LT1027 Precision 5V Reference FEATURES DESCRIPTIO n The LT 1027 is a precision reference with extra-low drift, Very Low Drift: 2ppm/ C Max TC n superior accuracy, excellent line and load regulation and Pin Compatible with LT1021-5, REF-02, low output impedance at high frequency. This device is (PDIP Package) n intended for use in 12- to 16-bit A-to-D and D-to-A Output Sources 15mA, Sinks 10mA n systems where demanding accuracy requirements must Excellent Transient Response Suitable for be met without the use of power hungry, heated substrate A-to-D Reference Inputs n references. The fast settling output recovers quickly from Noise Reduction Pin n load transients such as those presented by A-to-D converter Excellent Long Term Stability n reference inputs. The LT1027 brings together both Less Than 1ppm Noise (0.1Hz to 10Hz) P-P outstanding accuracy and temperature coefficient U APPLICATIO S specifications. n The LT1027 reference is based on LTCs proprietary A-to-D and D-to-A Converters n Digital Voltmeters advanced subsurface Zener bipolar process which n Reference Standard eliminates noise and stability problems associated with n surface breakdown devices. Precision Current Source , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO Supplying V and V to the LTC 1290 12-bit ADC REF CC Output Voltage V 5.006 CC S CH0 CLK CH1 A CLK CH2 D TO m C OUT 5.004 ANALOG CH3 D IN INPUTS CH4 CS CH5 5.002 CH6 8V TO 40V CH7 LTC1290 5.000 COM V IN 4.998 + V REF OUT + 4.996 REF LT1027 2.2m F + 10k 22m F AGND DGND V V TRIM 4.994 GND 50 25 0 25 50 75 100 TEMPERATURE (C) 1027 TA01 1027 TA02 sn1027 1027fcs 1 OUTPUT VOLTAGE (V) U ULT1027 ABSOLUTEXAI U RATI GS (Note 1) Supply Voltage (V ) ............................................... 40V Operating Temperature Range IN Input-Output Voltage Differential ............................ 35V LT1027C ................................................ 0 C to 70 C Output to Ground Voltage ......................................... 7V LT1027M (OBSOLETE) ............... 55 C to 125 C V to Ground Voltage Storage Temperature Range TRIM Positive ................................................................ 5V All Devices ....................................... 65 C to 150 C Negative .......................................................... 0.3V Lead Temperature (Soldering, 10 sec)................. 300 C Output Short-Circuit Duration V > 20V ........................................................ 10 sec IN V 20V ................................................... Indefinite IN PACKAGE/ORDER I FOR ATIO TOP VIEW NC* TOP VIEW TOP VIEW 8 NC* 1 7 NC* NC* 1 8 NC* NR 1 8 V IN 7 NC* GND NC* V 2 2 7 IN V 2 6 V IN OUT 3 6 V V 3 6 NC* NR OUT TRIM 3 5 V NR TRIM 4 5 V V 4 5 NC* GND OUT TRIM 4 GND N8 PACKAGE S8 PACKAGE H PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO 8-LEAD TO-5 METAL CAN T = 100 C, q = 130 C/W T = 100 C, q = 180 C/W JMAX JA JMAX JA T = 150 C, q = 150 C/W, q = 45 C/W JMAX JA JC ORDER PART NUMBER ORDER PART NUMBER ORDER PART NUMBER LT1027ACH-5 LT1027BCN8-5 LT1027CCS8-5 LT1027BCH-5 LT1027CCN8-5 LT1027DCS8-5 LT1027CCH-5 LT1027DCN8-5 LT1027ECS8-5 LT1027DCH-5 LT1027ECN8-5 S8 PART MARKING LT1027ECH-5 1027C5 1027D5 OBSOLETE PACKAGE Consider the N8 or S8 Packages for Alternate Source 1027E5 *Connected internally. Do not connect external circuitry to these pins. Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range otherwise specifications are at T = 25 C. V = 10V, I = 0, unless otherwise specified. A IN LOAD SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Output Voltage (Note 2) LT1027A 4.9990 5.000 5.0010 V OUT LT1027B, C, D 4.9975 5.000 5.0025 LT1027E 4.9950 5.000 5.0050 TCV Output Voltage Temperature Coefficient LT1027A, B l 1 2 ppm/ C OUT (Note 3) LT1027C l 23 LT1027D l 25 LT1027E l 3 7.5 sn1027 1027fcs 2 U WU U W W W