Complete Single-Conversion

Television Tuner

4

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AC ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum gain setting

54

59

63

Passband Voltage Gain

Source load =

1.1k

Ω,

output load = 1k

Ω

Minimum gain setting

21

dB

Passband Gain Flatness

32MHz to 40MHz (Note 2)

1.2

dB

Output Voltage

2.5

AGC Gain Slope

27

dB/V

Equivalent Input-Voltage Noise Density

(Note 2)

7.3

nV/

√Hz

Noise Figure Change vs. Attenuation

< 0.35

dB/dB

IM3

-56

dBc

IF OVERLOAD DETECTOR (See the IF Overload Detector Section)

Output Overload Attack Point

0.7

Attack Point Accuracy

OD REG = 3

±1

dB

Detector Output-Voltage Range

(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

500

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

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 2: Guaranteed by design and characterization.