SA612A Datasheet, PDF (3/12 Pages) NXP Semiconductors – Double-balanced mixer and oscillator

Philips Semiconductors
Double-balanced mixer and oscillator
Product specification
SA612A
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
V_CC
T_STG
T_A
Maximum operating voltage
Storage temperature
Operating ambient temperature range SA612A
RATING
9
-65 to +150
-40 to +85
UNIT
V
°C
°C
AC/DC ELECTRICAL CHARACTERISTICS
T_A=25°C, V_CC = 6V, Figure 3
SYMBOL
PARAMETER
V_CC
f_IN
f_OSC
R_IN
C_IN
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 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 SA612A is designed for optimum low power performance.
When used with the SA614A as a 45MHz cordless phone/cellular
TEST CONDITION
RF_IN=-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 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 SA612A should be
appropriately scaled.
1997 Nov 07
3