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NRF9E5-EVKIT433 Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers |
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NRF9E5-EVKIT433 Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers |
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8 / 104 page  PRODUCT SPECIFICATION nRF9 E5 Single Chip Transceiver with Embedded Microcontroller and ADC Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone +4772898900 - Fax +4772898989 Revision: 1.1 Page 8 of 104 June 2004 1.8 AD Converter The nRF9E5 AD converter has up to 10-bit dynamic range and linearity with a conversion rate of 80 ksps used at the Nyquist rate. The reference for the AD converter is software selectable between the AREF input and an internal 1.22V bandgap reference. The converter has 5 inputs selectable by software. Selecting one of the inputs 0 to 3 will convert the voltage on the respective AIN0 to AIN3 pin. Input 4 enables software to monitor the nRF9E5 supply voltage by converting an internal input that is VDD/3 with the 1.22V internal reference selected. The AD converter is typically used in a start/stop mode. The sampling time is then under software control. The converter is by default configured as 10 bits. For special requirements, the AD converter can be configured by software to perform 6, 8 or 12 bit conversions. The converter may also be used in differential mode with AIN0 used as negative input and one of the other 3 external inputs used as noninverting input. 1.9 Radio Transceiver The transceiver part of the circuit has identical functionality to the nRF905 single chip RF transceiver. It is accessed through an internal parallel port and / or an internal SPI. The data ready, carrier-detect and address match signals can be programmed as interrupts to the microcontroller or polled via a GPIO port. The nRF905 is a radio transceiver for the 433/868/915 MHz ISM bands. The transceiver consists of a fully integrated frequency synthesizer, a power amplifier, a modulator and a receiver unit. Output power and frequency channels and other RF parameters are easily programmable by use of the on chip SPI interface to the nRF905 core. RF current consumption is only 11 mA in TX mode (output power -10dBm) and 12.5 mA in RX mode. For power saving the transceiver can be turned on / off under software control. This document should be read in conjunction with the nRF905 datasheet. |
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