SA615(1997) View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
SA615 Datasheet PDF : 14 Pages
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Philips Semiconductors
High performance low power mixer FM IF system
Product specification
SA615
AC ELECTRICAL CHARACTERISTICS
TA = 25°C; VCC = +6V, unless otherwise stated. RF frequency = 45MHz + 14.5dBV RF input step–up; IF frequency = 455kHz; R17 = 5.1k; RF
level = –45dBm; FM modulation = 1kHz with +8kHz peak deviation. Audio output with C-message weighted filter and de-emphasis capacitor.
Test circuit Figure 3. The parameters listed below are tested using automatic test equipment to assure consistent electrical characterristics.
The limits do not represent the ultimate performance limits of the device. Use of an optimized RF layout will improve many of the listed
parameters.
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
SA615
UNITS
MIN
TYP
MAX
Mixer/Osc section (ext LO = 300mV)
fIN
fOSC
Input signal frequency
Crystal oscillator frequency
Noise figure at 45MHz
500
MHz
150
MHz
5.0
dB
Third-order input intercept point
f1 = 45.00; f2 = 45.06MHz
-12
dBm
Conversion power gain
Matched 14.5dBV step-up
8.0
13
dB
RF input resistance
RF input capacitance
50Ω source
Single-ended input
-1.7
dB
3.0
4.7
kΩ
3.5
4.0
pF
Mixer output resistance
IF section
(Pin 20)
1.25
1.50
kΩ
IF amp gain
Limiter gain
Input limiting -3dB, R17 = 5.1k
AM rejection
50Ω source
50Ω source
Test at Pin 18
80% AM 1kHz
39.7
dB
62.5
dB
-109
dBm
25
33
43
dB
Audio level, R10 = 100k
Unmuted audio level, R11 = 100k
SINAD sensitivity
15nF de-emphasis
150pF de-emphasis
RF level -118dB
60
150
260
mVRM
S
530
mV
12
dB
THD Total harmonic distortion
-30
-42
dB
S/N Signal-to-noise ratio
IF RSSI output, R9 = 100kΩ1
No modulation for noise
IF level = -118dBm
IF level = -68dBm
68
dB
0
160
800
mV
1.7
2.5
3.3
V
RSSI range
RSSI accuracy
IF input impedance
IF output impedance
Limiter intput impedance
Unmuted audio output resistance
Muted audio output resistance
RF/IF section (int LO)
IF level = -18dBm
R9 = 100kΩ Pin 16
R9 = 100kΩ Pin 16
3.6
4.8
80
+2
1.40
1.6
0.85
1.0
1.40
1.6
58
58
5.8
V
dB
dB
kΩ
kΩ
kΩ
kΩ
kΩ
Unmuted audio level
System RSSI output
4.5V = VCC, RF level = -27dBm
4.5V = VCC, RF level = -27dBm
450
mVRM
S
4.3
V
NOTE:
1. The generator source impedance is 50Ω, but the SA615 input impedance at Pin 18 is 1500Ω. As a result, IF level refers to the actual signal
that enters the SA615 input (Pin 8) which is about 21dB less than the ”available power” at the generator.
1997 Nov 07
4
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