TA = +25°C MAX6191A 2 5 MAX6191B 4 10 MAX6191C 8 25 2.5V ≤ VIN ≤ 12.6V 10 100 Sourcing: 0 ≤ IOUT ≤ 500µA 0.12 0.55 Sinking: -500µA ≤ IOUT ≤ 0 Short to GND Short to IN 0.18 4 4 0.70 V ppm/°C µV/V µV/µA mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 40 µVP-P 10Hz to 10kHz 105 µVRMS VIN = 5V ±100mV, f = 120Hz 84 dB To 0.1%, COUT = 50pF 30 µs DYNAMIC Noise Voltage eOUT Ripple Rejection VOUT/VIN Turn-On Settling Time Capacitive-Load Stability Range tR COUT (Note 3) 0 2.2 nF 2.5 12.6 V INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Guaranteed by line-regulation test 2.5V ≤ VIN ≤ 12.6V 27 35 µA 0.8 2 µA/V _______________________________________________________________________________________ 3 MAX6190–MAX6195/MAX6198 ELECTRICAL CHARACTERISTICS—MAX6191 MAX6190–MAX6195/MAX6198 Precision, Micropower, Low-Dropout Voltage References ELECTRICAL CHARACTERISTICS—MAX6192 (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6192A 2.498 2.500 2.502 MAX6192B 2.495 2.500 2.505 MAX6192C 2.490 2.500 2.510 MAX6192A 2 5 MAX6192B 4 10 MAX6192C 8 25 (VOUT + 0.2V) ≤ VIN ≤ 12.6V 15 140 Sourcing: 0 ≤ IOUT ≤ 500µA 0.14 0.60 Sinking: -500µA ≤ IOUT ≤ 0 0.18 0.80 100 200 UNITS OUTPUT Output Voltage VOUT Output-Voltage Temperature Coefficient (Note 1) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 4) Short-Circuit Current TA = +25°C VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time Short to GND Short to IN V ppm/°C µV/V µV/µA mV 4 4 mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 60 µVP-P 10Hz to 10kHz 125 µVRMS VIN = 5V ±100mV, f = 120Hz 82 dB To 0.1%, COUT = 50pF 85 µs DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT VOUT/VIN tR COUT (Note 3) 0 2.2 nF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN 4 Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V VOUT + 0.2 12.6 V 27 35 µA 0.8 2 µA/V _______________________________________________________________________________________ Precision, Micropower, Low-Dropout Voltage References (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6193A 2.998 3.000 3.002 MAX6193B 2.995 3.000 3.005 MAX6193C 2.990 3.000 3.010 MAX6193A 2 5 MAX6193B 4 10 UNITS OUTPUT Output Voltage VOUT TA = +25°C Output-Voltage Temperature Coefficient (Note 1) TCVOUT MAX6193C 8 25 Line Regulation ∆VOUT/ ∆VIN 2.5V ≤ VIN ≤ 12.6V 20 150 Load Regulation ∆VOUT/ ∆VIN 2.5V ≤ VIN ≤ 12.6V 0.14 0.60 0.18 0.80 100 200 Dropout Voltage (Note 4) Short-Circuit Current VIN - VOUT IOUT = 500µA ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time Short to GND Short to IN V ppm/°C µV/V µV/V mV 4 4 mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 75 µVP-P 10Hz to 10kHz 150 µVRMS VIN = 5V ±100mV, f = 120Hz 80 dB To 0.1%, COUT = 50pF 100 DYNAMIC Noise Voltage eOUT Ripple Rejection VOUT/VIN Turn-On Settling Time Capacitive-Load Stability Range tR COUT (Note 3) 0 µs 2.2 nF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V VOUT + 0.2 12.6 V 27 35 µA 0.8 2 µA/V _______________________________________________________________________________________ 5 MAX6190–MAX6195/MAX6198 ELECTRICAL CHARACTERISTICS—MAX6193 MAX6190–MAX6195/MAX6198 Precision, Micropower, Low-Dropout Voltage References ELECTRICAL