MC13175 Datasheet, PDF (1/17 Pages) Motorola, Inc – UHF FM/AM TRANSMITTER

Order this document by MC13175/D
UHF FM/AM Transmitter
The MC13175 and MC13176 are one chip FM/AM transmitter
subsystems designed for AM/FM communication systems. They include a
Colpitts crystal reference oscillator, UHF oscillator, ÷ 8 (MC13175) or ÷ 32
(MC13176) prescaler and phase detector forming a versatile PLL system.
Targeted applications are in the 260 to 470 MHz band and 902 to 928 MHz
band covered by FCC Title 47; Part 15. Other applications include local
oscillator sources in UHF and 900 MHz receivers, UHF and 900 MHz video
transmitters, RF Local Area Networks (LANs), and high frequency clock
drivers. The MC13175/76 offer the following features:
• UHF Current Controlled Oscillator
• Uses Easily Available 3rd Overtone or Fundamental Crystals for
Reference
• Fewer External Parts Required
• Low Operating Supply Voltage (1.8 to 5.0 Vdc)
• Low Supply Drain Currents
• Power Output Adjustable (Up to +10 dBm)
• Differential Output for Loop Antenna or Balun Transformer Networks
• Power Down Feature
• ASK Modulated by Switching Output On and Off
• (MC13175) fo = 8 x fref; (MC13176) fo = 32 x fref
MC13175
MC13176
UHF FM/AM
TRANSMITTER
SEMICONDUCTOR
TECHNICAL DATA
16
1
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16)
Figure 1. Typical Application as 320 MHz AM Transmitter
Osc
Tank
1
2
Coilcraft
150–05J08
3
0.165µ
4
(2)
VEE
0.1µ
5
6
150p
1.0k
7
8
AM Modulator
1.3k
16
S2
0.01µ
15
VEE
(1)
14
150p
Z = 50Ω
RFout
f/N
13
RFC1
SMA
12
VCC
11
10 ^VEE
9
27k ^S1
0.1µ
100p
(MC13176)
VCC
30p
(MC13175)
MC13175–30p
MC13176–180p
MC13175
Crystal
3rd Overtone
40.0000 MHz
0.82µ
1.0k
0.01µ
MC13176
(3) Crystal
Fundamental
10 MHz _VCC
NOTES: 1. 50 Ω coaxial balun, 1/10 wavelength at 320 MHz equals 1.5 inches.
2. Pins 5, 10 & 15 are ground and connected to VEE which is the component/DC ground plane
2. side of PCB. These pins must be decoupled to VCC; decoupling capacitors should be placed
2. as close as possible to the pins.
3. The crystal oscillator circuit may be adjusted for frequency with the variable inductor
3. (MC13175); recommended source is Coilcraft “slot seven” 7mm tuneable inductor, Part
3. #7M3–821. 1.0k resistor. Shunting the crystal prevents it from oscillating in the fundamental
3. mode.
PIN CONNECTIONS
Osc 1 1
NC 2
NC 3
Osc 4 4
VEE 5
ICont 6
PDout 7
Xtale 8
16 Imod
15
Out
Gnd
14 Out 2
13 Out 1
12 VCC
11 Enable
10 ^Reg.
Gnd
9 Xtalb
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC13175D
TA = – 40° to +85°C
MC13176D
SO–16
SO–16
MOTOROLA RF/IF DEVICE DATA
© Motorola, Inc. 1998
Rev 1.1
1