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Order this document by MC13175/D
MC13175 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
MC13176
UHF FM/AM TRANSMITTER
SEMICONDUCTOR TECHNICAL DATA
• • • • • • • • •
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
D SUFFIX PLASTIC PACKAGE CASE 751B (SO–16)
16 1
Figure 1. Typical Application as 320 MHz AM Transmitter
AM Modulator Osc Tank
1 2
0.165µ
16 15
VEE
1.3k 0.01µ S2
PIN CONNECTIONS
Coilcraft 150–05J08
(1) 150p Z = 50Ω RFout SMA
3 4
f/N
14 13
RFC1
Osc 1 1 NC 2 NC 3 Osc 4 4
16 Imod 15 Out Gnd
(2) VEE
0.1µ 150p
5 6
1.0k
12 11 10 9
VEE 0.1µ 27k
VCC
14 Out 2 13 Out 1 12 VCC 11 Enable 10 Reg. Gnd 9 Xtalb
S1
7 8
VEE 5 ICont 6 PDout 7
100p (MC13176) VCC
30p (MC13175)
MC13175–30p MC13176–180p MC13175 Crystal 3rd Overtone 40.0000 MHz
0.01µ 0.82µ 1.0k
Xtale 8
(3)
MC13176 Crystal Fundamental 10 MHz
VCC
NOTES: 1. 2. 2. 2. 3. 3. 3. 3.
50 Ω coaxial balun, 1/10 wavelength at 320 MHz equals 1.5 inches. Pins 5, 10 & 15 are ground and connected to VEE which is the component/DC ground plane side of PCB. These pins must be decoupled to VCC; decoupling capacitors should be placed as close as possible to the pins. The crystal oscillator circuit may be adjusted for frequency with the variable inductor (MC13175); recommended source is Coilcraft “slot seven” 7mm tuneable inductor, Part #7M3–821. 1.0k resistor. Shunting the crystal prevents it from oscillating in the fundamental mode.
ORDERING INFORMATION
Device MC13175D MC13176D Operating Temperature Range TA = – 40° to +85°C Package SO–16 SO–16
© Motorola, Inc. 1998
Rev 1.1
MOTOROLA RF/IF DEVICE DATA
1
MC13175 MC13176
MAXIMUM RATINGS ( TA = 25°C, unless otherwise noted.)
Rating Power Supply Voltage Operating Supply Voltage Range Junction Temperature Operating Ambient Temperature Storage Temperature Symbol VCC VCC TJ TA Tstg Value 7.0 (max) 1.8 to 5.0 +150 – 40 to + 85 – 65 to +150 Unit Vdc Vdc °C °C °C
ELECTRICAL CHARACTERISTICS (Figure 2; VEE = – 3.0 Vdc, TA = 25°C, unless otherwise noted.)*
Characteristic Supply Current (P.