SA605D
Philips Semiconductors
SA605
High performance low power mixer FM IF
system
Product specification
Replaces data of November 3, 1992
1997 Nov 07
RF COMMUNICATIONS PRODUCTS
RF Communications Handbook
Philips Semiconductors Product specification
SA605High performance low power mixer FM IF system
2
1997 Nov 07 853-1401 18663
DESCRIPTION
The SA605 is a high performance monolithic low-power FM IF
system incorporating a mixer/oscillator, two limiting intermediate
frequency amplifiers, quadrature detector, muting, logarithmic
received signal strength indicator (RSSI), and voltage regulator. The
SA605 combines the functions of Signetics’ SA602 and SA604A, but
features a higher mixer input intercept point, higher IF bandwidth
(25MHz) and temperature compensated RSSI and limiters
permitting higher performance application. The SA605 is available
in 20-lead dual-in-line plastic, 20-lead SOL (surface-mounted
miniature package) and 20-lead SSOP (shrink small outline
package).
The SA605 and SA615 are functionally the same device types. The
difference between the two devices lies in the guaranteed
specifications. The SA615 has a higher I
CC
, lower input third order
intercept point, lower conversion mixer gain, lower limiter gain, lower
AM rejection, lower SINAD, higher THD, and higher RSSI error than
the SA605. Both the SA605 and SA615 devices will meet the EIA
specifications for AMPS and TACS cellular radio applications.
For additional technical information please refer to application notes
AN1994, 1995 and 1996, which include example application
diagrams, a complete overview of the product, and artwork for
reference.
APPLICATIONS
•Cellular radio FM IF
•High performance communications receivers
•Single conversion VHF/UHF receivers
•SCA receivers
•RF level meter
•Spectrum analyzer
•Instrumentation
•FSK and ASK data receivers
•Log amps
•Wideband low current amplification
PIN CONFIGURATION
RF
IN
1
RF BYPASS 2
XTAL OSC 3
XTAL OSC 4
MUTE
IN
5
RSSI
OUT
7
20 MIXER OUT
19
18 IF AMP IN
17
16 IF AMP OUT
15 GND
14 LIMITER IN
13
12
11 LIMITER OUT
V
CC
6
MUTED AUDIO OUT
8
UNMUTED AUDIO OUT 9
QUADRATURE IN
10
IF AMP DECOUPLING
IF AMP DECOUPLING
LIMITER DECOUPLING
LIMITER DECOUPLING
N, D and DK Packages
SR00335
Figure 1. Pin Configuration
FEATURES
•Low power consumption: 5.7mA typical at 6V
•Mixer input to >500MHz
•Mixer conversion power gain of 13dB at 45MHz
•Mixer noise figure of 4.6dB at 45MHz
•XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local
oscillator can be injected)
•102dB of IF Amp/Limiter gain
•25MHz limiter small signal bandwidth
•Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 90dB
•Two audio outputs - muted and unmuted
•Low external component count; suitable for crystal/ceramic/LC
filters
•Excellent sensitivity: 0.22µV into 50Ω matching network for 12dB
SINAD (Signal to Noise and Distortion ratio) for 1kHz tone with RF
at 45MHz and IF at 455kHz
•SA605 meets cellular radio specifications
•ESD hardened
ORDERING INFORMATION
DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #
20-Pin Plastic Dual In-Line Package (DIP) –40 to +85°C SA605N SOT146-1
20-Pin Plastic Small Outline Large (SOL) package –40 to +85°C SA605D SOT163-1
20-Pin Plastic Shrink Small Outline Package (SSOP) –40 to +85°C SA605DK SOT266-1
Philips Semiconductors Product specification
SA605High performance low power mixer FM IF system
1997 Nov 07
3
BLOCK DIAGRAM
20 19 18 17 16 15 14 13 12 11
10987654321
RSSI
OSCILLATOR
IF
AMP
LIMITER
EB
SR00336
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNITS
V
CC
Single supply voltage 9 V
T
STG
Storage temperature range -65 to +150
°C
T
A
Operating ambient temperature range SA605 –40 to +85
°C
θ
JA
Thermal impedance D package
N package
SSOP package
90
75
117
°C/W
DC ELECTRICAL CHARACTERISTICS
V
CC
= +6V, T
A
= 25°C; unless otherwise stated.
LIMITS
SYMBOL PARAMETER TEST CONDITIONS SA605 UNITS
MIN TYP MAX
V
CC
Power supply voltage range 4.5 8.0 V
I
CC
DC current drain 4.55 5.7 6.55 mA
Mute switch input threshold
(ON)
1.7 V
(OFF) 1.0 V
Philips Semiconductors Product specification
SA605High performance low power mixer FM IF system
1997 Nov 07
4
AC ELECTRICAL CHARACTERISTICS
T
A
= 25°C; V
CC
= +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 SA605 UNITS
MIN TYP MAX
Mixer/Osc section (ext LO = 300mV)
f
IN
Input signal frequency 500 MHz
f
OSC
Crystal oscillator frequency 150 MHz
Noise figure at 45MHz 5.0 dB
Third-order input intercept point f1 = 45.0; f2 = 45.06MHz -10 dBm
Conversion power gain Matched 14.5dBV step-up 10 13 15 dB
50Ω source -1.7 dB
RF input resistance Single-ended input 3.0 4.7 kΩ
RF input capacitance 3.5 4.0 pF
Mixer output resistance (Pin 20) 1.25 1.5 kΩ
IF section
IF amp gain 50Ω source 39.7 dB
Limiter gain 50Ω source 62.5 dB
Input limiting -3dB, R
17
= 5.1k Test at Pin 18 -113 dBm
AM rejection 80% AM 1kHz 29 34 43 dB
Audio level, R
10
= 100k 15nF de-emphasis 80 150 260 mV
RMS
Unmuted audio level, R
11
= 100k 150pF de-emphasis 480 mV
SINAD sensitivity RF level -118dB 16 dB
THD Total harmonic distortion -34 -42 dB
S/N Signal-to-noise ratio No modulation for noise 73 dB
IF RSSI output, R
9
= 100kΩ
1
IF level = -118dBm 0 160 650 mV
IF level = -68dBm 1.9 2.5 3.1 V
IF level = -18dBm 4.0 4.8 5.6 V
RSSI range R
9
= 100kΩ Pin 16 90 dB
RSSI accuracy R
9
= 100kΩ Pin 16 +1.5 dB
IF input impedance 1.40 1.6 kΩ
IF output impedance 0.85 1.0 kΩ
Limiter input impedance 1.40 1.6 kΩ
Unmuted audio output resistance 58 kΩ
Muted audio output resistance 58 kΩ
RF/IF section (int LO)
Unmuted audio level 4.5V = V
CC
, RF level = -27dBm 450 mV
RMS
System RSSI output 4.5V = V
CC
, RF level = -27dBm 4.3 V
NOTE:
1. The generator source impedance is 50Ω, but the SA605 input impedance at Pin 18 is 1500Ω. As a result, IF level refers to the actual signal
that enters the SA605 input (Pin 8) which is about 21dB less than the ”available power” at the generator.
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