LTC2480CDD datasheet(5/40 Pages) LINER

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LTC2480

2480f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

fEOSC

External Oscillator Frequency Range

(Note 15)

●

4000

kHz

tHEO

External Oscillator High Period

●

0.125

100

µs

tLEO

External Oscillator Low Period

●

0.125

100

µs

tCONV_1

Conversion Time for 1x Speed Mode

50Hz Mode

●

157.2

160.3

163.5

60Hz Mode

●

131.0

133.6

136.3

Simultaneous 50Hz/60Hz Mode

●

144.1

146.9

149.9

External Oscillator

●

41036/fEOSC (in kHz)

tCONV_2

Conversion Time for 2x Speed Mode

50Hz Mode

●

78.7

80.3

81.9

60Hz Mode

●

65.6

66.9

68.2

Simultaneous 50Hz/60Hz Mode

●

72.2

73.6

75.1

External Oscillator

●

20556/fEOSC (in kHz)

fISCK

Internal SCK Frequency

Internal Oscillator (Note 10)

38.4

kHz

External Oscillator (Notes 10, 11)

fEOSC/8

kHz

DISCK

Internal SCK Duty Cycle

(Note 10)

●

fESCK

External SCK Frequency Range

(Note 10)

●

4000

kHz

tLESCK

External SCK Low Period

(Note 10)

●

125

tHESCK

External SCK High Period

(Note 10)

●

125

tDOUT_ISCK

Internal SCK 24-Bit Data Output Time

Internal Oscillator (Notes 10, 12)

●

0.61

0.625

0.64

External Oscillator (Notes 10, 11)

●

192/fEOSC (in kHz)

tDOUT_ESCK

External SCK 24-Bit Data Output Time

(Note 10)

●

24/fESCK (in kHz)

↓ to SDO Low

●

200

↑ to SDO High Z

●

200

↓ to SCK↓

Internal SCK Mode

●

200

↓ to SCK↑

External SCK Mode

●

tKQMAX

SCK

↓ to SDO Valid

●

200

tKQMIN

SDO Hold After SCK

↓

(Note 5)

●

SCK Set-Up Before CS

↓

●

SCK Hold After CS

↓

●

SDI Setup Before SCK

↑

(Note 5)

●

100

SDI Hold After SCK

↑

(Note 5)

●

100

The

● denotes specifications which apply over the full operating temperature

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

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: VCC = 2.7V to 5.5V unless otherwise specified.

VREFCM = VREF/2, FS = 0.5VREF/GAIN

VIN = IN+ – IN–, VIN(CM) = (IN+ + IN–)/2

Note 4: Use internal conversion clock or external conversion clock source

with fEOSC = 307.2kHz 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: 50Hz mode (internal oscillator) or fEOSC = 256kHz ±2% (external

oscillator).

Note 8: 60Hz mode (internal oscillator) or fEOSC = 307.2kHz ±2% (external

oscillator).

Note 9: Simultaneous 50Hz/60Hz mode (internal oscillator) or fEOSC =

280kHz

±2% (external oscillator).

Note 10: The SCK can be configured in external SCK mode or internal SCK

mode. In external SCK mode, the SCK pin is used as digital input and the

driving clock is fESCK. In internal SCK mode, the SCK pin is used as digital

output and the output clock signal during the data output is fISCK.

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.

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

calibration operations.

Note 14: Guaranteed by design and test correlation.

Note 15: Refer to Applications Information section for performance vs

data rate graphs.

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