Radiation characteristics

ST1843 - ST1845

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Doc ID 019049 Rev 1

6.1.2

Electrical measurements for total dose radiation testing

Prior to irradiation testing the devices shall have successfully met room temperature

electrical measurements specified herein.

The test methods and test conditions shall be as per the corresponding test defined in

electrical measurements at room temperature. The parameters to be measured during and

on completion of irradiation testing are shown below.

Table 7.

Electrical parameter during irradiation testing

Symbol

Parameter

Test conditions

Values

Unit

Min.

Max.

Reference section

Output voltage for ST1843

4.95

5.15

V

Output voltage for ST1845

4.85

5.15

ΔV

REF_LINE

Line regulation

12V

≤ V

0.02

V

ΔV

REF_LOAD

Load regulation

1

≤ I

0.025

V

Output short circuit current

-0.18

-0.03

A

Oscillator section

Frequency

49

65

kHz

Frequency change with

voltage

12V

≤ V

-1

1

%

IDISCHG

Discharge current

0.0078 0.0088

A

Error amp section

I

nput voltage for ST1843

2.45

2.6

V

I

nput voltage for ST1845

2.45

2.55

Input bias current ST1843

-2.75

µA

Input bias current ST1845

-2.8

AVOL

AVOL for ST1843

4V

60

dB

AVOL for ST1845

62

PSRR

Power supply rejection ratio 12V

≤ V

60

dB

IO_SINK

Output sink current

2.7V; VPIN1 = 1.1V

2mA

IO_SOURCE

Output source current

2.3V; VPIN1 = 5V

-0.5

mA

VOUT high

2.3V; RL = 15K to GND

5V

VOUT low

1.1

V