Datasheet

LT2940
3
2940f
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply
V
CC
Supply Voltage Operating Range
l
680V
I
CC
Supply Current I
PMON
= +200µA, I
IMON
= +200µA
(Note 2)
l
2 3.5 5 mA
V
CC(UVLC)
Supply Undervoltage Latch Clear V
CC
Falling
l
2.3 2.5 2.7 V
∆V
CC(HYST)
Supply Undervoltage Hysteresis V
CC
Rising
l
20 75 100 mV
Voltage Sense
V
VSEN(OR)
Voltage Sense Pin Operating Range V
CC
≤ 12V
l
–0.1 V
CC
– 3 V
12V < V
CC
< 30V
l
–0.1 9 V
V
+
Pin and V
–
Pin V
CC
≥ 30V
l
–0.1 18 V
V
V
Voltage Sense Differential Input Voltage Range
(Note 5)
V
CC
< 11V
l
±(V
CC
– 3) V
V
V
= V
V
+
– V
V
–
V
CC
≥ 11V
l
±8 V
V
V(CL)
Voltage Sense Differential Clipping Limit
(Note 5)
V
CC
≥ 12V
l
±9 V
I
VSEN
Voltage Sense Input Bias Current
V
+
Pin and V
–
Pin
l
–300 –100 100 nA
∆I
VSEN
Voltage Sense Input Offset Current
∆I
VSEN
= I
V
+
– I
V
–
V
V
+
= V
V
–
l
±50 ±150 nA
Current Sense
V
ISEN(OR)
Current Sense Pin Operating Range
I
+
Pin and I
–
Pin
l
480V
V
I
Current Sense Differential Input Voltage
Range (Note 6)
V
I
= V
I
+
– V
I
–
l
±200 mV
V
I(CL)
Current Sense Differential Clipping Limit
(Note 6)
l
±225 mV
I
ISEN
Current Sense Input Bias Current
I
+
Pin and I
–
Pin
l
75 100 125 µA
∆I
ISEN
Current Sense Input Offset Current
∆I
ISEN
= I
I
+
– I
I
–
V
I
+
= V
I
–
l
±200 ±800 nA
Power Monitor (Note 2)
I
PMON(OR)
Power Monitor Output Current Operating
Range
l
±200 µA
I
PMON(CAPA)
Power Monitor Output Current Capability V
CC
≥ 12V, V
PMON
≥ 0V, and
V
V
= –9V, V
I
= –225mV, or
V
V
= 9V, V
I
= 225mV
l
900 1200 µA
V
CC
≥ 12V, V
PMON
≥ 0.5V, and
V
V
= –9V, V
I
= 225mV, or
V
V
= 9V, V
I
= –225mV
l
–240 –1200 µA
V
CC
≥ 12V, V
PMON
≥ 4V, and
V
V
= –9V, V
I
= 225mV, or
V
V
= 9V, V
I
= –225mV
l
–800 –1200 µA
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. All specifi cations apply at 6V ≤ V
CC
≤ 80V, unless otherwise specifi ed.