SA604AD01 Datasheet, PDF (4/13 Pages) NXP Semiconductors – High performance low power FM IF system

Philips Semiconductors
High performance low power FM IF system
Product specification
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
SA604A
UNITS
MIN
TYP
MAX
Input limiting -3dB
Test at Pin 16
-92
dBm/50Ω
AM rejection
80% AM 1kHz
30
34
dB
THD
Recovered audio level
Recovered audio level
Total harmonic distortion
15nF de-emphasis
150pF de-emphasis
80
175
260
mV_RMS
530
mV_RMS
-34
-42
dB
S/N
Signal-to-noise ratio
No modulation for noise
73
dB
RF level = -118dBm
0
160
650
mV
RSSI output¹
RF level = -68dBm
1.9
2.65
3.1
V
RF level = -18dBm
4.0
4.85
5.6
V
RSSI range
R₄ = 100k (Pin 5)
90
dB
RSSI accuracy
R₄ = 100k (Pin 5)
±1.5
dB
IF input impedance
1.4
1.6
kΩ
IF output impedance
0.85
1.0
kΩ
Limiter input impedance
1.4
1.6
kΩ
Unmuted audio output resistance
58
kΩ
Muted audio output resistance
58
kΩ
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