Rainbow-electronics MAX2104 Manual do Utilizador descarregar pdf (Página 4)

MAX2104

Direct-Conversion Tuner IC for

Digital DBS Applications

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

= 4.75V to 5.25V, V

IOUT_

= V

QOUT_

= 0.59V

P-P

, C

IOUT_

= C

QOUT_

= 10pF, f

FLCLK

= 2MHz, R

IOUT_

= R

QOUT_

= 10kΩ,

FDOUB

= V

INSEL

= V

CPG1

= V

CPG2

= 2.4V, V

PLLIN+

= V

MOD+

= 1.3V, V

PLLIN-

= V

MOD-

= 1.1V, T

= +25°C. Typical values are at

= 5.0V and T

= +25°C, unless otherwise noted.)

15f = 925MHz

dBRFOUT Noise Figure (Note 11)

9f = 925MHz

dBm

RFOUT Output Third-Order

Intercept Point (Note 11)

1.8f = 1550MHz

2.5f = 2175MHz

0.5f = 925MHz

dBRFIN_ to RFOUT Gain (Note 11)

Includes effects from baseband filters,

measured at 125kHz baseband

4 degreesQuadrature Phase Error

Includes effects from baseband filters,

measured at 125kHz baseband

1.2 dBQuadrature Gain Error

FLCLK

= 2.0625MHz, f

= 31.4MHz

FLCLK

= 1.25MHz, f

= 19.3MHz

FLCLK

= 0.5MHz, f

= 8MHz

-0.5 +0.5

Deviation from ideal 7th order, Butterworth,

up to 0.7 x f

Baseband Frequency Response

(Note 1)

750C

IDC_

= C

QDC_

= 0.22µF Hz

Baseband Highpass Frequency

(Note 1)

IN_BAND

= 100Hz to 22.5MHz,

OUT_BAND

= 67.5MHz to 112.5MHz

Ratio of In-Filter-Band

to Out-of-Filter-Band Noise

PARAMETER SYMBOL MIN TYP MAX UNITS

-10 +10

LPF -3dB Cutoff-Frequency

Accuracy (Note 1)

-10 +10

-5.5 +5.5

CONDITIONS

833Controlled by FLCLK signal MHz

LPF -3dB Cutoff-Frequency Range

(Note 1)

8925MHz < f < 2175MHz dBRFOUT Return Loss (Notes 1, 11)

11.5f = 2175MHz

12f = 1550MHz

f = 2175MHz

f = 1550MHz

50IOUT_, QOUT_ ΩOutput Real Impedance (Note 1)

LO Leakage Power (Notes 7, 10) -66 dBmMeasured at RFIN_

RFOUT PORT (LOOPTHROUGH)

BASEBAND CIRCUITS

1 2 3 4 5 6 7 8 9

Digital DBS Applications 1

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