CHARACTERISTICS—MAX6194 (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT Output Voltage Output-Voltage Temperature Coefficient (Note 1) VOUT TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 4) Short-Circuit Current TA = +25°C MAX6194A 4.498 4.500 4.502 MAX6194B 4.495 4.500 4.505 MAX6194C 4.490 4.500 4.510 MAX6194A 2 5 MAX6194B 4 10 MAX6194C 8 25 (VOUT + 0.2V) ≤ VIN ≤ 12.6V 25 160 Sourcing: 0 ≤ IOUT ≤ 500µA 0.16 0.80 Sinking: -500µA ≤ IOUT ≤ 0 0.22 1.00 100 200 VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time Short to GND Short to IN V ppm/°C µV/V µV/µA mV 4 4 mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 110 µVP-P 10Hz to 10kHz 215 µVRMS VIN = 5V ±100mV, f = 120Hz 76 dB DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT VOUT/VIN tR COUT To 0.1%, COUT = 50pF (Note 3) 180 0 µs 2.2 nF OUTPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN 6 Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V VOUT + 0.2 12.6 V 27 35 µA 0.8 2 µA/V _______________________________________________________________________________________ Precision, Micropower, Low-Dropout Voltage References (VIN = 5.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6195A 4.998 5.000 5.002 MAX6195B 4.995 5.000 5.005 MAX6195C 4.990 5.000 5.010 MAX6195A 2 5 MAX6195B 4 10 MAX6195C 8 25 (VOUT + 0.2V) ≤ VIN ≤ 12.6V 25 160 Sourcing: 0 ≤ IOUT ≤ 500µA 0.17 0.85 Sinking: -500µA ≤ IOUT ≤ 0 0.24 1.10 100 200 UNITS OUTPUT INPUT Output Voltage VOUT Output-Voltage Temperature Coefficient (Note 1) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 4) Short-Circuit Current TA = +25°C VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time Short to GND Short to IN V ppm/°C µV/V µV/µA mA 4 4 mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 120 µVP-P 10Hz to 10kHz 240 µVRMS VIN = 5.5V ±100mV, f = 120Hz 72 dB To 0.1%, COUT = 50pF 220 µs DYNAMIC Noise Voltage eOUT Ripple Rejection VOUT/VIN Turn-On Settling Time Capacitive-Load Stability Range tR COUT (Note 3) 0 2.2 nF 12.6 V OUTPUT INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V VOUT + 0.2 27 35 µA 0.8 2 µA/V _______________________________________________________________________________________ 7 MAX6190–MAX6195/MAX6198 ELECTRICAL CHARACTERISTICS—MAX6195 MAX6190–MAX6195/MAX6198 Precision, Micropower, Low-Dropout Voltage References ELECTRICAL CHARACTERISTICS—MAX6198 (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage Output-Voltage Temperature Coefficient (Note 1) VOUT TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 4) Short-Circuit Current MAX6198A 4.094 4.096 4.098 MAX6198B 4.091 4.096 4.101 MAX6198C 4.086 4.096 4.106 MAX6198A 2 5 MAX6198B 4 10 MAX6198C 8 25 (VOUT + 0.2V) ≤ VIN ≤ 12.6V 25 160 Sourcing: 0 ≤ IOUT ≤ 500µA 0.15 0.70 Sinking: -500µA ≤ IOUT ≤ 0 0.20 0.90 100 200 TA = +25°C VIN - VOUT ∆VOUT ≤ 0.2%, IOUT = 500µA ISC Temperature Hysteresis (Note 2) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time Short to GND Short to IN V ppm/°C µV/V µV/µA mV 4 4 mA 75 ppm 1000hrs at +25°C 50 ppm/ 1000hrs 0.1Hz to 10Hz 100 µVP-P 10Hz to 10kHz 200 µVRMS VIN = 5V ±100mV, f = 120Hz 77 dB To 0.1%, COUT = 50pF 160 µs DYNAMIC DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range