LTC1650 Linear Technology, LTC1650 Datasheet - Page 8

• Manufacturer Part Number: LTC1650
• Description: Low Glitch 16-Bit Voltage Output DAC
• Manufacturer: Linear Technology

DEFINITIONS
LTC1650
Resolution (n)
Resolution is defined as the number of digital input bits,
n. It defines the number of DAC output states (2
divide the full-scale range. The resolution does not imply
linearity.
Full-Scale Voltage (V
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 (V
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.
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.
8
LSB = (V
U
FS
– V
U
OS
)/(2
FS
OS
n
)
– 1) = (V
)
FS
– V
OS
)/65535
n
) that
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:
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.
DNL = ( V
adjacent codes.
V
OUT
= The measured voltage difference between two
OUT
– LSB)/LSB