SI4123 SILABS [Silicon Laboratories], SI4123 Datasheet - Page 9

• Manufacturer Part Number: SI4123
• Description: DUAL-BAND RF SYNTHESIZER WITH INTEGRATED VCOS FOR WIRELESS COMMUNICATIONS
• Manufacturer: SILABS [Silicon Laboratories]

Table 5. RF and IF Synthesizer Characteristics (Continued)
(V
Parameter
RF1 Harmonic Suppression
RF2 Harmonic Suppression
IF Harmonic Suppression
RFOUT Power Level
RFOUT Power Level
IFOUT Power Level
RF1 Output Reference Spurs
RF2 Output Reference Spurs
Powerup Request to Synthesizer Ready
Time
Powerdown Request to Synthesizer Off
Time
Notes:
DD
1. f
2. Extended frequency operation only. V
3. From powerup request (PWDN or SEN during a write of 1 to bits PDIB and PDRB in Register 2) to RF and IF
4. From powerdown request (PWDN, or SENduring a write of 0 to bits PDIB and PDRB in Register 2) to supply current
= 2.7 to 3.6 V, T
RFLB pins. See Application Note 41 for more details on the Si4133 extended frequency operation.
synthesizers ready (settled to within 0.1 ppm frequency error).
equal to I

= 200 kHz, RF1 = 1.6 GHz, RF2 = 1.2 GHz, IFOUT = 550 MHz, LPWR = 0, for all parameters unless otherwise noted.
1
PWDN
A
.
= –40 to 85 °C)
2
4
3
DD
Symbol
 3.0 V, QFN only, VCO Tuning Range fixed by directly shorting the RFLA and
t
t
pup
pdn
Rev. 1.61
Z
Extended frequency
L
Second Harmonic
Offset = 400 kHz
Offset = 600 kHz
Offset = 400 kHz
Offset = 600 kHz
Offset = 200 kHz
Offset = 200 kHz
= 50RF1 active,
Test Condition
Figures 4, 5
Figures 4, 5
Z
Z
operation
L
L
= 50
= 50 
Min
–14
—
–8
–8
—
—
—
—
—
—
—
—
—
—
40/f
Typ
–26
–26
–26
–65
–71
–75
–65
–71
–75
–3
–7
–4
—

50/f
Max
–20
–20
–20
100
—
—
—
—
—
—
Si4133
1
1
0

dBm
dBm
dBm
Unit
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
ns
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