TRC101 Просмотр технического описания (PDF) - RF Monolithics, Inc

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TRC101

300-1000 MHz RF Transceiver

RF Monolithics, Inc 

3. TRC101 Functional Characteristics

LN A

0/ 90

RF _P

TX/RX

RF _N

PA

VCO

P LL

/N

FSK

I/Q

ASK

D E MOD

RSSI

OSC

+

-

BATT DET

CONT ROL

LO G I C

SDI

SDO

SCK

nC S

nI R Q

DA T A / nF S E L

CR/F INT /F CA P

CLK OUT

nINT /DDE T

R

X T A L/RE F

RSSIA

VDD GND

Figure 2. Functional Block Diagram

nRE S E T

Input/Output Amplifier

The output power amplifier is an open-collector, differential output with programmable output power which

can directly drive a loop or dipole antenna, and with proper matching may also drive a monopole antenna.

Incorporated in the power amplifier is an automatic antenna tuning circuit to avoid manual tuning during

production and to offset “hand effects”. Registers common to the Power Amplifier are:

• Power Management Register

• Transmit Configuration Register

The input LNA has selectable gain (0dB, -6dB, -14dB, -20dB) which may be useful in an environment with

strong interferers. The LNA has a 250ΩOhm differential input impedance which requires a matching

circuit when connected to 50 Ohm devices. Registers common to the LNA are:

• Power Management Register

• Receiver Control Register

Baseband Data and Filtering

The baseband receiver has several programmable options that optimize the data link for a wide range of

applications. The programmable functions include:

• Receive bandwidth

• Receive data rate

• Baseband Analog Filter

• Baseband Digital Filter

• Clock Recovery (CR)

• Receive FIFO

• Data Quality Detector

• Valid Data Detector

The receive bandwidth is programmable from 67kHz to 400kHz to accommodate various FSK modulation

deviations. If the deviation is known for a given transmitter, the best results are obtained with a

bandwidth at least twice the transmitter FSK deviation.

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