Datasheet

DS4830
Optical Microcontroller
4Maxim Integrated
DAC DC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.97V to 3.63V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +25NC.)
FAST COMPARATOR/QUICK TRIPS DC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.97V to 3.63V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +25NC.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DAC Resolution DAC
R
12 Bits
DAC Internal Reference Accuracy DACREFACC 2.5V internal reference -1.25 +1.25 %
DAC Internal Reference Power-Up
Speed
t
DACPUP
99% settled 10 Fs
Reference Input Full-Scale Range
(REFINA, REFINB)
REFFS 1 2.5 V
DAC Operating Current I
DACS
Per channel
See the DC Electrical
Characteristics
DAC Integral Nonlinearity DACINL 12-bit at 2.5V reference 12 LSB
DAC Differential Nonlinearity DACDNL
12-bit at 2.5V reference,
guaranteed by design, not
production tested
1 LSB
DAC Offset V
OFFSET-DAC
At code “0” 0 18 mV
DAC Source Load Regulation I
DAC-SOURCE
0 to full-scale output 8.6 mV/mA
DAC Sink Capability and Sink Load
Regulation
R
DAC-SINK
0 to 0.5V output, limited by output
buffer impedance
500
I
I
DAC-SINK
0.5V to full-scale output 11.5 mV/mA
DAC Settling Time t
DAC
Output load capacitance between
33pF and 270pF, from 10% to 90%
10 Fs
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fast Comparator Resolution FC
R
8 Bits
Fast Comparator Internal Reference
Accuracy
FCREFACC -1.25 +1.25 %
Fast Comparator Operating Current I
FASTCOMP
See the DC Electrical
Characteristics
Fast Comparator Full Scale V
FS-COMP
2.38 2.42 2.48 V
Fast Comparator Integral
Nonlinearity
INL
Differential mode, 2.2nF capacitor
at input, tested at worst-case
positions
±2 LSB
Fast Comparator Differential
Nonlinearity
DNL
Differential mode, 2.2nF capacitor
at input, guaranteed by design
1 LSB
Fast Comparator Offset V
OFFSET-COMP
2 LSB
Fast Comparator Input Resistance R
IN-COMP
(Note 6) 15 MI
Fast Comparator Input Capacitance C
IN-COMP
4 pF
Fast Comparator Sample Rate f
COMP
625 ksps