LA75501V_07 SANYO [Sanyo Semicon Device], LA75501V_07 Datasheet - Page 9

• Manufacturer Part Number: LA75501V_07
• Description: For Use in TV/VTR Applications VIF/SIF Signal Processing IC
• Manufacturer: SANYO [Sanyo Semicon Device]

V28. VCO control sensitivity [β]
F1. 1st SIF conversion gain [V G ]
F2. 5.5MHz output level [So]
F3. 1st maximum input [Si max]
F4.F5. 1st SIF input resistance, input capacitance [R i (SIF1), C i (SIF1)]
S1. SIF Limiting sensitivity [V i (lim)]
S2.S4. FM detection output voltage, total harmonics distortion [V O (FM), THD]
S3. AM rejection ratio [AMR]
S5. SIF S/N [S/N (FM)]
(1) Apply the V CC voltage to the external AGC, IF AGC (pin 18).
(2) Apply the 3V to the external FLL, FLL (pin 10).
(3) Pick up the VCO oscillation frequency from the VIDEO output (A), GND, etc.
(4) f1 is taken as the frequency when 2.8V is applied to the APC pin (pin 9).
(1) Internal AGC
(2) fp = 38.9MHz CW;10mV (VIF input)
(3) measure the detection output level at test point C (5.5MHz) ····· V2
(4) V G = 20log
(1) Internal AGC
(2) fp = 38.9MHz CW; 10mV (VIF input)
(3) Measure the detection output level at test point C (5.5MHz). ····· So (mVrms)
(1) Internal AGC
(2) fp = 38.9MHz CW; 10mV (VIF input)
(3) Input level at which the detection output (5.5MHz) at test point C becomes So ±2dB. ····· Si max
(1) Referring to the Input Impedance Test Circuit, measure R i and C i with an impedance analyzer.
(1) Apply the V CC voltage to the external AGC, IF AGC (pin 18).
(2) fs = 5.5MHz fm = 400Hz ∆F = ±300kHz (SIF input)
(3) Set the SIF input level to 31.6mVrms and measure the level at test point D. ····· V1
(4) Lower the SIF input level and measure the input level which becomes V1. ····· 3dB.
(1) Apply the V CC voltage to the external AGC, IF AGC (pin 18).
(2) fs = 5.5MHz fm = 400Hz ∆f = ±30kHz
(3) Measure the FM detection output voltage, total harmonics distortion at test point D.
(1) External AGC (V 18 =V CC )
(2) fs = 5.5MHz fm = 400Hz AM = 30%
(3) Measure the output level at test point D. ····· VAM
(4) AMR = 20log
(1) External AGC (V 15 = V CC )
(2) fs = 5.5MHz NO MOD Vi = 31.6mVrms
(3) Measure the output level at test point D. ····· Vn
(4) S/N = 20log
And adjust the VCO coil so that the frequency becomes 38.9MHz.
In the same manner, f2 is taken as the frequency when 3.2V is applied to the APC pin (pin 9).
fs = 33.4MHz CW;500µV (1st SIF input) ····· V1
fs = 33.4MHz CW; 10mV (1st SIF input) ····· V1
fs = 33.4MHz CW; Variable (1st SIF input)
(SIF input Vi = 31.6mVrms)
(SIF input Vi = 31.6mVrms)
β = f2−
f1 − f2
400
V O (DET)
V2
V1
V O (DET)
VAM
Vn
dB
(kHz/mV)
dB
dB
LA75501V
No.A0224-9/10