LTC6946 datasheet(6/30 Pages) LINER

6 / 30 page

LTC6946

6946fa

TYPICAL PERFORMANCE CHARACTERISTICS

Charge Pump Sink Current Error

vs Voltage, Output Current

Charge Pump Source Current

Error vs Voltage, Temperature

Charge Pump Sink Current Error

vs Voltage, Temperature

RF Output Power vs Frequency

(Single Ended on RF–)

Charge Pump Source Current

Error vs Voltage, Output Current

RF Output HD2 vs Output Divide

(Single Ended on RF–)

REF Input Sensitivity

vs Frequency

REF0 Output Power vs Frequency

TC = 25°C, VREF+ = VREFO+ = VD+ = VRF+ = 3.3V, VCP+ = VVCO+ = 5V, RFO[1:0] = 3,unless otherwise noted.

REFO Phase Noise

FREQUENCY (MHz)

–15

–20

–25

–30

–35

–40

–45

–50

–55

200

6946 G01

100

150

250

175

125

225

BST = 1

FILT = 0

105°C

25°C

–40°C

FREQUENCY (MHz)

–1

–2

–3

–4

200

6946 G02

100

150

250

175

125

225

105°C

25°C

–40°C

OFFSET FREQUENCY (Hz)

–155

–150

–145

–140

100

10k

100k

6946 G03

–160

POUT = 1.45dBm

fREF = 10MHz

BST = 1

FILT = 3

NOTE 8

OUTPUT VOLTAGE (V)

6946 G04

–1

–3

–2

–4

–5

0.5

1.5

3.5

4.5

2.5

250μA

1mA

11.2mA

OUTPUT VOLTAGE (V)

6946 G05

–1

–3

–2

–4

–5

0.5

1.5

3.5

4.5

2.5

–40°C

25°C

105°C

ICP = 11.2mA

OUTPUT VOLTAGE (V)

6946 G06

–1

–3

–2

–4

–5

0.5

1.5

3.5

4.5

2.5

250μA

1mA

11.2mA

OUTPUT VOLTAGE (V)

6946 G07

–1

–3

–2

–4

–5

0.5

1.5

3.5

4.5

2.5

–40°C

25°C

105°C

ICP = 11.2mA

FREQUENCY (GHz)

0.5

–2.5

0.5

1.0

1.5

3.5

4 4.5

6946 G08

–3.5

–0.5

–1.5

–3.0

–4.0

–1.0

–2.0

2 2.5

5 5.5 6

–40°C

25°C

105°C

LTC6946-3

LC = 68nH

CS = 100pF

fVCO (GHz)

3.75

–50

–45

–40

–35

–30

4.25

4.75

5.25

5.75

6946 G09

–25

–20

4.00

4.50

5.00

5.50

LTC6946-3, fRF = fVCO/O

LC = 68nH, CS = 100pF

O = 3

O = 2

O = 1

O = 6

O = 4

O = 5

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