Rainbow-electronics MAX5259 Manual do Utilizador descarregar pdf (Página 6)

MAX5258/MAX5259

+3V/+5V, Low-Power, 8-Bit Octal DAC

with Rail-to-Rail Output Buffers

6 _______________________________________________________________________________________

TIMING CHARACTERISTICS (MAX5259)

REF

= +2.5V, GND = 0, C

DOUT

= 100pF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

= +3V and

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Rise-to-CS Fall-Setup Time t

VDCS

5 µs

LDAC Pulse Width Low t

LDAC

40 20 ns

CS Rise-to-LDAC Fall-Setup Time

(Note 4)

CLL

40 ns

CS Pulse Width High t

CSW

90 ns

SCLK Clock Frequency (Note 5) f

CLK

10 MHz

SCLK Pulse Width High t

40 ns

SCLK Pulse Width Low t

40 ns

CS Fall-to-SCLK Rise-Setup Time t

CSS

40 ns

SCLK Rise-to-CS Rise-Hold Time t

CSH

0ns

DIN to SCLK Rise-to-Setup Time t

40 ns

DIN to SCLK Rise-to-Hold Time t

0ns

SCLK Rise-to-DOUT Valid

Propagation Delay (Note 6)

DO1

200 ns

SCLK Fall-to-DOUT Valid

Propagation Delay (Note 7)

DO2

210 ns

CS Rise-to-SCLK Rise-Setup

Time

CS1

40 ns

Note 1: INL and DNL are measured with R

referenced to ground. Nonlinearity is measured from the first code that is greater than or

equal to the maximum offset specification to code FF hex (full scale). (See DAC Linearity and Voltage Offset section.)

Note 2: Output settling time is measured from the 50% point of the rising edge of CS to 1/2LSB of the final value of V

OUT

Note 3: Guaranteed by design, not production tested.

Note 4: If LDAC is activated prior to the rising edge of CS, it must remain low for t

LDAC

or longer after CS goes high.

Note 5: When DOUT is not used. If DOUT is used, f

CLK

(max) is 4MHz due to SCLK to DOUT propagation delay.

Note 6: Serial data is clocked-out at SCLK’s rising edge (measured from 50% of the clock edge to 20% or 80% of V

Note 7: Serial data is clocked-out at SCLK’s falling edge (measured from 50% of the clock edge to 20% or 80% of V

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

MAX5258/MAX5259 1

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