RF105 Просмотр технического описания (PDF) - Conexant Systems
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RF105 Datasheet PDF : 12 Pages
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RF105
900 MHz Digital Spread Spectrum Transceiver
Interface Description
Table 2. Pin Description
Pin Name
1 GND1
2 CLK
3 FREF
4 DATA
5 TXREF
6 VCC1
7 TXD
8 GND2
9 RXEN
10 LNAATTN
11 LNAIN
12 GND3
13 GND4
14 MODSET
15 RFO1
16 RFO2
17 TXEN
18 MIXBPC
19 GMCRES
20 PS1
21 PS2
22 GCREF
23 GC
24 GND5
Description
Pin Name
Ground
25 GND6
Synthesizer programming clock input
26 VCC2
Reference frequency input for synthesizer
Synthesizer programming data input
Reference for TX data input, ac-coupled to ground
27 RX Q–
28 RX Q+
29 RX I–
Supply for LNA and RX mixer
Baseband TX data input
LNA emitter ground
30 RX I+
31 VCC3
32 SR Q–
Receive enable
33 SR Q+
LNA attenuation control
0 = high-gain mode, 1 = low-gain mode
LNA RF input
Ground
34 SR I–
35 SR I+
36 GND7
Ground
37 GND8
Input to set TX modulator gain
Differential TX RF output
Differential TX RF output, inverse polarity
38 NC
39 VCC4
40 CON
Transmit enable
41 VCOBPC
Bypass capacitor for RX mixer bias
42 GND9
Resistor to set cutoff frequency of channel selection filter 43 NC
Modulator power control input (see Table 3)
44 CHPO
Modulator power control input (see Table 3)
45 VCC5
Reference for gain control input connected to ground
46 SYNTHEN
Baseband variable gain amplifier control input
47 STROBE
Ground
48 GND10
Description
Ground
Supply for baseband outputs
Q channel baseband differential outputs
I channel baseband differential outputs
Supply for baseband circuits
Q channel DC offset cancellation servo external
capacitor connections
I channel DC offset cancellation servo external capacitor
connections
Ground
Ground
No connect
Supply for VCO
VCO control input
Bias bypass capacitor for VCO bias
Ground for VCO
No connect
Charge pump output
Supply for synthesizer
Synthesizer enable
Synthesizer programming load enable
Ground
6
Conexant
W117, Rev. B
Conexant Proprietary Information
September 28, 1999
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