Philips SA616D, SA616DK, SA616N Datasheet
SA616
Low-voltage high performance mixer
FM IF system
Product specification
Replaces data of 1993 Dec 15
1997 Nov 07
INTEGRATED CIRCUITS
IC17 Data Handbook
Philips Semiconductors Product specification
SA616Low-voltage high performance mixer FM IF system
2
1997 Nov 07 853-1676 18665
DESCRIPTION
The SA616 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 SA616 is available in 20-lead SSOP (shrink
small outline package).
The SA616 was designed for portable communication applications
and will function down to 2.7V . The RF section is similar to the
famous SA615. The audio and RSSI outputs have amplifiers with
access to the feedback path. This enables the designer to adjust
the output levels 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 IF amp/limiter small signal bandwidth
•Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a 80dB 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
•SA616 meets cellular radio specifications
•Audio output internal op amp
•RSSI output internal op amp
•Internal op amps with rail-to-rail outputs
•ESD protection: Human Body Model 2kV
Robot Model 200V
PIN CONFIGURATION
RF IN+
RF IN- DECOUPLING
OSC
OUT
OSC
IN
RSSI OUT
7
MIXER OUT
IF AMP IN
IF AMP OUT
GND
LIMITER IN
LIMITER OUT
V
CC
DK Package
AUDIO FEEDBACK
8
RSSI FEEDBACK 9
QUADRATURE IN 10
IF AMP DECOUPLING
AUDIO OUT
IF AMP DECOUPLING
LIMITER DECOUPLING
LIMITER DECOUPLING
2
1
3
4
5
6
20
19
18
17
16
15
14
13
12
11
SR00367
Figure 1. Pin Configuration
APPLICATIONS
•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
ORDERING INFORMATION
DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #
20-Pin Plastic Shrink Small Outline Package (SSOP) (Surface-mount) -40 to +85°C SA616DK SOT266-1
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNITS
V
CC
Single supply voltage 7 V
T
STG
Storage temperature range -65 to +150 °C
T
A
Operating ambient temperature range -40 to +85 °C
θ
JA
Thermal impedance DK package 117 °C/W
Philips Semiconductors Product specification
SA616Low-voltage high performance mixer FM IF system
1997 Nov 07
3
BLOCK DIAGRAM
20 19 18 17 16 15 14 13 12 11
10987654321
RSSI
IF
AMP
EB
V
REG
OSCILLATOR
LIMITER
MIXER
QUAD
+–
+–
AUDIO
SR00368
Figure 2. Block Diagram
DC ELECTRICAL CHARACTERISTICS
VCC = +3V, TA = 25°C; unless otherwise stated.
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNITS
V
CC
Power supply voltage range 2.7 7.0 V
I
CC
DC current drain 3.5 5.0 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
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNITS
Mixer/Osc section (ext LO = 220mV
RMS
)
f
IN
Input signal frequency 150 MHz
f
OSC
Crystal oscillator frequency 150 MHz
Noise figure at 45MHz 6.8 dB
Third-order input intercept point (50Ω
source)
f1 = 45.0; f2 = 45.06MHz
Input RF level = -52dBm
-9 dBm
Conversion power gain Matched 14.5dBV step-up 11 17 dB
50Ω source +2.5 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
17a
= 2.4k, R
17b
= 3.3k Test at Pin 18 -105 dBm
AM rejection 80% AM 1kHz 40 dB
Audio level Gain of two (2kΩ AC load) 60 120 mV
SINAD sensitivity IF level -110dBm 17 dB
THD T otal harmonic distortion -30 -45 dB
Philips Semiconductors Product specification
SA616Low-voltage high performance mixer FM IF system
1997 Nov 07
4
AC ELECTRICAL CHARACTERISTICS (Continued)
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNITS
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 2 V
RF level = -23dBm 1.0 1.8 2.50 V
RSSI range 80 dB
RSSI accuracy +2 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
RMS
RF/IF section (int LO)
Audio level 3V = VCC, RF level = -27dBm 120 mV
RMS
System RSSI output 3V = VCC, RF level = -27dBm 2.2 V
System SINAD sensitivity RF level = -117dBm 12 dB
CIRCUIT DESCRIPTION
The SA616 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
° phase
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
Philips Semiconductors Product specification
SA616Low-voltage high performance mixer FM IF system
1997 Nov 07
5
10987654321
20 19 18 17 16 15 14 13 12 11
RSSI
IF
AMP
MIXER
QUAD
MINI–CIRCUIT ZSC2–1B
AUDIO
C14
IFT1
C10
C9
C8
C7
C6
X1
R7
30.5
L2
SW3 SW4SW1
V
CC
EXT.
