MAX3580(2006) 데이터 시트보기 (PDF) - Maxim Integrated
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MAX3580 Datasheet PDF : 21 Pages
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Direct-Conversion TV Tuner
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3580 EV kit, VCC = +3.1V to +3.5V, GND = 0V. RF_AGC = BB_AGC = +2.85V, RF input terminated into a 75Ω load, BBI_ and
BBQ_ loaded by RL greater than 2kΩ and CL less than 10pF, VCO active, registers are set according to the recommended default
register conditions, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise
noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
SIGMA-DELTA FRACTIONAL-N SYNTHESIZER
REFERENCE OSCILLATOR
Frequency
fREF
Input Impedance
ZIN
Voltage Gain
Output Impedance
Buffered Output
ZOUT
10kΩ || 10pF load
DIVIDERS
RF N Divider Ratio
RF R Divider Ratio
Fractional-N Resolution
LO PHASE DETECTOR AND CHARGE PUMP
Phase-Detector Frequency
Charge-Pump Current
Gain = 0
ICP
Gain = 1
Charge-Pump Tri-State Current
MIN TYP MAX UNITS
4
27
MHz
10
kΩ
30
V/V
15
Ω
0.7
VP-P
5
251
—
1
2
—
20
Bits
4
27
MHz
600
µA
1200
-10
+10
µA
Charge-Pump Compliance
Range
LOCAL OSCILLATOR
Tuning Frequency Range
VCO Dividers
BASEBAND STAGE
Nominal Output Voltage
1dB Output Compression Point
Output Impedance
Passband AGC Range
Charge-pump positive to negative current
matching of ≤ ±5%
0.4
VCC -
0.4
V
fOSC Tank Frequency
2160
4
4400
16
MHz
—
P1dB
(Note 2)
Differential voltage at 3MHz
Differential
BB_AGC = 0.5V to 2.85V
1
1.6
2
60
30
50
VP-P
VP-P
Ω
dB
Passband Cutoff Attenuation
At 3.8MHz (UHF Mode);
at 3.325MHz (VHF Mode)
2
5
dB
Passband Differential Gain Error
2MHz to 3.8MHz, I channel vs. Q channel
(UHF mode)
-0.45
+0.45 dB
Passband Group Delay
From DC to 3.8MHz over any 1.1kHz band
5
ns
(UHF mode)
Group Delay Mismatch
From 0.1MHz to 3.8MHz, I channel vs. Q
channel (UHF mode) (Note 9)
<2
ns
4 _______________________________________________________________________________________
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