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LTC2433-1

The

q

denotes specifications which apply over the full operating temperature

range, otherwise specifications are at T

A

= 25掳C. (Note 3)

SYMBOL

f

EOSC

t

HEO

t

LEO

t

CONV

f

ISCK

D

ISCK

f

ESCK

t

LESCK

t

HESCK

t

DOUT_ISCK

t

DOUT_ESCK

t

1

t2

t3

t4

t

KQMAX

t

KQMIN

t

5

t

6

PARAMETER

External Oscillator Frequency Range

External Oscillator High Period

External Oscillator Low Period

Conversion Time

Internal SCK Frequency

Internal SCK Duty Cycle

External SCK Frequency Range

External SCK Low Period

External SCK High Period

Internal SCK 19-Bit Data Output Time

External SCK 19-Bit Data Output Time

CS

鈫?/div>

to SDO Low Z

CS

鈫?/div>

to SDO High Z

CS

鈫?/div>

to SCK

鈫?/div>

CS

鈫?/div>

to SCK

鈫?/div>

SCK

鈫?/div>

to SDO Valid

SDO Hold After SCK

鈫?/div>

SCK Set-Up Before CS

鈫?/div>

SCK Hold After CS

鈫?/div>

(Note 5)

(Note 9)

(Note 8)

F

O

= 0V

External Oscillator (Note 10)

Internal Oscillator (Note 9)

External Oscillator (Notes 9, 10)

(Note 9)

(Note 8)

Internal Oscillator (Notes 9, 11)

External Oscillator (Notes 9, 10)

(Note 8)

q

TI I G CHARACTERISTICS

Note 1:

Absolute Maximum Ratings are those values beyond which the

life of the device may be impaired.

Note 2:

All voltage values are with respect to GND.

Note 3:

V

CC

= 2.7V to 5.5V unless otherwise specified.

V

REF

= REF

+

鈥?REF

鈥?/div>

, V

REFCM

= (REF

+

+ REF

鈥?/div>

)/2; V

IN

= IN

+

鈥?IN

鈥?/div>

,

V

INCM

= (IN

+

+ IN

鈥?/div>

)/2.

Note 4:

F

O

pin tied to GND or to an external conversion clock source

with f

EOSC

= 139,800Hz unless otherwise specified.

Note 5:

Guaranteed by design, not subject to test.

Note 6:

Integral nonlinearity is defined as the deviation of a code from

a precise analog input voltage. Maximum specifications are limited by

the LSB step size (V

REF

/2

16

) and the single shot measurement. Typical

specifications are measured from the center of the quantization band.

Note 7:

F

O

= GND (internal oscillator) or f

EOSC

= 139,800Hz

卤2%

(external oscillator).

Note 8:

The converter is in external SCK mode of operation such that

the SCK pin is used as digital input. The frequency of the clock signal

driving SCK during the data output is f

ESCK

and is expressed in kHz.

UW

CONDITIONS

q

MIN

2.56

0.25

143.8

TYP

MAX

2000

390

UNITS

kHz

碌s

ms

kHz

146.7

149.6

20510/f

EOSC

(in kHz)

17.5

f

EOSC

/8

45

250

1.06

55

2000

%

kHz

ns

1.09

1.11

152/f

EOSC

(in kHz)

19/f

ESCK

(in kHz)

200

220

ms

ns

0

50

15

50

ns

Note 9:

The converter is in internal SCK mode of operation such that

the SCK pin is used as digital output. In this mode of operation the

SCK pin has a total equivalent load capacitance C

LOAD

= 20pF.

Note 10:

The external oscillator is connected to the F

O

pin. The external

oscillator frequency, f

EOSC

, is expressed in kHz.

Note 11:

The converter uses the internal oscillator.

F

O

= 0V.

Note 12:

1.45碌V RMS noise is independent of V

REF

. Since the noise

performance is limited by the quantization, lowering V

REF

improves the

effective resolution.

Note 13:

Guaranteed by design and test correlation.

Note 14:

The low sleep mode current is valid only when CS is high.

Note 15:

These parameters are guaranteed by design over the full

supply and temperature range. Automated testing procedures are

limited by the LSB step size (V

REF

/65,536).

24331fa

5

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