AD8345_15 datasheet(3/20 Pages) AD

部品番号	AD8345

部品情報	140 MHz to 1000 MHz Quadrature Modulator

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AD8345

Rev. B | Page 3 of 20

SPECIFICATIONS

VS = 5 V; LO = −2 dBm @ 800 MHz; 50 Ω source and load impedances; I and Q inputs 0.7 V ±0.3 V on each side for a 1.2 V p-p

differential input, I and Q inputs driven in quadrature @ 1 MHz baseband frequency. TA = 25°C, unless otherwise noted.

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

RF OUTPUT

Operating Frequency1

140

1000

MHz

Output Power

0.5

dBm

140 MHz

0.5

dBm

220 MHz

−3

−1

+2

dBm

800 MHz

Output P1dB

2.5

dBm

Noise Floor

−155

dBm/Hz

20 MHz offset from LO, all BB inputs at 0.7 V

Quadrature Error

0.5

Degree rms

CDMA IS95 setup (see Figure 38)

I/Q Amplitude Balance

0.2

dB

CDMA IS95 setup (see Figure 38)

LO Leakage

−41

dBm

140 MHz

−40

dBm

220 MHz

−42

−33

dBm

800 MHz

Sideband Rejection

−33

dBc

140 MHz

−48

−40

dBc

220 MHz

−42

−34

dBc

800 MHz

Third Order Distortion

−52

dBc

Second Order Distortion

−60

dBc

Equivalent Output IP3

25

dBm

Equivalent Output IP2

59

dBm

Output Return Loss (S22)

−20

dB

RESPONSE TO CDMA IS95

See Figure 38

BASEBAND SIGNALS

ACPR

−72

dBc

EVM

1.3

%

Rho

0.9995

LO INPUT

LO Drive level

−10

−2

0

dBm

LOIP Input Return Loss (S11)2

−5

dB

No termination on LOIP, LOIN at ac ground

−9

dB

50 Ω terminating resistor, differential drive via balun

BASEBAND INPUTS

Input Bias Current

10

μA

Input Capacitance

2

pF

DC Common Level

0.6

0.7

0.8

V

Bandwidth (3 dB)

80

MHz

Full power (0.7 V ±0.3 V on each input, see Figure 4)

ENABLE

Turn-On

2.5

μs

Enable high to output within 0.5 dB of final value

Turn-Off

1.5

μs

Enable low to supply current dropping below 2 mA

ENBL High Threshold (Logic 1)

+VS/2

V

ENBL Low Threshold (Logic 0)

+VS/2

V

POWER SUPPLIES

Voltage

2.7

5.5

V

Current Active

50

65

78

mA

Current Standby

70

μA

1 For information on operation below 140 MHz, see Figure 29.

2 See the LO Interface section for more details on input matching.

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