AMS385AN

Advanced Monolithic Systems FEATURES AMS285/AMS385 ADJUSTABLE MICROPOWER VOLTAGE REFERENCE DIODE RoHS compliant APPLICATIONS • Battery Powered Systems • Instrumentation • A/D, D/A Converters • Temperature measurement • Current sources • Notebook/Personal Computer • Monitors/ VCR/ TV • Pagers • Adjustable from 1.24V to 5.30V • Operating Current 10µA to 20mA • 1% and 2% Initial Tolerance • 1Ω Dynamic Impedance • Low Temperature Coefficient • 1.2V Device and 2.5V Device also available AMS285-1.2 and AMS285-2.5 series, respectively AMS385-1.2 and AMS385-2.5 series. GENERAL DESCRIPTION The AMS285/AMS385 are three-terminal micropower band-gap voltage reference diodes. They feature a very low dynamic impedance and good temperature coefficient, operating from 1.24V to 5.3V and over a 10µA to 20mA current range. On-chip trimming is used to provide tight voltage tolerance. Since the AMS285/AMS385 is a band-gap reference, uses only transistors and resistors, low noise and good long-term stability result. Careful design of the AMS285/AMS385 has made the device exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain of the AMS285/AMS385 makes these reference diodes useful for micropower circuitry. These voltage references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further more, the wide operating current allows it to replace older references with a tight tolerance part. The AMS285 is operational in the full industrial temperature range of -40°C to 85°C while AMS385 is operating over a 0°C to 70°C temperature range. The AMS285/AMS385 are available in TO-92, SO-8 and SOT-89 packages. ORDERING INFORMATION: TOL. ±12mV ±25mV ±25mV ±12mV ±25mV ±25mV TO-92 AMS285AN AMS285BN AMS285CN AMS385AN AMS385BN AMS385CN PACKAGE TYPE 8 LEAD SOIC AMS285AS AMS285BS AMS285CS AMS385AS AMS385BS AMS385CS SOT-89 AMS285AL AMS285BL AMS285CL AMS385AL AMS385BL AMS385CL OPERATING TEMPERATURE RANGE -40 to 85° C -40 to 85° C -40 to 85° C 0 to 70° C 0 to 70° C 0 to 70° C Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 ABSOLUTE MAXIMUM RATINGS Reverse Current Forward Current Operating Temperature Range AMS285 AMS385 30mA 10mA -40°C to 85°C 0°C to 70°C Storage temperature Soldering information ( 25 Sec) -55°C to +150°C 265°C ELECTRICAL CHARACTERISTICS Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified. Parameter Reference Voltage Dynamic Output Impedance Conditions IR =100 µA IAC =0.1IR, f = 20Hz VOUT = VREF VOUT = 5.3V 10µA ≤IR ≤1mA 1mA ≤IR ≤20mA VOUT = VREF VOUT = 5.3V 10Hz ≤ f ≤ 10kHz VOUT = VREF VOUT = 5.3V Min 1.228 AMS285A Typ Max 1.240 0.3 0.7 0.2 4 6 30 1.0 10 9 45 1.252 Min 1.215 AMS285B Typ Max 1.240 0.3 0.7 0.2 4 6 30 1.0 10 9 45 1.265 Min 1.215 AMS285C Typ Max 1.240 0.3 0.7 0.2 4 6 30 1.0 10 9 45 1.265 Units V Ω Reference Voltage Change with Current Min. Operating Current (Note 4) Wide Band Noise (Note 5) mV mV µA µA 50 170 25 50 170 50 50 170 100 150 µVrms µVrms ppm/°C Temperature Coeff. (Note 