Rainbow-electronics ADC12040 Manual do Utilizador descarregar pdf (Página 6)

Converter Electrical Characteristics (Continued)

Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, V

= +5V, V

+3.0V, PD = 0V, V

REF

= +2.0V, f

CLK

= 40 MHz, t

= 3 ns, C

= 20 pF/pin. Boldface limits apply for T

MIN

MAX

: all other limits T

= 25˚C (Notes 7, 8, 9)

Symbol Parameter Conditions

Typical

(Note 10)

Limits

(Note 10)

Units

(Limits)

REFERENCE AND ANALOG INPUT CHARACTERISTICS

Common Mode Input Voltage V

/2 V

Input Capacitance (each pin to

GND)

= 2.5 Vdc

+ 0.7 V

rms

(CLK LOW) 8 pF

(CLK HIGH) 7 pF

REF

Reference Voltage (Note 13) 2.00

1.0 V (min)

2.2 V (max)

Reference Input Resistance 100 MΩ (min)

DC and Logic Electrical Characteristics

Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, V

= +5V, V

+3.0V, PD = 0V, V

REF

= +2.0V, f

CLK

= 40 MHz, t

= 3 ns, C

= 20 pF/pin. Boldface limits apply for T

MIN

MAX

: all other limits T

= 25˚C (Notes 7, 8, 9)

Symbol Parameter Conditions

Typical

(Note 10)

Limits

(Note 10)

Units

(Limits)

CLK, PD, OE DIGITAL INPUT CHARACTERISTICS

IN(1)

Logical “1” Input Voltage V

= 5.25V 2.0 V (min)

IN(0)

Logical “0” Input Voltage V

= 4.75V 1.0 V (max)

IN(1)

Logical “1” Input Current V

= 5.0V 10 µA

IN(0)

Logical “0” Input Current V

= 0V −10 µA

Digital Input Capacitance 5 pF

D0–D11 DIGITAL OUTPUT CHARACTERISTICS

OUT(1)

Logical “1” Output Voltage I

OUT

= −0.5 mA

= 2.5V 2.3 V (min)

=3V 2.7 V (min)

OUT(0)

Logical “0” Output Voltage I

OUT

= 1.6 mA, V

=3V 0.4 V (max)

TRI-STATE Output Current

OUT

= 2.5V or 5V 100 nA

OUT

= 0V −100 nA

Output Short Circuit Source

Current

OUT

= 0V −20 mA (min)

−I

Output Short Circuit Sink Current V

OUT

20 mA (min)

POWER SUPPLY CHARACTERISTICS

Analog Supply Current

PD Pin = DGND, V

REF

= 2.0V

PD Pin = V

66 mA (max)

Digital Supply Current

PD Pin = DGND

PD Pin = V

CLK

7.3 mA (max)

Digital Output Supply Current

PD Pin = DGND, C

= 0 pF (Note 14)

PD Pin = V

CLK

mA (max)

Total Power Consumption

PD Pin = DGND, C

= 0 pF (Note 15)

PD Pin = V

CLK

340

366 mW

PSRR1 Power Supply Rejection

Rejection of Full-Scale Error with

= 4.75V vs. 5.25V

58 dB

PSRR2 Power Supply Rejection

SNR Degradation w/10 MHz,

200 mV

P-P

riding on V

50 dB

ADC12040

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