RH1021-7_15 LINER

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The RH1021-7 is a precision 7V reference with ultralow drift and noise, extremely good long-term stability and almost total immunity to input voltage variations. The reference output will source and sink up to 10mA. This reference can also be used as a shunt regulator (2-terminal Zener). Unique circuit design makes the RH1021-7 the first IC reference to offer ultralow drift without the use of high power on-chip heaters. The wafer lots are processed to Linear Technology’s in- house Class S flow to yield circuits usable in stringent military applications. (Note 10) Output to Ground Voltage Output Short-Circuit Duration V ABSOLUTE MAXIMUM RATINGSW WW UDESCRIPTIONU PACKAGE/ORDER INFORMATIONW UU 220V –20V RH1021-7 RH1021BMH-7 RH1021DMH-7 ORDER PART NUMBERTOP VIEW NC* NC* NC* VIN VOUT NC*NC* GND H PACKAGE 8-LEAD TO-5 METAL CAN * Connected internally. Do not connect external circuitry to these pins. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BUR -I CIRCUITUU

10Krad(Si) 20Krad(Si) 50Krad(Si) 100Krad(Si) 200Krad(Si) SYMBOL PARAMETER CONDITIONS NOTES MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX UNITS TCVOUT Output Voltage RH1021BM-7 2 5 6 8 10 12 ppm/ °C Temperature Coefficient RH1021DM-7 2 20 21 23 25 28 ppm/ °C ∆VOUT Line Regulation 8.5V ≤ VIN ≤ 12V 3 4 4 4.5 5 6 ppm/V ∆VIN 12V ≤ VIN ≤ 40V 3 2 2 2 2 3 ppm/V ∆VOUT Load Regulation 0 ≤ IOUT ≤ 10mA 3,8 25 25 25 25 25 ppm/mA ∆IOUT (Sourcing Current) Load Regulation 1.2mA ≤ IOUT ≤ 10mA 3,4 100 100 100 100 150 ppm/mA (Shunt Mode) (Shunt Mode) (Series Mode) TA = 25°C SUB- SUB- SYMBOL PARAMETER CONDITIONS NOTES MIN TYP MAX GROUP MIN TYP MAX GROUP UNITS VOUT Output Voltage 1 6.95 7.05 1 V TCVOUT Output Voltage RH1021BM-7 2 5 2,3 ppm/ °C Temperature Coefficient RH1021DM-7 2 20 2,3 ppm/ °C ∆VOUT Line Regulation 8.5V ≤ VIN ≤ 12V 3 4 1 8 2,3 ppm/V ∆VIN 12V ≤ VIN ≤ 40V 3 2 1 4 2,3 ppm/V ∆VOUT Load Regulation 0 ≤ IOUT ≤ 10mA 3 25 1 40 2,3 ppm/mA ∆IOUT (Sourcing Current) Load Regulation (Shunt Mode) 1.2mA ≤ IOUT ≤ 10mA 3,4 100 1 150 2,3 ppm/mA IS Supply Current (Series Mode) 1.2 1 1.5 2,3 mA IMIN Minimum Current (Shunt Mode) V IN Is Open 1.0 1 0.3 1.2 2,3 mA Output Voltage Noise 0.1Hz ≤ f ≤ 10Hz 5 4 µVP-P 10Hz ≤ f ≤ 1kHz 5 4 4 µVRMS Long-Term Stability ∆T = 1000 Hrs 6 7 ppm of VOUT Noncumulative Temperature Hysteresis ∆T = ± 25°C 3 ppm of VOUT (Preirradiation) (Note 9)TABLE 1: ELECTRICAL CHARACTERISTICS TABLE 1A: ELECTRICAL CHARACTERISTICS (Postirradiation) (Note 7)

