MAX5186-MAX5189 MAXIM [Maxim Integrated Products], MAX5186-MAX5189 Datasheet - Page 9

• Manufacturer Part Number: MAX5186-MAX5189
• Description: Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs
• Manufacturer: MAXIM [Maxim Integrated Products]

Integral nonlinearity (INL) (Figure 5a) is the deviation of
the values on an actual transfer function from either a
best-straight-line fit (closest approximation to the actual
transfer curve) or a line drawn between the endpoints
of the transfer function once offset and gain errors have
been nullified. For a DAC, the deviations are measured
every single step.
Differential nonlinearity (DNL) (Figure 5b) is the differ-
ence between an actual step height and the ideal value
of 1LSB. A DNL error specification of less than 1LSB
guarantees no missing codes and a monotonic transfer
function.
Figure 1. Functional Diagram
Applications Information
REFO
REFR
CLK
*INTERNAL 400Ω AND 9.6kΩ
RESISTORS FOR MAX5189 ONLY.
_______________________________________________________________________________________
1.2V REF
Performance Definitions
9.6k*Ω
REN
Dual, 8-Bit, 40MHz, Current/Voltage,
Differential Nonlinearity
Static and Dynamic
Integral Nonlinearity
LATCHES
LATCHES
DECODE
OUTPUT
INPUT
MSB
AV
DAC1 SWITCHES
DAC2 SWITCHES
DD
Simultaneous-Output DACs
D7–D0
SOURCE ARRAY
CURRENT-
AGND
LATCHES
LATCHES
OUTPUT
INPUT
DECODE
MSB
Offset error (Figure 5c) is the difference between the
ideal and the actual offset point. For a DAC, the offset
point is the step value when the digital input is zero.
This error affects all codes by the same amount and
can usually be compensated by trimming.
Gain error (Figure 5d) is the difference between the
ideal and the actual full-scale output voltage on the
transfer curve after nullifying the offset error. This error
alters the slope of the transfer function and corre-
sponds to the same percentage error in each step.
Settling time is the amount of time required from the start
of a transition until the DAC output settles its new output
value to within the converter’s specified accuracy.
CS
DACEN
400Ω*
DV
MAX5186
MAX5189
DD
400Ω*
DGND
PD
400Ω* 400Ω*
OUT1P
OUT1N
OUT2N
OUT2N
CREF1
CREF2
Settling Time
Offset Error
Gain Error
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