LMH0366

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SNAS585D – APRIL 2012 – REVISED APRIL 2013

AC Electrical Characteristics (continued)

Over recommended supply voltage and operating temperature ranges, unless otherwise specified.

(1) (2)

Symbol

Parameter

Conditions

Reference

Min

Typ

Max

Units

tLOCK

Asynchronous Lock Time

(7)

25

ms

tSYNLOCK Synchronous Lock Time

(8)

1

ms

tR, tF

Output Rise/Fall Time

20% – 80%, 100

Ω load

SDO0, SDO1

80

130

ps

(3)

(7)

Time to acquire lock when an input signal is first applied or when the data rate of the input signal is changed. The maximum

asynchronous lock time can be improved (decreased) to be less than 15 ms with the following SPI register setting: write 0xA3 to register

0x0E.

(8)

Time to reacquire lock after the switch to another input signal at the same data rate as the PLL is currently locked.

AC Electrical Characteristics – SPI

Over recommended supply voltage and operating temperature ranges, unless otherwise specified.

(1) (2)

Symbol

Parameter

Conditions

Reference

Min

Typ

Max

Units

Recommended Input Timing Requirements

fSCK

SCK Frequency

SCK

20

MHz

tPH

SCK Pulse Width High

Figure 4, Figure 5

% SCK

40

period

tPL

SCK Pulse Width Low

% SCK

40

period

tSU

MOSI Setup Time

Figure 4, Figure 5

MOSI

4

ns

tH

MOSI Hold Time

4

ns

tSSSU

SS Setup Time

Figure 4, Figure 5

SS

14

ns

tSSH

SS Hold Time

4

ns

tSSOF

SS Off Time

1

SCK

period

Switching Characteristics

tODZ

MISO Driven-to-Tristate Time

Figure 5

MISO

20

ns

tOZD

MISO Tristate-to-Driven Time

10

ns

tOD

MISO Output Delay Time

15

ns

(1)

The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as

otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and

are not ensured.

(2)

Typical values represent most likely parametric norms at VCC = +2.5V, TA = +25°C, and at the Recommended Operating Conditions at

the time of product characterization and are not ensured.

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