User Manual

MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
_______________________________________________________________________________________ 5
PARAMETERS CONDITIONS
MIN
TYP
MAX
UNITS
Group Delay
t
gd
, RFIN to MIX_I/Q, frequency up to
-1dB baseband width
1.8 ns
Differential Group Delay
(Note 2)
∆t
gd
(between mixer I and Q channels) 1 ns
Output Impedance
Z
out
, MIX_I, MIX_Q, frequency up to -1dB baseband
width
1.4 Ω
Mixer Output Level
(Note 2)
MIX_I, MIX_Q, baseband output at -1dB compression
point
1.4 2.1
Vp-p
LO DOUBLER, LO BUFFER, QUADRATURE GENERATOR
MAX2700
900 1050
X2_EN = GND
MAX2701
1050 1250
MAX2700
1800 2100
LO Frequency Range
(Notes 1, 2)
X2_EN = V
CC
MAX2701
2100 2500
MHz
LO Input Power (Note 7) X2_EN = V
CC
or GND -16 -13 -10
dBm
f
LO
= 900MHz to
1050MHz, X2_EN = GND
2.0
MAX2700
f
LO
= 1800MHz to
2100MHz, X2_EN = V
CC
1.8
f
LO
= 1050MHz to
1250MHz, X2_EN = GND
1.7
LO VSWR
MAX2701
f
LO
= 2100MHz to
2500MHz, X2_EN = V
CC
2.0
−
Quadrature Error ∆φ , MIX_I to MIX_Q 1.5 4.5
degrees
BASEBAND STAGE 1 (IIN1 TO IOUT1, QIN1 TO QOUT1)
-1dB bandwidth (Note 2) 14 26
Channel Bandwidth
-3dB bandwidth 56
MHz
Input Impedance IIN1+, IIN1-, QIN1+, QIN1-, single-ended 1.9 kΩ
Input Impedance Mismatch Between IIN1+ and QIN1+ 4 Ω
V
AGC
= 0.5V
-1.5
2.2 6
Voltage Gain (G
V
)
V
AGC
= 2.0V 37 40 42
dB
Voltage Gain Mismatch
Mismatch between IIN1 to IOUT1 and QIN1 to QOUT1,
0.5V < V
AGC
< 2 V
0.2 dB
VGA1 Gain Slope
Guaranteed Monotonic over 0.5V <V
AGC
< 2V,
V
AGC
= 1.25V
34
dB/V
V
AGC
= 2.0V 7.5
Noise Figure Z
S
= 1.1kΩ (Note 8)
V
AGC
= 0.5V 34
dB
Phase Shift (Note 2) For 10dB of gain (with AGC) 0.5 0.9
degrees
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2700/MAX2701 EV kit (Figure 3), V
CC
= +3.0V, T
A
= +25°C, SHDN = GAIN_SET = V
CC
, X2_EN = GND, CEXT+ connected to
CEXT-, P
LO
= -13dBm, F
LO
= 980MHz (MAX2700) and 1200MHz (MAX2701), P
LNAIN
= -30dBm, P
RFIN
= -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ω source, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩ load; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩ AC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set V
AGC
= 1.25V, unless otherwise noted.)