4

LTC1864/LTC1865

sn18645 18645fs

LTC1864/LTC1865

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage

4.75

5.25

V

Clock Frequency

●

DC

20

MHz

Total Cycle Time

µs

Analog Input Sampling Time

LTC1864

16

SCK

LTC1865

14

SCK

Setup Time CONV↓ Before First SCK↑

30

ns

(See Figure 1)

Hold Time SDI After SCK↑

LTC1865

15

ns

Setup Time SDI Stable Before SCK↑

LTC1865

15

ns

SCK High Time

40%

SCK Low Time

40%

CONV High Time Between Data

µs

Transfer Cycles

CONV Low Time During Data Transfer

16

SCK

Hold Time CONV Low After Last SCK↑

13

ns

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.

Note 3: Integral nonlinearity is defined as 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 4: Channel leakage current is measured while the part is in sample

mode.

The

LTC1864/LTC1865

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Conversion Time (See Figure 1)

●

2.75

3.2

µs

●

250

kHz

Delay Time, SCK↓ to SDO Data Valid

15

20

ns

●

25

ns

Delay Time, CONV↑ to SDO Hi-Z

●

30

60

ns

Delay Time, CONV↓ to SDO Enabled

●

30

60

ns

Time Output Data Remains

●

510

ns

Valid After SCK↓

SDO Rise Time

8

ns

SDO Fall Time

4

ns

The

Conditions, unless otherwise noted.

RECO

E DED OPERATI G CO DITIO S

TI I G CHARACTERISTICS