6) Long Term Stability (Note 5) TA=25°C±.1°C T = 1000 Hr 20 20 20 ppm ELECTRICAL CHARACTERISTICS Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified. Parameter Reference Voltage Dynamic Output Impedance Conditions IR =100 µA IAC =0.1IR, f = 20Hz VOUT = VREF VOUT = 5.3V 10µA ≤IR ≤1mA 1mA ≤IR ≤20mA VOUT = VREF VOUT = 5.3V 10Hz ≤ f ≤ 10kHz VOUT = VREF VOUT = 5.3V Min 1.228 AMS285A Typ Max 1.240 0.3 0.7 0.2 4 6 30 1.0 10 9 45 1.252 Min 1.215 AMS285B Typ Max 1.240 0.3 0.7 0.2 4 6 30 1.0 10 9 45 1.265 Min 1.215 AMS285C Typ Max 1.240 0.3 0.7 0.2 4 6 30 1.0 10 9 45 1.265 Units V Ω Reference Voltage Change with Current Min. Operating Current (Note 4) Wide Band Noise (Note 5) mV mV µA µA 50 170 25 50 170 50 50 170 100 150 µVrms µVrms ppm/°C Temperature Coeff. (Note 6) Long Term Stability (Note 5) TA=25°C±.1°C T = 1000 Hr 20 20 20 ppm Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Note 2: For elevated temperature operation, Tj max is: AMS285 AMS385 +125°C +100°C Thermal Resistance ϕ JA (junction to ambient) TO-92 170°C/W (0.125” leads) SO-8 165°C/W SOT-89 160°C/W Note 3: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at TA = TJ = 25°C. Note 4: Guaranteed and 100% production tested. Note 5: Guaranteed but not 100% production tested. These limits are not used to calculate average outgoing quality levels. Note 6: The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures between the operating TMAX and TMIN, divided by TMAX - TMIN. The measured temperatures are 0°C, 25°C, 70°C and 85°C. PIN CONNECTIONS TO-92 Plastic Package (N) 8L SOIC SO Package (S) + 8 N/C N/C ADJ 7 6 5 SOT-89 (L) FB 3 + 2 1 3 1 2 3 N/C N/C N/C 4 - 2 + 1 - FB Bottom View Top View Top View TYPICAL APPLICATIONS 1.2V Reference 9V R1 500k 1.2V + AMS385 FB 5.0V Reference 9V R1 50k Precision 10V Reference 15V R1 5k VOUT 10V + AMS385 FB R3 68.1k 1% R2 301k 1% ⎛ R3 ⎞ VOUT = 1.24 ⎜ ⎜ R2 + 1⎟ ⎟ ⎝ ⎠ 5V + AMS385 FB R2 120k R3 364k - Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 TYPICAL APPLICATIONS (Continued) Low AC Noise Reference 15V R1 100k VOUT 10V + AMS385 C1 0.47µF FB + C2 10µF R2 120k Current Source +15V + AMS385 FB R1 2N2905 2N3964 R2 120k R3 360kΩ R4 33 1 µA< I < 100 mA 1.24V IOUT = R1 25V Low Current Shunt Regulator V+ R3 200mA Shunt Regulator V+ 100 µA< I < 5 mA VOUT 25V R1 + 120k FB R2 2.4M R4 50 µA< I < 200 mA VOUT 2.5V + AMS385 2N2219 R3 1k FB R1 120k AMS385 2N5115 R2 120k Voltage Level Detector Voltage Level Detector + AMS385 D1 FB R1 120k D1 R2 1M + AMS385 FB R1 120k λ λ R3 200 -5V R2 1M R3 330 < -12V LED ON -5V > -12V LED ON Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 TYPICAL APPLICATIONS (Continued) Bidirectional Clamp ± 2.4V VIN I R1 VOUT D2 1N457 I Bidirectional Adjustable Clamp ± 1.8V to ± 2.4V VIN R1 VOUT D2 1N457 Bidirectional Adjustable Clamp ± 2.4V to ± 6V VIN I R1 VOUT + AMS385 R2 330k FB R3 1M FB R4 330k D2 1N457 AMS385 + + AMS385 D1 1N457 FB R2 510k FB R3 510k - R2 510k FB + AMS385 D1 