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INTEGER MODE IF SYNTHESIZER CHARACTERISTICS

FRACTIONAL MODE IF SYNTHESIZER CHARACTERISTICS

PLL REFERENCE/CLOCK OUTPUT CHARACTERISTICS

PLL REFERENCE OSCILLATOR SPECIFICATIONS

RECOMMENDED CRYSTAL SPECIFICATIONS

TRF2432

SLWS177B – APRIL 2005 – REVISED NOVEMBER 2006

f

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Frequency

With 44 MHz crystal

374

MHz

Settling time

±10kHz of final frequency. From

60

µs

Standby to Idle measured from

enable

Integrated phase error

10 kHz to 10 MHz

0.2

°rms

Spurious suppression

> 3 MHz offset

-70

dBc

f

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Frequency

With 44 MHz crystal

374

MHz

Settling time

±10kHz of final frequency. From

60

µs

Standby to Idle measured from

enable

Integrated phase error

10 kHz to 10 MHz

0.1

°rms

Spurious suppression

0.25 <

∆f < 3 MHz offset

-45-7

∆f

dBc

> 3 MHz offset

-70

dBc

The TRF2432 synthesizers operate from a single 40 or 44 MHz reference. The TRF2432 can generate its own

PLL reference using an internal oscillator or it may also be driven from an external reference. The TRF2432

provides a user selectable, buffered clock output for base-band ASICs.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Reference frequency

40 or 44

MHz

Start-up time

From power on. Depends on Crystal

0.5

ms

characteristics

Degradation to Crystal Reference

From crystal series resonance.

0.25

PPM

Accuracy

Jitter

5

10

ps

External XO drive

Square-wave, must be AC Coupled

0.8

1

2

Equivalent input load

Single ended

500||10

Ω||pF

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

f

Frequency

Series resonant, fundamental or 3rd

40 or 44

MHz

overtone

ESR

Effective series resistance

100

Ω

C

Shunt capacitance

20

pF

Maximum power handling

50

µW

Frequency accuracy

Over Temperature and Process

20

PPM

7

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