ADC12130 datasheet(8/42 Pages) NSC

8 / 42 page

AC Electrical Characteristics

The following specifications apply for (V

+ =V

A+=VD+ = +5V, VREF+ = +4.096V, and fully-differential input with fixed 2.048V

common-mode voltage) or (V

+ =V

A+=VD+ = +3.3V, VREF+ = +2.5V and fully-differential input with fixed 1.250V common-

mode voltage), V

REF− = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, VREF− and VREF+

≤ 25Ω,f

SK = 5 MHz, and 10 (tCK) acquisition time unless otherwise specified. Boldface limits apply for TA =TJ =TMIN to TMAX; all

other limits T

A =TJ = 25˚C. (Note 17)

Symbol

Parameter

Conditions

Typical

(Note 10)

Limits (Note 11)

Units (Limits)

Conversion Clock (CCLK) Frequency

MHz (max)

MHz (min)

Serial Data Clock SCLK Frequency

MHz (max)

Hz (min)

Conversion Clock Duty Cycle

% (min)

% (max)

Serial Data Clock Duty Cycle

% (min)

% (max)

Conversion Time

12-Bit + Sign or 12-Bit

44(t

CK)

44(t

CK)

(max)

8.8

µs (max)

Acquisition Time (Note 19)

6 Cycles Programmed

6(t

CK)

6(t

CK)

(min)

7(t

CK)

(max)

1.2

µs (min)

1.4

µs (max)

10 Cycles Programmed

10(t

CK)

10(t

CK)

(min)

11(t

CK)

(max)

2.0

µs (min)

2.2

µs (max)

18 Cycles Programmed

18(t

CK)

18(t

CK)

(min)

19(t

CK)

(max)

3.6

µs (min)

3.8

µs (max)

34 Cycles Programmed

34(t

CK)

34(t

CK)

(min)

35(t

CK)

(max)

6.8

µs (min)

7.0

µs (max)

CAL

Self-Calibration Time

4944(t

CK)

4944(t

CK)

(max)

988.8

µs (max)

Auto-Zero Time

76(t

CK)

76(t

CK)

(max)

15.2

µs (max)

SYNC

Self-Calibration or Auto-Zero

Synchronization Time from DOR

2(t

CK)

2(t

CK)

(min)

3(t

CK)

(max)

0.40

µs (min)

0.60

µs (max)

DOR

DOR High Time when CS is Low

Continuously for Read Data and

Software Power Up/Down

9(t

SK)

9(t

SK)

(max)

1.8

µs (max)

CONV

CONV Valid Data Time

8(t

SK)

8(t

SK)

(max)

1.6

µs (max)

ADC12130 Datasheet(PDF) 8 Page - National Semiconductor (TI)

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