LT1460JCS3 Просмотр технического описания (PDF) - Linear Technology

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LT1460JCS3

Family of Micropower Series References in SOT-23

Linear Technology 

LT1460S3 (SOT-23)

APPLICATIONS INFORMATION

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 100µA load and 0°C to 70°C temperature range:

LT1460HCS3

Initial Accuracy = 0.2%

For IOUT = 100µA

∆VOUT = (4000ppm/mA)(0.1mA) = 0.04%

For Temperature 0°C to 70°C the maximum ∆T = 70°C

∆VOUT = (20ppm/°C)(70°C) = 0.14%

Total worst-case output error is:

0.2% + 0.04% + 0.14% = 0.380%

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

IOUT

LT1460HCS3

0µA

0.340%

LT1460JCS3

0.540%

LT1460KCS3

0.850%

100µA

0.380%

0.580%

0.890%

10mA

0.640%

0.840%

1.15%

20mA

0.540%

0.740%

1.05%

10

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