Rainbow-electronics MAX5295 Manual de usuario descargar pdf (Pagina 8)

MAX5290–MAX5295

Buffered, Fast-Settling, Dual, 12-/10-/8-Bit,

Voltage-Output DACs

8 _______________________________________________________________________________________

TIMING CHARACTERISTICS—DSP Mode Enabled (3V, 3.3V Logic) (Figure 2) (continued)

(DV

= 2.7V to 3.6V, DGND = 0, T

= T

MIN

to T

MAX

, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

UPIO_ TIMING CHARACTERISTICS

DOUT Tri-State Time when

Exiting DOUTDC0, DOUTDC1, or

DOUTRB UPIO Modes

DOZ

= 20pF, from end of write cycle to UPIO_

in high impedance

100 ns

DOUTRB Tri-State Time from CS

Rise

DRBZ

= 20pF, from rising edge of CS to UPIO_

in high impedance

20 ns

DOUTRB Tri-State Enable Time

from 8th SCLK Fall

ZEN

= 20pF, from 8th falling edge of SCLK to

UPIO_ driven out of tri-state

20 ns

LDAC Pulse-Width Low t

LDL

Figure 5 20 ns

LDAC Effective Delay t

LDS

Figure 6 100 ns

CLR, MID, SET Pulse-Width Low t

CMS

Figure 5 20 ns

GPO Output Settling Time t

Figure 6 100 ns

GPO Output High-Impedance

Time

GPZ

100 ns

TIMING CHARACTERISTICS—DSP Mode Enabled (1.8V Logic) (Figure 2)

(DV

= 1.8V to 3.6V, DGND = 0, T

= T

MIN

to T

MAX

, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SCLK Frequency f

SCLK

1.8V < DV

< 3.6V 10 MHz

SCLK Pulse-Width High t

(Note 7) 40 ns

SCLK Pulse-Width Low t

(Note 7) 40 ns

CS Fall to SCLK Fall Setup Time t

CSS

20 ns

DSP Fall to SCLK Fall Setup Time t

DSS

20 ns

SCLK Fall to CS Rise Hold Time t

CSH

0ns

SCLK Fall to CS Fall Delay t

CS0

10 ns

SCLK Fall to DSP Fall Delay t

DS0

15 ns

DIN to SCLK Fall Setup Time t

20 ns

DIN to SCLK Fall Hold Time t

5ns

SCLK Rise to DOUT_ Valid

Propagation Delay

DO1

= 20pF, UPIO_ = DOUTDC1 or DOUTRB

mode

60 ns

SCLK Fall to DOUTDC0 Valid

Propagation Delay

DO2

= 20pF, UPIO_ = DOUTDC0 mode 60 ns

CS Rise to SCLK Fall Hold Time t

CS1

MICROWIRE and SPI modes 0 and 3 20 ns

CS Pulse-Width High t

CSW

90 ns

DSP Pulse-Width High t

DSW

40 ns

DSP Pulse-Width Low

DSPWL (Note 8)

40 ns

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 32 33

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Rainbow-electronics MAX5295 Manual de usuario Pagina 8

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