1N457 R3 510k FB R4 390k - AMS385 + AMS385 + D1 1N457 TYPICAL PERFORMANCE CHARACTERISTICS REFERENCE VOLTAGE CHANGE (mV) 0 ∆Y ∆T -5 REFERENCE VOLTAGE CHANGE (mV) AMS285 Typical Temperature Coefficient AMS385 Typical Temperature Coefficient 0 ∆Y ∆T -5 TEMPCO = ∆Y ∆T -10 -50 -40 -25 0 25 50 75 80 100 125 TEMPERATURE (° C) -10 0 25 70 TEMPERATURE (° C) Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Reverse Characteristics OUTPUT VOLTAGE CHANGE (mV) 10 8 6 4 2 0 -2 0.01 0.1 1 10 REVERSE CURRENT (mA) 100 TA =25° C TA =-55° C Reverse Characteristics 100 REVERSE CURRENT ( µ A) FORWARD VOLTAGE (V) 1.2 Forward Characteristics TA =125° C TA =-55° C 10 TA =125° C 0.8 1 TA =-55° C 0.4 TA =25° C TA =125° C 0.1 0 TA =25° C 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 REVERSE VOLTAGE (V) Feedback Current 0.01 0.1 1 10 Temperature Drift of 3 Representative Units 1.260 FEEDBACK CURRENT (nA) REFERENCE VOLTAGE (V) IR= 100µA Minimum Operating Current 80 25 IR= 100µA 1.250 20 15 10 MINIMUM CURRENT ( µ A) 70 60 50 40 30 20 TYP @ 25° C AMS385 WORST CASE 1.240 VOUT = VREF VOUT = 5.3V 1.230 5 0 -50 -25 0 25 50 75 100 125 TEMPERATURE (° C) Output Noise Voltage 1.220 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (° C) Dynamic Output Impedance 100 IR= 100µA ∆IR= 0.1IR TA =25° C 10 0 1 5 2 3 4 OUTPUT VOLTAGE (V) Response Time 6 5 OUTPUT INPUT 50k OUTPUT 120k AMS385 364k 10,000 VOUT = VREF IR= 100µA VOUT = 5.3V OUTPUT IMPEDANCE ( Ω ) NOISE (nV/√Hz) 4 1,000 VOUT = VREF 10 VOUT = 5.3V VOLTAGE (V) 3 2 1 0 10 1 100 INPUT 0.1 10 100 1k 10k FREQUENCY (Hz) 100k 10 10 100 1k 10k FREQUENCY (Hz) 100k 0 0 50 100 150 200 TIME ( µ s) Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3 LEAD TO-92 PLASTIC PACKAGE (N) 0.060±0.005 (1.524±0.127) DIA 0.180±0.005 (4.572±0.127) 0.060±0.010 (1.524±0.254) 0.140±0.010 (3.556±0.127) 0.180±0.005 (4.572±0.127) 0.90 (2.286) NOM 5° NOM 0.500 (12.70) MIN 10° NOM 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSIONS 0.050±0.005 (1.270±0.127) 0.016±0.003 (0.406±0.076) 0.015±0.002 (0.381±0.051) N (TO-92 ) AMS DRW# 042391 8 LEAD SOIC PLASTIC PACKAGE (S) 0.189-0.197* (4.801-5.004) 8 7 6 5 0.228-0.244 (5.791-6.197) 0.150-0.157** (3.810-3.988) 1 2 3 4 0.053-0.069 (1.346-1.752) 0.004-0.010 (0.101-0.254) 0.008-0.010 (0.203-0.254) 0.010-0.020 x 45° (0.254-0.508) 0°-8° TYP 0.014-0.019 (0.355-0.483) 0.050 (1.270) TYP 0.016-0.050 (0.406-1.270) S (SO-8 ) AMS DRW# 042293 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS285/AMS385 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued). SOT-89 PLASTIC PACKAGE (L) 0.173-0.181 (4.40-4.60) 0.064-0.072 (1.62-1.83) 0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44) 0.155-0.167 (3.94-4.25) 0.090-0.102 (2.29-2.60) 0.084-0.090 (2.13-2.29) 0.035-0.047 (0.89-1.20) 0.059 (1.50) BSC 0.118 (3.00) BSC 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56) L (SOT-89 ) AMS DRW# 042392 Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723