Datasheet

5
LT1389
Reverse Characteristics
Reverse Voltage Change
vs Current
Dynamic Impedance vs Frequency
Forward CharacteristicsReverse Dynamic Impedance
0.1Hz to 10Hz Noise
200ms/DIV
I
R
= 0.8µA
C
OUT
= 0.1µF
Response Time
0V
1ms/DIV
1389-1.25 G08
0V
Response Time
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (µA)
0.4
0.6
1.6
1389-1.25 G01
0.2
0
0.4
0.8
1.2
1.0
0.8
T
A
= –40°C TO 85°C
TEMPERATURE (°C)
–40
REFERENCE VOLTAGE CHANGE (mV)
1.5
20
1389-1.25 G02
0
–1.0
–20 0 40
–1.5
–2.0
2.0
1.0
0.5
–0.5
60
80
I
R
= 250µA
I
R
= 0.8µA
Temperature Drift
FREQUENCY (kHz)
0.1
DYNAMIC IMPEDANCE (kΩ)
1
10
100
0.1 1 10
1389-1.25 G05
0.01
0.01
I
R
= 0.8µA
C
OUT
= 0µF
I
R
= 0.8µA
C
OUT
= 0.047µF
I
R
= 10µA
C
OUT
= 0.1µF
I
R
= 10µA
C
OUT
= 0µF
T
A
= 25°C
TIME (SEC)
0
NOISE VOLTAGE (µV/DIV)
5
15
25
40
1389-1.25 G07
–5
–15
0
10
20
–10
–20
–25
10
20
30
50
7060
I
R
= 0.8µA
1.25V TYPICAL PERFOR A CE CHARACTERISTICS
UW
1.5V
1V
0.5V
5V
I
R
= 0.8µA
C
OUT
= 0µF
1.5V
1V
0.5V
0V
5V
0V
1389-1.25 G09
FORWARD CURRENT (mA)
0.001
0.4
FORWARD VOLTAGE (V)
0.5
0.6
0.7
0.8
0.01 0.1 1 10 100
1389-1.25 G06
0.3
0.2
0.1
0
0.9
1.0
T
A
= 25°C
REVERSE CURRENT (mA)
0.001
0.1
DYNAMIC IMPEDANCE (Ω)
10
1000
0.10.01 101
1389-1.25 G04
1
100
T
A
= 25°C
f = 25Hz
REVERSE CURRENT (mA)
0.4
REVERSE VOLTAGE CHANGE (mV)
0.8
1.2
0.001 0.1 101
1389-1.25 G03
0
0.6
1.0
0.2
0.01
25°C
85°C
–40°C