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LTC2641/LTC2642

26412f

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Continuous operation above the speciﬁed maximum operating

junction temperature may impair device reliability.

Note 3: LTC2641-16/LTC2642-16 ±1LSB = ±0.0015% = ±15.3ppm of full

scale. LTC2641-14/LTC2642-14 ±1LSB = ±0.006% = ±61ppm of full scale.

LTC2641-12/LTC2642-12 ±1LSB = ±0.024% = ±244ppm of full scale.

ELECTRICAL CHARACTERISTICS The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VDD = 3V or 5V, VREF = 2.5V, CL = 10pF, GND = 0, RL = ∞ unless

otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IIN

Digital Input Current

VIN = GND to VCC

●

±1

μA

CIN

Digital Input Capacitance

(Note 6)

●

310

Hysteresis Voltage

0.15

Power Supply

VDD

Supply Voltage

●

2.7

5.5

IDD

Supply Current, VDD

Digital Inputs = 0V or VDD

●

120

200

μA

Power Dissipation

Digital Inputs = 0V or VDD, VDD = 5V

Digital Inputs = 0V or VDD, VDD = 3V

0.60

0.36

TIMING CHARACTERISTICS The ● denotes the speciﬁcations which apply over the full operating temperature

range, otherwise speciﬁcations are at TA = 25°C. VDD = 3V or 5V, VREF = 2.5V, CL = 10pF, GND = 0, RL = ∞ unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DIN Valid to SCLK Setup Time

●

DIN Valid to SCLK Hold Time

●

0ns

SCLK Pulse Width High

●

9ns

SCLK Pulse Width Low

●

9ns

⎯C⎯S Pulse High Width

●

LSB SCLK High to ⎯C⎯S High

●

8ns

⎯C⎯S Low to SCLK High

●

8ns

⎯C⎯S High to SCLK Positive Edge

●

8ns

⎯C⎯L⎯R Pulse Width Low

●

fSCLK

SCLK Frequency

50% Duty Cycle

●

MHz

VDD High to ⎯C⎯S Low (Power-Up Delay)

μs

Note 4: ROUT tolerance is typically ±20%.

Note 5: Reference input resistance is code dependent. Minimum is at

871Chex (34,588) in unipolar mode and at 671Chex (26, 396) in bipolar

mode.

Note 6: Guaranteed by design and not production tested.

Note 7: Guaranteed by gain error and offset error testing, not production

tested.

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