LT1460HCS3-10 Linear Technology, LT1460HCS3-10 Datasheet - Page 10

• Manufacturer Part Number: LT1460HCS3-10
• Description: Family of Micropower Series References in SOT-23
• Manufacturer: Linear Technology

APPLICATIONS
Output Accuracy
Like all references, either series or shunt, the error budget
of the LT1460S3s is made up of primarily three compo-
nents: initial accuracy, temperature coefficient and load
regulation. Line regulation is neglected because it typically
contributes only 150ppm/V. The LT1460S3s typically
shift 0.02% when soldered into a PCB, so this is also
neglected. The output errors are calculated as follows for
a 100 A load and 0 C to 70 C temperature range:
LT1460HCS3
Initial Accuracy = 0.2%
For I
For Temperature 0 C to 70 C the maximum T = 70 C
LT1460S3 (SOT-23)
10
V
V
OUT
OUT
OUT
= 100 A
= (4000ppm/mA)(0.1mA) = 0.04%
= (20ppm/ C)(70 C) = 0.14%
U
INFORMATION
U
W
U
Total worst-case output error is:
Table 2 gives the worst-case accuracy for LT1460HCS3,
LT1460JCS3 and LT1460KCS3 from 0 C to 70 C, and
shows that if the LT1460HCS3 is used as a reference
instead of a regulator, it is capable of 8 bits of absolute
accuracy over temperature without a system calibration.
Table 2. Worst-Case Output Accuracy over Temperature
100 A
10mA
20mA
I
0 A
0.2% + 0.04% + 0.14% = 0.380%
OUT
LT1460HCS3
0.340%
0.380%
0.640%
0.540%
LT1460JCS3
0.540%
0.580%
0.840%
0.740%
LT1460KCS3
0.850%
0.890%
1.15%
1.05%