SA58641 Philips Semiconductors, SA58641 Datasheet - Page 2

• Manufacturer Part Number: SA58641
• Description: High performance mixer FM IF system
• Manufacturer: Philips Semiconductors

Philips Semiconductors
DESCRIPTION
The SA58641 is a high performance monolithic FM IF system with
high-speed RSSI incorporating a mixer/oscillator, two limiting
intermediate frequency amplifiers, quadrature detector, logarithmic
received signal strength indicator (RSSI), voltage regulator,
wideband data output and fast RSSI op amps. The SA58641 is
available in 20-lead SSOP (shrink small outline package).
The SA58641 was designed for high bandwidth portable
communication applications and will function down to 2.7 V. The RF
section is similar to the famous SA605. The data output has a
minimum bandwidth of 600 kHz. This is designed to demodulate
wideband data. The RSSI output is amplified. The RSSI output has
access to the feedback pin. This enables the designer to adjust the
level of the outputs or add filtering.
SA58641 incorporates a power-down mode which powers down the
device when Pin 8 is LOW. Power down logic levels are CMOS and
TTL compatible with high input impedance.
FEATURES
ORDERING INFORMATION
2004 Dec 16
20-Pin Plastic Shrink Small Outline Package (Surface-mount)
Wideband data output (600 kHz min.)
Fast RSSI rise and fall times
Low power consumption: 7.5 mA typ. at 5 V
Mixer input to >500 MHz
Mixer noise figure of 12 dB at 240 MHz
XTAL oscillator effective to 150 MHz (L.C. oscillator to 1 GHz local
oscillator can be injected)
92 dB of IF Amp/Limiter gain
25 MHz limiter small signal bandwidth
Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 90 dB
RSSI output internal op amp
Internal op amps with rail-to-rail outputs
Low external component count; suitable for crystal/ceramic/LC
filters
Excellent sensitivity: 0.54 V into 50
12 dB SINAD (Signal to Noise and Distortion ratio) for 1 kHz tone
with RF at 240 MHz and IF at 10.7 MHz
ESD hardened
10.7 MHz filter matching (330 )
Power-down mode (I
High performance mixer FM IF system
with high-speed RSSI
CC
= 200 A)
DESCRIPTION
matching network for
2
PIN CONFIGURATION
APPLICATIONS
TEMPERATURE RANGE
DECT (Digital European Cordless Telephone)
Digital cordless telephones
Digital cellular telephones
Portable high performance communications receivers
Single conversion VHF/UHF receivers
FSK and ASK data receivers
Wireless LANs
POWER DOWN CONTROL
–40 C to +85 C
XTAL OSC (EMITTER)
XTAL OSC
QUADRATURE IN
RSSI FEEDBACK
RF BYPASS
DATA OUT
RSSI
(BASE)
Figure 1. Pin configuration
V
RF
CC
OUT
IN
10
1
2
3
4
5
6
7
8
9
DK Package
ORDER CODE
SA58641DK
20
19
18
17
16
15
14
13
12
11
IF AMP DECOUPLING
IF AMP OUT
LIMITER IN
LIMITER DECOUPLING
LIMITER DECOUPLING
LIMITER OUT
IF AMP DECOUPLING
MIXER OUT
IF AMP IN
GND
SA58641
Objective data
SOT266–1
DWG #
SR00491