ZFSM-101-2-B CEL, ZFSM-101-2-B Datasheet - Page 24

• Manufacturer Part Number: ZFSM-101-2-B
• Description: MODULE ZIGBEE 802.15.4
• Manufacturer: CEL
• Series: FreeStarr

Specifications of ZFSM-101-2-B

• Frequency: 2.4GHz ~ 2.4835GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 100mW (20dBm)
• Sensitivity: -92dBm
• Voltage - Supply: 2.4 V ~ 3.6 V
• Current - Receiving: 42mA
• Current - Transmitting: 150mA
• Data Interface: Solder Pad
• Memory Size: -
• Antenna Connector: On-Board, Trace
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Figure 14
noise amplifier (LNA) for greater range. An external antenna switch is used to multiplex the antenna
between receive and transmit. An LNA is in the receive path to add gain for greater receive sensitivity.
Two external baluns are required to convert the single-ended antenna switch signals to the differential
signals required by the radio. Separate RFIN and PAO signals are provided for connection with the baluns.
The CT_bias signal is programmed to provide the external switch control, and the polarity of CT_Bias for
the switch control is selectable. CT_bias has a high voltage of VDDA (nominal 1.8Vdc) and may require
a buffer transistor if the antenna switch requires a higher voltage control signal.
Figure 14
receive side, the RX antenna is ac-coupled to the differential RFIN inputs and these capacitors along with
inductor L1 form a matching network. Inductors L2 and L3 are ac-coupled to ground to form a frequency
trap. For the transmit side, the TX antenna is connected to the differential PAO outputs, and inductors L4
and L5 provide DC-biasing to VDDA but are ac-isolated. CT_Bias is not required or used.
24
shows two dual port configurations. First is a single antenna configuration with an external low
also shows a dual antenna configuration where there is a RX antenna and a TX antenna. For the
Using External Antenna Switch with LNA
A nt
S w
V D D
LN A
B a lun
B a lun
Figure 14. Dual Port RF Configuration Examples
B yp ass
B yp ass
MC13202 Technical Data, Rev. 1.5
V D D A
L1
R F IN _ M (P A O _ M )
R F IN _ P (P A O _P )
M C 1320 2/03
P A O _ P
P A O _ M
(A nt S w C tl)
C T _ B ias
RX Antenna
TX Antenna
L1
Bypass
L2
L4
Using Dual Antenna
VDDA
L3
L5
Bypass
RFIN_P (PAO_P)
RFIN_M (PAO_M)
PAO_P
PAO_M
CT_Bias
Freescale Semiconductor
MC13202/03