Guaranteed performance across worst-case supply voltage and temperature range, unless otherwise specified.

Guaranteed performance across worst-case supply voltage and temperature range, unless otherwise specified.

Guaranteed performance across worst-case supply voltage and temperature range unless otherwise specified.

Note 15: Selecting an external reference clock frequency other than 20MHz requires programming the SC1894 through the SPI bus.

See SPI Programming Guide and HW Design Guide for more information.

Note 16: User may program the SC1894 to accept the following clock frequencies: 10, 13, 15.36, 19.2, 20, 26 and 30.72MHz.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

User Programmable External

Clock (Notes 15, 16)

10

20

30.72

MHz

External Clock Frequency

Accuracy

1

%

External Clock Frequency Drift

Including aging and temperature

100

ppm

Duty Cycle

Square wave

45

55

%

External Clock Amplitude

Sine or square wave

500

1500

External Clock Phase Noise

At 100kHz offset

-130

dBc/Hz

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ESR

50

Ω

Capacitive Load to Ground

10

12

pF

Frequency Accuracy

250

ppm

Frequency Drift

Including aging and temperature

100

ppm

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Select Setup Time

100

ns

Select Hold Time

250

ns

Select Disable Time

100

ns

Data Setup Time

25

ns

Data Hold Time

45

ns

Rise Time

25

ns

Fall Time

25

ns

Clock Period

250

ns

Clock High Time

100

ns

Time to Output Valid

100

ns

Output Data Disable

0

ns

SC1894

225MHz to 3800MHz RF Power

Amplifier Linearizer (RFPAL)

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Maxim Integrated │ 7

Digital I/O—External Clock (XTALI)

Crystal Requirements

Serial Peripheral Interface (SPI) Bus Specifications