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11-245
RF2948B
Rev A6 040930
Pin
Function
Description
Interface Schematic
31
VREF 1
This is a bypass pin for the bias circuits of the GmC filter amps and for
I/Q inputs. No current should be drawn from this pin (<10
µA). 1.7V
nominal.
32
RX VGC
Receiver IF and baseband amp gain control voltage. Negative slope.
Pkg
Base
Ground for all circuitry in the device. A very low inductance from the
base to the PCB groundplane is essential for good performance. Use
an array of vias immediately underneath the device.
ESD
This diode structure is used to provide electrostatic discharge protec-
tion to 3kV using the Human body model. The following pins are pro-
tected: 1-4, 7, 8, 10, 19-32.
V
CC
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