LTC1650ACN(1999) データシートの表示（PDF） - Linear Technology

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LTC1650ACN
(Rev.:1999)

Low Glitch 16-Bit Voltage Output DAC

Linear Technology 

LTC1650

DEFINITIONS

Resolution (n)

Resolution is defined as the number of digital input bits,

n. It defines the number of DAC output states (2n) that

divide the full-scale range. The resolution does not imply

linearity.

Full-Scale Voltage (VFS)

This is the output of the DAC when all bits are set to 1. The

output will swing from REFLO to REFHI in unipolar mode

and from (2 • REFLO – REFHI) to REFHI when in bipolar

mode.

Voltage Offset Error (VOS)

This is the voltage at the output when the DAC is loaded

with all zeros.

Least Significant Bit (LSB)

One LSB is the ideal voltage difference between two

successive codes.

LSB = (VFS – VOS)/(2n – 1) = (VFS – VOS)/65535

Integral Nonlinearity (INL)

Endpoint INL is the maximum deviation from a straight

line passing through the endpoints of the DAC transfer

curve. It is measured after adjusting out gain and offset

error for the DAC.

Differential Nonlinearity (DNL)

DNL is the difference between the measured change and

the ideal 1LSB change between any two adjacent codes.

The DNL error between any two codes is calculated as

follows:

DNL = (∆VOUT – LSB)/LSB

∆VOUT = The measured voltage difference between two

adjacent codes.

Gain Error (GE)

Gain error is the difference between the full-scale output of

a DAC from its ideal full-scale value after offset error has

been adjusted for.

Bipolar Zero Error

When configured for bipolar output and with REFLO tied

to 0V, the LTC1650 output should be 0V with (100…00)

loaded in. Any deviation from 0V at this code is called

bipolar zero error.

Bipolar Negative Full-Scale Error

This is the offset error of the LTC1650 in bipolar mode.

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