MAX19999ETX+ Maxim Integrated Products, MAX19999ETX+ Datasheet - Page 15

• Manufacturer Part Number: MAX19999ETX+
• Description: Up-Down Converters IC DOWNCONVERTER 2CH earity, 3000MHz to 4
• Manufacturer: Maxim Integrated Products

Specifications of MAX19999ETX+

• Maximum Input Frequency: 4000 MHz
• Maximum Power Dissipation: 8700 mW
• Mounting Style: SMD/SMT
• Maximum Operating Frequency: 500 MHz
• Maximum Power Gain: 9.3 dB
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: TQFN-36 EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX19999 provides high linearity and low noise fig-
ure for a multitude of 3000MHz to 4000MHz WiMAX and
LTE base-station applications. This device operates over
an LO range of 2650MHz to 3700MHz and an IF range of
50MHz to 500MHz. Integrated baluns and matching cir-
cuitry allow 50Ω single-ended interfaces to the RF and
LO ports. The integrated LO buffer provides a high drive
level to the mixer core, reducing the LO drive required at
the MAX19999’s input to a range of -3dBm to +3dBm.
The IF port incorporates a differential output, which is
ideal for providing enhanced 2RF-2LO performance.
The MAX19999’s two RF inputs (RFMAIN and RFDIV)
provide a 50Ω match when combined with a series DC-
blocking capacitor. This DC-blocking capacitor is
18, 23, 28, 31, 34
2, 5, 6, 8, 12, 15,
3, 7, 20, 22, 24,
4000MHz Downconversion Mixer with LO Buffer
4, 10, 16, 21,
25, 26, 27
30, 36
13, 14
32, 33
PIN
11
17
19
29
35
—
1
9
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LO_ADJ_M
LO_ADJ_D
IFM-, IFM+
IFD+, IFD-
IFM_SET
IFD_SET
RFMAIN
NAME
RFDIV
GND
GND
V
LO
EP
Detailed Description
CC
Dual, SiGe High-Linearity, 3000MHz to
Main Channel RF Input. Internally matched to 50Ω. Requires an input DC-blocking capacitor.
Ground. Not internally connected. Ground these pins or leave unconnected.
Ground. Internally connected to the exposed pad (EP). Connect all ground pins and the exposed
pad together.
Power Supply. Connect bypass capacitors as close as possible to the pin (see the Typical
Application Circuit).
Diversity Channel RF Input. This input is internally matched to 50Ω. Requires a DC-blocking
capacitor.
IF Diversity Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias
current for the diversity IF amplifier.
Diversity Mixer Differential IF Output. Connect pullup inductors from each of these pins to V
(see the Typical Application Circuit).
LO Diversity Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias
current for the diversity LO amplifier.
Local Oscillator Input. This input is internally matched to 50Ω. Requires an input DC-blocking
capacitor.
LO Main Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias current
for the main LO amplifier.
Main Mixer Differential IF Output. Connect pullup inductors from each of these pins to V
(see the Typical Application Circuit).
IF Main Amplifier Bias Control. Connect a resistor from this pin to ground to set the bias current for
the main IF amplifier.
Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses
multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These
multiple via grounds are also required to achieve the noted RF performance
RF Input and Balun
required because the input is internally DC shorted to
ground through each channel’s on-chip balun. When
using a 1.5pF DC-blocking capacitor, the RF port input
return loss is typically 15dB over the RF frequency
range of 3200MHz to 3900MHz.
A two-stage internal LO buffer allows a wide input
power range for the LO drive. All guaranteed specifica-
tions are for an LO signal power from -3dBm to +3dBm.
The on-chip low-loss balun, along with an LO buffer,
drives the double-balanced mixer. All interfacing and
matching components from the LO input to the IF out-
puts are integrated on chip.
The core of the MAX19999 is a pair of double-bal-
anced, high-performance passive mixers. Exceptional
FUNCTION
LO Input, Buffer, and Balun
High-Linearity Mixer
Pin Description
CC
CC
15