MAX2121 데이터 시트보기 (PDF) - Maxim Integrated
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MAX2121 Datasheet PDF : 18 Pages
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Complete Direct-Conversion L-Band Tuner
AC ELECTRICAL CHARACTERISTICS
(MAX2121 Evaluation Kit: VCC = +3.13V to +3.47V, TA = -40°C to +85°C, default register settings except BBG[3:0] = 1111. Typical
values measured at VCC = +3.3V, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP
MAIN SIGNAL PATH PERFORMANCE
Minimum Gain
Gain Flatness
fIN = 2175MHz
925MHz to 2175MHz (Note 2)
72
78
4
Input Frequency Range
(Note 3)
925
RF Gain-Control Range (GC1)
Baseband Gain-Control Range
0.5V < VGC1 < 2.7V
Bits BBG[3:0] = 1111 to 0000
65
73
11.5 13.5
In-Band Input IP3
(Note 4)
+2
Out-of-Band Input IP3
(Note 5)
+15
Input IP2
(Note 6)
+40
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
8
-75dBm CW input tone at 1500MHz
Starting with the same BBG[3:0] setting as above,
9
VGC1 is adjusted to back off RF gain by 10dB (Note 2)
Minimum RF Input Return Loss 925MHz < fRF < 2175MHz, in 75 system
12
BASEBAND OUTPUT CHARACTERISTICS
Nominal Output Voltage Swing
I/Q Amplitude Imbalance
RLOAD = 200//5pF
Measured at 500kHz
0.5
1
I/Q Quadrature Phase Imbalance Measured at 500kHz
Single-Ended I/Q Output
Impedance
Real ZO, from 1MHz to 140MHz
24
Output 1dB Compression Voltage Differential
3
Baseband Highpass -3dB
Frequency Corner
47nF capacitors at IDC_, QDC_
400
BASEBAND LOWPASS FILTERS (5th-Order Butterworth with 1st-Order Group Delay Compensation)
Filter Bandwidth (-3dB)
123.75
Rejection Ratio
At 247.5MHz
31
Group Delay
Up to 0.5dB bandwidth
1.0
3dB Bandwidth Tolerance
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
Frequency
12
MAX
6
2175
12
±1
3.5
±10
2175
251
30
1
30
UNITS
dB
dB
MHz
dB
dB
dBm
dBm
dBm
dB
dB
VP-P
dB
Degrees
VP-P
Hz
MHz
dB
ns
%
MHz
MHz
MHz
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