Philips Semiconductors
Product specification
High performance low power mixer FM IF system
SA615
DESCRIPTION
PIN CONFIGURATION
The SA615 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
SA615 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 SA615 is available in
20-lead dual-in-line plastic, 20-lead SOL (surface-mounted miniature
package) and 20-lead SSOP (shrink small outline package).
N, D and DK Packages
RF
1
20 MIXER OUT
IN
RF BYPASS
XTAL OSC
XTAL OSC
2
3
19
IF AMP DECOUPLING
18 IF AMP IN
17
16
4
5
IF AMP DECOUPLING
MUTE
IN
IF AMP OUT
GND
15
The SA605 and SA615 are functionally the same device types. The
difference between the two devices lies in the guaranteed
6
7
8
V
CC
LIMITER IN
14
13
12
11
RSSI
OUT
specifications. The SA615 has a higher I , lower input third order
CC
LIMITER DECOUPLING
LIMITER DECOUPLING
MUTED AUDIO OUT
intercept point, lower conversion mixer gain, lower limiter gain, lower
AM rejection, lower SINAD, higher THD, and higher RSSI error than
the SA615. Both the SA605 and SA615 devices will meet the EIA
specifications for AMPS and TACS cellular radio applications.
9
UNMUTED AUDIO OUT
QUADRATURE IN
10
LIMITER OUT
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.
NOTE:
See back page for package dimensions
SR00341
Figure 1. Pin Configuration
FEATURES
APPLICATIONS
• Low power consumption: 5.7mA typical at 6V
• Cellular radio FM IF
• Mixer input to >500MHz
• High performance communications receivers
• Single conversion VHF/UHF receivers
• SCA receivers
• 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
• RF level meter
oscillator can be injected)
• Spectrum analyzer
• 102dB of IF Amp/Limiter gain
• Instrumentation
• 25MHz limiter small signal bandwidth
• FSK and ASK data receivers
• Log amps
• Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 90dB
• Wideband low current amplification
• 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
• SA615 meets cellular radio specifications
• ESD hardened
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
–40 to +85°C
ORDER CODE
SA615N
DWG #
20-Pin Plastic Dual In-Line Package (DIP)
20-Pin Plastic Small Outline Large (SOL) package
20-Pin Plastic Shrink Small Outline Package (SSOP)
SOT146-1
SOT108-1
SOT266-1
–40 to +85°C
SA615D
–40 to +85°C
SA615DK
2
1997 Nov 07
853-1402 18665
NXP [ NXP ]
