SA676DK NXP Semiconductors, SA676DK Datasheet

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SA676DK

Manufacturer Part Number
SA676DK
Description
Manufacturer
NXP Semiconductors
Datasheet

Specifications of SA676DK

Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Lead Free Status / Rohs Status
Compliant

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Philips Semiconductors
DESCRIPTION
The SA676 is a low-voltage monolithic FM IF system incorporating a
mixer/oscillator, two limiting intermediate frequency amplifiers,
quadrature detector, logarithmic received signal strength indicator
(RSSI), voltage regulator and audio and RSSI op amps. The SA676
is available in a 20-pin SSOP (shrink small outline package).
The SA676 was designed for cordless telephone applications in
which efficient and economic integrated solutions are required and
yet high performance is desirable. Although the product is not
targeted to meet the stringent specifications of high performance
cellular equipment, it will exceed the needs for analog cordless
phones. The minimal amount of external components and absence
of any external adjustments makes for a very economical solution.
FEATURES
ORDERING INFORMATION
BLOCK DIAGRAM
1993 Dec 15
20-Pin Plastic Shrink Small Outline Package (Surface-mount)
Low power consumption: 3.5mA typical at 3V
Mixer input to >100MHz
Mixer conversion power gain of 17dB at 45MHz
XTAL oscillator effective to 100MHz (L.C. oscillator or external
oscillator can be used at higher frequencies)
102dB of IF Amp/Limiter gain
2MHz IF amp/limiter small signal bandwidth
Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a 70dB dynamic range
Low external component count; suitable for crystal/ceramic/LC
filters
Low-voltage mixer FM IF system
DESCRIPTION
20
1
MIXER
19
2
OSCILLATOR
E
18
3
IF
AMP
Figure 2. Block Diagram
B
17
4
+ –
16
5
6–129
RSSI
TEMPERATURE RANGE
V
REG
PIN CONFIGURATION
APPLICATION
15
6
Audio output internal op amp
RSSI output internal op amp
Internal op amps with rail-to-rail outputs
ESD protection: Human Body Model 2kV
Cordless phones
-40 to +85 C
RF IN– DECOUPLING
AUDIO FEEDBACK
14
7
AUDIO
QUADRATURE IN 10
RSSI FEEDBACK 9
LIMITER
AUDIO OUT
RSSI OUT
+
OSC
13
8
Robot Model 200V
Figure 1. Pin Configuration
RF IN+
OSC
OUT
V
QUAD
CC
IN
12
9
1
2
3
4
5
6
7
8
DK Package
ORDER CODE
11
10
SA676DK
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
853-1726 11659
SA676
SOT266-1
DWG #
SR00515
SR00514

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SA676DK Summary of contents

Page 1

... Figure 2. Block Diagram 6–129 Product specification SA676 DK Package 1 20 MIXER OUT AMP DECOUPLING 18 IF AMP IN 3 OUT AMP DECOUPLING AMP OUT 6 15 GND LIMITER LIMITER DECOUPLING 12 LIMITER DECOUPLING 11 LIMITER OUT SR00514 ORDER CODE DWG # SA676DK SOT266 QUAD 9 10 SR00515 853-1726 11659 ...

Page 2

Philips Semiconductors Low-voltage mixer FM IF system ABSOLUTE MAXIMUM RATINGS SYMBOL V Single supply voltage CC T Storage temperature range STG T Operating ambient temperature range A Thermal impedance JA DC ELECTRICAL CHARACTERISTICS V = +3V ...

Page 3

Philips Semiconductors Low-voltage mixer FM IF system AC ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER RF/IF section (int LO) System SINAD sensitivity NOTE: 1. The generator source impedance but the SA676 input impedance at Pin 18 is 1500 . As ...

Page 4

... R10 10k C27 C7 2.2 F C10 RSSI AUDIO V CC OUTPUT SA676DK Demoboard Application Component List C23 100nF +10% Monolithic Ceramic C26 100nF +10% Monolithic Ceramic C27 2.2 F Tantalum FLT 1 Ceramic Filter Murata SFG455A3 or equiv FLT 2 Ceramic Filter Murata SFG455A3 or equiv IFT 1 330 H TOKO 303LN-1130 L1 ...

Page 5

Philips Semiconductors Low-voltage mixer FM IF system RF GENERATOR 45MHz V CC NOTES: 1. C-message: The C-message and de-emphasis filter combination has a peak gain of 10 for accurate measurements. Without the gain, the measurements may be affected by the ...

Page 6

Philips Semiconductors Low-voltage mixer FM IF system (mA 2. –55 –35 –15 18.00 17.75 17.50 17.25 17.00 16.75 16.50 16.25 16.00 ...

Page 7

Philips Semiconductors Low-voltage mixer FM IF system –10 –20 –30 FUND PRODUCT –40 –50 –60 –70 –80 *50 INPUT –66 –56 Figure 7. Mixer Third Order Intercept and Compression 5 0 –5 –10 –20 –25 –30 –35 ...

Page 8

Philips Semiconductors Low-voltage mixer FM IF system 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 –125 –115 Figure 9. RSSI vs RF Level and Temperature - V V 300 ...

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