AME385

Analog Microelectronics, Inc. AME385-1.2 Micropower Voltage Reference Diode n General Description The AME385-1.2 is a micropower 2-terminal band-gap voltage regulator diode. It operates over a 15µA to 20mA current range. Each circuit is trimmed at wafer sort to provide a ±0.2% and ±0.5% initial tolerance. The design of the AME385-1.2 allows for a large range of load capacitances and operating currents. The low start-up current makes these part ideal for battery applications. Analog Microelectronics offers this part in a TO-92 and SO-8 packages as well as the space saving SOT-23. n Key Features l Small packages: SOT-23, TO-92, SO-8 l Tolerates capacitive loads l Fixed reverse breakdown voltage of 1.235V l Tight voltage tolerance ---------- ±0.20%, ±0.5% l Wide operating current ---------- 15µA to 20mA l Wide temperature range -------- -40oC to +85oC l Low temperature coefficient --- 100ppm/oC (max) l Excellent transient response n Applications l l l l l l Portable electronics Power supplies Computer peripherals Data acquisition systems Battery chargers Consumer electronics n Functional Block Diagram VR n Typical Application VS RS B andgap Cell Feedbac k Current S hunt VR V R = 1.235V GND 1 000pF V alue optional I RS = VS - VR I 1 Analog Microelectronics, Inc. AME385-1.2 Micropower Voltage Reference Diode n Package Outline SOT-23 Top View NC * TO-92-3 Bottom View TO-92-2 Bottom View NC * + - + - + - SO-8 Top View NC NC NC 1 2 3 4 8 7 6 5 + NC NC NC * The NC pin must float or be connected to - (negative) n Ordering Information Part N umber A ME385CE ET Accuracy 0.2% Marking A CQww A ME 385CEHA yyww A ME 385 A EA S yyww A ME 385 A EA T yyww A BXww A ME 385A EHA yyww Package Operating Temp. R ange S OT-23 -40 O C to +85 O C A ME385CE HA 0.2% S O-8 -40 O C to +85 O C A M E385A E AS 0.5% TO-92-2 -40 O C to +85 O C A M E385A E AT 0.5% TO-92-3 -40 O C to +85 O C A M E385A E ET 0.5% S OT-23 -40 O C to +85 O C A M E385A E HA 0.5% S O-8 -40 O C to +85 O C Please consult AME sales office or authorized Rep./Distributor for other voltage accuracy and package type availability. 2 Analog Microelectronics, Inc. AME385-1.2 Micropower Voltage Reference Diode n Absolute Maximum Ratings Parame te r Supply Current Maximum 50 Unit mA n Recommended Operating Conditions Parameter Supply Current Ambient Temperature Range Junction Temperature Rating 100µA ~ 20mA -40 to +85 -40 to +125 o Unit C C o n Thermal Information P a ra m e te r S O T-2 3 Th e rm a l R e s is t a n c e TO -9 2 S O -8 M ax im u m Jun c t io n Te m p era t u re M ax im u m L e a d Te m p e ra tu re ( 1 0 S e c ) M a x im u m 325 180 125 150 300 o o Un it C/W C C o Caution: Stress above the listed absolute rating may cause permanent damage to the device 3 Analog Microelectronics, Inc. AME385-1.2 Micropower Voltage Reference Diode n Electrical Specifications Unless otherwise specified, TA = 0 ~70 o C, I R = 100 µA PARAMETER Reference Voltage, ±0.2% VREF Reference Voltage, ±0.5% Minimum Current Reference Voltage Change With Current Maximum Operation Current Reverse Dynamic Impedence Wideband Noise (rms) Long term Stability Reference Voltage Temp. Coeff. VREFTC IMIN IMIN < I < 1mA dVREF/I 1mA < I < 20mA ILmax RDI Vn IR= 100µA, f=20Hz IR= 100µA, 10 Hz