MAX2369 MAXIM [Maxim Integrated Products], MAX2369 Datasheet - Page 8

• Manufacturer Part Number: MAX2369
• Description: Complete Dual-Band Quadrature Transmitter
• Manufacturer: MAXIM [Maxim Integrated Products]

Complete Dual-Band
Quadrature Transmitter
8
32, 33, 34,
40, 45, 46,
Exposed
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paddle
23, 24
25, 26
30, 31
35, 42
47, 48
PIN
22
27
28
29
36
37
38
39
41
43
44
TANK-,
TANK+
Q+, Q-
NAME
SHDN
GND
GND
I+, I-
IFLO
IFCP
LOH
N.C.
V
V
REF
V
V
V
LOL
CC
CC
CC
CC
CC
Supply for the I/Q Modulator. Bypass with capacitor as close to the pin as possible. The bypass
capacitor must not share its ground vias with any other branches.
Differential Q-Channel Baseband Inputs to the Modulator. These pins go directly to the bases of
a differential pair and require an external common-mode bias voltage.
Differential I-Channel Baseband Inputs to the Modulator. These pins go directly to the bases of
a differential pair and require an external common-mode bias voltage.
Shutdown Input. A logic low on SHDN shuts down the entire IC. An R-C lowpass filter may be
used to reduce digital noise.
Supply Pin to the VCO Section. Bypass as close to the pin as possible. The bypass capacitor
should not share its vias with any other branches.
Buffered LO Output. Control the output buffer using register bit BUF_EN and the divide ratio
using the register bit BUF_DIV.
Differential Tank Pins for the IF VCO. These pins are internally biased to +1.6V.
No Connection. Leave these pins floating.
Reference Frequency Input. REF is internally biased to V
the reference source. This is a high-impedance port (25kΩ
Supply for the IF Charge Pump. This supply can differ from the system V
the pin as possible. The bypass capacitor must not share its vias with any other branches.
High-Impedance Output of the IF Charge Pump. Connect to the tune input of the IF VCOs
through the IF PLL loop filter. Keep the line from IFCP to the tune input as short as possible to
prevent spurious pickup, and connect the loop filter as close to the tune input as possible.
Supply Pin for Digital Circuitry. Bypass as close to the pin as possible. The bypass capacitor
must not share its vias with any other branch.
Ground. Connect to PC board ground plane.
Supply Pin. Bypass as close to the pin as possible. The bypass capacitor may share with sup-
ply pin for digital circuitry, pin 39.
High-band RF LO Input Port. AC-couple to this port.
Low-band RF LO Input Port. AC-couple to this port.
DC and AC GND Return for the IC. Connect to PC board ground plane using multiple vias.
FUNCTION
Pin Description (continued)
CC
II
- 0.7V and must be AC-coupled to
3pF).
CC
. Bypass as close to