Rainbow-electronics MAX5295 Manual de usuario descargar pdf (Pagina 5)

MAX5290–MAX5295

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

Voltage-Output DACs

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(AV

= 2.7V to 3.6V, DV

= 1.8V to AV

, AGND = 0, DGND = 0, V

REF

= 2.5V, R

= 10kΩ, C

= 100pF, T

= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

POWER REQUIREMENTS

Analog Supply Voltage

Range

2.7 3.6 V

Digital Supply Voltage

Range

1.8

Unity gain

0.55

0.8 µA

SLOW mode, all digital inputs

at DGND or DV

, no load,

REF

= 2.5V

Force sense 0.9 1.2 mA

Unity gain

0.85

Operating Supply

Current

AVDD

DVDD

FAST mode, all digital inputs

at DGND or DV

, no load,

REF

= 2.5V

Force sense 1.2 2

Shutdown Supply

Current

AV D D ( S H D N )

D V D D

(

S H D N

)

No clocks, all digital inputs at DGND or DV

, all

DACs in shutdown mode

2.5 µA

TIMING CHARACTERISTICS—DSP Mode Disabled (3V, 3.3V Logic) (Figure 1)

(DV

= 2.7V 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

2.7V < DV

< 3.6V 20 MHz

SCLK Pulse-Width High t

(Note 7) 20 ns

SCLK Pulse-Width Low t

(Note 7) 20 ns

CS Fall to SCLK Rise Setup Time t

CSS

10 ns

SCLK Rise to CS Rise Hold Time t

CSH

5ns

SCLK Rise to CS Fall Setup Time t

CS0

10 ns

DIN to SCLK Rise Setup Time t

12 ns

DIN to SCLK Rise Hold Time t

5ns

SCLK Rise to DOUTDC1 Valid

Propagation Delay

DO1

= 20pF, UPIO_ = DOUTDC1 mode 30 ns

SCLK Fall to DOUT_ Valid

Propagation Delay

DO2

= 20pF, UPIO_ = DOUTDC0 or DOUTRB

mode

30 ns

CS Rise to SCLK Rise Hold Time t

CS1

MICROWIRE and SPI modes 0 and 3 10 ns

CS Pulse-Width High t

CSW

45 ns

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

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Rainbow-electronics MAX5295 Manual de usuario Pagina 5

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