Philips SA626D, SA626DK Datasheet

SA626
Low voltage high performance mixer FM IF system with high-speed RSSI
Product specification IC17 Data Handbook
 
1997 Sept 25
Philips Semiconductors Product specification
Low voltage high performance mixer FM IF system with high-speed RSSI
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
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
FEA TURES
Fast RSSI rise and fall times
Low power consumption: 6.5mA typ at 3V
Power down mode (I
= 200µA)
CC
PIN CONFIGURATION
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
92dB of IF Amp/Limiter power gain
25MHz limiter small signal bandwidth
Temperature compensated logarithmic Received Signal Strength
Audio output internal buffer
RSSI output internal buffer
Internal op amps with rail-to-rail outputs
10.7MHz filter matching (330) reduces external component
Excellent sensitivity: 0.54µV into 50 matching network for 12dB
SA626 meets cellular radio specifications
ESD hardened
SA626
D and DK Packages
RF
1
IN
RF BYPASS 2
XTAL OSC EMITTER 3
XTAL OSC (BASE) 4
V
5
CC
RSSI FEEDBACK
RSSI
POWER DOWN CONTROL
AUDIO OUT
QUADRATURE IN
oscillator can be injected)
Indicator (RSSI) with a dynamic range in excess of 90dB
count; suitable for crystal/ceramic/LC filters
SINAD (Signal to Noise and Distortion ratio) for 1kHz tone with RF
at 240MHz and IF at 10.7MHz
6
7
OUT
8
9
10
Figure 1. Pin Configuration
20 MIXER OUT 19
IF AMP DECOUPLING 18 IF AMP IN 17
IF AMP DECOUPLING 16 IF AMP OUT 15 GND 14 LIMITER IN
LIMITER DECOUPLING
13 12
LIMITER DECOUPLING 11 LIMITER OUT
SR00470
ORDERING INFORMATION
DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #
20-Pin Plastic Small Outline Large (SOL) package (Surface-mount) -40 to +85°C SA626D SOT163-1 20-Pin Plastic Shrink Small Outline Package (Surface-mount) -40 to +85°C SA626DK
1997 Sept 25 853-1723 18427
2
SOT266-1
Philips Semiconductors Product specification
Low voltage high performance mixer FM IF system with high-speed RSSI
BLOCK DIAGRAM
20 19 18 17 16 15 14 13 12 11
IF AMP
MIXER
OSCILLATOR
EB
Figure 2. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNITS
T
V
V
θ
CC
IN
STG
T
A
JA
Single supply voltage 0.3 to 7 V Voltage applied to any other pin –0.3 to (VCC+0.3) V
Storage temperature range -65 to +150 Operating ambient temperature range SA626 –40 to +85
Thermal impedance D package 90
DK package 117
GND
V
CC
RSSI
FAST RSSI
LIMITER
QUAD
+
PWR DWN
+
AUDIO
10987654321
SA626
SR00471
°C
°C °C/W °C/W
DC ELECTRICAL CHARACTERISTICS
VCC = +3V, TA = 25°C; unless otherwise stated.
LIMITS
SYMBOL PARAMETER TEST CONDITIONS SA626 UNITS
MIN TYP MAX
V
I I
t
t
OFF
Power supply voltage range 2.7 3.0 5.5 V
CC
DC current drain Pin 8 = HIGH 5.5 6.5 7.5 mA
CC
Standby Pin 8 = LOW 0.2 0.5 mA
CC
Input current Pin 8 LOW –10 10 µA
Pin 8 HIGH –10 10 µA
Input level Pin 8 LOW 0 0.3V
Pin 8 HIGH 0.7V
Power up time RSSI valid (10% to 90%) 10 µs
ON
CC
Power down time RSSI invalid (90% to 10%) 5 µs
CC
V
CC
V V
1997 Sept 25
3
Philips Semiconductors Product specification
Low voltage high performance mixer FM IF system with high-speed RSSI
AC ELECTRICAL CHARACTERISTICS
TA = 25°C; VCC = +3V, unless otherwise stated. RF frequency = 240.05MHz + 14.5dBV RF input step-up; IF frequency = 10.7MHz; RF level =
-68dBm; FM modulation = 1kHz with ±125kHz peak deviation. Audio output with C-message weighted filter and de-emphasis filter. Test circuit Figure 1. The parameters listed below are tested using automatic test equipment to assure consistent electrical characteristics. The limits do not represent the ultimate performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters.
