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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 (Power down: I11 & I16 = 0) Supply Current (Enable [Pin 11] to VCC thru 30 k, I16 = 0) Total Supply Current (Transmit Mode) (Imod = 2.0 mA; fo = 320 MHz) Differential Output Power (fo = 320 MHz; Vref [Pin 9] = 500 mVp–p; fo = N x fref) Imod = 2.0 mA (see Figures 7 and 8) Imod = 0 mA Hold–in Range (± ∆fref x N) MC13175 (see Figure 7) MC13176 (see Figure 8) Phase Detector Output Error Current MC13175 MC13176 Oscillator Enable Time (see Figure 27) Amplitude Modulation Bandwidth (see Figure 29) Spurious Outputs (Imod = 2.0 mA) Spurious Outputs (Imod = 0 mA) Maximum Divider Input Frequency Maximum Output Frequency
* For testing purposes, VCC is ground (see Figure 2).
Pin – – – 13 & 14
Symbol IEE1 IEE2 IEE3 Pout
Min – 0.5 –18 – 39
Typ – –14 – 34
Max – – –
Unit µA mA mA dBm
2.0 – 13 & 14 ± ∆f H 3.5 4.0 7 lerror 20 22 11 & 8 16 13 & 14 13 & 14 – 13 & 14 tenable BWAM Pson Psoff fdiv fo – – – – – –
+ 4.7 – 45 6.5 8.0 25 27 4.0 25 – 50 – 50 950 950
– – MHz – – µA – – – – – – – – ms MHz dBc MHz
Figure 2. 320 MHz Test Circuit
Imod Osc Tank VEE (1) Coilcraft 150–03J0 8 1 2 3 0.098µ 4 5 6 27p 10k 7 8 f/N 16 15 14 13 12 11 10 9 0.01µ 0.82µ (3) MC13176 Crystal Fundamental VCC 10 MHz VCC (1) 30k 0.1µ Ireg. enable 51 10k 0.1µ 51 0.01µ RFout 1
0.1µ
0.01µ RFout 2
0.1µ
15p (MC13176)
10p (MC13175)
2.2k
MC13175–30p MC13176–33p
NOTES: 1. VCC is ground; while VEE is negative with respect to ground. 2. Pins 5, 10 and 15 are brought to the circuit side of the PCB via plated through holes. They are connected together with a trace on the PCB and each Pin is decoupled to VCC (ground). 3. Recommended source is Coilcraft “slot seven” inductor, part number 7M3–821.
MC13175 1.0k Crystal 3rd Overtone 40 MHz
2
MOTOROLA RF/IF DEVICE DATA
MC13175 MC13176
PIN FUNCTION DESCRIPTIONS
Pin 1&4 Symbol Osc 1, Osc 4 10k 1 0sc 1 Internal Equivalent Circuit VCC 10k 4 Osc 4 Description/External Circuit Requirements CCO Inputs The oscillator is a current controlled type. An external oscillator coi.