NRF0433 Datasheet, PDF (8/14 Pages) List of Unclassifed Manufacturers – Single chip 433MHz RF Transceiver

PRODUCT SPECIFICATION
nRF0433 Single chip RF Transceiver
Output power and DC power supply current versus external bias resistor value is
shown in table 5 for a differential load of 400Ω.
Bias resistor connected
between VDD and RF_PWR
[kΩ]
1000 / Open
150
100
68
RF output power
@ 400Ω, differential
[dBm]
10
4
-2
-12
Power supply current,
I_DD
[mA]
46
37
33
31
Table 5. RF output power settings.
PLL loop filter
The PLL synthesizer loop filter is an external, single-ended second order lag/lead filter.
The recommended filter component values are: C1 = 270 pF, C2 =5.6 nF, R1 = 27 kΩ.
VCO inductor
The on-chip voltage controlled oscillator (VCO) needs an external 22nH inductor
connected between the VCO1 and VCO2 pins to operate. This inductor should be a
high quality chip inductor, Q > 45 @ 433 MHz, with a maximum tolerance of ± 3%,
see table 6. See also page 9 for PCB layout guidelines.
Vendors
Predan
Pulse
Coilcraft
muRata
WWW address
http://www.predan.com
http://www.pulseeng.com
http://www.coilcraft.com
http://www.murata.com
Part. no., 22 nH inductors, 0805
CS0805-220G
PE-0805CD220GTT
PE-0805CM220GTT
0805CS-220XGBC
0805HT-22NTGBC
LQW1608A22NG00
Table 6. Vendors and part. no. for suitable 22nH inductors.
Transmit/receive mode selection
TXEN is a digital input for selection of transmit or receive mode.
TXEN = “1” selects transmit mode.
TXEN = “0” selects receive mode.
D_IN (data input) and D_OUT (data output)
The DIN pin is the input to the digital modulator of the transmitter. The input signal to
this pin should be standard CMOS logic level at data rates up to 9600 bit/s.
The demodulated digital output data appear at the DOUT pin at standard CMOS logic
levels. f₀ + ∆f → “1”, f₀ - ∆f → “0”.
Frequency difference between transmitter and receiver
For optimum performance, the total frequency difference between transmitter and
receiver should not exceed 70 ppm (30 kHz). This yields a crystal stability requirement
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway -
Revision: 3.2
Page 8 of 14
Phone [phone] - Fax [phone]
February 2000