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LTC1863L/LTC1867L

1863L7Lf

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VDD

Supply Voltage

(Note 9)

2.7

3.6

IDD

Supply Current

fSAMPLE = 175ksps, Internal REF

●

0.75

NAP Mode

170

µA

SLEEP Mode

●

0.2

µA

PDISS

Power Dissipation

fSAMPLE = 175ksps

●

2.7

TI I G CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. (Note 5)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

fSAMPLE

Maximum Sampling Frequency

●

175

kHz

tCONV

Conversion Time

●

3.2

3.7

µs

tACQ

Acquisition Time

●

2.01

1.68

µs

fSCK

SCK Frequency

MHz

CS/CONV High Time

Short CS/CONV Pulse Mode

●

100

SDO Valid After SCK↓

CL = 25pF (Note 11)

●

SDO Valid Hold Time After SCK↓

CL = 25pF

●

517

SDO Valid After CS/CONV↓

CL = 25pF

●

SDI Setup Time Before SCK↑

●

–6

SDI Hold Time After SCK↑

●

SLEEP Mode Wake-Up Time

CREFCOMP = 10µF, CVREF = 2.2µF80

Bus Relinquish Time After CS/CONV↑

CL = 25pF

●

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: All voltage values are with respect to GND (unless otherwise

noted).

Note 3: When these pin voltages are taken below GND or above VDD, they

will be clamped by internal diodes. This product can handle input currents

of greater than 100mA without latchup.

Note 4: When these pin voltages are taken below GND, they will be

clamped by internal diodes. This product can handle input currents of

greater than 100mA below GND without latchup. These pins are not

clamped to VDD.

Note 5: VDD = 2.7V, fSAMPLE = 175ksps and fSCK = 20MHz at 25°C,

tr = tf = 5ns and VIN– = 1.25V for bipolar mode unless otherwise specified.

Note 6: Linearity, offset and gain error specifications apply for both

unipolar and bipolar modes. The INL and DNL are tested in bipolar mode.

Note 7: 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 8: Unipolar offset is the offset voltage measured from +1/2LSB

when the output code flickers between 0000 0000 0000 0000 and

0000 0000 0000 0001 for LTC1867L and between 0000 0000 0000 and

0000 0000 0001 for LTC1863L. Bipolar offset is the offset voltage

measured from –1/2LSB when output code flickers between 0000 0000

0000 0000 and 1111 1111 1111 1111 for LTC1867L, and between

0000 0000 0000 and 1111 1111 1111 for LTC1863L.

Note 9: Recommended operating conditions. The input range of ±1.25V

for bipolar mode is measured with respect to VIN

– = 1.25V. For unipolar

mode, common mode input range is 0V to VDD for the positive input and

0V to 1.5V for the negative input. For bipolar mode, common mode input

range is 0V to VDD for both positive and negative inputs.

Note 10: Guaranteed by design, not subject to test.

Note 11: t2 of 47ns maximum allows fSCK up to 10MHz for rising capture

with 50% duty cycle and fSCK up to 20MHz for falling capture (with 3ns

setup time for the receiving logic).

POWER REQUIRE E TS The ● denotes the specifications which apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. (Note 5)

LTC1863L/LTC1867L/LTC1867LA

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