Maxim Integrated Products 1

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1 19-9; Rev ; 7/ +V Precision Voltage Reference General Description The is a precision voltage reference that is pretrimmed to within ±.1% of V. The reference features excellent temperature stability (as low as 1.ppm/ C guaranteed), low current drain, and low noise. It is supplied in the space-saving narrow SO package, as well as, the standard -pin plastic DIP package. Pretrimmed to +V, ±.1% Excellent Temperature Stability: 1ppm/ C Low Noise: µv P-P Low Supply Current: 1.mA (max) Short-Circuit Protected Load Regulation.1%/mA Pin-for-Pin Compatible with REF1 Features A/D Converters D/A Converters Digital Voltmeters Voltage Regulators Threshold Detectors Applications PART Ordering Information TEMP RANGE PIN- INITIAL TEMPCO ERROR PACKAGE (ppm/ C) (mv) CPA C to +7 C PDIP 1 1 CSA C to +7 C Narrow SO 1 1 EPA - C to + C PDIP 1 1 ESA - C to + C Narrow SO 1 1 Ordering Information continued at end of data sheet. Pin Configurations Typical Operating Circuit TOP VIEW 1V OUTPUT 1 7 R P kω SO/DIP Pin Configurations continued at end of data sheet. REFERENCE WITH MED OUTPUT Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1--9-, or visit Maxim s website at

2 ABSOLUTE MAXIMUM RATINGS Input Voltage...V Power Dissipation TO-99 (TV) (derate at 7.1mW/ C above + C)...mW CERDIP (J) (derate at.7mw/ C above +7 C)...mW Plastic DIP (P) (derate at.mw/ C above + C)...mW Narrow SO (S) (derate at.mw/ C above + C)...mW Storage Temperature Range...- C to + C Operating Temperature Range C... C to +7 C E...- C to + C M...- C to +1 C Dice Junction Temperature (T J )...- C to + C Output Short-Circuit Duration (to Ground or )...Indefinite Lead Temperature (soldering, s)...+ 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 ( = +1V, T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Tolerance I L = ma ±1 mv Output Voltage Temperature Coefficient (Note 1) CTV/CPA/CSA 1 TCV O ETV/EJA/EPA/ESA 1 MTV/MJA Output Adjustment Range V Rp = ± ± mv Line Regulation (Note ) = 1V to V..1 %/V Note 1: Temperature coefficient is measured by the box method, i.e., the maximum is divided by T. Note : Line and load regulation specifications include the effect of self-heating. Note : Guaranteed by design for CPA, CSA, EPA, ESA; sample tested for all other grades and packages. ppm/ C Load Regulation (Note ) I L = to ma.1. %/ma Turn-On Settling Time t ON To ±.1% of final value µs Quiescent Supply Current I Q No load 7 µa Noise (Note ) e N(P-P).1Hz to Hz µv P-P Sink Current I S.. ma Short-Circuit Current I SC = V ma

3 Output Adjustment The trim terminal can be used to adjust the output voltage over a V ±mv range. This feature allows system errors to be trimmed by setting the reference to a voltage other than V such as.v for binary applications (see the Typical Operating Circuit). The trim terminal may, of course, be left open if no adjustment is needed. Adjustment of the output does not significantly affect the temperature performance of the device. The temperature coefficient change is approximately.7ppm/ C for mv of output adjustment from its initial value. (T A = + C, unless otherwise noted.) Typical Operating Characteristics LINE REGULATION (db) 7 1 LINE REGULATION vs. FREQUENCY = 1V T A = + C 1k k k 1M FREQUENCY (Hz) toc1 OUTPUT NOISE (µvp-p), OUTPUT WIDEBAND NOISE vs. BANDWIDTH (.1Hz TO FREQUENCY INDICATED) = 1V T A = + C 1k k k 1M FREQUENCY (Hz) toc MAXIMUM LOAD CURRENT (ma) 1 MAXIMUM LOAD CURRENT vs. INPUT VOLTAGE SHORT-CIRCUIT PROTECTION mw MAXIMUM DISSIPATION T A = + C 1 INPUT VOLTAGE (V) toc MAXIMUM LOAD CURRENT (ma) 1 MAXIMUM LOAD CURRENT vs. TEMPERATURE = 1V toc PERCENT CHANGE IN OUTPUT VOLTAGE (%) = 1V T A = T A = + C +7 C OUTPUT CHANGE DUE TO THERMAL SHOCK DEVICE IMMERSED IN +7 C OIL BATH toc TEMPERATURE ( C) - TIME (s)

4 1.1mA + 1V Typical Applications +V kω kω 9V kω.v +1V -V 9V -1V - MAX Figure. Precision Calibration Standard Figure. ±V Reference 1V R.V I OUT = + 1mA R I OUT VOLTAGE COMPLIANCE V TO +1V Figure. Current Source

5 Pin Configurations (continued) TOP VIEW 1 7 Chip Topography GROUND (CASE) TO-99 METAL CAN.7 1.mm mm 7 Ordering Information (continued) CERDIP PART TEMP RANGE PIN- INITIAL TEMPCO ERROR PACKAGE (ppm/ C) (mv) CTV* C to +7 C TO ETV* - C to + C TO EJA* - C to + C CERDIP 1 1 MTV* - C to +1 C TO-99 1 MJA* - C to +1 C CERDIP 1 *Contact factory for availability. Not recommended for new designs. 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. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.