Data Sheet

ADF4401A

Rev. 0 | Page 5 of 39

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

CALIBRATION PLL SPECIFICATIONS

When used as internal PLL for frequency tuning,

PLL and charge pump specifications do not apply

when used as VCO only

REFP and REFN Characteristics

Input Frequency

10

500

MHz

Input Sensitivity

Single-Ended Mode

0.4

V p-p

Differential Mode

0.4

1.8

V p-p

Low voltage differential signal (LVDS) and low

voltage positive emitter coupled logic (LVPECL)

compatible, REFP and REFN biased at 2.1 V, ac

coupling ensures 2.1 V bias

Single-Ended Mode

6.9

pF

Differential Mode

1.4

pF

Input Current

±150

µA

Single-ended reference programmed

300

µA

Differential reference programmed

Phase Detector Frequency

125

MHz

CHARGE PUMP (CALIBRATION ONLY)

Source

High Value

5.6

mA

Low Value

0.35

mA

VCO CHARACTERISTICS

VCO Frequency

4

8

GHz

Fundamental VCO Phase Noise

Performance

VCO noise in open-loop conditions

−117

dBc/Hz

100 kHz offset from 4.0 GHz carrier

−139

dBc/Hz

1 MHz offset from 4.0 GHz carrier

−156

dBc/Hz

10 MHz offset from 4.0 GHz carrier

−162

dBc/Hz

100 MHz offset from 4.0 GHz carrier

−112

dBc/Hz

100 kHz offset from 5.7 GHz carrier

−136

dBc/Hz

1 MHz offset from 5.7 GHz carrier

−153

dBc/Hz

10 MHz offset from 5.7 GHz carrier

−161

dBc/Hz

100 MHz offset from 5.7 GHz carrier

−109

dBc/Hz

100 kHz offset from 8.0 GHz carrier

−133

dBc/Hz

1 MHz offset from 8.0 GHz carrier

−152

dBc/Hz

10 MHz offset from 8.0 GHz carrier

−162

dBc/Hz

100 MHz offset from 8.0 GHz carrier

VTUNE Input Range

1.2

2.75

V

VCO 3 dB Tuning Port Bandwidth

100

MHz

INTEGRATED RMS JITTER (100 Hz to

9

fs

8 GHz output, includes LO_IN and REF_PFD noise

1

RF8N = 6.5 GHz, LO_IN = 6 GHz, and the reference to external PFD (REF_PFD) = 500 MHz. SMA100B is used as both the LO_IN signal and the REF_PFD signal.