MAX2388EGC+ Maxim Integrated Products, MAX2388EGC+ Datasheet - Page 9

• Manufacturer Part Number: MAX2388EGC+
• Description: RF Mixer W-CDMA LNA-Mixer wit h High-Low Gain-Mode
• Manufacturer: Maxim Integrated Products

Specifications of MAX2388EGC+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The mixer output appears on the differential IF+ and IF-
pins. These open-collector outputs require an external
inductor to V
requires a matching network for coupling to an external
IF filter. Figures 1 and 2 show examples of differential
and single-ended IF port connections.
A properly designed PC board is essential to any
RF/microwave circuit. Keep RF signal lines as short as
possible to minimize losses and radiation. Always use
controlled impedance lines on all high-frequency inputs
and outputs and use low-inductance connections to
ground on all GND pins. At the mixer outputs, keep the
differential lines together and of the same length to
ensure signal balance.
Figure 1. MAX2387/MAX2388/MAX2389 Differential IF Load; Single-Ended VCO
RX BPF
CC
Applications Information
for DC biasing. This port typically
_______________________________________________________________________________________
6800pF
0.8pF
2.2nH
RX
TX
V
CC
20Ω
10nF
0.8pF
GAIN
LNA_OUT
10kΩ
MIX_IN
2.2nH
IF Output Port
10nF
1
2
3
BIAS_SET
SHDN
10kΩ
24kΩ
Layout
MAX2387
MAX2388
MAX2389
12
4
82pF
11
5
GND
LO+
BIAS
W-CDMA LNA/Mixer ICs
For the best gain and noise performance, use high-
quality components for the LNA input matching circuit,
and solder the slug evenly to the board ground plane.
For the power supplies, a star topology works well to
isolate between different sections of the device. Each
V
decoupling capacitors that provide low impedance at
the RF frequency of interest close to all V
tions. The central V
capacitor as well. (Use MAX2387/MAX2388/MAX2389
EV kit as an example.)
TRANSISTOR COUNT: 208
10
6
CC
LO-
82pF
LNA_IN
VCO
node has its own path to a central V
9
8
7
Typical Application Circuits
IF+
IF-
V
CC
10kΩ
6800pF
27nH
CC
27nH
should have a large decoupling
22pF
39pF
39pF
Chip Information
10µF
V
CC
Z
L
SAW
IF
CC
CC
connec-
. Place
9