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| RH1021-7 Precision 7V Reference DESCRIPTION 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 inhouse Class S flow to yield circuits usable in stringent military applications. ABSOLUTE MAXIMUM RATINGS Input Voltage ........................................................... 40V Input/Output Voltage Differential ............................. 35V Output to Ground Voltage (Shunt Mode Current Limit) ............................... 10V Output Short-Circuit Duration VIN = 35V ........................................................ 10 sec VIN 20V ................................................... Indefinite Operating Temperature Range .............. - 55C to 125C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C , LTC and LT are registered trademarks of Linear Technology Corporation. BUR -I CIRCUIT PACKAGE/ORDER INFORMATION TOP VIEW NC* 7 8 1 20V 2 3 4 RH1021-7 5 8 NC* 1 6 7 NC* 6 VOUT 5 NC* 4 GND VIN 2 NC* 3 -20V H PACKAGE 8-LEAD TO-5 METAL CAN * Connected internally. Do not connect external circuitry to these pins. U U W WW U W U UU 1 RH1021-7 TABLE 1: ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VOUT TCVOUT V OUT V IN V OUT I OUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation (Sourcing Current) Load Regulation (Shunt Mode) IS IMIN Supply Current (Series Mode) Minimum Current (Shunt Mode) VIN Is Open Output Voltage Noise Long-Term Stability of VOUT Temperature Hysteresis of VOUT 0.1Hz f 10Hz 10Hz f 1kHz T = 1000 Hrs Noncumulative T = 25C 5 5 6 4 4 7 3 4 RH1021BM-7 RH1021DM-7 8.5V V IN 12V 12V V IN 40V 0 I OUT 10mA 1.2mA I OUT 10mA CONDITIONS NOTES 1 2 2 3 3 3 3,4 4 2 25 100 1.2 1.0 1 1 1 1 1 1 (Preirradiation) (Note 9) TA = 25C TYP MAX 7.05 SUB- - 55C T A 125C GROUP MIN TYP MAX 1 5 20 8 4 40 150 1.5 1.2 2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3 SUBGROUP MIN UNITS V ppm/C ppm/C ppm/V ppm/V ppm/mA ppm/mA mA mA VP-P VRMS ppm ppm 6.95 TABLE 1A: ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VOUT TCVOUT V OUT V IN V OUT I OUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation (Sourcing Current) Load Regulation (Shunt Mode) IMIN IS Minimum Current (Shunt Mode) Supply Current (Series Mode) RH1021BM-7 RH1021DM-7 8.5V V IN 12V 12V V IN 40V 0 I OUT 10mA 1.2mA I OUT 10mA VIN Is Open CONDITIONS 10Krad(Si) NOTES MIN MAX 1 2 2 3 3 3,8 3,4 6.95 7.05 5 20 4 2 25 100 1.2 1.0 (Postirradiation) (Note 7) 20Krad(Si) 50Krad(Si) MIN MAX MIN MAX 6.95 7.05 5 20 4 2 25 100 1.2 1.0 6.95 7.07 5 20 4.5 2 25 100 1.2 1.0 100Krad(Si) 200Krad(Si) MIN MAX MIN MAX 6.94 7.06 7 22 5 2 25 100 1.2 1.0 6.93 7.07 10 25 6 3 25 150 1.2 1.0 UNITS V ppm/C ppm/C ppm/V ppm/V ppm/mA ppm/mA mA mA 2 RH1021-7 TABLE 1A: ELECTRICAL CHARACTERISTICS 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; TMIN to 25C and 25C to TMAX. Incremental slope is also measured at 25C. 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 150C/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: VIN = 12V, IOUT = 0, TA = 25C, 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. TABLE 2: ELECTRICAL TEST REQUIRE E TS MIL-STD-883 TEST REQUIREMENTS Final Electrical Test Requirements (Method 5004) Group A Test Requirements (Method 5005) Group B and D for Class S, and Group C and D for Class B End Point Electrical Parameters (Method 5005) * PDA Applies to subgroup 1. See PDA Test Notes. SUBGROUP 1*,2,3,4 1,2,3,4 1 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. TOTAL DOSE BIAS CIRCUIT 15V VIN GND -15V 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. UW 3 RH1021-7 TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage 7.01 V IN = 12V IOUT = 0 OUTPUT VOLTAGE (V) LOAD REGULATION (ppm/mA) LOAD REGULATION (ppm/mA) 6.99 1 10 100 TOTAL DOSE Krad (Si) Line Regulation 1.0 15 TEMPERATURE COEFFICIENT (ppm/C) 0.5 LINE REGULATION (ppm/V) 0 -0.5 -1.0 -1.5 -2.0 12V VIN 40V 8.5V VIN 12V 5 0 -5 -10 -15 MINIMUM CURRENT (mA) 1 10 100 TOTAL DOSE Krad (Si) 4 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977 UW RH1021-7 G01 RH1021-7 G04 Load Regulation (Shunt Mode) 60 50 40 30 20 10 0 1000 VIN = OPEN 1.2mA IOUT 10mA 18 16 14 12 10 8 Load Regulation (Sourcing) V IN = 12V 0mA IOUT 10mA NOTE 8 6 4 1 10 100 TOTAL DOSE Krad (Si) 1000 RH1021-7 G02 1 10 100 TOTAL DOSE Krad (Si) 1000 RH1021-7 G03 Temperature Coefficient 0.9 VIN = 12V 10 0.8 0.7 0.6 0.5 0.4 0.3 Minimum Current (Shunt Mode) VIN = OPEN 1000 1 10 100 TOTAL DOSE Krad (Si) 1000 RH1021-7 G05 1 10 100 TOTAL DOSE Krad (Si) 1000 RH1021-7 G06 I.D. No. 66-10-0177 Rev. A 0896 LT/HP 0896 .5K REV A * PRINTED IN USA (c) LINEAR TECHNOLOGY CORPORATION 1990 |
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