4
LT1236
E
LECTR
IC
AL C CHARA TERIST
ICS
V
IN
= 15V, I
OUT
= 0, T
A
= 25°C, unless otherwise noted.
realized by preconditioning the IC with a 100-200 hour, 125°C burn in.
Long term stability will also be affected by differential stresses between the
IC and the board material created during board assembly. Temperature
cycling and baking of completed boards is often used to reduce these
stresses in critical applications.
Note 7: Hysteresis in output voltage is created by package stress that
differs depending on whether the IC was previously at a higher or lower
temperature. Output voltage is always measured at 25°C, but the IC is
cycled to 50°C or 0°C before successive measurements. Hysteresis is
roughly proportional to the square of temperature change. Hysteresis is
not normally a problem for operational temperature excursions, but can be
significant in critical narrow temperature range applications where the
instrument might be stored at high or low temperatures.
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Ripple Rejection
INPUT VOLTAGE (V)
0
85
REJECTION (dB)
90
95
100
105
10 20
30
40
LT1236 G01
110
115
515
25
35
f = 150Hz
LT1236-5
LT1236-10
FREQUENCY (Hz)
10
90
REJECTION (dB)
110
130
120
100
80
60
100 1k 10k
LT1236 G02
70
50
V
IN
= 15V
C
OUT
= 0
LT1236-5
LT1236-10
Ripple Rejection
Minimum Input/Output
Differential, LT1236-10
OUTPUT CURRENT (mA)
0
INPUT/OUTPUT VOLTAGE (V)
1.2
1.6
16
LT1236 G03
0.8
0.4
0
4
8
12
20
1.0
1.4
0.6
0.2
14
2
6
10
18
T
J
= 125 °C
T
J
= –55 °C
T
J
= 25 °C
Start-Up (Series Mode)
TIME (µs)
3
OUTPUT VOLTAGE (V)
4
6
7
8
13
10
2
6
8
LT1236 G04
5
11
12
9
04
10
12
14
LT1236-10
LT1236-5
V
IN
= 0V TO 12V
Start-Up (Shunt Mode), LT1236-10 Output Voltage Noise Spectrum
FREQUENCY (Hz)
100
NOISE VOLTAGE (nV/√Hz)
200
250
350
400
10 1k 1M
LT1236 G06
0
100
300
150
50
LT1236-10
LT1236-5
TIME (µs)
OUTPUT VOLTAGE (V)
9
10
11
48
LT1236 G05
8
7
02
61012
6
5
LT1236-10
IN
GND
OUT
NC
1k
V
OUT
0V
V
OUT
+ 2V
