Datasheet

LT2940
6
2940f
–4
–1500
–1000
–500
0
500
1500
–2 0
2940 G04
24
1000
V
PMON
= 0V
V
PMON
= 0.5V
I
PMON
(µA)
V
V
• V
I
(V
2
)
V
CC
≥ 15V
V
V
= 40 • V
I
V
PMON
= 4V
–5
–300
–200
–100
0
100
300
05
2940 G05
10 15 20
200
I = 200µA
OUTPUT CURRENT (µA)
OUTPUT VOLTAGE (V)
T
A
= 25°C
V
CC
= 6V
V
CC
= 12V
V
CC
= 30V
I = –200µA
V
CC
= 6V
V
CC
= 12V
V
CC
=
30V
0
2.4
2.6
2.8
3.0
3.2
3.6
20 40
2940 G06
60 80 100
3.4
I
PMON
= 200µA
I
IMON
= 200µA
I
PMON
= 0µA
I
IMON
= 0µA
I
CC
(mA)
V
CC
(V)
I
PMON
= –200µA
I
IMON
= –200µA
–300
–300
–200
–100
0
100
300
–200
–100 0 100
2940 G07
200 300
200
V
IMON
= 0V
V
IMON
= 0.5V
I
IMON
(µA)
V
I
(mV)
V
I
= V
I
+ – V
I
OUTPUT CURRENT IS
APPROXIMATELY FLAT
TO ABSOLUTE MAXIMUM
VOLTAGE LIMITS
V
I
(mV)
–200
1
0
–1
0 200
–2
2
2940 G08
E
IMON
(%FS)
V
CC
= 12V
V
CC
= 80V
ONE REPRESENTATIVE UNIT
TEMPERATURE (°C)
–50
E
IMON
(%FS)
–3
–1
0
1
3
0
50
75
–2
2
–25
25
100
125
2949 G09
–200mV ≤ V
I
≤ 200mV
V
I
= 12V
V
CC
= 12V
V
CC
= 80V
V
CC
= 80V
V
CC
= 12V
TYPICAL PERFORMANCE CHARACTERISTICS
PMON Current
vs Power Sense Product
PMON and IMON Voltage
Compliance Supply Current vs Supply Voltage
IMON Current vs Current
Sense Voltage
IMON Total Error vs Current
Sense Voltage
IMON Error Band vs Temperature
PMON Step Response PMON Step Response IMON Step Response
500ns/DIV
V
IMON
200mV/DIV
2940 G10
R
PMON
= 2k ON 2V
DC
BIAS
C
L
= 8pF
V
CC
= 12V
T
A
= 25°C
V
V
= ±2V
V
I
= 200mV
250ns/DIV
V
IMON
200mV/DIV
2940 G11
R
PMON
= 2k ON 2V
DC
BIAS
C
L
= 8pF
V
CC
= 12V
T
A
= 25°C
V
I
= ±200mV
V
V
= 2V
250ns/DIV
V
IMON
200mV/DIV
2940 G12
R
IMON
= 2k ON 2V
DC
BIAS
C
L
= 8pF
V
CC
= 12V
T
A
= 25°C
V
I
= ±200mV