Datasheet

MAX2121
Complete Direct-Conversion L-Band Tuner
Typical Operating Characteristics
(MAX2121 Evaluation Kit: V
CC
= +3.3V, T
A
= +25°C, baseband output frequency = 5MHz, V
GC1
= +1.2V, default register settings
except BBG[3:0] = 1011, unless otherwise noted.)
5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2121 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.43.33.2
130
135
140
145
150
155
160
165
170
175
125
3.1 3.5
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40
°
C
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2121 toc02
SUPPLY VOLTAGE (V)
STANDBY SUPPLY CURRENT (mA)
3.43.33.2
1.5
2.0
2.5
3.0
1.0
3.1 3.5
T
A
= +85
°
C
T
A
= -40
°
C
HD3 vs. V
OUT
MAX2121 toc03
V
OUT
(V
P-P
)
BASEBAND 3RD-ORDER HARMONIC (dBc)
2.52.01.5
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-60
1.0 3.0
QUADRATURE PHASE ERROR
vs. LO FREQUENCY
MAX2121 toc04
LO FREQUENCY (MHz)
QUADRATURE PHASE ERROR (DEG)
1900165014001150
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
900 2150
f
BASEBAND
= 50MHz
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40
°
C
QUADRATURE MAGNITUDE MATCHING
vs. LO FREQUENCY
MAX2121 toc05
LO FREQUENCY (MHz)
QUADRATURE MAGNITUDE MATCHING (dB)
1900165014001150
0.2
0.4
0.6
0.8
1.0
0
900 2150
f
BASEBAND
= 50MHz
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40
°
C
QUADRATURE PHASE ERROR
vs. BASEBAND FREQUENCY
MAX2121 toc06
BASEBAND FREQUENCY (MHz)
QUADRATURE PHASE ERROR (DEG)
101
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
0.1 100
f
LO
= 1425MHz
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40
°
C
QUADRATURE MAGNITUDE MATCHING
vs. BASEBAND FREQUENCY
MAX2121 toc07
BASEBAND FREQUENCY (MHz)
QUADRATURE MAGNITUDE MATCHING (dB)
101
0.2
0.4
0.6
0.8
1.0
0
0.1 100
f
LO
= 1425MHz
T
A
= +85°C
T
A
= +25
°
C
T
A
= -40°C
BASEBAND FILTER FREQUENCY RESPONSE
MAX2121 toc08
BASEBAND FREQUENCY (MHz)
BASEBAND OUTPUT LEVEL (dB)
400300200100
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
-65
0500
BASEBAND FILTER FREQUENCY RESPONSE
MAX2121 toc09
BASEBAND FREQUENCY (MHz)
BASEBAND OUTPUT LEVEL (dB)
125100755025
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
-10
0150
T
A
= +25
°
C