Datasheet

LT2940
4
2940f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
PMON
Power Monitor Output Compliance Voltage V
CC
≤ 12V, I
PMON
≥ 0µA
l
0V
CC
– 4.5 V
12V < V
CC
< 30V, I
PMON
≥ 0µA
l
0 7.5 V
V
CC
≥ 30V, I
PMON
≥ 0µA
l
012V
V
CC
≤ 12V, I
PMON
< 0µA
l
0.5 V
CC
– 4.5 V
12V < V
CC
< 30V, I
PMON
< 0µA
l
0.5 7.5 V
V
CC
≥ 30V, I
PMON
< 0µA
l
0.5 12 V
E
PMON
Power Monitor Output Total Error (Note 4) |V
V
• V
I
| ≤ 0.4V
2
±2 ±5 %FS
|V
V
• V
I
| ≤ 0.4V
2
, 25°C < T
A
≤ 85°C ±2.5 ±7 %FS
|V
V
• V
I
| ≤ 0.4V
2
, LT2940C
l
±2.5 ±9 %FS
|V
V
• V
I
| ≤ 0.4V
2
, LT2940I
l
±3.5 ±12 %FS
Quadrants I and III of Shaded Region
in Figure 4
l
±5 ±15 %FS
K
PMON
Power Monitor Scaling Coeffi cient
I
PMON
= K
PMON
• V
V
• V
I
|V
V
• V
I
| = 0.4V
2
l
485 500 515 µA/V
2
V
V(OSP)
Power Monitor Voltage Sense Input-Referred
Offset Voltage
V
V
= 0V
l
±40 ±100 mV
V
I(OSP)
Power Monitor Current Sense Input-Referred
Offset Voltage
V
I
= 0mV
l
±2 ±6 mV
I
PMON(OS)
Power Monitor Output Offset Current V
V
–
= 0V, V
I
= 0mV
l
±6 ±15 µA
BW
PMON
Power Monitor Output Bandwidth R
PMON
= 2k 0.5 MHz
Current Monitor (Note 2)
I
IMON(FS)
Current Monitor Output Current Operating
Range
l
±200 µA
V
IMON
Current Monitor Output Compliance Voltage V
CC
≤ 12V, I
IMON
≥ 0µA
l
0V
CC
– 4.5 V
12V < V
CC
< 30V, I
IMON
≥ 0µA
l
0 7.5 V
V
CC
≥ 30V, I
IMON
≥ 0µA
l
012V
V
CC
≤ 12V, I
IMON
< 0µA
l
0.5 V
CC
– 4.5 V
12V < V
CC
< 30V, I
PMON
< 0µA
l
0.5 7.5 V
V
CC
≥ 30V, I
PMON
< 0µA
l
0.5 12 V
E
IMON
Current Monitor Output Total Error (Note 4) |V
I
| ≤ 200mV, 25°C ≤ T
A
≤ 85°C ±1.5 ±3 %FS
|V
I
| ≤ 200mV, LT2940C
l
±2 ±3.5 %FS
|V
I
| ≤ 200mV, LT2940I
l
±2 ±4 %FS
200mV < |V
I
| ≤ 225mV
l
±2.5 ±5 %FS
G
IMON
Current Monitor Scaling, I
IMON
= G
IMON
• V
I
V
I
= ±200mV
l
975 1000 1025 µA /V
V
I(OSI)
Current Monitor Current Sense Input-Referred
Offset Voltage
l
±2.5 ±7 mV
BW
IMON
Current Monitor Output Bandwidth R
IMON
= 2k 1 MHz
Comparator
V
CMP(TH)
Comparator Threshold Voltage CMP
+
Rising
l
1.222 1.240 1.258 V
∆V
CMP(HYST)
Comparator Threshold Hysteresis CMP
+
Falling
l
–15 –35 –60 mV
I
CMP(BIAS)
Comparator Input Bias Current 1V ≤ V
CMP
+
≤ 1.5V
l
±100 ±300 nA
I
CMPOUT(OL)
CMPOUT Output Low Voltage CMP
+
High, I
CMPOUT
= 3mA
l
0.2 0.4 V
ELECTRICAL CHARACTERISTICS
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.