LTC1659 Linear Technology, LTC1659 Datasheet - Page 7

• Manufacturer Part Number: LTC1659
• Description: 12-Bit Rail-to-Rail Micropower DAC in MSOP Package
• Manufacturer: Linear Technology

TI I G DIAGRA
DEFI ITIO S
Differential Nonlinearity (DNL): The difference between
the measured change and the ideal 1LSB change for any
two adjacent codes. The DNL error between any two codes
is calculated as follows:
Where V
two adjacent codes.
Digital Feedthrough: The glitch that appears at the analog
output caused by AC coupling from the digital inputs when
they change state. The area of the glitch is specified in
(nV)(sec).
Full-Scale Error (FSE): The deviation of the actual full-
scale voltage from ideal. FSE includes the effects of offset
and gain errors (see Applications Information).
Integral Nonlinearity (INL): The deviation from a straight
line passing through the endpoints of the DAC transfer
curve (Endpoint INL). Because the output cannot go below
zero, the linearity is measured between full scale and the
lowest code which guarantees the output will be greater
W U
DNL = ( V
CS/LD
D
OUT
CLK
D
IN
U
OUT
OUT
PREVIOUS WORD
is the measured voltage difference between
U
– LSB)/LSB
B0
t
9
PREVIOUS WORD
W
B11
t
1
MSB
B11
t
2
B10
t
8
B10
than zero. The INL error at a given input code is calculated
as follows:
Where V
the given input code.
Least Significant Bit (LSB): The ideal voltage difference
between two successive codes.
Resolution (n): Defines the number of DAC output states
(2
imply linearity.
Voltage Offset Error (V
output when the DAC is loaded with all zeros. A single
supply DAC can have a true negative offset, but the output
cannot go below zero (see Applications Information).
For this reason, single supply DAC offset is measured at
the lowest code that guarantees the output will be greater
than zero.
t
4
n
INL = [V
LSB = V
) that divide the full-scale range. Resolution does not
OUT
REF
OUT
is the output voltage of the DAC measured at
/4096
– V
B1
OS
B1
t
– (V
3
OS
): Nominally, the voltage at the
FS
B0
– V
OS
t
6
)(code/4095)]/LSB
LSB
B0
CURRENT WORD
t
5
LTC1659
B11
t
7
1659 TD
7