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MAX7030

Maxim Integrated Products
Part Number MAX7030
Manufacturer Maxim Integrated Products
Description ASK Transceiver
Published Jun 10, 2009
Detailed Description 19-3706; Rev 0; 5/05 Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL General Description ...
Datasheet PDF File MAX7030 PDF File

MAX7030
MAX7030

Overview
19-3706; Rev 0; 5/05 Low-Cost, 315MHz, 345MHz, and 433.
92MHz ASK Transceiver with Fractional-N PLL General Description www.
datasheet4u.
com Features ♦ +2.
1V to +3.
6V or +4.
5V to +5.
5V Single-Supply Operation ♦ Single-Crystal Transceiver ♦ Factory-Preset Frequency (No Serial Interface Required) ♦ ASK/OOK Modulation ♦ +10dBm Output Power into 50Ω Load ♦ Integrated TX/RX Switch ♦ Integrated Transmit and Receive PLL, VCO, and Loop Filter ♦ > 45dB Image Rejection ♦ Typical RF Sensitivity*: -114dBm ♦ Selectable IF Bandwidth with External Filter ♦ < 12.
5mA Transmit-Mode Current ♦ < 6.
7mA Receive-Mode Current ♦ < 800nA Shutdown Current ♦ Fast-On Startup Feature, <250µs ♦ Small, 32-Pin, Thin QFN Package *0.
2% BER, 4kbps Manchester-encoded data, 280kHz IF BW MAX7030 The MAX7030 crystal-based, fractional-N transceiver is designed to transmit and receive ASK/OOK data at factory-preset carrier frequencies of 315MHz, 345MHz†, or 433.
92MHz with data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded).
This device generates a typical output power of +10dBm into a 50 Ω load, and exhibits typical sensitivity of -114dBm.
The MAX7030 features separate transmit and receive pins (PAOUT and LNAIN) and provides an internal RF switch that can be used to connect the transmit and receive pins to a common antenna.
The MAX7030 transmit frequency is generated by a 16bit, fractional-N, phase-locked loop (PLL), while the receiver’s local oscillator (LO) is generated by an integer-N PLL.
This hybrid architecture eliminates the need for separate transmit and receive crystal reference oscillators because the fractional-N PLL is preset to be 10.
7MHz above the receive LO.
Retaining the fixed-N PLL for the receiver avoids the higher current-drain requirements of a fractional-N PLL and keeps the receiver current drain as low as possible.
All frequencygeneration components are integrated on-chip, and only a crystal, a 10.
7MHz IF filter, and a few discrete components are required to implemen...


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