MAX2112ETI(2007) 查看數據表（PDF） - Maxim Integrated
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MAX2112ETI Datasheet PDF : 19 Pages
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Complete, Direct-Conversion
Tuner for DVB-S2 Applications
AC ELECTRICAL CHARACTERISTICS
(MAX2112 Evaluation Kit: VCC = +3.13V to +3.47V, TA = 0°C to +70°C (MAX2112CTI+), TA = -40°C to +85°C (MAX2112ETI+), default
register settings except ICP = 1 and BBG[3:0]=1011. Typical values measured at VCC = +3.3V, TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
MAIN SIGNAL PATH PERFORMANCE
Input Frequency Range
(Note 2)
925
RF Gain-Control Range (GC1)
0.5V < VGC1 < 2.7V
65
Baseband Gain-Control Range
Bits GC2 = 1111 to 0000
13
In-Band Input IP3
(Note 3)
Out-of-Band Input IP3
(Note 4)
Input IP2
(Note 5)
Adjacent Channel Protection
(Note 6)
Noise Figure
VGC1 is set to 0.5V (maximum RF gain) and BBG[3:0] is
adjusted to give a 1VP-P baseband output level for a
-75dBm CW input tone at 1500MHz
Starting with the same BBG[3:0] setting as above, VGC1
is adjusted to back off RF gain by 10dB (Note 7)
Minimum RF Input Return Loss
925MHz < fRF < 2175MHz, in 75Ω system
BASEBAND OUTPUT CHARACTERISTICS
Nominal Output Voltage Swing
RLOAD = 2kΩ//10pF
0.5
I/Q Amplitude Imbalance
Measured at 500kHz; filter set to 22.27MHz
I/Q Quadrature Phase Imbalance Measured at 500kHz; filter set to 22.27MHz
Single-Ended I/Q Output Impedance Real ZO, from 1MHz to 40MHz
Output 1dB Compression Voltage Differential
Baseband Highpass -3dB
Frequency Corner
47nF capacitors at IDC_, QDC_
BASEBAND LOWPASS FILTERS
Filter Bandwidth Range
4
Rejection Ratio
Group Delay
At 2 x f-3dB
Up to 1dB bandwidth
Ratio of In-Filter-Band to Out-of-
Filter-Band Noise
fINBAND = 100Hz to 22.5MHz, fOUTBAND = 87.5MHz to
112.5MHz
FREQUENCY SYNTHESIZER
RF-Divider Frequency Range
925
RF-Divider Range (N)
19
Reference-Divider Frequency Range
12
Reference-Divider Range (R)
1
Phase-Detector Comparison
12
Frequency
VOLTAGE-CONTROLLED OSCILLATOR AND LO GENERATION
Guaranteed LO Frequency Range
925
LO Phase Noise
fOFFSET = 10kHz
fOFFSET = 100kHz
fOFFSET = 1MHz
TYP MAX UNITS
2175 MHz
73
dB
15
dB
+2
dBm
+15
dBm
+40
dBm
25
dB
8
dB
9
12
12
dB
1
VP-P
±1
dB
3.5 Degrees
30
Ω
3.3
VP-P
400
Hz
40
MHz
39
dB
37
ns
25
dB
2175
251
30
1
30
MHz
MHz
MHz
-97
-100
-122
2175 MHz
dBc/Hz
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