Philips SA606 User Manual
RF COMMUNICATIONS PRODUCTS
20 19 18 17 16 15 14 13 12 11
MIXER
IF
AMP
OSCILLATOR
EB
RSSI
+–
V
REG
LIMITER
QUAD
+–
AUDIO
SA606
Low-voltage high performance mixer FM
IF system
10987654321
Product Specification
Replaces data of October 26, 1993
RF Data Handbook
Philips Semiconductors
1997 Nov 07
Philips Semiconductors Product specification
SA606Low-voltage high performance mixer FM IF system
DESCRIPTION
The SA606 is a low-voltage high performance monolithic FM IF
system incorporating a mixer/oscillator, two limiting intermediate
frequency amplifiers, quadrature detector, logarithmic received
signal strength indicator (RSSI), voltage regulator and audio and
RSSI op amps. The SA606 is available in 20-lead SOL
(surface-mounted small outline large package) and 20-lead SSOP
(shrink small outline package).
The SA606 was designed for portable communication applications
and will function down to 2.7V. The RF section is similar to the
famous SA605. The audio and RSSI outputs have amplifiers with
access to the feedback path. This enables the designer to level
adjust the outputs or add filtering.
FEA TURES
•Low power consumption: 3.5mA typical at 3V
•Mixer input to >150MHz
•Mixer conversion power gain of 17dB at 45MHz
•XTAL oscillator ef fective to 150MHz (L.C. oscillator or external
oscillator can be used at higher frequencies)
•102dB of IF Amp/Limiter gain
•2MHz limiter small signal bandwidth
•Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a 90dB dynamic range
•Low external component count; suitable for crystal/ceramic/LC
filters
•Excellent sensitivity: 0.31µV into 50Ω matching network for 12dB
SINAD (Signal to Noise and Distortion ratio) for 1kHz tone with RF
at 45MHz and IF at 455kHz
•SA606 meets cellular radio specifications
•Audio output internal op amp
•RSSI output internal op amp
•Internal op amps with rail-to-rail outputs
PIN CONFIGURATION
D and DK Packages
RF IN+
RF IN- DECOUPLING
OSC
OUT
OSC
RSSI
V
CC
AUDIO FEEDBACK
AUDIO
RSSI FEEDBACK
QUADRATURE IN
Figure 1. Pin Configuration
1
2
3
4
IN
5
6
7
8
9
10
MIXER OUT
20
IF AMP DECOUPLING
19
IF AMP IN
18
IF AMP DECOUPLING
17
IF AMP OUT
16
GND
15
LIMITER IN
14
LIMITER DECOUPLING
13
LIMITER DECOUPLING
12
LIMITER OUT
11
•ESD protection: Human Body Model 2kV
Robot Model 200V
APPLICA TIONS
•Portable cellular radio FM IF
•Cordless phones
•Wireless systems
•RF level meter
•Spectrum analyzer
•Instrumentation
•FSK and ASK data receivers
•Log amps
•Portable high performance communication receiver
•Single conversion VHF receivers
SR00347
ORDERING INFORMATION
DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #
20-Pin Plastic Small Outline Large (SOL) package (Surface-mount) -40 to +85°C SA606D SOT163-1
20-Pin Plastic Shrink Small Outline Package (SSOP) (Surface-mount) -40 to +85°C SA606DK SOT266-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNITS
V
CC
T
STG
T
A
θ
JA
1997 Nov 07 853-1576 18665
Single supply voltage 7 V
Storage temperature range -65 to +150 °C
Operating ambient temperature range -40 to +85 °C
Thermal impedance D package
DK package
2
90
117
°C/W
Philips Semiconductors Product specification
SYMBOL
PARAMETER
TEST CONDITIONS
UNITS
SYMBOL
PARAMETER
TEST CONDITIONS
UNITS
SA606Low-voltage high performance mixer FM IF system
BLOCK DIAGRAM
20 19 18 17 16 15 14 13 12 11
MIXER
IF
AMP
OSCILLATOR
EB
+–
RSSI
V
REG
AUDIO
LIMITER
+–
QUAD
10987654321
SR00348
Figure 2. Block Diagram
DC ELECTRICAL CHARACTERISTICS
VCC = +3V, TA = 25°C; unless otherwise stated.