TABLE 1A: ELECTRICAL CHARACTERISTICS TABLE 2: ELECTRICAL TEST REQUIRE E TSUW MIL-STD-883 TEST REQUIREMENTS SUBGROUP Final Electrical Test Requirements (Method 5004) 1*,2,3,4 Group A Test Requirements (Method 5005) 1,2,3,4 Group B and D for Class S, and 1,2,3 Group C and D for Class B End Point Electrical Parameters (Method 5005) * PDA Applies to subgroup 1. See PDA Test Notes. PDA Test Notes The PDA is specified as 5% based on failures from group A, subgroup 1, tests after cooldown as the final electrical test in accordance with method 5004 of MIL-STD-883. The verified failures of group A, subgroup 1, after burn-in divided by the total number of devices submitted for burn-in in that lot shall be used to determine the percent for the lot. Linear Technology Corporation reserves the right to test to tighter limits than those given. Note 1: Output voltage is measured immediately after turn-on. Changes due to chip warm-up are typically less than 0.005%. Note 2: Temperature coefficient is measured by dividing the change in output voltage over the temperature range by the change in temperature. Separate tests are done for hot and cold; T MIN to 25°C and 25°C to TMAX. Incremental slope is also measured at 25°C. Note 3: Line and load regulation are measured on a pulse basis. Output changes due to die temperature change must be taken into account separately. Package thermal resistance is 150°C/W for the TO-5 (H) package. Note 4: Shunt mode regulation is measured with the input open. With the input connected, shunt mode current can be reduced to 0mA. Load regulation will remain the same. Note 5: RMS noise is measured with a 2-pole highpass filter at 10Hz and a 2-pole lowpass filter at 1kHz. The resulting output is full wave rectified and then integrated for a fixed period, making the final reading an average as opposed to RMS. Correction factors are used to convert from average to RMS and to correct for the nonideal bandpass of the filters. Peak-to-peak noise is measured with a single highpass filter at 0.1Hz and a 2-pole lowpass filter at 10Hz. The unit is enclosed in a still-air environment to eliminate thermocouple effects on the leads. Test time is 10 seconds. Note 6: Consult factory for units with long term stability data. Note 7: V IN = 12V, IOUT = 0, TA = 25°C, unless otherwise noted. Note 8: IOUT(MAX) (Sourcing) is 5mA for exposures greater than 100Krad (Si). Note 9: VIN = 12V, IOUT = 0, unless otherwise noted. Note 10: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 15V –15V GND VIN 0.1µF Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. TOTAL DOSE BIAS CIRCUIT

© LINEAR TECHNOLOGY CORPORATION 1 990 LT 1007 REV E • PRINTED IN USA I.D. No. 66-10-0178 Rev. E 1007 TYPICAL PERFORMANCE CHARACTERISTICS UW TOTAL DOSE Krad (Si) LOAD REGULATION (ppm/mA) 10 100 1000 RH1021-7 G03 VIN = 12V 0mA ≤ IOUT ≤ 10mA NOTE 8 TOTAL DOSE Krad (Si) OUTPUT VOLTAGE (V) 7.01 6.99 10 100 1000 RH1021-7 G01 VIN = 12V IOUT = 0 Output Voltage TOTAL DOSE Krad (Si) LOAD REGULATION (ppm/mA) 10 100 1000 RH1021-7 G02 VIN = OPEN 1.2mA ≤ IOUT ≤ 10mA Load Regulation (Shunt Mode) Load Regulation (Sourcing) TOTAL DOSE Krad (Si) LINE REGULATION (ppm/V) 1.0 0.5 –0.5 –1.0 –1.5 –2.0 10 100 1000 RH1021-7 G04 12V ≤ VIN ≤ 40V 8.5V ≤ VIN ≤ 12V Line Regulation Temperature Coefficient TOTAL DOSE Krad (Si) TEMPERATURE COEFFICIENT (ppm/°C) –10 –15 10 100 1000 RH1021-7 G05 VIN = 12V TOTAL DOSE Krad (Si) MINIMUM CURRENT (mA) 0.9 0.8 0.7 0.6 0.5 0.4 0.3 10 100 1000 RH1021-7 G06 VIN = OPEN Minimum Current (Shunt Mode) Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com