NEC's 900 MHz SILICON
MMIC DOWN CONVERTER
UPC1686GV
FEATURES
INTERNAL BLOCK DIAGRAM
• WIDE-BAND OPERATION: DC to 890 MHz
• DOUBLE BALANCED MIXER:
Low Distortion
Low Oscillator Radiation
OSC base
(bypass)
1
2
3
4
OSC
8
7
6
5
RF input
• BALANCED AMPLIFIER FOR VOLTAGE
CONTROLLED OSCILLATORS:
Up to UHF Frequency
OSC base
(feedback)
OSC
Buffer
RF input
(bypass)
• SINGLE ENDED PUSH-PULL IF AMPLIFIER:
Constant Resistive Impedance
OSC collector
(coupling)
• SWITCHABLE AS MIXER OR IF AMP
GND
• SMALL PACKAGE: 8 Pin SSOP
IF Pre IF Main
Amp Amp
DESCRIPTION
Reg.
Vcc
IF output
NEC's UPC1686GV is a silicon monolithic integrated circuit
designed as a wide-band mixer/oscillator/IF amp suitable for
VHF TV/CATV tuners. Device features include: 20 dB gain
from 55 to 890 MHz and an output power of +10 dBm at
saturation. The device is available in an 8 pin SSOP package.
The nominal output impedance of the device is 75 ohms.
Mix
ELECTRICAL CHARACTERISTICS (TA = 25°C, VCC = 5 V)
PART NUMBER
PACKAGE OUTLINE
UPC1686GV
S08
TEST
SYMBOLS
PARAMETERS AND CONDITIONS
Circuit Current, no input signal
Conversion Gain1
UNITS
MIN
TYP
MAX
CIRCUIT
ICC
mA
25
38
48
Fig. 1
CG
RF = 55 MHz, IF = 44 MHz
dB
dB
dB
dB
15
15.5
16
19
19.5
20
22
22.5
23
Fig. 1
Fig. 1
RF = 200 MHz, IF = 50 MHz
RF = 440 MHz, IF = 50 MHz
RF = 890 MHz, IF = 50 MHz
20
NF
Noise Figure2 at RF = 55 MHz, IF = 44 MHz
RF = 200 MHz, IF = 50 MHz
dB
dB
dB
11
11
12
14
14
15
RF = 440 MHz, IF = 50 MHz
CM
1% Cross modulation3 at IF = 50 MHz, 75 Ω Open Terminal,
RF = 55 to 470 MHz
dBµ
94
Fig. 1
Fig. 1
PSAT
fSTB
Saturated Output Power4
dBm
+10
Oscillator Frequency Stability at VCC ± 10%
OSC f = 100 to 490 MHz
kHz
kHz
±100
Fig. 2
Fig. 2
fDRIFT
VOSC
Oscillation Frequency Drift, OSC f = 100 to 490 MHz
100
Oscillation Start Voltage
OSC f = 100 to 490 MHz
V
3.0
1.3
Fig. 2
Fig. 1
VSWR
Notes:
IF Output
1.5
1. PRFin = -40 dBm, POSC = -5 dBm
2. POSC = -5 dBm
3. Undesired = Desired ± 12 MHz, 30% 100 kHz AM S/I Ratio = 46 dB
4. PRFin = 0 dBm, POSC = -5 dBm
California Eastern Laboratories