LIMITS
SYMBOL PARAMETER TEST CONDITIONS SA626 UNITS
MIN TYP MAX
Mixer/Osc section (ext LO = 160mV
f
Input signal frequency 500 MHz
IN
f
OSC
IF section
THD Total harmonic distortion -43 –38 dB
S/N Signal-to-noise ratio No modulation for noise 60 dB
RF/IF section (int LO)
External oscillator (buffer) 500 MHz Noise figure at 240MHz 14 dB Third-order input intercept point Matched f1=240.05; f2=240.35MHz -16 dBm Conversion power gain Matched 14.5dBV step-up 8 11 14 dB RF input resistance Single-ended input 700 RF input capacitance 3.5 pF Mixer output resistance (Pin 20) 330
IF amp power gain 38 dB Limiter amp power gain 54 dB Input limiting -3dB Test at Pin 18 –105 dBm AM rejection 80% AM 1kHz 50 dB Audio level Unity gain 120 160 200 mV Audio DC level Pin 9, no signal 1.0 V SINAD sensitivity IF level = -111dBm 16 dB
IF RSSI output with buffer IF level = -118dBm 0.2 0.5 V
IF RSSI output rise time IF frequency = 10.7MHz (10kHz pulse, no 10.7MHz filter) RF level = -56dBm 1.2 µs (no RSSI bypass capacitor) RF level = -28dBm 1.1 µs IF RSSI output fall time IF frequency = 10.7MHz (10kHz pulse, no 10.7MHz filter) RF level = -56dBm 2.0 µs (no RSSI bypass capacitor) RF level = -28dBm 7.3 µs RSSI range 90 dB RSSI accuracy +1.5 dB IF input impedance 330 IF output impedance 330 Limiter input impedance 330 Limiter output impedance 300 Limiter output level with no load 130 mV
Audio level RF level = -10dBm 160 mV System RSSI output RF level = -10dBm 1.4 V System SINAD RF level = -106dBm 12 dB
RMS
)
IF level = -68dBm 0.3 0.6 1.0 V IF level = -10dBm 0.9 1.3 1.8 V
SA626
RMS
RMS
RMS
1997 Sept 25
4
Philips Semiconductors Product specification
Low voltage high performance mixer FM IF system with high-speed RSSI
9.0
8.5
V
8.0
7.5
7.0
6.5
SUPPLY CURRENT (mA)
6.0
5.5
5.0 –50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
= 5V
CC
VCC = 3V
= 2.7V
V
CC
Supply Current vs Temp and Supply Voltage Power Down Supply Current vs Temp and Supply Voltage
20 19 18 17 16 15 14 13 12
MIXER GAIN (dB)
11 10
9 8 7 6 5
Mixer Power Gain vs Temperature and Supply Voltage
300 275 250 225 200 175 150
AUDIO (mV)
125 100
75 50 25
= 5V
V
CC
VCC = 3V
= 2.7V
V
CC
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
0
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
TEMPERATURE (°C)
= 5V
V
CC
VCC = 3V
= 2.7V
V
CC
Third Order Input Intercept Point vs Temp and Supply Voltage
Audio Output Level vs. Temp and Supply Voltage
Figure 3. Performance Characteristics
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
POWER DOWN SUPPLY CURRENT (mA)
0.05
0.00 –50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
–6
–8 –10 –12 –14 –16 –18 –20 –22 –24 –26
THIRD ORDER INPUT INTERCEPT POINT dBm)
–28 –30
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
20
0
–20
–40
AUDIO (dB)
–60
–80
–100
–120
–50–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
12dB SINAD and Relative Audio, THD, Noise and AM
Rejection for VCC = 3V vs Temperature RF = 240MHz,
Level = –68dBm, Deviation = 125kHz
= 5V
V
CC
V
= 3V
CC
VCC = 2.7V
V
= 5V
CC
VCC = 3V
= 2.7V
V
CC
AUDIO
AM REJECTION
DISTORTION
NOISE
12dB SINAD
SA626
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
SR00472
1997 Sept 25
5
Loading...
+ 11 hidden pages