eOUT VOUT/VIN tR COUT (Note 3) 0 2.2 nF INPUT INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Note 1: Note 2: Note 3: Note 4: 8 Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V VOUT + 0.2 12.6 V 27 35 µA 0.8 2 µA/V Temperature Coefficient is measured by the “box” method; i.e., the maximum ∆VOUT is divided by the maximum ∆t. Thermal Hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMIN to TMAX. Not production tested. Guaranteed by design. Dropout voltage is the minimum input voltage at which VOUT changes ≤ 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6195). _______________________________________________________________________________________ Precision, Micropower, Low-Dropout Voltage References MAX6195 OUTPUT VOLTAGE TEMPERATURE DRIFT 1.2500 5.0020 5.0015 5.0010 THREE TYPICAL PARTS 1.2494 -40 -20 0 20 40 60 80 100 200 TA = -40°C 100 0 TA = +25°C 4.996 5.0000 4.994 4.9995 -40 4.993 -20 0 20 40 60 80 100 0 100 200 300 400 500 600 700 800 900 1000 TEMPERATURE DRIFT (°C) TIME (HOURS) MAX6195 LINE REGULATION MAX6192/MAX6193 DROPOUT VOLTAGE vs. SOURCE CURRENT 800 OUTPUT VOLTAGE CHANGE (µV) MAX6190 toc04 OUTPUT VOLTAGE CHANGE (µV) TA = +85°C 4.997 4.995 MAX6190 LINE REGULATION 300 4.998 5.0005 TEMPERATURE DRIFT (°C) 400 4.999 TA = +85°C 600 TA = -40°C 400 200 0.8 0.7 DROPOUT VOLTAGE (V) 1.2496 5.000 MAX6190 toc05 1.2498 5.001 TA = +25°C MAX6190 toc06 1.2502 VOUT (V) VOUT (V) 5.0025 THREE TYPICAL PARTS 5.002 OUTPUT VOLTAGE (V) 5.0030 1.2504 5.003 0.6 0.5 TA = -40°C 0.4 TA = +85°C 0.3 0.2 0 0.1 -100 -200 6 8 10 12 5 7 9 11 13 0 200 400 600 800 INPUT VOLTAGE (V) SOURCE CURRENT (µA) MAX6190 LOAD REGULATION MAX6195 LOAD REGULATION MAX6194/MAX6195/MAX6198 DROPOUT VOLTAGE vs. SOURCE CURRENT 0.2 TA = -40°C 0 TA = +85°C TA = +25°C -0.2 0.4 0.2 TA = -40°C 0 -0.2 0.30 TA = +25°C TA = -40°C 0.25 DROPOUT VOLTAGE (V) MAX6190 toc07 0.4 OUTPUT VOLTAGE CHANGE (mV) 14 INPUT VOLTAGE (V) MAX6012 toc08 4 OUTPUT VOLTAGE CHANGE (mV) 2 TA = +25°C 0 1000 MAX6190 toc09 1.2506 THREE TYPICAL PARTS 5.0035 MAX6190 toc02 5.0040 MAX6190 toc01 1.2508 MAX6195 LONG-TERM DRIFT MAX6190 toc03 MAX6190 OUTPUT VOLTAGE TEMPERATURE DRIFT TA = +85°C 0.20 0.15 0.10 TA = +25°C 0.05 TA = +85°C -0.4 -500 -375 -250 -125 0 125 250 375 500 LOAD CURRENT (µA) -0.4 -500 -375 -250 -125 0 0 125 250 375 500 LOAD CURRENT (µA) 0 200 400 600 800 1000 SOURCE CURRENT (µA) _______________________________________________________________________________________ 9 MAX6190–MAX6195/MAX6198 Typical Operating Characteristics (VIN = 5V for MAX6190/1/2/3/4/8, VIN = 5.5V for MAX6195; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 5) Typical Operating Characteristics (continued) (VIN = 5V for MAX6190/1/2/3/4/8, VIN = 5.5V for MAX6195; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 5) 1 1 0.1 0.1 0.01 0.01 40 VALID OVER SPECIFIED VIN (MIN) TO VIN (MAX) FOR EACH PART 38 36 SUPPLY CURRENT (µA) VCC = 5.5V ±0.25V 10 PSR (mV/V) PSR (mV/V) 10 SUPPLY CURRENT vs. INPUT VOLTAGE MAX16190 toc11 100 MAX6190 toc10 100 MAX6195 POWER-SUPPLY REJECTION vs. FREQUENCY MAX6190 toc12 MAX6190 POWER-SUPPLY REJECTION vs. FREQUENCY 34 32 30 28 26 24 22 1k 10k 100k 1M 20 10 10M 100 1k 10k 100k 1M 2 