SA626 Philips Semiconductors (Acquired by NXP), SA626 Datasheet - Page 2

• Manufacturer Part Number: SA626
• Description: SA626; Low Voltage High Performance Mixer FM if System With High-speed Rssi
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
DESCRIPTION
The SA626 is a low-voltage high performance monolithic FM IF
system incorporating a mixer/oscillator, two limiting intermediate
frequency amplifiers, quadrature detector, high speed logarithmic
received signal strength indicator (RSSI), voltage regulator and
audio and fast RSSI op amps. The SA626 is available in 20-lead
SOL (surface-mounted small outline large package) and 20-lead
SSOP (shrink small outline package).
The SA626 was designed for high bandwidth portable
communication applications and will function down to 2.7V. The RF
section is similar to the famous NE605. The audio and RSSI
outputs have amplifiers. The RSSI output has access to the
feedback pin. This enables the designer to level adjust the outputs
or add filtering.
SA626 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.
APPLICATIONS
FEATURES
ORDERING INFORMATION
1997 Sept 25
20-Pin Plastic Small Outline Large (SOL) package (Surface-mount)
20-Pin Plastic Shrink Small Outline Package (Surface-mount)
Digital cordless telephones
Digital cellular telephones
Digital cellular base stations
Portable 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
Fast RSSI rise and fall times
Low power consumption: 6.5mA typ at 3V
Power down mode (I
Low voltage high performance mixer FM IF
system with high-speed RSSI
CC
= 200 A)
DESCRIPTION
2
PIN CONFIGURATION
SINAD (Signal to Noise and Distortion ratio) for 1kHz tone with RF
Mixer input to >500MHz
Mixer conversion power gain of 11dB at 240MHz
Mixer noise figure of 14dB at 240MHz
XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz, local
oscillator can be injected)
92dB of IF Amp/Limiter power gain
25MHz limiter small signal bandwidth
Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 90dB
Audio output internal buffer
RSSI output internal buffer
Internal op amps with rail-to-rail outputs
10.7MHz filter matching (330 ) reduces external component
count; suitable for crystal/ceramic/LC filters
Excellent sensitivity: 0.54 V into 50 matching network for 12dB
at 240MHz and IF at 10.7MHz
SA626 meets cellular radio specifications
ESD hardened
POWER DOWN CONTROL 8
TEMPERATURE RANGE
XTAL OSC EMITTER 3
XTAL OSC (BASE)
QUADRATURE IN 10
RSSI FEEDBACK
-40 to +85 C
-40 to +85 C
AUDIO OUT 9
RF BYPASS 2
RSSI
Figure 1. Pin Configuration
V
RF
OUT
CC
IN
D and DK Packages
1
4
5
6
7
ORDER CODE
SA626DK
SA626D
20 MIXER OUT
19
18 IF AMP IN
17
16 IF AMP OUT
15 GND
14 LIMITER IN
13
12
11
IF AMP DECOUPLING
IF AMP DECOUPLING
LIMITER DECOUPLING
LIMITER DECOUPLING
LIMITER OUT
Product specification
853-1723 18427
SA626
SOT163-1
SOT266-1
DWG #
SR00470