Rainbow-electronics ADC08832 Manual de usuario descargar pdf (Pagina 4)

Electrical Characteristics (Continued)

The following specifications apply for V

CC

=

V

REF

=

+5V

DC

, and f

CLK

=

2 MHz unless otherwise specified. Boldface limits

apply for T

A

=

T

J

=

T

MIN

to T

MAX

; all other limits T

A

=

T

J

=

25˚C.

Symbol Parameter Conditions Typical

(Note 8)

Limits

(Note 9)

Units

(Limits)

DC CHARACTERISTICS

I

CC

Supply Current ADC08831

CLK

=

high

CS

=

V

CC

0.6 1.0 mA (max)

CS

=

LOW

1.7 2.4 mA (max)

I

CC

Supply Current ADC08832

CLK

=

high (Note 16)

CS

=

V

CC

1.3 1.8 mA (max)

CS

=

LOW

2.4 3.5 mA (max)

Electrical Characteristics

The following specifications apply for V

CC

=

V

REF

=

+5 V

DC

, and t

r

=

t

f

=

20 ns unless otherwise specified. Boldface limits

apply for T

A

=

T

J

=

T

MIN

to T

MAX

; all other limits T

A

=

T

J

=

25˚C.

Symbol Parameter Conditions Typical

(Note 8)

Limits

(Note 9)

Units

(Limits)

f

CLK

Clock Frequency 2 MHz (max)

Clock Duty Cycle

(Note 14)

40

60

%

(min)

%

(max)

T

C

Conversion Time (Not Including MUX

Addressing Time)

f

CLK

=

2MHz 8

4

1/f

CLK

(max)

µs (max)

t

CA

Acquisition Time

1

⁄

2

1/f

CLK

(max)

t

SET-UP

CS Falling Edge or Data Input

Valid to CLK Rising Edge

25 ns (min)

t

HOLD

Data Input Valid after CLK

Rising Edge

20 ns (min)

t

pd1

,t

pd0

CLK Falling Edge to Output

Data Valid (Note 15)

C

L

=

100 pF:

Data MSB First

Data LSB First

250

200

ns (max)

ns (max)

t

1H

,t

0H

TRI-STATE Delay from Rising Edge

of CS to Data Output and SARS Hi-Z

C

L

=

10 pF, R

L

=

10 kΩ

(see TRI-STATE Test Circuits)

50 ns

C

L

=

100 pF, R

L

=

2kΩ 180 ns (max)

C

IN

Capacitance of Analog input (Note 17) 13 pF

C

IN

Capacitance of Logic Inputs 5 pF

C

OUT

Capacitance of Logic Outputs 5 pF

www.national.com 4

1 2 3 4 5 6 7 8 9 ... 23 24

Comentarios a estos manuales

Sin comentarios