MC13190FC Freescale Semiconductor, MC13190FC Datasheet - Page 7

• Manufacturer Part Number: MC13190FC
• Manufacturer: Freescale Semiconductor

Specifications of MC13190FC

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

Application Information
3 Application Information
3.1 Introduction
The MC13190 is a 2.4 GHz transceiver that takes advantage of AM modulation to provide wide-band data
capability with simple, low-cost circuitry. The transmit and receive baseband filters are designed for
5 Mbps Manchester encoded data. This high data rate capability is intended to provide low latency, avoid
interference through short-burst protocol and allow for multiple retransmissions. The baseband interface is
simple to allow maximum flexibility in applications. Depending on protocol choices and bit error rate
requirements, the MC13190 is capable of supporting up to 1 Mbps data throughput.
3.2 Modes of Operation
The MC13190 has three modes of operation; Standby, Transmit and Receive. Refer to Figure 1, Simplified
Block Diagram, for circuit functions.
3.2.1 Standby Mode
Standby mode is automatically initiated when all enable (_EN) IC Contacts are kept low. The current
consumption during standby mode is typically 51 µA.
3.2.2 Transmit Mode
In the Transmit mode, the VCO frequency is set based on the reference by the PLL, the transmit chain is
enabled, the transmit data is filtered and AM-modulates the transmit carrier. This sequence is shown in
Figure 3. The switches to ground at the input of the LNA as well as the PLL are enabled ahead of the TX
chain. Optionally, an external Transmit/Receive switch can be used and LNA_SW can be left low. This
delay allows the PLL to settle prior to application of data. During power-up of the TX chain, TX_DATA
should be kept low. This guarantees the modulator powers up at minimum output power which will
prevent splatter.
LNA_SW,
PLL_EN
TX_EN
8-Bit Preamble
TX_DATA
5Mbps Data
25 µs
2.0 µs
5.0 µs
2.0 µs
No Specified Time Limit
Figure 3. Recommended Timing During Transmit Mode
It should be noted that the transmit baseband filter is optimized for 5 Mbps Manchester encoded data. The
MC13190 does not provide this encoding. See Section 3.6.1 for discussion of Manchester encoding.
The internal 2.4 GHz VCO includes circuitry to perform an automated trimming cycle. In the TRIM cycle,
the VCO will trim itself to the required frequency keeping the control voltage within the specified range.
After initial trimming, the VCO does not require trimming again until the supply voltage and/or the
temperature changes. Trimming every one to 10 seconds is, however, recommended. The TRIM cycle
timing is shown in Figure 4.
MOTOROLA
MC13190 Advance Information
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