No. 5689-2/14
LA7790M
Parameter Symbol Conditions Ratings Unit
Maximum power supply voltage V
CC
max Pins 1, 10, and 24 7 V
Circuit voltage Vmax Pins 1, 12, 17, 20, 21, and 23 V
CC
V
Circuit current
I
11
Output lead-in current
1 mA
I
19
2 mA
Allowable power dissipation Pd max Ta ≤ 54°C 650 mW
Operating ambient temperature Topr –20 to +70 °C
Storage temperature Tstg –55 to +150 °C
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions
Ratings
Unit
min typ max
Current drain
Circuit current 1 I
1
With no signal, pin 1 26 33 44 mA
Circuit current 2 I
24
+ I10With no signal, pins 24 and 10 44 55 73 mA
Modulator fo: f(V19) = 25 MHz
Output frequency range f
(V19)
5 70 MHz
Output signal level V
19(DSB)
Note 1: V20= V23= GND,
–7 –4 –2 dBm
V
12
= V17= V21= VCC, S1 = A
Output harmonic distortion
V
19(HD2)
Note 2: V20= V23= GND, 40 dB
V
19(HD3)V12
= V17= V21= VCC, S1 = A 35 dB
Output secondary harmonic distortion V
19(2fo)
Note 3: V20= V23= GND,
20 dB
V
12
= V17= V21= VCC, S1 = A
Output tertiary harmonic distortion V
19(3fo)
Note 3: V20= V23= GND,
8 dB
V
12
= V17= V21= VCC, S1 = A
Carrier suppression ratio V
19(fo)
Note 4: V20= V23= GND,
30 dB
V
12
= V17= V21= VCC, S1 = A
Sideband suppression ratio V
19(SSB)
Note 5: V20= V23= GND,
30 dB
V
12
= V17= V21= VCC, S1 = A
I input level V
4.5
V
4.5
= |V4— V5| 500 mVp-p
Q input level V
8.9
V
8.9
= |V8— V9| 500 mVp-p
I input DC voltage V
4, 5
External DC bias voltage 1.9 2.1 2.3 V
Q input DC voltage V
8, 9
External DC bias voltage 1.9 2.1 2.3 V
Reference voltage V
6
Internal DC bias voltage 1.9 2.1 2.3 V
Variable attenuator
Minimum gain control voltage V
21
V12= V17= VCC, V20= V23= GND, S1 = A 0 0.5 V
Gain range V
19(GR)
Note 6: V20= V23= GND, V12= V17= VCC,
45 dB
S1 = A, V
21
= VCC→ 0.5 V
Modulator output impedance R
19
V12= V17= V21= VCC,
80 120 160 Ω
V
20
= V23= GND, S1 = A
VCO
Oscillator frequency range f
(osc)
V12= V17= V21= VCC,
20 280 MHz
V
20
= V23= GND, S1 = A
VCO output level
V
11(fo)
V12= V17= V21= VCC,
500 700 900 mVp-p
V
20
= V23= GND, S1 = A
VCO output impedance
R
11
V12= V17= V21= VCC,
200 300 400 Ω
V
20
= V23= GND, S1 = A
Band switch
Band switch 1 “H” level
V
17H
Note 7: V12= V21= VCC,
4 V
f(V19) = 25 MHz V
20
= V23= GND, S1 = A
Band switch 1 “L” level
V
17L
Note 7: V12= V21= VCC,
1 V
f(V19) = 12.5 MHz V
20
= V23= GND, S1 = A
Operating Characteristics at Ta = 25°C, VCC= 5.0 V
Parameter Symbol Conditions Ratings Unit
Operating power supply voltage V
CC
op Pins 1, 10, and 24 4.5 to 5.5 V
Recommended Conditions at Ta = 25°C
Continued on next page.