SA639DH,518 NXP Semiconductors, SA639DH,518 Datasheet - Page 2

• Manufacturer Part Number: SA639DH,518
• Manufacturer: NXP Semiconductors

Specifications of SA639DH,518

• Operating Supply Voltage: 3V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
DESCRIPTION
The SA639 is a low-voltage high performance monolithic FM IF
system with high-speed RSSI incorporating a mixer/oscillator, two
wideband limiting intermediate frequency amplifiers, quadrature
detector, logarithmic received signal strength indicator (RSSI), fast
RSSI op amps, voltage regulator, wideband data output, post
detection filter amplifier and data switch. The SA639 is available in
24-lead TSSOP (Thin shrink small outline package).
The SA639 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 data output provides a
minimum bandwidth of 1MHz to demodulate wideband data. The
RSSI output is amplified and has access to the feedback pin. This
enables the designer to level adjust the outputs or add filtering.
The post-detection amplifier may be used to realize a low pass filter
function. A programmable data switch routes a portion of the data
signal to an external integration circuit that generates a data
comparator reference voltage.
SA639 incorporates a power down mode which powers down the
device when Pin 8 is high. Power down logic levels are CMOS and
TTL compatible with high input impedance.
APPLICATIONS
FEATURES
ORDERING INFORMATION
1998 Feb 10
24-Pin Plastic TSSOP (Thin Shrink Small Outline Package)
DECT (Digital European Cordless Telephone)
FSK and ASK data receivers
V
Low power consumption: 8.6mA typ at 3V
Wideband data output (1MHz min.)
Fast RSSI rise and fall times
Mixer input to >500MHz
Mixer conversion power gain of 9.2dB and noise figure of 11dB at
110MHz
Low voltage mixer FM IF system with filter amplifier
and data switch
CC
= 2.7 to 5.5V
DESCRIPTION
2
PIN CONFIGURATION
POWER DOWN CONTROL
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 80dB
RSSI output internal op amp
Post detection amplifier for filtering
Programmable data switch
Excellent sensitivity: 2.24 V into 50 matching network for 10dB
SNR (Signal to Noise Ratio) with RF at 110MHz and IF at 9.8MHz
ESD hardened
Power down mode
XTAL OSC (EMITTER)
SWITCH CONTROL
XTAL OSC (BASE)
RSSI FEEDBACK
POSTAMP OUT
TEMPERATURE RANGE
RF BYPASS
POSTAMP IN
DATA OUT
RSSI OUT
-40 to +85 C
V
RF
Figure 1. Pin Configuration
CC
IN
10
11
12
1
2
3
4
5
6
7
8
9
ORDER CODE
SA639DH
24
23
22
21
20
19
18
17
16
15
14
13
Product specification
MIXER OUT
IF AMP DECOUPLING
IF AMP IN
IF AMP DECOUPLING
IF AMP OUT
GND
LIMITER IN
LIMITER DECOUPLING
LIMITER DECOUPLING
LIMITER OUT
QUADRATURE IN
SWITCH OUT
853-1792 18944
SA639
SR00030
SOT-355
DWG #