SA612AD 데이터 시트보기 (PDF) - Philips Electronics
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SA612AD Datasheet PDF : 8 Pages
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Philips Semiconductors
Double-balanced mixer and oscillator
Product specification
NE/SA612A
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
VCC
TSTG
TA
Maximum operating voltage
Storage temperature
Operating ambient temperature range
NE
SA
AC/DC ELECTRICAL CHARACTERISTICS
TA=25°C, VCC = 6V, Figure 3
SYMBOL
PARAMETER
VCC
fIN
fOSC
RIN
CIN
Power supply voltage range
DC current drain
Input signal frequency
Oscillator frequency
Noise figured at 45MHz
Third-order intercept point at 45MHz
Conversion gain at 45MHz
RF input resistance
RF input capacitance
Mixer output resistance
DESCRIPTION OF OPERATION
The NE/SA612A is a Gilbert cell, an oscillator/buffer, and a
temperature compensated bias network as shown in the equivalent
circuit. The Gilbert cell is a differential amplifier (Pins 1 and 2) which
drives a balanced switching cell. The differential input stage
provides gain and determines the noise figure and signal handling
performance of the system.
The NE/SA612A is designed for optimum low power performance.
When used with the NE614A as a 45MHz cordless phone/cellular
RATING
9
-65 to +150
0 to +70
-40 to +85
UNIT
V
°C
°C
TEST CONDITION
RFIN=-45dBm
(Pin 4 or 5)
LIMITS
Min
Typ
Max
4.5
8.0
2.4
3.0
500
200
5.0
-13
14
17
1.5
3
1.5
UNIT
V
mA
MHz
MHz
dB
dBm
dB
kΩ
pF
kΩ
radio 2nd IF and demodulator, the NE/SA612A is capable of
receiving -119dBm signals with a 12dB S/N ratio. Third-order
intercept is typically -15dBm (that’s approximately +5dBm output
intercept because of the RF gain). The system designer must be
cognizant of this large signal limitation. When designing LANs or
other closed systems where transmission levels are high, and
small-signal or signal-to-noise issues not critical, the input to the
NE/SA612A should be appropriately scaled.
1990 Sep 17
2
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