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ADF7025BCPZ-RL Folha de dados(PDF) 3 Page - Analog Devices

Nome de Peças ADF7025BCPZ-RL
Descrição Electrónicos  High Performance ISM Band Transceiver IC
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

ADF7025BCPZ-RL Folha de dados(HTML) 3 Page - Analog Devices

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ADF7025
Rev. A | Page 3 of 44
GENERAL DESCRIPTION
The ADF7025 is a low power, highly integrated FSK transceiver.
It is designed for operation in the license–free ISM bands of
433 MHz, 863 MHz to 870 MHz, and 902 MHz to 928 MHz.
The ADF7025 can be used for applications operating under the
European ETSI EN300-220 or the North American FCC (Part 15)
regulatory standards. The ADF7025 is intended for wideband,
high data rate applications with deviation frequencies from
100 kHz to 750 kHz and data rates from 9.6 kbps to 384 kbps.
A complete transceiver can be built using a small number of
external discrete components, making the ADF7025 very
suitable for price-sensitive and area-sensitive applications.
The transmit section contains a VCO and low noise
Fractional-N PLL with output resolution of <1 ppm. The VCO
operates at twice the fundamental frequency to reduce spurious
emissions and frequency pulling problems.
The transmitter output power is programmable in 0.3 dB steps
from −16 dBm to +13 dBm. The transceiver RF frequency, channel
spacing, and modulation are programmable using a simple 3-wire
interface. The device operates with a power supply range of 2.3 V
to 3.6 V and can be powered down when not in use.
A zero-IF architecture is used in the receiver, minimizing power
consumption and the external component count, while avoiding
the need for image rejection. The baseband filter (low-pass) has
programmable bandwidths of ±300 kHz, ±450 kHz, and ±600 kHz.
A high-pass pole at ~60 kHz eliminates the problem of dc offsets
that is characteristic of zero-IF architecture.
The ADF7025 supports a wide variety of programmable
features, including Rx linearity, sensitivity, and filter bandwidth,
allowing the user to trade off receiver sensitivity and selectivity
against current consumption, depending on the application.
An on-chip ADC provides readback of an integrated tempera-
ture sensor, an external analog input, the battery voltage, or the
RSSI signal, which provides savings on an ADC in some
applications. The temperature sensor is accurate to ±10°C over
the full operating temperature range of −40°C to +85°C. This
accuracy can be improved by doing a 1-point calibration at
room temperature and storing the result in memory.


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