Datasheet

LTC3883/LTC3883-1
6
3883fa
For more information www.linear.com/LTC3883
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, V
RUN
= 3.3V, f
SYNC
= 500kHz (externally
driven) unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
INRANGE
Full-Scale Voltage 4.5 20 V
V
INSTP
Step Size 82 mV
V
INTHACC
Threshold Accuracy 8.75V < V
IN
< 20V
l
±2.5 %
t
PROPVIN
Comparator Response Time
(VIN_ON and VIN_OFF)
V
OD
= 10% of Threshold 100 µs
Output Voltage Readback
N Resolution
LSB Step Size
16
244
Bits
µV
V
F/S
Full-Scale Sense Voltage (Note 10) V
RUN
= 0V (Note 8) 8 V
V
OUT_TUE
Total Unadjusted Error T
J
= 25°C, V
OUT
> 0.6V
(Note 8)
l
0.2
0.5
%
%
V
OS
Zero-Code Offset Voltage
l
±500 µV
t
CONVERT
Conversion Time (Note 6) 90 ms
V
IN
Voltage Readback
N Resolution (Note 5) 10 Bits
V
F/S
Full-Scale Input Voltage (Note 11) 38.91 V
V
IN_TUE
Total Unadjusted Error T
J
= 25°C, V
VIN
> 4.5V
l
0.4
2
%
%
t
CONVERT
Conversion Time (Note 6) 90 ms
Output Current Readback
N Resolution
LSB Step Size
(Note 5)
0V ≤ |V
ISENSE
+
– V
ISENSE
–
| < 16mV
16mV ≤ |V
ISENSE
+
– V
ISENSE
–
| < 32mV
32mV ≤ |V
ISENSE
+
– V
ISENSE
–
| < 63.9mV
63.9mV ≤ |V
ISENSE
+
– V
ISENSE
–
| < 127.9mV
10
15.25
31.25
62.5
125
Bits
µV
µV
µV
µV
I
F/S
Full-Scale Input Current (Note 7) R
ISENSE
= 1mΩ ±128 A
I
OUT_TUE
Total Unadjusted Error (Note 8) V
ISENSE
> 6mV
l
±1 %
V
OS
Zero-Code Offset Voltage ±28 µV
t
CONVERT
Conversion Time (Note 6) 90 ms
Input Current Readback
N Resolution
LSB Step Size
(Note 5)
8x Gain, 0V ≤ |V
IN_SNS
– I
IN_SNS
| ≤ 8mV
4x Gain, 0V ≤ |V
IN_SNS
– I
IN_SNS
| ≤ 20mV
2x Gain, 0V ≤ |V
IN_SNS
– I
IN_SNS
| ≤ 50mV
10
15.26
30.52
61
Bits
µV
µV
µV
I
IN_TUE
Total Unadjusted Error 8x Gain, V
ISENSE
> 2.5mV (Note 8)
4x Gain, V
ISENSE
> 4mV (Note 8)
2x Gain, V
ISENSE
> 6mV (Note 8)
l
l
l
±1.6
±1.3
±1.2
%
%
%
V
OS
Zero-Code Offset Voltage ±50 µV
t
CONVERT
Conversion Time (Note 6) 180 ms
Supply Current Readback
N Resolution
LSB Step Size
(Note 5) 10
122
Bits
µV
I
CHIP_TUE
Total Unadjusted Error (LTC3883 Only)
Total Unadjusted Error (LTC3883-1 Only)
l
l
±5
±200
%
µA
t
CONVERT
Conversion Time (Note 6) 180 ms
Duty Cycle Readback
D_RES Resolution (Note 5) 10 Bits
D_TUE Total Unadjusted Error 16.3% Duty Cycle –3 3 %
t
CONVERT
Conversion Time (Note 6) 90 ms