Rainbow-electronics ADC1251 Manual do Utilizador descarregar pdf (Página 2)

Absolute Maximum Ratings (Notes1&2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

Supply Voltage (V

) 6.5V

Negative Supply Voltage (V

)

6.5V

Voltage at Logic Control Inputs

0.3V to (V

0.3V)

Voltage at Analog Inputs

REF

)(V

0.3V) to (V

0.3V)

-DV

(Note 7) 0.3V

Input Current at any Pin (Note 3)

5mA

Package Input Current (Note 3)

20 mA

Power Dissipation at 25

C (Note 4) 875 mW

Storage Temperature Range

Cto

150

ESD Susceptability (Note 5) 2000V

Soldering Information

J Package (10 Seconds) 300

Operating Ratings (Notes1&2)

Temperature Range T

MIN

MAX

ADC12451CIJ

ADC12451CMJ,

ADC12451CMJ/883

125

and AV

Voltage

(Notes6&7) 4.5V to 5.5V

Negative Supply Voltage (V

)

4.5V to

5.5V

Reference Voltage

REF

, Notes6&7) 3.5V to AV

50 mV

Converter Electrical Characteristics

The following specifications apply for V

5.0V, V

REF

5.0V, using S/H input for

conversion control, and f

CLK

3.5 MHz unless otherwise specified. Boldface limits apply for T

MIN

to T

MAX

; all

other limits T

C. (Notes 6, 7 and 8)

Symbol Parameter Conditions

Typical Limit Units

(Note 9) (Note 10, 19) (Limit)

STATIC CHARACTERISTICS

Positive Integral Linearity Error After Auto-Cal, (Notes 11 & 12)

(/2 LSB

Negative Integral Linearity Error After Auto-Cal, (Notes 11 & 12)

(/2 LSB

Positive or Negative Differential Linearity After Auto-Cal (Notes 11 & 12) 12 Bits

Zero Error (Notes 12 & 13) AZ

‘‘0’’, f

CLK

1.75 MHz

1 LSB

After Auto-Cal Only

3.0 LSB(max)

Positive Full-Scale Error (Note 12) AZ

‘‘0’’, f

CLK

1.75 MHz

1 LSB

Auto-Cal Only

1.5/

2.5 LSB(max)

Negative Full-Scale Error (Note 12) AZ

‘‘0’’, f

CLK

1.75 MHz

1 LSB

Auto-Cal Only

1.5/

3.0 LSB(max)

Analog Input Voltage V

0.05 V(min)

0.05 V(max)

Power Supply Sensitivity Zero Error (Note 14) AV

5%,

(/8 LSB

Full-Scale Error

REF

4.75V, V

(/8 LSB

Linearity Error

(/8 LSB

REF

Input Capacitance 80 pF

Analog Input Capacitance 65 pF

DYNAMIC CHARACTERISTICS

Bipolar Effective Bits (Note 17) f

1 kHz, V

4.85V 12.6 Bits

20.67 kHz, V

4.85V 12.6 11.9 Bits(min)

Unipolar Effective Bits (Note 17) f

1 kHz, V

4.85 V

p-p

11.8 Bits

20.67 kHz, V

4.85 V

p-p

11.8 11.1 Bits(min)

S/N Bipolar Signal to Noise Ratio (Note 17) f

1 kHz, V

4.85V 78 dB

10 kHz, V

4.85V 78 dB

20.67 kHz, V

4.85V 78 73.5 dB(min)

1 2 3 4 5 6 7 ... 17 18

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