Rainbow Electronics MAX9995 - Manual (Page 8)

MAX9995
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz
Downconversion Mixer with LO Buffer/Switch
8 _______________________________________________________________________________________
PIN NAME FUNCTION
1 RFMAIN Main Channel RF Input. Internally matched to 50 Ω. Requires an input DC-blocking capacitor.
2 TAPMAIN Main Channel Balun Center Tap. Connect a 0.033µF capacitor from this pin to the board ground.
3, 5, 7, 12, 20, 22,
24, 25, 26, 34
GND Ground
4, 6, 10, 16, 21, 30,
36
V CC
Power Supply. Connect bypass capacitors as close to the pin as possible (see the Typical
Application Circuit).
8 TAPDIV Diversity Channel Balun Center Tap. Connect a 0.033µF capacitor from this pin to the ground.
9 RFDIV Diversity Channel RF Input. Internally matched to 50 Ω. Requires an input DC-blocking capacitor.
11 IFD_SET
IF Diversity Amplifier Bias Control. Connect a 1.2k Ω resistor from this pin to ground to set the
bias current for the diversity IF amplifier.
13, 14 IFD+, IFD-
Diversity Mixer Differential IF Output. Connect pullup inductors from each of these pins to V CC
(see the Typical Application Circuit).
15 IND_EXTD Connect a 10nH inductor from this pin to ground to increase the RF-IF and LO-IF isolation.
17 LO_ADJ_D
LO Diversity Amplifier Bias Control. Connect a 392 Ω resistor from this pin to ground to set the
bias current for the diversity LO amplifier.
18, 28 N.C. No Connection. Not internally connected.
19 LO1
Local Oscillator 1 Input. This input is internally matched to 50 Ω. Requires an input DC-blocking
capacitor.
23 LOSEL Local Oscillator Select. Set this pin to high to select LO1. Set to low to select LO2.
Pin Description
LO RETURN LOSS vs. LO FREQUENCY
(LO INPUT UN SELECTED)
MAX9995 toc37
FREQUENCY (MHz)
RETURN LOSS (dB)
1900 1800 1700 1600 1500
30
25
20
15
10
5
0
35
1400 2000
P LO = -3dBm TO +3dBm
310
330
325
320
315
340
335
360
355
350
345
365
-20 -5 10 25 40 55 70 85
SUPPLY CURRENT vs. TEMPERATURE (T C )
MAX9995 toc38
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V CC = 5.25V
V CC = 4.75V
V CC = 5.0V
Typical Operating Characteristics (continued)
(Typical Application Circuit, V CC = 5.0V, P RF = -5dBm, P LO = 0dBm, LO is low-side injected for a 200MHz IF, T C = +25°C.)