10M 4 6 8 10 FREQUENCY (Hz) FREQUENCY (Hz) INPUT VOLTAGE (V) MAX6190 OUTPUT IMPEDANCE vs. FREQUENCY MAX6195 OUTPUT IMPEDANCE vs. FREQUENCY SUPPLY CURRENT vs. TEMPERATURE 10 1 40 100 SUPPLY CURRENT (µA) OUTPUT IMPEDANCE (Ω) 100 10 12 14 MAX6190 toc15 1k MAX6190 toc13 1k MAX6190 toc14 100 OUTPUT IMPEDANCE (Ω) 35 VIN = 12.5V VIN = 7.5V 30 VIN = 5.5V 25 1 VIN = 2.5V (MAX6190/MAX6191 ONLY) 20 0.1 0.1 0.01 0.1 1 10 100 1k 0.01 0.1 10k 100k 1M 1 10 100 1k -40 10k 100k 1M -20 0 20 40 TEMPERATURE (°C) MAX6190 0.1Hz TO 10Hz OUTPUT NOISE MAX6195 0.1Hz TO 10Hz OUTPUT NOISE MAX6190 TURN-ON TRANSIENT MAX6190 toc17 VIN 1V/div VOUT 20µV/div VOUT 1V/div 1s/div 1s/div 80 100 MAX6190 toc18 FREQUENCY (Hz) VOUT 10µV/div 10 60 FREQUENCY (Hz) MAX6190 toc16 MAX6190–MAX6195/MAX6198 Precision, Micropower, Low-Dropout Voltage References 10µs/div ______________________________________________________________________________________ Precision, Micropower, Low-Dropout Voltage References MAX6195 TURN-ON TRANSIENT MAX6195 LOAD-TRANSIENT RESPONSE MAX6190 LOAD-TRANSIENT RESPONSE IOUT 40µA/div IOUT 50µA/div -25µA VOUT 50mV/div VOUT 20mV/div VIN 2V/div VOUT 2V/div 10µs/div 20µs/div 10µs/div IOUT = ±25µA, AC-COUPLED MAX6190 toc21 +25µA MAX6190 toc20 MAX6190 toc19 VIN = 5.5V, IOUT = ±25µA, AC-COUPLED +500µA IOUT -500µA 00µA/div MAX6190 toc24 MAX6190 toc23 MAX6190 toc22 IOUT 1mA/div MAX6190 LINE-TRANSIENT RESPONSE MAX6195 LOAD-TRANSIENT RESPONSE MAX6190 LOAD-TRANSIENT RESPONSE VIN 200mV/div VOUT 00mV/div VOUT 0.2V/div VOUT 100mV/div 20µs/div 10µs/div VIN = 5.5V, IOUT = ±500µA, AC-COUPLED IOUT = ±500µA, AC-COUPLED 2.5µs/div VIN = 5V ±0.25V, AC-COUPLED MAX6190 toc25 MAX6195 LINE-TRANSIENT RESPONSE VIN 200mV/div VOUT 100mV/div 2µs/div VIN = 5.5V ±0.25V, AC-COUPLED Note 5: Many of the Typical Operating Characteristics of the MAX6190 family are extremely similar. The extremes of these characteristics are found in the MAX6190 (1.2V output) and the MAX6195 (5.0V output) devices. The Typical Operating Characteristics of the remainder of the MAX6190 family typically lie between these two extremes and can be estimated based on their output voltage. ______________________________________________________________________________________ 11 MAX6190–MAX6195/MAX6198 Typical Operating Characteristics (continued) (VIN = 5V for MAX6190/1/2/3/4/8, VIN = 5.5V for MAX6195; IOUT = 0; TA = +25°C; unless otherwise noted.) (Note 5) MAX6190–MAX6195/MAX6198 Precision, Micropower, Low-Dropout Voltage References Pin Description PIN NAME FUNCTION 1, 3, 5, 7, 8 N.C. 2 IN 4 GND Ground 6 OUT Reference Voltage Output No Connection. Not internally connected. Supply Voltage Input Detailed Description The MAX6190–MAX6195/MAX6198 precision bandgap references use a proprietary curvature-correction circuit and laser-trimmed thin-film resistors, resulting in a low temperature coefficient of <5ppm/°C and initial accuracy of better than 0.1%. These devices can sink and source up to 500µA with <200mV of dropout voltage, making them attractive for use in low-voltage applications. Applications Information Output/Load Capacitance Devices in this family do not require an output capacitance for frequency stability. They