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Ac electrical characteristics (continued) – Rainbow Electronics MAX3541 User Manual

Page 4

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MAX3541

Complete Single-Conversion
Television Tuner

4

_______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX3541 EV kit, V

CC

= +3.1V to +3.5V, T

A

= -40°C to +85°C, 75Ω system impedance, default register settings, V

RFAGC

= V

IFAGC

=

+3V (minimum attenuation), unless otherwise noted. Typical values are at V

CC

= +3.3V, T

A

= +25°C, unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum gain setting
(V

IFAGC

= 3V)

54

59

63

Passband Voltage Gain

S our ce l oad =
1.1k

Ω,

output load = 1k

Ω

Minimum gain setting
(V

IFAGC

= 0.5V)

21

dB

Passband Gain Flatness

32MHz to 40MHz (Note 1)

1.2

dB

Output Voltage

V

IFAGC

= 3V (Note 1)

2.5

V

P-P

AGC Gain Slope

V

IFAGC

= 3V to 0.5V (Note 1)

27

dB/V

Equivalent Input Voltage Noise Density

At 36MHz, maximum gain (V

IFAGC

= 3V)

(Note 1)

7.3

nV/

√Hz

Noise Figure Change vs. Attenuation

< 0.35

dB/dB

IM3

V

OUT

= 1V

P-P

, 40dB < gain < 60dB (Note 1)

-56

dBc

IF OVERLOAD DETECTOR (See the IF Overload Detector Section)

Output Overload Attack Point

0.7

V

P-P

Attack Point Accuracy

OD REG = 3

±1

dB

Detector Output Voltage Range

Negative polarity, overload reduces V

DET

(open collector, 0.3mA sink)

0.5

3.0

V

Detector Gain

70

V/V

FREQUENCY SYNTHESIZER

REFERENCE OSCILLATOR

Frequency

8

MHz

DIVIDERS

RF N-Divider Ratio

256

32,767

RF R-Divider Ratio

16

127

LO PHASE DETECTOR AND CHARGE PUMP

Comparison Frequency

63

250

kHz

CP = 00

0.5

CP = 01

1

CP = 10

1.5

Charge-Pump Current

CP = 11

2

mA

Charge-Pump Three-State Current

±5

nA

Charge-Pump Compliance Range

0.4

V

CC

-

0.4

V

Charge-Pump Current Matching

5

%

LOCAL OSCILLATOR

VCO Tuning Range

Tank frequency

2200

4400

MHz

VCO Tuning Gain

Tank oscillator gain

500

MHz/V

2-WIRE SERIAL INTERFACE

Clock Frequency

400

kHz

Note 1: Guaranteed by design and characterization.