Datasheet RH1021-7 Datasheet (Linear Technology)

ABSOLUTE MAXIMUM RATINGS

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WW

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DESCRIPTION

TOP VIEW

NC*

NC*

NC*

V

IN

V

OUT

NC*

NC*

GND

8

7

6

5

2

1

4

H PACKAGE

8-LEAD TO-5 METAL CAN

3

RH1021-7

Precision 7V Reference

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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 in­house Class S flow to yield circuits usable in stringent
military applications.

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BUR -I CIRCUIT

8

1

7

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 .............. –55°C to 125°C

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec)..................300°C

, LTC and LT are registered trademarks of Linear Technology Corporation.

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PACKAGE/ORDER INFORMATION

220V

RH1021-7

3

–20V

6

5

4

* Connected internally. Do not connect external

circuitry to these pins.

1

RH1021-7

TABLE 1: ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS NOTES MIN TYP MAX GROUP MIN TYP MAX GROUP UNITS

V

OUT

TCV

V

V

V

I

I

S

I

MIN

Output Voltage 1 6.95 7.05 1 V
Output Voltage RH1021BM-7 2 5 2,3 ppm/°C

OUT

Temperature Coefficient RH1021DM-7 2 20 2,3 ppm/°C
Line Regulation 8.5V VIN 12V 3 4 1 8 2,3 ppm/V

OUT

IN

Load Regulation 0 I

OUT

(Sourcing Current)

OUT

Load Regulation (Shunt Mode) 1.2mA I

Supply Current (Series Mode) 1.2 1 1.5 2,3 mA
Minimum Current (Shunt Mode) VIN Is Open 1.0 1 1.2 2,3 mA
Output Voltage Noise 0.1Hz f 10Hz 5 4 µV

Long-Term Stability T = 1000 Hrs 6 7 ppm
of V

OUT

Temperature Hysteresis T = ±25°C 3 ppm
of V

OUT

12V VIN 40V 3 2 1 4 2,3 ppm/V

10mA 3 25 1 40 2,3 ppm/mA

OUT

10mA 3,4 100 1 150 2,3 ppm/mA

OUT

10Hz f 1kHz 5 4 4 µV

Noncumulative

(Preirradiation) (Note 9)

TA = 25°C SUB- SUB-

–55°C TA 125°C

P-P

RMS

TABLE 1A: ELECTRICAL CHARACTERISTICS

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

V

OUT

TCV

V

V

V

I

I

MIN

I

S

Output Voltage 1 6.95 7.05 6.95 7.05 6.95 7.07 6.94 7.06 6.93 7.07 V
Output Voltage RH1021BM-7 2 5 5 5 7 10 ppm/°C

OUT

Temperature Coefficient RH1021DM-7 2 20 20 20 22 25 ppm/°C
Line Regulation 8.5V VIN 12V 3 4 4 4.5 5 6 ppm/V

OUT

IN

Load Regulation 0 I

OUT

(Sourcing Current)

OUT

Load Regulation 1.2mA I
(Shunt Mode)

Minimum Current VIN Is Open 1.2 1.2 1.2 1.2 1.2 mA
(Shunt Mode)

Supply Current 1.0 1.0 1.0 1.0 1.0 mA
(Series Mode)

12V VIN 40V 3 2 2 2 2 3 ppm/V

10mA 3,8 25 25 25 25 25 ppm/mA

OUT

10mA 3,4 100 100 100 100 150 ppm/mA

OUT

(Postirradiation) (Note 7)

2

TABLE 1A: ELECTRICAL CHARACTERISTICS

RH1021-7

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
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.

to 25°C and 25°C to T

MIN

MAX

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.

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= 12V, I

IN

OUT(MAX)

= 12V, I

IN

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Note 7: V
Note 8: I

100Krad (Si).
Note 9: V

TABLE 2: ELECTRICAL TEST REQUIRE E TS

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

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.

= 0, TA = 25°C, unless otherwise noted.

OUT

(Sourcing) is 5mA for exposures greater than

= 0, unless otherwise noted.

OUT

TOTAL DOSE BIAS CIRCUIT

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.

15V

V

GND

–15V

IN

3

RH1021-7

TOTAL DOSE Krad (Si)

1

LOAD REGULATION (ppm/mA)

18

16

14

12

10

8

6

4

10 100 1000

RH1021-7 G03

VIN = 12V
0mA ≤ I

OUT

≤ 10mA

NOTE 8

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TYPICAL PERFORMANCE CHARACTERISTICS

Output Voltage

7.01
VIN = 12V

= 0

I

OUT



OUTPUT VOLTAGE (V)

6.99

1

TOTAL DOSE Krad (Si)

Line Regulation

1.0

0.5

0

–0.5

10 100 1000

RH1021-7 G01

12V ≤ VIN ≤ 40V

8.5V ≤ VIN ≤ 12V

Load Regulation (Shunt Mode) Load Regulation (Sourcing)

60

VIN = OPEN

1.2mA ≤ I

50

40

30

20

LOAD REGULATION (ppm/mA)

10

0

1

Temperature Coefficient

15

VIN = 12V

10

5

0

≤ 10mA

OUT

10 100 1000

TOTAL DOSE Krad (Si)

RH1021-7 G02

Minimum Current (Shunt Mode)

0.9
VIN = OPEN

0.8

0.7

0.6

–1.0

LINE REGULATION (ppm/V)

–1.5

–2.0

1

4

–5

–10

TEMPERATURE COEFFICIENT (ppm/°C)

–15

10 100 1000

TOTAL DOSE Krad (Si)

RH1021-7 G04

1

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

[phone]

●

FAX

: [phone]

●

TELEX

: 499-3977

10 100 1000

TOTAL DOSE Krad (Si)

RH1021-7 G05

0.5

MINIMUM CURRENT (mA)

0.4

0.3

1



10 100 1000

TOTAL DOSE Krad (Si)

I.D. No. 66-10-0177 Rev. A 0896

LT/HP 0896 .5K REV A • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 1990

RH1021-7 G06