srf-2724cs RF Micro Devices, srf-2724cs Datasheet - Page 5

• Manufacturer Part Number: srf-2724cs
• Description: 2.4ghz Low-if 1.5mbps Fsk Transceiver
• Manufacturer: RF Micro Devices

Prelim DS090410
Pin
12
18
10
13
14
16
19
20
23
24
25
27
29
31
8
GNDRXMX2
GDNRXMX
GNDDMD
Function
GNDPLL
RVQMIF
RVDMD
GNDRF
RVVCO
VVREG
RVPLL
RVLO
VCCA
GND
VDD
VSS
Description
Digital Ground. Ground for digital I/O circuits and control logic
PLL Supply. DC power supply decoupling point for the PLL dividers, phase
detector, and charge pump. This pin is connected to the output of the regu-
lator and to the PLL supplies. There must be a 220nF capacitor to ground
from this pin to decouple (bypass) noise and to stabilize the regulator.
Ground for the PLL dividers, phase detector, and charge pump.
DC Power Supply Input to the VCO voltage regulator. Must be connected to
RVQMIF (pin 27) or RVDMD (pin 29) via decoupling network.
DC power supply decoupling point for the VCO. Connected to the output of
the VCO regulator. A 220nF capacitor must be tied between this pin and
ground to decouple (bypass) noise and to stabilize the regulator.
DC ground for VCO and LO circuits.
Ground return for the Receive RF input and the Transmit RF output.
Signal ground for the Receive mixers.
Signal ground for the Receive mixers.
DC power supply decoupling point for the LO Chain. Connected to the out-
put of a regulator. A 220nF capacitor must be tied between this pin and
ground to decouple (bypass) noise and to stabilize the regulator.
DC power supply Input to Voltage Regulators and unregulated loads: 2.7 to
3.8V. VCCA is the main (or master) analog VCC pin. There must be capaci-
tors to ground from this pin to decouple (bypass) supply noise.
DG ground to IF, Demodulator, and Data Slicer circuits.
DC power supply decoupling point for Quadrature Mixer and IF filter cir-
cuits. A 220nF capacitor must be tied between this pin and ground to
decouple (bypass) noise and to stabilize the regulator.
DC power supply decoupling point for IF, Demodulator, and Data Slicer cir-
cuits. A 220nF capacitor must be tied between this pin and ground to
decouple (bypass) noise and to stabilize the regulator.
DC power supply input to the interface logic and control registers. This sup-
ply is not connected internally to any other supply pin, but its voltage must
be less than or equal to the VCCA supply and greater than 2.7V. A capacitor
must be tied between this pin and ground to decouple (bypass) noise.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
Proposed
Power and Ground
SRF-2724CS
Interface Schematic
See Pin 11 below.
GNDRF
RXI
17
18
VCCA
24
VSS
8
VSS
VCCA
(PIN 8)
0.7V
(PIN 24)
4k
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