DATA SHEET: MC1350P I.F. AMPL

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From: Paul Harden (pharden@aoc.nrao.edu)
Date: Fri Mar 03 1995 - 18:29:25 EST


[QRP Tech Note Series de NA5N]
DATA SHEET: MC1350P MONOLITHIC I.F. AMPLIFIER
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Manufactured by Motorola (Info from Motorola Linear/Interface Data Book)

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            ** PIN-OUT ** **FEATURES
                ______ * Power Gain: 50dB at 45MHz
  -OUTPUT --(1)-| |-(8)-- +OUTPUT * AGC Range: 60dB min
      Vcc --(2)-| |-(7)-- GND * Constant input & output
      GND --(3)-| |-(6)-- +INPUT admittance over AGC range
   -INPUT --(4)-| |-(5)-- AGC INPUT * Single volt. power supply
                ------

MC1350P 8-pin plastic DIP for 0 to 75C operation

**DESCRIPTION
The MC1350P monolithic IF amplifier is an integrated circuit featuring
wide range AGC for use as an IF amplifier in radio and TV over the
temperature range 0 to +75 deg. C. The MC1352 is similiar in design
but has a keyed-AGC amplifier as an integral part of the same chip.

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**ABSOLUTE MAXIMUM RATINGS
  Vcc Max. operating voltage +18 vdc
  Vagc AGC Supply voltage Not to exceed Vcc
  Vin Differential input voltage 5.0 vdc
  Pd Power dissipation 625mW (derate 5mW/deg.C >25C)
  Ta Operating temperature range
                        MC1350P 0C to +75C (degrees)

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**AC/DC ELECTRICAL CHARACTERISTICS at Ta=25C, Vcc=6v
       AGC range (5.0 to 7.0v) 60dB (min), 68dB (typ)
  Ap Power gain, 45MHz BW=4.5MHz 50dB
                 10.7MHz BW=350KHz 58dB
  Vo Differential output swing 20Vpp (with no AGC)
                                      8Vpp (with-30dB AGC)
  I1,7 Output current (pins 1+8) 5.6mA (typical)
  Is Total supply current 14mAdc(typ), 17mAdc (max)
  Pd Power dissipation 168mW (typ), 204mW (max)

[Following parameters for 10.7MHz]
  g11 Single ended input admittance 0.36mmhos
  g22 Output admittance 4.4umhos
  y12 Reverse transfer admittance <<1 umho
  y21 Forward transfer admittance 160mmhos
  Cin Single ended input cap. 7.2pF (typ)
  Co Differential output cap. 1.2pf (typ)

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**AGC ACTION
  (From curve, input AGV voltage vs. gain reduction in dB)
    Vagc input= 5.0v 5.5v 6.0v 6.5v 7.0v
Gain reduction= 0dB 8dB 16dB 45dB 68dB

[On the AGC response, its kinda sluggish from 5 to 6 volts, then
 linear from 6.0v to 6.7v, then flattens out >6.7v]

**DESIGN NOTES (From data sheet and personal experience)
1. Collector voltage for the output amplifier must be supplied through
   a center-tapped tuning coil to pins 1 and 8. [Pin 1 and 8 to the
   coil or transformer ends, the center tap to +Vcc or pin 2.]
2. [The MFJ 90xx QRP rig drawings are INCORRECT on the output of U2
   MC1350. Transformer T2 primary goes to pins 1 and 8, (not 1 and 2)
   while +10v Vcc goes to pin 2 (not pin 8 as shown) and to the
   transformer T2 center tap].
3. [AGC voltage less than 5.0v produces no gain reduction].
5. [In early 1995, single unit costs from mail order vendors for a
   MC1350P was about $2.00 each (Dalbani Corp.)].
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72/73 de NA5N (pharden@nrao.edu)


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