LOC
OSC
44.545
45MHZ
R3
R1
R2
SW2
C3
C4
R4
51.1
C5
C2
C1
L1
R6
178
R8
39.2
”C” WEIGHTED
AUDIO
MEASUREMENT
CIRCUIT
45.06
MHZ
50.5
2430
3880
96.5
32.6
71.5
C24 C22
C20
C19
C18
C15
C16
C17
FLT2
SW7
SW6 SW5
SW8
SW9
C23
C21
R17
2.4k
FLT1
-25dB,
1500/50
Ω PAD
-10dB,
50/50
Ω PAD
-29dB,
929/50
Ω PAD
-10.6dB,
50/50
Ω PAD
-36dB,
156k/50
Ω PAD
100pF NPO Ceramic
390pF NPO Ceramic
22pF NPO Ceramic
1nF Ceramic
10.0pF NPO Ceramic
10pF NPO Ceramic
100nF +
10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
2.2µF
100nF +
10% Monolithic Ceramic
15
µF Tantalum (minimum)
C21
C23
C27
Flt 1
Flt 2
IFT 1
L1
L2
X1
R9
R17
R10
R11
100nF +
10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
10kΩ +
1%
8.2kΩ +
1%
2.4kΩ +
5% 1/4W Carbon Composition
2kΩ +
1% 1/4W Metal Film
44.545MHz Crystal ICM4712701
0.8
µH nominal
Toko 292CNS–T1038Z
455kHz (Ce = 180pF) Toko RMC–2A6597H
Ceramic Filter Murata SFG455A3 or equiv
Ceramic Filter Murata SFG455A3 or equiv
100nF +
10% Monolithic Ceramic
147–160nH Coilcraft UNI–10/142–04J08S
C1
C2
C5
C6
C7
C8
C9
C10
C12
C14
C15
C17
C18
Automatic Test Circuit Component List
1.3k
51.7
71.5
96.5
32.8
51.5
OSCILLATOR
R12
2kΩ +
1%
R13
20kΩ +
1%
R14
10kΩ +
1%
R9
R12
DEEMPHASIS
FILTER
LIMITER
V
REG
SW10
SW11
R11
R13
R10
+
–
+
–
C12
AUDIO
R14
RSSI
16k
R19
C25
100nF +
10% Monolithic Ceramic
R18
R19
16kΩ
R18
3.3k
3.3kΩ
C26
C26
100nF +
10% Monolithic Ceramic
C27
OUT
OUT
SR00369
Figure 3. SA616 45MHz Test Circuit (Relays as shown)
Philips Semiconductors Product specification
SA616Low-voltage high performance mixer FM IF system
1997 Nov 07
6
108764321 5 9
20 19 18 17 16 14
13 12 11
15
RSSI
IF
AMP
MIXER
QUAD
RSSI
OUTPUT
AUDIO
C14
IFT1
C10
C9
C8
C7
C6
X1
L2
V
CC
C5
C2
C1
L1
C18
C15
C17
FLT2
C23
C21
R17
2.4k
FLT1
51pF NPO Ceramic
220pF NPO Ceramic
30pF trim cap
1nF Ceramic
10.0pF NPO Ceramic
10pF NPO Ceramic
100nF +
10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
2.2µF +10% Tantalum
100nF +
10% Monolithic Ceramic
15
µF Tantalum (minimum)
C26
C27
Flt 1
Flt 2
IFT 1
L1
L2
X1
R10
R5
100nF +
10% Monolithic Ceramic
2.2µF Tantalum
Not Used in Application Board (see Note 8, pg 8)
8.2k +
5% 1/4W Carbon Composition
44.545MHz Crystal ICM4712701
1.2
µH
Ceramic Filter Murata SFG455A3 or equiv
Ceramic Filter Murata SFG455A3 or equiv
C1
C2
C5
C6
C7
C8
C9
C10
C12
C14
C15
C17
C18
Application Component List
45MHz
INPUT
LIMITER
V
REG
OSCILLATOR
+–
+–
C12
C26
R18
3.3k
R19
11k
C27
R10
R11
10k
8.2k
C19
C23
390pF +
10% Monolithic Ceramic
100nF +
10% Monolithic Ceramic
R11
10k +
5% 1/4W Carbon Composition
R17
R18
2.4k +
5% 1/4W Carbon Composition
3.3k +
5% 1/4W Carbon Composition
R19
11k +
5% 1/4W Carbon Composition
SA616 DK demoboard
C19
390pF
.33µH TOKO SCB-1320Z
330µH TOKO 303LN-1130
C21
100nF +
10% Monolithic Ceramic
SR00370
Figure 4. SA616 45MHz Application Circuit
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