Rainbow Electronics MAX2769B - Manual (Page 3)

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MAX2769B
Universal GPS Receiver
AC ELECTRICAL CHARACTERISTICS*
(MAX2769B EV kit, V
CC_
= 2.7V to 3.3V, T
A
= -40NC to +85NC, PGM = Ground. Registers are set to the default power-up states. LNA
input is driven from a 50I source. All RF measurements are done in the analog output mode with ADC bypassed. PGA gain is set
to 51dB gain by serial-interface word GAININ = 111010. Maximum IF output load is not to exceed 10kI||7.5pF on each pin. Typical
values are at V
CC_
= 2.85V and T
A
= +25NC, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
CASCADED RF PERFORMANCE
RF Frequency
L1 band 1575.42 MHz
Noise Figure
LNA1 input active, default mode (Note 3) 1.4
dB LNA2 input active, default mode (Note 3) 2.7
Measured at the mixer input 10.3
Out-of-Band 3rd-Order Input
Intercept Point
Measured at the mixer input (Note 4) -7 dBm
In-Band Mixer Input Referred 1dB
Compression Point
Measured at the mixer input -85 dBm
Mixer Input Return Loss 10 dB
Image Rejection 25 dB
Spurs at LNA1 Input
LO leakage -101
dBm
Reference harmonics leakage -103
Maximum Voltage Gain Measured from the mixer to the baseband analog output 91 96 103 dB
Variable Gain Range 55 59 dB
FILTER RESPONSE
Passband Center Frequency
FBW = 00 4
MHz FBW = 10 4
FBW = 01 9.27
Passband 3dB Bandwidth
FBW = 00 2.5
MHz FBW = 10 4.2
FBW = 01 9.66
Lowpass 3dB Bandwidth FBW = 11 9 MHz
Stopband Attenuation
3rd-order filter, bandwidth = 2.5MHz, measured at 4MHz offset 30
dB
5th-order filter, bandwidth = 2.5MHz, measured at 4MHz offset 40 49.5
LNA
LNA1 INPUT
Power Gain
19 dB
Noise Figure 0.83 dB
Input IP3 (Note 5) -1.1 dBm
Output Return Loss 10 dB
Intput Return Loss 8 dB
*The parametric values (min, typ, max limits) shown in the Electrical Characteristics table supersede values quoted elsewhere in this data sheet.