Philips Semiconductors
Product specification
High performance low power FM IF system
SA604A
AC ELECTRICAL CHARACTERISTICS
Typical reading at T
A
= 25
°
C; V
CC
=
±6V,
unless otherwise stated.
IF frequency = 455kHz; IF level = -47dBm; 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
MIN
Input limiting -3dB
AM rejection
Recovered audio level
Recovered audio level
THD
S/N
Total harmonic distortion
Signal-to-noise ratio
No modulation for noise
RF level = -118dBm
RSSI output
1
RF level = -68dBm
RF level = -18dBm
RSSI range
RSSI accuracy
IF input impedance
IF output impedance
Limiter input impedance
Unmuted audio output resistance
Muted audio output resistance
R
4
= 100k (Pin 5)
R
4
= 100k (Pin 5)
1.4
0.85
1.4
0
1.9
4.0
Test at Pin 16
80% AM 1kHz
15nF de-emphasis
150pF de-emphasis
-34
30
80
SA604A
TYP
-92
34
175
530
-42
73
160
2.65
4.85
90
±1.5
1.6
1.0
1.6
58
58
650
3.1
5.6
260
MAX
dBm/50Ω
dB
mV
RMS
mV
RMS
dB
dB
mV
V
V
dB
dB
kΩ
kΩ
kΩ
kΩ
kΩ
UNITS
NOTE:
1. SA604 data sheets refer to power at 50Ω input termination; about 21dB less power actually enters the internal 1.5k input.
SA604 (50)
SA604A (1.5k)/SA605 (1.5k
-97dBm
-118dBm
-47dBm
-68dBm
+3dBm
-18dBm
The SA605 and SA604A are both derived from the same basic die. The SA605 performance plots are directly applicable to the SA604A.
1997 Nov 07
4
PHILIPS [ NXP SEMICONDUCTORS ]
