Datasheet

MAX5236/MAX5237
Single-Supply 3V/5V, Voltage-Output, Dual,
Precision 10-Bit DACs
6 _______________________________________________________________________________________
TIMING CHARACTERISTICS—MAX5236 (FIGURES 1 AND 2)
(V
DD
= +2.7V to +3.6V, GND = 0, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCLK Clock Period t
CP
74 ns
SCLK Pulse Width High t
CH
30 ns
SCLK Pulse Width Low t
CL
30 ns
CS Fall to SCLK Rise Setup Time t
CSS
30 ns
SCLK Rise to CS Rise Hold Time t
CSH
0ns
DIN Setup Time t
DS
30 ns
DIN Hold Time t
DH
0ns
SCLK Rise to CS Fall Delay t
CS0
10 ns
CS Rise to SCLK Rise Hold Time t
CS1
30 ns
CS Pulse Width High t
CSW
75 ns
LDAC Pulse Width Low t
LDL
30 ns
CS Rise to LDAC Rise Hold Time t
CSLD
(Note 9) 75 ns
Note 1: Accuracy is guaranteed in the following way:
Note 2: Offset is measured at the code closest to 12mV.
Note 3: Gain from V
REF
_ to V
OUT
_ is typically 1.638
✕
CODE/1024.
Note 4: DC crosstalk is measured as follows: set DAC A to midscale, and DAC B to zero, and measure DAC A output; then change
DAC B to full scale and measure ∆V
OUT
for DAC A. Repeat the same measurement with DAC A and DAC B interchanged.
DC crosstalk is the maximum ∆V
OUT
measured.
Note 5: The DAC output voltage is derived by gaining up V
REF
by 1.638
✕
CODE/1024. This gain factor may cause V
OUT
to try to
exceed the supplies. The maximum value of V
REF
in the reference input range spec prevents this from happening at full
scale. The minimum V
REF
value of 0.25V is determined by linearity constraints, not DAC functionality.
Note 6: Accuracy is better than 1LSB for V
OUT
= 12mV to V
DD
- 180mV.
Note 7: Guaranteed by design. Not production tested.
Note 8: R
LOAD
= ∞ and digital inputs are at either V
DD
or GND. V
OUT
= full-scale output voltage.
Note 9: This timing requirement applies only to CS rising edges, which execute commands modifying the DAC input register contents.
V
DD
V
REF
_ ACCURACY GUARANTEED FROM CODE TO CODE
3 1.250 6 1023
5 2.500 3 1023