LTC6655/LTC6655LN 0.25ppm Noise, Low Drift Precision References FEATURES DESCRIPTION n Low Noise: The LTC 6655 is a complete family of precision bandgap n 0.25ppm (0.1Hz to 10Hz) 625nV for the voltage references, offering exceptional noise and drift P-P P-P LTC6655-2.5 performance. This low noise and drift is ideally suited n 0.21ppm (10Hz to 1kHz) for the LTC6655LN for the high resolution measurements required by instru- RMS C = 100F mentation and test equipment. In addition, the LTC6655 NR n Low Drift: 2ppm/C Max is fully specified over the temperature range of 40C n High Accuracy: 0.025% Max to 125C, ensuring its suitability for demanding auto- n No Humidity Sensitivity (LS8 Package) motive and industrial applications. Advanced curvature n Thermal Hysteresis (LS8): 30ppm (40C to 85C) compensation allows this bandgap reference to achieve a n Long-Term Drift (LS8): 20ppm/kHr drift of less than 2ppm/C with a predictable temperature n 100% Tested at 40C, 25C and 125C characteristic and an output voltage accurate to 0.025%, n Load Regulation: <10ppm/mA reducing or eliminating the need for calibration. n Sinks and Sources Current: 5mA The LTC6655LN Low Noise comes with a noise reduction n Low Dropout: 500mV pin that enables reduction of wideband noise with the n Maximum Supply Voltage: 13.2V addition of a single capacitor. n Low Power Shutdown: <20A Max n The LTC6655 can be powered from as little as 500mV Available Output Voltages: 1.25V, 2.048V, 2.5V, 3V, above the output voltage to as much as 13.2V. Superior 3.3V, 4.096V, 5V n load regulation with source and sink capability, coupled Available in an 8-Lead MSOP and High Stability with exceptional line rejection, ensures consistent per- Hermetic 5mm 5mm LS8 Packages formance over a wide range of operating conditions. A APPLICATIONS shutdown mode is provided for low power applications. n Instrumentation and Test Equipment The LTC6655 references are offered in an 8-lead MSOP n High Resolution Data Acquisition Systems package and an 8-lead LS8 package. The LS8 is a n Weigh Scales 5mm 5mm surface mount hermetic package that pro- n Precision Battery Monitors vides outstanding stability. n Precision Regulators All registered trademarks and trademarks are the property of their respective owners. n Medical Equipment TYPICAL APPLICATION Basic Connection Low Frequency 0.1Hz to 10Hz Noise (LTC6655-2.5) LTC6655-2.5 3V < V 13.2V V V V IN OUT IN OUT F C IN SHDN V OUT S C 0.1F OUT GND 10F 6655 TA01a 500nV/DIV Basic Connection with Noise Reduction LTC6655LN-2.5 3V < V 13.2V V V V IN IN OUT OUT C IN C SHDN NR OUT 0.1F 10F 6655 TA01b C GND NR 1s/DIV 10F 6655 TA01c Rev. J 1 Document Feedback For more information www.analog.comLTC6655/LTC6655LN ABSOLUTE MAXIMUM RATINGS (Note 1) Input Voltage Operating Temperature Range (Note 2).. 40C to 125C V to GND .......................................... 0.3V to 13.2V Storage Temperature Range (Note 2) ..... 65C to 150C IN SHDN to GND ........................... 0.3V to (V + 0.3V) Lead Temperature Range (Soldering, 10 sec) IN Output Voltage: (Note 3) .................................................................300C V ....................................... 0.3V to (V + 0.3V) OUT F IN V ..................................................... 0.3V to 6V OUT S NR ........................................................... 0.3V to 6V Output Short-Circuit Duration ...................... Indefinite PIN CONFIGURATION LTC6655 LTC6655LN TOP VIEW TOP VIEW SHDN 1 8 GND SHDN 1 8 GND V 2 7 V V 2 7 V IN OUT F IN OUT F GND 3 6 V GND 3 6 NR OUT S GND 4 5 GND GND 4 5 GND MS8 PACKAGE MS8 PACKAGE 8-LEAD PLASTIC MSOP 8-LEAD PLASTIC MSOP T = 150C, = 300C/W T = 150C, = 300C/W JMAX JA JMAX JA STAR ALL GND CONNECTIONS AT PIN 4 STAR ALL GND CONNECTIONS AT PIN 4 LTC6655 LTC6655LN TOP VIEW TOP VIEW GND GND 8 8 SHDN 1 7 V OUT F SHDN 1 7 V OUT V 2 6 V IN OUT S V 2 6 NR IN GND 3 5 GND GND 3 5 GND 4 4 GND GND LS8 PACKAGE LS8 PACKAGE 8-PIN LEADLESS CHIP CARRIER (5mm 5mm) 8-PIN LEADLESS CHIP CARRIER (5mm 5mm) T = 150C, = 120C/W JMAX JA T = 150C, = 120C/W JMAX JA STAR ALL GND CONNECTIONS AT PIN 4 STAR ALL GND CONNECTIONS AT PIN 4 Rev. J 2 For more information www.analog.com