ADC10321 datasheet(6/16 Pages) NSC

Il numero della parte	ADC10321

Spiegazioni elettronici	10-Bit, 20MSPS, 98mW A/D Converter with Internal Sample and Hold

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Produttore elettronici	NSC [National Semiconductor (TI)]

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Converter Electrical Characteristics (Continued)

The following specifications apply for V

A = +5.0VDC,VD = 5.0VDC,VD I/O = 5.0VDC,VREF+ = +3.5VDC,VREF− = +1.5VDC,

C

L = 20pF, fCLK = 20MHz, RS = 25Ω. Boldface limits apply for TA = TMIN to TMAX: all other limits TA = 25˚C(Note 7)

Symbol

Parameter

Conditions

Typical

(Note 8)

Limits

(Note 9)

Units

Reference and Analog Input Characteristics

R

REF

Reference Ladder

Resistance

1000

850

1150

Ω(min)

Ω(max)

V

REF+

Positive Reference Voltage

3.5

4.0

V(max)

V

REF−

Negative Reference

Voltage

1.5

1.3

V(min)

(V

REF+) −

(V

REF −)

Total Reference Voltage

2.0

1.0

2.7

V(min)

V(max)

DC and Logic Electrical Characteristics

The following specifications apply for V

A = +5.0VDC,VD = +5.0VDC,VD I/O = 5.0VDC,VREF+ = +3.5VDC,VREF− = +1.5VDC,

C

L = 20 pF, fCLK = 20MHz, RS = 25Ω. Boldface limits apply for TA = TMIN to TMAX: all other limits TA = 25˚C(Note 7)

Symbol

Parameter

Conditions

Typical

(Note 8)

Limits

(Note 9)

Units

CLK, OE, PD, Digital Input Characteristics

V

IH

Logical

″1″ Input Voltage

V

D = 5.5V

2.0

V(min)

V

IL

Logical

″0″ Input Voltage

V

D = 4.5V

1.0

V(max)

I

IH

Logical

″1″ Input Current

V

IH = VD

10

µA

I

IL

Logical

″0″ Input Current

V

IL = DGND

−10

µA

D00 - D13 Digital Output Characteristics

V

OH

Logical

″1″ Output

Voltage

V

D I/O = + 4.5V, IOUT = −0.5mA

V

D I/O = + 2.7V, IOUT = −0.5mA

4.0

2.4

V(min)

V

OL

Logical

″0″ Output

Voltage

V

D I/O = + 4.5V, IOUT = −1.6mA

V

D I/O = + 2.7V, IOUT = −1.6mA

0.4

V(max)

I

OZ

TRI-STATE Output

Current

V

OUT = DGND

V

OUT = VD

−10

10

µA

I

OS

Output Short Circuit

Current

V

D I/O = 3V

±12

mA

V

D I/O = 5V

±25

mA

Power Supply Characteristics

I

A

Analog Supply Current

PD = LOW, Ref not included

PD = HIGH, Ref not included

14.5

0.5

16

mA(max)

I

D +

I

DI/O

Digital Supply Current

PD = LOW, Ref not included

PD = HIGH, Ref not included

5

0.2

6

mA(max)

P

D

Power Consumption

98

110

mW (max)

AC Electrical Characteristics

The following specifications apply for V

A = +5.0VDC,VD I/O = 5.0VDC,VREF+ = +3.5VDC,VREF− = +1.5VDC,fCLK = 20MHz,

t

rc = tfc = 5ns, RS = 25Ω.CL (data bus loading) = 20 pF, Boldface limits apply for TA = TMIN to TMAX: all other limits TA =

25˚C(Note 7)

Symbol

Parameter

Conditions

Typical

(Note 8)

Limits

(Note 9)

Units

(Limits)

f

CLK1

Maximum Clock Frequency

25

20

MHz(min)

f

CLK2

Minimum Clock Frequency

1

MHz(max)

t

CH

Clock High Time

23

ns(min

t

CL

Clock Low Time

23

ns(min)

Duty Cycle

50

45

55

%(min)

%(max)

Pipeliine Delay (Latency)

2.0

Clock Cycles

t

rc,tfc

Clock Input Rise and Fall Time

5

ns(max)

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