3

LTC1655

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Digital I/O

Digital Input High Voltage

q

2.4

V

Digital Input Low Voltage

q

0.8

V

Digital Output High Voltage

q

V

Digital Output Low Voltage

q

0.4

V

Digital Input Leakage

q

±10

µA

Digital Input Capacitance

(Note 6)

10

pF

Switching

q

40

ns

q

0ns

CLK High Time

q

40

ns

CLK Low Time

q

40

ns

CS/LD Pulse Width

q

50

ns

LSB CLK to CS/LD

q

40

ns

CS/LD Low to CLK

q

20

ns

q

0

120

ns

CLK Low to CS/LD Low

q

20

ns

Reference Output

Reference Output Voltage

q

2.036

2.048

2.060

V

Reference Input Range

(Notes 5, 6)

2.2

V

Reference Output Tempco

5

ppm/

°C

Reference Input Resistance

REF Overdriven to 2.2V

q

8.5

13

k

Ω

Reference Short-Circuit Current

q

40

100

mA

Reference Output Line Regulation

q

±1.5

mV/V

Reference Load Regulation

q

0.5

mV

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

of a device may be impaired.

Note 2: Nonlinearity is defined from code 128 to code 65535 (full scale).

See Applications Information.

Note 3: DAC switched between all 1s and code 400.

Note 5: Reference can be overdriven (see Applications Information).

Note 6: Guaranteed by design. Not subject to test.