LTC5599IUFPBF View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC5599IUFPBF

30MHz to 1300MHz Low Power Direct Quadrature Modulator

Linear Technology 

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LTC5599

Typical Performance Characteristics VCC = 3.3V, EN = 3.3V, VCTRL = 3.3V, TC = 25°C,

PLO = 0dBm, fLO = 500MHz, BBPI, BBMI, BBPQ, BBMQ common mode DC voltage VCMBB = 1.4VDC, I and Q baseband input signal = 2MHz,

2.1MHz, 1VP-P(DIFF, I or Q), I and Q 90° shifted, lower sideband selection, TEMPUPDT = 0, register 0x00 value according to Table 5, all

other registers set to default values, unless otherwise noted. Test circuit is shown in Figure 13.

Output IP2 vs VCTRL Gain

70

AGCTRL = 1

65

60

55

50

45

40

–17

2.7V, 25°C

3.3V, 25°C

3.6V, 25°C

3.3V, 85°C

3.3V, –40°C

3.3V, –10°C

3.3V, 105°C

–15 –13 –11 –9

–7

GAIN SET BY VCTRL (dB)

5599 G55

Gain vs Digital Gain Setting

2.7V, 25°C

–5

3.3V, 25°C

3.6V, 25°C

–9

3.3V, 85°C

3.3V, –40°C

–13

–17

–21

–25

–19

AGCTRL = 1

–15 –11

–7

DIGITAL GAIN SETTING

–3

5599 G58

LO Leakage vs VCTRL Gain

–30

2.7V, 25°C

3.3V, 25°C

–40

3.6V, 25°C

3.3V, 85°C

3.3V, –40°C

–50

3.3V, –10°C

3.3V, 105°C

–60

–70

AGCTRL = 1

–80

–77 –67 –57 –47 –37 –27 –17 –7

GAIN SET BY VCTRL (dB)

5599 G56

Gain Minus Digital Gain vs Digital

Gain Setting

–2

–3

–4

–5

–6

–19

2.7V, 25°C

3.3V, 25°C

3.6V, 25°C

3.3V, 85°C

3.3V, –40°C

–15 –11

–7

DIGITAL GAIN SETTING

–3

5599 G59

Side-Band Suppression vs

VCTRL Gain

–20

–25

–30

–35

–40

–45

–50

–55

–60

–77

2.7V, 25°C

3.3V, 25°C

3.6V, 25°C

3.3V, 85°C

3.3V, –40°C

3.3V, –10°C

3.3V, 105°C

AGCTRL = 1

–67 –57 –47 –37 –27 –17 –7

GAIN SET BY VCTRL (dB)

5599 G57

PRF, IM2, IM3 vs Baseband

Amplitude

10

PRF FOR DG = 0, –4, –8, –12, –16, –19,

–10

–30

IM3 FOR DG = 0, –19,

–50 –16, –4, –12, –8

–70

–90

0.1

IM2 FOR DG = 0, –4, –8, –19, –12, –16

1

BASEBAND AMPLITUDE (VPEAK(DIFF))

5599 G60

Output IP3 vs Baseband Amplitude

20

15

10

5

0

–5

0.1

DG = 0

DG = –8

DG = –16

DG = –4

DG = –12

DG = –19

1

BASEBAND AMPLITUDE (VPEAK(DIFF))

5599 G61

12

Output IP2 vs Baseband Amplitude

70

60

50

40

30

0.1

DG = 0

DG = –8

DG = –16

DG = –4

DG = –12

DG = –19

1

BASEBAND AMPLITUDE (VPEAK(DIFF))

5599 G62

For more information www.linear.com/LTC5599

LO Leakage vs LO Frequency for

Gain TempComp Off

–40

TEMPUPDT = 1

–45

–50

–55

–60

–65

–70

50

2.7V, 25°C

3.3V, 25°C

3.6V, 25°C

3.3V, 85°C

3.3V, 105°C

3.3V, –10°C

3.3V, –40°C

250 450 650 850 1050 1250

LO FREQUENCY (MHz)

5599 G63

5599f

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