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TRF1121
www.ti.com
SYNTHESIZER #1 (UHF-BAND PLL) CHARACTERISTICS
TRF1221
SLWS170B – APRIL 2005 – REVISED JANUARY 2008
f Ref
PARAMETER
Reference frequency
TEST CONDITIONS
MIN
TYP MAX
18
UNIT
MHz
f VCO1
φ nFRVCO1
φ nLD
LO1
φ nLD
LO1
Frequency
Free-running VO1 SSB phase noise at 100 kHz
Locked synthesizer-1 SSB phase noise at 10 kHz
Locked synthesizer-1 SSB phase noise at 100 kHz
TRF1121 and TRF1221
250
–115
–115
–115
350
MHz
dBc/Hz
dBc/Hz
dBc/Hz
f LD
LO1
Locked synthesizer-1 integrated RMS phase noise
100 Hz to 1 MHz
0.2
°
MS LO1
Δ f LO1
R RS
LO1
R FS
LO1
Tuning sensitivity
Step size
Reference spur rejection
Fractional spurs rejection
For V LO1TUN > 2 V
TRF1121, 18-MHz reference input
TRF1221, 18-MHz reference input
30
50
62.5
–70
–60
60
MHz/V
kHz
dBc
dBc
SYNTHESIZER #2 (S-BAND PLL) CHARACTERISTICS
f Ref
PARAMETER
Reference frequency
TEST CONDITIONS
MIN
TYP
18
MAX
UNIT
MHz
f LO2A
f LO2B
MS LO2A
MS LO2B
Δ f LO2
P LO2
Output frequency, VCO2A
Output frequency, VCO2B
Tuning sensitivity, VCO2A
Tuning sensitivity, VCO2B
Step size
Output power level
TRF1121
TRF1221
TRF1121
TRF1221
TRF1121 For VLO1TUN >2 V
TRF1221 For VLO1TUN >2 V
TRF1121 For VLO1TUN >2 V
TRF1221 For VLO1TUN >2 V
For 18-MHz reference input
Measured into a 100- ? differential load at the
LO1OP/N port
1500
1700
1700
2400
150
200
200
350
1
–3
2100
2450
2500
3600
350
400
400
550
MHz
MHz
MHz/V
MHz/V
MHz
dBm
φ nFR
VCO2
Free-running SSB phase noise at 100 kHz
Measured into a 100- ? differential load at the
LO1OP/N port
–100
dBc/Hz
φ nLD
LO2
Locked synthesizer SSB phase noise
at 10 kHz
Locked synthesizer SSB phase noise at
100 kHz
Measured into a 100- ? differential load at the
LO2OP/N port with loop filter set to 400 kHz
nominal
–102
–100
–97
–95
dBc/Hz
φ LD LO2
Integrated RMS phase noise
Locked, 100 Hz to 1 MHz
0.5
1
°
Measured into a 100- ? differential load at the
R RS
LO2
Reference sideband suppression
LO1OP/N port. PLL loop bandwidth ~400
–65
–60
dBc
kHz
At 1 MHz offset (Loop BW ~400 kHz)
–50
–45
R FS
LO2
Fractional spur suppression
At 2 MHz offset (Loop BW ~400 kHz)
–65
–60
dBc
All others
–70
–70
R H
LO2
Harmonics suppression
Measured into a 100- ? differential load at the
LO1OP/N port
–20
dBc
RL LO2
P extVCO
RL extVCO
Output return loss
Ext VCO input power
Ext VCO port input return loss
Measured into a 100- ? differential load at the
LO1OP/N port
Differential mode
–11
–10
–16
–13
–15
dB
dBm
dB
Z in extVCO Ext VCO port input impedance
Copyright ? 2005–2008, Texas Instruments Incorporated
Differential mode
100
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