LIMITS
MIN TYP MAX
V
CC
I
CC
Power supply voltage range 2.7 7.0 V
DC current drain 3.5 4.2 mA
AC ELECTRICAL CHARACTERISTICS
TA = 25°C; VCC = +3V, unless otherwise stated. RF frequency = 45MHz + 14.5dBV RF input step-up; IF frequency = 455kHz; R17 = 2.4kΩ
and R18 = 3.3kΩ; RF level = -45dBm; FM modulation = 1kHz with ±8kHz peak deviation. Audio output with de-emphasis filter and C-message
weighted filter. 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
MIN TYP MAX
Mixer/Osc section (ext LO = 220mV
f
OSC
f
IN
Input signal frequency 150 MHz
Crystal oscillator frequency 150 MHz
Noise figure at 45MHz 6.2 dB
Third-order input intercept point (50Ω
source)
Conversion voltage gain Matched 14.5dBV step-up 13.5 17 19.5 dB
RF input resistance Single-ended input 8 kΩ
RF input capacitance 3.0 4.0 pF
Mixer output resistance (Pin 20) 1.25 1.5 kΩ
IF section
IF amp gain 50Ω source 44 dB
Limiter gain 50Ω source 58 dB
Input limiting -3dB, R
AM rejection 80% AM 1kHz 45 dB
Audio level Gain of two (2kΩ AC load) 70 120 160 mV
SINAD sensitivity IF level -110dBm 17 dB
RMS
= 2.4k, R
17a
)
f1 = 45.0; f2 = 45.06MHz
Input RF level = -52dBm
-9 dBm
50Ω source +2.5 dB
= 3.3k Test at Pin 18 -109 dBm
17b
1997 Nov 07
3
Philips Semiconductors Product specification
SYMBOL
PARAMETER
TEST CONDITIONS
UNITS
SA606Low-voltage high performance mixer FM IF system
AC ELECTRICAL CHARACTERISTICS (Continued)
LIMITS
MIN TYP MAX
THD Total harmonic distortion -35 -50 dB
S/N Signal-to-noise ratio No modulation for noise 62 dB
RF RSSI output, R9 = 2kΩ RF level = -118dBm 0.3 .80 V
RF level = -68dBm .70 1.1 1.80 V
RF level = -23dBm 1.20 1.8 2.50 V
RSSI range 90 dB
RSSI accuracy +1.5 dB
IF input impedance Pin 18 1.3 1.5 kΩ
IF output impedance Pin 16 0.3 kΩ
Limiter input impedance Pin 14 1.3 1.5 kΩ
Limiter output impedance Pin 11 0.3 kΩ
Limiter output voltage Pin 11 130 mV
RF/IF section (int LO)
Audio level 3V = VCC, RF level = -27dBm 120 mV
System RSSI output 3V = VCC, RF level = -27dBm 2.2 V
System SINAD sensitivity RF level = -117dBm 12 dB
RMS
RMS
CIRCUIT DESCRIPTION
The SA606 is an IF signal processing system suitable for second IF
systems with input frequency as high as 150MHz. The bandwidth of
the IF amplifier and limiter is at least 2MHz with 90dB of gain. The
gain/bandwidth distribution is optimized for 455kHz, 1.5kΩ source
applications. The overall system is well-suited to battery operation
as well as high performance and high quality products of all types.
The input stage is a Gilbert cell mixer with oscillator. Typical mixer
characteristics include a noise figure of 6.2dB, conversion gain of
17dB, and input third-order intercept of -9dBm. The oscillator will
operate in excess of 200MHz in L/C tank configurations. Hartley or
Colpitts circuits can be used up to 100MHz for xtal configurations.
Butler oscillators are recommended for xtal configurations up to
150MHz.
The output impedance of the mixer is a 1.5kΩ resistor permitting
direct connection to a 455kHz ceramic filter. The input resistance of
the limiting IF amplifiers is also 1.5kΩ. With most 455kHz ceramic
filters and many crystal filters, no impedance matching network is
necessary. The IF amplifier has 43dB of gain and 5.5MHz
bandwidth. The IF limiter has 60dB of gain and 4.5MHz bandwidth.
To achieve optimum linearity of the log signal strength indicator,
there must be a 12dB(v) insertion loss between the first and second
IF stages. If the IF filter or interstage network does not cause
12dB(v) insertion loss, a fixed or variable resistor or an L pad for
simultaneous loss and impedance matching can be added between
the first IF output (Pin 16) and the interstage network. The overall
gain will then be 90dB with 2MHz bandwidth.
The signal from the second limiting amplifier goes to a Gilbert cell
quadrature detector . One port of the Gilbert cell is internally driven
by the IF. The other output of the IF is AC-coupled to a tuned
quadrature network. This signal, which now has a 90
relationship to the internal signal, drives the other port of the
multiplier cell.
The demodulated output of the quadrature drives an internal op
amp. This op amp can be configured as a unity gain buffer, or for
simultaneous gain, filtering, and 2nd-order temperature
compensation if needed. It can drive an AC load as low as 5kΩ with
a rail-to-rail output.
A log signal strength completes the circuitry. The output range is
greater than 90dB and is temperature compensated. This log signal
strength indicator exceeds the criteria for AMPs or TACs cellular
telephone. This signal drives an internal op amp. The op amp is
capable of rail-to-rail output. It can be used for gain, filtering, or
2nd-order temperature compensation of the RSSI, if needed.
NOTE: dB(v) = 20log V
OUT/VIN
° phase
1997 Nov 07
4
Philips Semiconductors Product specification
SA606Low-voltage high performance mixer FM IF system
-25dB,
1500/50
50.5
3880
Ω PAD
SW9
-10dB,
50/50
Ω PAD
96.5
2430
32.6
C24 C22
FLT1
C23
71.5
SW8
20 19 18 17 16 15 14
IF
AMP
MIXER
OSCILLATOR
C4
C5
EXT.
