LT1021
TYPICAL PERFOR A CE CHARACTERISTICS
Shunt Characteristics LT1021-7
1.2
1.0
0.8
0.6
0.4
0.2
0
0
7
1
3
8
2
5
6
4
OUTPUT TO GROUND VOLTAGE (V)
9
T
J
= 125°C
T
J
= – 55°C
T
J
= 25°C
INPUT PIN OPEN
CURRENT INTO OUTPUT (mA)
60
50
40
30
20
10
0
0
2
4
6
8 10 12 14
OUTPUT VOLTAGE (V)
16
18
CURRENT INTO OUTPUT (mA)
OUTPUT CHANGE (mV)
Load Transient Response
LT1021-7, C
LOAD
= 0
I
SINK
= 0.8mA
I
SOURCE
= 0
I
SINK
= 1.2mA
5mV
50mV
I
SOURCE
= 0.5mA
I
SINK
= 1.4mA
I
SOURCE
= 2-10mA
∆I
SOURCE
= 100µA
P-P
0
1
2
I
SINK
= 2-10mA
∆I
SINK
= 100µA
P-P
1
2
3
4
5mV
20mV
OUTPUT VOLTAGE NOISE (5µV/DIV)
OUTPUT VOLTAGE CHANGE
OUTPUT VOLTAGE CHANGE
3 4 0
TIME (µs)
NOTE VERTICAL SCALE CHANGE
BETWEEN SOURCING AND SINKING
LT1021 G22
Output Voltage Temperature
Drift LT1021-10
10.006
10.004
OUTPUT CHANGE (mV)
OUTPUT VOLTAGE (V)
10.002
10.000
9.998
9.996
9.994
– 50 –25
2
1
0
–1
–2
–3
–4
INPUT CURRENT (mA)
50
0
75
25
TEMPERATURE (°C)
U W
1021 G19
Shunt Mode Current Limit
LT1021-7
INPUT PIN OPEN
Thermal Regulation LT1021-7
V
IN
= 27V
∆POWER
= 200mW
0
– 0.5
–1.0
–1.5
I
LOAD
= 10mA
THERMAL
REGULATION*
LOAD
REGULATION
0
20
40 60 80
TIME (ms)
100 120 140
LT1021 G20
*INDEPENDENT OF TEMPERATURE COEFFICIENT
LT1021 G21
Load Transient Response
LT1021-7, C
LOAD
= 1000pF
I
SOURCE
= 0
I
SINK
= 0.6mA
Output Noise 0.1Hz to 10Hz
LT1021-7
FILTERING = 1 ZERO AT 0.1Hz
2 POLES AT 10Hz
5µV (0.7ppm)
I
SINK
= 0.8mA
I
SOURCE
= 0.5mA
I
SINK
= 1mA
I
SOURCE
= 2-10mA
∆I
SOURCE
= 100µA
P-P
0
5
I
SINK
= 2-10mA
∆I
SINK
= 100µA
P-P
5
10 15 20
10 15 20 0
5µs/DIV
0
1
4
3
2
TIME (MINUTES)
5
6
NOTE VERTICAL SCALE CHANGE
BETWEEN SOURCING AND SINKING
LT1021 G23
LT1021 G24
Load Regulation
LT1021-7, LT1021-10
5
4
3
V
IN
= 12V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Input Supply Current LT1021-10
I
OUT
= 0
T
J
= – 55°C
T
J
= 25°C
T
J
= 125°C
100
125
–5
–10 – 8 – 6 – 4 – 2
SOURCING
0
2
4 6 8
SINKING
10
0
0
5
10
15 20 25 30
INPUT VOLTAGE (V)
35
40
LT1021 G25
OUTPUT CURRENT (mA)
1021 G26
1021 G27
7
LINER [ LINEAR TECHNOLOGY ]