are stable for capacitive loads from 0 to 2.2nF. However, in applications where the load or the supply can experience step changes, an output capacitor will reduce the amount of overshoot (or undershoot) and assist the circuit’s transient response. Many applications do not need an external capacitor, and this family can offer a significant advantage in these applications when board space is critical. Supply Current The quiescent supply current of these series-mode references is a maximum of 35µA and is virtually independent of the supply voltage, with only a 0.8µA/V variation with supply voltage. Unlike series references, shuntmode references operate with a series resistor connected to the power supply. The quiescent current of a shunt-mode reference is thus a function of the input 12 voltage. Additionally, shunt-mode references have to be biased at the maximum expected load current, even if the load current is not present all the time. In the series-mode MAX6190 family, the load current is drawn from the input voltage only when required, so supply current is not wasted and efficiency is maximized at all input voltages. This improved efficiency can help reduce power dissipation and extend battery life. When the supply voltage is below the minimum specified input voltage (as during turn-on), the devices can draw up to 200µA beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on. 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 is 75ppm. Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 30µs to 220µs, depending on the device. The turn-on time can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load. Positive and Negative Low-Power Voltage Reference Figure 1 shows a typical method for developing a bipolar reference. The circuit uses a MAX681 voltage doubler/inverter charge-pump converter to power an ICL7652, thus creating a positive as well as a negative reference voltage. ______________________________________________________________________________________ Precision, Micropower, Low-Dropout Voltage References VCC 2VS V+ IN MAX681 GND +REF OUTPUT OUT V- MAX6190– MAX6195 MAX6198 1MΩ, 0.1% V+ OUTPUT GND ICL7652 V1MΩ, 0.1% 10nF -REF OUTPUT -2VS Figure 1. Positive and Negative References from Single 3V or 5V Supply Ordering Information (continued) TEMP RANGE PIN-PACKAGE MAX6193AESA PART -40°C to +85°C 8 SO MAX6193BESA -40°C to +85°C 8 SO MAX6193CESA -40°C to +85°C 8 SO MAX6194AESA -40°C to +85°C 8 SO MAX6194BESA -40°C to +85°C 8 SO MAX6194CESA -40°C to +85°C 8 SO MAX6195AESA -40°C to +85°C 8 SO MAX6195BESA -40°C to +85°C 8 SO MAX6195CESA -40°C to +85°C 8 SO MAX6198AESA -40°C to +85°C 8 SO MAX6198BESA -40°C to +85°C 8 SO MAX6198CESA -40°C to +85°C 8 SO Typical Operating Circuit +SUPPLY INPUT (SEE SELECTOR GUIDE ON FIRST PAGE) IN OUT * REFERENCE OUT MAX6190– MAX6195 MAX6198 GND 2.2nF MAX* *CAPACITORS ARE OPTIONAL Chip Information TRANSISTOR COUNT: 70 ______________________________________________________________________________________ 13 MAX6190–MAX6195/MAX6198 VS Precision, Micropower, Low-Dropout Voltage References SOICN.EPS MAX6190–MAX6195/MAX6198 Package Information 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.