MAX3544 Просмотр технического описания (PDF) - Maxim Integrated

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MAX3544

Multiband Digital Television Tuner

Maxim Integrated 

Multiband Digital Television Tuner

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX3544 Evaluation Kit, RF center frequency = 666MHz, IF center frequency = 36.15MHz, registers set according to Table 1,

fREF = 16MHz, VRFVGC = VIFVGC = 3.0V, VCC = 3.3V, TA = +25NC, unless otherwise noted.)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

RF Gain Control Range

(gain at VRFVGC = 3.0V) - (gain at VRFVGC = 0.5V)

53

dB

Noise Figure

4

dB

Image Rejection

Image applied at 77.8MHz

47MHz to 470MHz

> 70

above desired channel’s

dB

center frequency

470MHz to 862MHz

> 65

IF VARIABLE-GAIN AMPLIFIER

Maximum Voltage Gain

Output load impedance > 2kI||3pF, differential load

60

dB

Minimum Voltage Gain

In-Channel Output V1dB

DETECTOR

Output load impedance > 2kI||3pF, differential load,

VIFVGC = 0.5V

36.15MHz CW output signal

19

> 2.5

dB

VP-P

Wideband Detector

Input-Referred Attack Point

Programmable, R0B[6:4] = 100, CW input signal

-36

dBm

Narrowband Detector

Input-Referred Attack Point

Programmable, R0B[2:0] = 011, CW input signal

-47

dBm

SIGMA-DELTA FRAC-N SYNTHESIZER

N-Divider Value

Fractional-N Resolution

Phase-Detector Frequency

fXTAL/2

Phase-Detector Frequency

fXTAL/1

REFERENCE OSCILLATOR

Frequency

(Note 2)

External Overdrive Level

AC-coupled sine-wave input

REFERENCE OSCILLATOR OUTPUT BUFFER

Output Frequency

/1, /4 modes

Output Level

Load Impedance > 20kI||3pF

19

251

20

Bits

8

10.5 MHz

16

21

MHz

16

32

MHz

0.5

1.5

VP-P

4

4

fXTAL MHz

1.1

VP-P

Note 1: Guaranteed by production test at +25NC. 0NC and +70NC are guaranteed by design and characterization.

Note 2: Guaranteed by design and characterization.

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