LOC
OSC
44.545
SW3 SW4SW1
C8
C7
L2
C6
R7
30.5
R6
178
45.06
MHZ
C1
L1
C2
R4
51.1
SW2
R1
C3
R2
R3
45MHZ
MINI–CIRCUIT ZSC2–1B
Automatic Test Circuit Component List
C1
100pF NPO Ceramic
C2
390pF NPO Ceramic
C5
C6
C7
C8
C9
C10
C12
C14
C15
C17
C18
C21
C23
C25
C26
*NOTE: This value can be reduced when a battery is the power source.
10% Monolithic Ceramic
100nF +
22pF NPO Ceramic
1nF Ceramic
10.0pF NPO Ceramic
10% Monolithic Ceramic
100nF +
µF Tantalum (minimum) *
10
2.2µF
100nF +
10% Monolithic Ceramic
10pF NPO Ceramic
100nF +10% Monolithic Ceramic
10% Monolithic Ceramic
100nF +
100nF +
100nF +
100nF +
10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
10% Monolithic Ceramic
10% Monolithic Ceramic
Figure 3. SA606 45MHz Test Circuit (Relays as shown)
-29dB,
929/50
51.5
C21
X1
C20
SW7
R8
39.2
R9
Ω PAD
RSSI
+
–
RSSI
C26
R18
3.3k
R17
2.4k
C9
C10
V
REG
V
CC
IFT 1
C27
Flt 1
Flt 2
R10
R11
R12
R13
R14
R17
R18
R19
-10.6dB,
50/50
Ω PAD
96.5
71.5
32.8
C19
SW6 SW5
FLT2
C18
156k/50
C17
-36dB,
51.7
Ω PAD
1.3k
C16
C15
13 12 11
LIMITER
QUAD
+
–
AUDIO
10987654321
R13
R10
C27
R11
SW10
DEEMPHASIS
FILTER
”C” WEIGHTED
AUDIO
MEASUREMENT
CIRCUIT
AUDIO
2.2µF +
SW11
R14
C12
R12
C14
10% Monolithic Ceramic
Ceramic Filter Murata SFG455A3 or equiv
Ceramic Filter Murata SFG455A3 or equiv
455kHz (Ce = 180pF) Toko RMC–2A6597H
147–160nH Coilcraft UNI–10/142–04J08S
L1
L2
µH nominal
0.8
Toko 292CNS–T1038Z
44.545MHz Crystal ICM4712701
X1
R9
2kΩ +
1% 1/4W Metal Film
10kΩ +
1%
10kΩ +
1%
2kΩ +
1%
20kΩ +
1%
10kΩ +
1%
2.4kΩ +
5% 1/4W Carbon Composition
3.3kΩ
16kΩ
IFT1
R19
16k
SR00349
1997 Nov 07
5
Philips Semiconductors Product specification
SA606Low-voltage high performance mixer FM IF system
C26
R18
3.3k
R17
2.4k
C15
45MHz
INPUT
FLT1
C23
C21
20 19 18 17 16 14
IF
AMP
MIXER
OSCILLATOR
C1
L1
C2
C5
C8
C7
L2
C6
X1
+–
RSSI
C9
C10
15
V
REG
FLT2
R10
10k
C18
C17
13 12 11
LIMITER
QUAD
+–
R11
10k
C12
C27
2.2µF
C19
390pF
R19
11k
108764321 5 9
IFT1
C14
51pF NPO Ceramic
C1
220pF NPO Ceramic
C2
C5
C6
C7
C8
C9
C10
C12
C14
C15
C17
C18
C19
C21
* NOTE: This value can be reduced when a battery is the power source.
10% Monolithic Ceramic
100nF +
5-30pF trim cap
1nF Ceramic
10.0pF NPO Ceramic
10% Monolithic Ceramic
100nF +
µF Tantalum (minimum) *
10
2.2µF +10% Tantalum
100nF +
10% Monolithic Ceramic
10pF NPO Ceramic
100nF +10% Monolithic Ceramic
10% Monolithic Ceramic
100nF +
390pF +
10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
1997 Nov 07
RSSI
OUTPUT
V
CC
AUDIO
NE606D/DK Demo Board
Application Component List
C23
C26
C27
Flt 1
Flt 2
IFT 1
L1
L2
X1
R5
R10
R11
R17
R18
R19
100nF +
100nF +
2.2µF Tantalum
Ceramic Filter Murata SFG455A3 or equiv
Ceramic Filter Murata SFG455A3 or equiv
330µH TOKO 303LN-1130
.33µH TOKO SCB-1320Z
1.2
44.545MHz Crystal ICM4712701
Not Used in Application Board (see Note 8, pg 8)
8.2k +
10k +
2.4k +
3.3k +
11k +
10% Monolithic Ceramic
10% Monolithic Ceramic
µH
5% 1/4W Carbon Composition
5% 1/4W Carbon Composition
5% 1/4W Carbon Composition
5% 1/4W Carbon Composition
5% 1/4W Carbon Composition
Figure 4. SA606 45MHz Application Circuit
6
SR00350
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