LTC2435-1IGN datasheet(5/40 Pages) LINER

5 / 40 page

LTC2435/LTC2435-1

24351fa

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: VCC = 2.7 to 5.5V unless otherwise specified.

VREF = REF+ – REF–, VREFCM = (REF+ + REF–)/2;

VIN = IN+ – IN–, VINCM = (IN+ + IN–)/2.

Note 4: FO pin tied to GND or to VCC or to external conversion clock

source with fEOSC = 153600Hz 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 straight line passing through the actual endpoints of the transfer

curve. The deviation is measured from the center of the quantization

band.

Note 7: FO = 0V (internal oscillator) or fEOSC = 153600Hz ±2%

(external oscillator) for the LTC2435 or fEOSC = 139800Hz ±2% for the

LTC2435-1.

Note 8: FO = VCC (internal oscillator) or fEOSC = 128000Hz ±2%

(external oscillator).

Note 9: 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 fESCK and is expressed in kHz.

Note 10: 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 CLOAD = 20pF.

Note 11: The external oscillator is connected to the FO pin. The external

oscillator frequency, fEOSC, is expressed in kHz.

Note 12: The converter uses the internal oscillator.

FO = 0V or FO = VCC.

Note 13: The output noise includes the contribution of the internal

calibration operations.

Note 14: Refer to Offset Accuracy and Drift in the Applications

Information section.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

fEOSC

External Oscillator Frequency Range

●

2000

kHz

tHEO

External Oscillator High Period

●

0.25

200

µs

tLEO

External Oscillator Low Period

●

0.25

200

µs

tCONV

Conversion Time (LTC2435)

FO = 0V

●

65.6

66.9

68.3

FO = VCC

●

78.7

80.3

81.9

External Oscillator (Note 11)

●

10278/fEOSC (in kHz)

Conversion Time (LTC2435-1)

FO = 0V

●

73.5

External Oscillator (Note 11)

●

10278/fEOSC (in kHz)

fISCK

Internal SCK Frequency

Internal Oscillator (Note 10), LTC2435

19.2

kHz

Internal Oscillator (Note 10), LTC2435-1

17.5

kHz

External Oscillator (Notes 10, 11)

fEOSC/8

kHz

DISCK

Internal SCK Duty Cycle

(Note 10)

●

fESCK

External SCK Frequency Range

(Note 9)

●

2000

kHz

tLESCK

External SCK Low Period

(Note 9)

●

250

tHESCK

External SCK High Period

(Note 9)

●

250

tDOUT_ISCK

Internal SCK 24-Bit Data Output Time

Internal Oscillator (Notes 10, 12), LTC2435

●

1.22

1.25

1.28

Internal Oscillator (Notes 10, 12), LTC2435-1

●

1.34

1.37

1.40

External Oscillator (Notes 10, 11)

●

192/fEOSC (in kHz)

tDOUT_ESCK

External SCK 24-Bit Data Output Time (Note 9)

●

24/fESCK (in kHz)

CS ↓ to SDO Low Z

●

200

CS ↑ to SDO High Z

●

200

CS ↓ to SCK ↓

(Note 10)

●

200

CS ↓ to SCK ↑

(Note 9)

●

tKQMAX

SCK ↓ to SDO Valid

●

220

tKQMIN

SDO Hold After SCK ↓

(Note 5)

●

SCK Set-Up Before CS ↓

●

SCK Hold After CS ↓

●

The

● denotes specifications which apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. (Note 3)

TI I G CHARACTERISTICS

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