Rainbow-electronics ADC12191 Manual do Utilizador descarregar pdf (Página 6)

DC and Logic Electrical Characteristics

The following specifications apply for AGND = DGND = DGND I/O = 0V, V

I/O = +5V, PD = +5V, V

REF

= +2.0V,

CLK

= 10 MHz, C

= 50 pF/pin. After Auto-Cal at Temperature. Boldface limits apply for T

MIN

to T

MAX

; all other limits

= 25˚C (Note 7) (Note 8) and (Note 9)

Symbol Parameter Conditions

Typical

(Note

10)

Limits

(Note

11)

Units

(Limits)

CLK, OE Digital Input Characteristics

Logical “1” Input Voltage V+ = 5.25V 2.0 V(min)

Logical “0” Input Voltage V+ = 4.75V 0.8 V(min)

Logical “1” Input Current V

= 5.0V 5 µA

Logical “0” Input Current V

=0V −5 µA

Input Capacitance 8 pF

D0 - D11 Digital Output Characteristics

Logical “1” Output Voltage I

OUT

= −1mA 4 V (min)

Logical “0” Output Voltage I

OUT

= 1.6mA 0.4 V (max)

TRI-STATE

Output Current V

OUT

=3Vor5V 10 µA

OUT

= 0V −10 µA

Output Short Circuit Source

Current

VDDO= 3V, V

OUT

= 0V −14

mA(min)

−I

Output Short Circuit Sink Current VDDO= 3V, V

OUT

16 mA(min)

Power Supply Characteristics

Analog Supply Current

PD = VDDO

PD = DGND

2.5

mA(max)

Digital Supply Current

PD = VDDO

PD = DGND

0.5

mA(max)

Total Power Consumption

PD = VDDO

PD = DGND

235

290

mW(max)

AC Electrical Characteristics

The following specifications apply for AGND = DGND = DGND I/O = 0V, V

I/O = +5V, PD = +5V, V

REF

= +2.0V,

CLK

= 10 MHz, C

= 50 pF/pin. After Auto-Cal at Temperature. Boldface limits apply for T

MIN

to T

MAX

; all other limits

= 25˚C (Note 7) (Note 8) and (Note 10)

Symbol Parameter Conditions

Typical

(Note

10)

Limits

(Note

11)

Units

(Limits)

CLK

Clock Frequency

1 MHz(min)

10 MHz(max)

Clock Duty Cycle 50 %

CONV

Conversion Latency 10

Clock

Cycles

Data output delay after rising clk

edge

I/O=3V 44

I/O=5V 40

DIS

Data outputs into Tristate mode 21 nA (max)

Data outputs active after Tristate 21 ns (max)

WCAL

Calibration request pulse width 3 Tclk(min)

RDYC

Ready Low after CAL request 3 Tclk

CAL

Calibration cycle 4000 Tclk

WPD

Power-down pulse width 3 Tclk(min)

RDYPD

Ready Low after PD request 3 Tclk

Power down mode exit cycle 4000 Tclk

ADC12191

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