LTC6946 datasheet(5/30 Pages) LINER

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LTC6946

6946fa

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TC = 25°C. VREF+ = VREF0+ = VD+ = VRF+ = 3.3V, VCP+ = VVCO+ = 5V unless otherwise

specified (Note 2). All voltages are with respect to GND.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ICC (3.3V)

Sum VREF+, VRF+ Supply Currents

RF Muted, OD[2:0] = 1

RF Enabled, RFO[1:0] =0, OD[2:0] = 1

RF Enabled, RFO[1:0] = 3, OD[2:0] = 1

RF Enabled, RFO[1:0] =3, OD[2:0] = 2

RF Enabled, RFO[1:0] =3, OD[2:0] = 3

RF Enabled, RFO[1:0] =3, OD[2:0] = 4 to 6

PDALL = 1

100

105

110

195

111

117

122

340

μA

Phase Noise and Spurious

Phase Noise (LTC6946-1, fVCO = 3.0GHz,

fRF = 3.0GHz, OD[2 :0] = 1 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–80

–130

–157

dBc/Hz

Phase Noise (LTC6946-2, fVCO = 4.0GHz,

fRF = 4.0GHz, OD[2 :0] = 1 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–77

–127

–156

dBc/Hz

Phase Noise (LTC6946-3, fVCO = 5.0GHz,

fRF = 5.0GHz, OD[2 :0] = 1 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–75

–126

–155

dBc/Hz

Phase Noise (LTC6946-3, fVCO = 5.0GHz,

fRF = 2.50GHz, OD[2 :0] = 2 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–81

–132

–155

dBc/Hz

Phase Noise (LTC6946-3, fVCO = 5.0GHz,

fRF = 1.667GHz, OD[2 :0] = 3 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–84

–135

–156

dBc/Hz

Phase Noise (LTC6946-3, fVCO = 5.0GHz,

fRF = 1.25GHz, OD[2 :0] = 4 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–87

–138

–156

dBc/Hz

Phase Noise (LTC6946-3, fVCO = 5.0GHz,

fRF = 1.00GHz, OD[2 :0] = 5 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–89

–140

–157

dBc/Hz

Phase Noise (LTC6946-3, fVCO = 5.0GHz,

fRF = 0.833GHz, OD[2 :0] = 6 (Note 6))

10kHz Offset

1MHz Offset

40MHz Offset

–90

–141

–158

dBc/Hz

LM(NORM)

Normalized In-Band Phase Noise Floor

ICP = 11.2mA (Notes 7, 8, 9)

–226

dBc/Hz

LM(NORM – 1/f) Normalized In-Band 1/f Phase Noise

ICP = 11.2mA (Notes 7, 10)

–274

dBc/Hz

LM(IB)

In-Band Phase Noise Floor

(Notes 7, 8, 9, 11)

–99

dBc/Hz

Integrated Phase Noise from

100Hz to 40MHz

(Notes 8, 12)

0.17

°RMS

Spurious

fOFFSET = fPFD, PLL Locked (Notes 8, 12, 13)

–103

dBc

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC6946I is guaranteed functional within the case operating

temperature range from –40°C to 105°C (θJC = 7°/W).

Note 3: Valid for 1.60V ≤ TUNE ≤ 2.85V with part calibrated after a power

cycle or software power-on-reset (POR).

Note 4: Based on characterization.

Note 5: For 0.7V ≤ VCP ≤ (VCP+ – 0.7V).

Note 6: Measured outside the loop bandwidth, using a narrowband loop,

RFO[1:0] = 3.

Note 7: Measured inside the loop bandwidth with the loop locked.

Note 8: Reference frequency supplied by Wenzel 501-04608A,

fREF = 10MHz, PREF = 13dBm.

Note 9: Output phase noise floor is calculated from normalized phase

noise floor by LM(OUT) = –226 + 10log10 (fPFD) + 20log10 (fRF/fPFD).

Note 10: Output 1/f phase noise is calculated from normalized 1/f phase

noise by LM(OUT – 1/f) = –274 + 20log10 (fRF) – 10log10 (fOFFSET).

Note 11: ICP = 11.2mA, fPFD = 250kHz, FILT[1:0] = 3, Loop BW = 25kHz;

fRF = 900MHz, fVCO = 2.7GHz (LTC6946-1), fVCO = 3.6GHz (LTC6946-2),

fVCO = 4.5GHz (LTC6946-3).

Note 12: ICP = 11.2mA, fPFD = 1MHz, FILT[1:0] = 3, Loop BW = 40kHz;

fRF = 900MHz, fVCO = 2.7GHz (LTC6946-1), fVCO = 3.6GHz (LTC6946-2),

fVCO = 4.5GHz (LTC6946-3).

Note 13: Measured using DC1705A.

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