SL6659 [ZARLINK]
LOW POWER IF/AF CIRCUIT (WITH RSSI) FOR FM RADIO; 低功耗IF / AF电路（具有RSSI ） FM收音机
| 型号： | SL6659 |
| 厂家： | 
ZARLINK SEMICONDUCTOR INC |
| 描述： | LOW POWER IF/AF CIRCUIT (WITH RSSI) FOR FM RADIO |
| 文件： | 总15页 (文件大小：492K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
This product is obsolete.
This information is available for your
convenience only.
For more information on
Zarlink’s obsolete products and
replacement product lists, please visit
http://products.zarlink.com/obsolete_products/
THIS DOCUMENT IS FOR MAINTENANCE
PURPOSES ONLY AND IS NOT
RECOMMENDED FOR NEW DESIGNS
2471-3.1
SL6659
LOW POWER IF/AF CIRCUIT (WITH RSSI) FOR FM RADIO
TheSL6659isacompletesinglechipmixer,IFamplifierand
detector for FM cellular radio, cordless telephones and low
power radio applications. It features an exceptionally stable
RSSI (Received Signal Strength Indicator) output using a
unique system of detection. Supply current is less than 2mA
from a supply voltage in the range 2·5V to 7·5V.
FEATURES
■ Low Power Consumption (1·5mA)
■ Single Chip Solution
■ Guaranteed 200MHz Operation
MP16
■ Exceptionally Stable RSSI
Fig. 1 Pin connections – top view
APPLICATIONS
■ Cellular Radio Telephones
■ Cordless Telephones
QUICK REFERENCE DATA
■ Supply Voltage: 2·5V to 7·5V
■ Sensitivity: 3µV
ORDERING INFORMATION
SL6659 NA MP – Miniature plastic DIL package
SL6659 NA MPTD - As above, supplied on tape and reel
■ Co-channel Rejection: 7dB
Fig. 2 Block diagram
ABSOLUTE MAXIMUM RATINGS
Supply voltage
Storage temperature
Mixer input
8V
255°C to 1150°C
1Vrms
NOTE: This device has static sensitive inputs, sensitivity
typically measured as 500V using MIL-STD-883 method
3015. Therefore, ESD handling precautions are essential to
avoid degradation of performance or permanent damage of
this device.
ELECTRICAL CHARACTERISTICS
The characteristics are guaranteed over the following condltions, unless otherwise stated:
VCC = 2·5V to 7·5V, TAMB = 230°C to 185°C, IF = 455kHz, RF = 50MHz, Quad Coil working Q = 30
Value
Characteristic
Units
Conditions
Min.
Typ.
Max.
Overall
Supply current
1·5
5
3
40
1·2
7
2·0
mA
µV
µV
dB
V
20dB SINAD
Sensitivity
12dB SINAD
RF input ,500µV
TAMB = 25°C
See Note 2
AM rejection
VBIAS
Co-channel rejection
1·0
1·4
dB
Mixer
RF input impedance
LO input impedance
LO input bias
1
2
5
kW
kW
µA
At VBIAS
Mixer gain
3rd order input intercept
LO input level
15
210
dB
RLOAD = 1.5kW
dBm
mV
MHz
180
200
300
LO frequency
IF Amplifier
Gain
Frequency
Differential input impedance
90
1500
20
dB
kHz
kW
455
75
Detector
Audio output level
Ultimate S/N ratio
THD
125
5
mV
dB
%
60
0·5
40
5mV into pin 13
Output impedance
kW
RSSI Output (TAMB = 125°C)
Output current
25
80
1·5
µA
µA
µA/dB
dB
No input pin13
Pin 13 = 2·5mV
See Note 1
50
0·9
70
Current change
Linear dynamic range
1·22
See Note 1
NOTES
1. The RSSI output is 100% dynamically tested at 5V and 120°C over a 70dB range. First the input to pin 13 is set to 2·5mV and the RSSI current
recorded. Then for each step of 10dB from 240 to 130db, the current is measured. The current change in each step must meet the specified
figure for current change. The RSSI output is guaranteed monotonic and free from discontinuities over this range.
2. Co-channel rejection is measured by applying a 3kHz deviation, 1kHz modulated signal at an input level to give a 20dB SINAD ratio. Then
a 3kHz deviation 400Hz modulated slgnal on the same frequency is also applied and its level increased to degrade the SINAD to 14dB.
2
SL6659
Fig. 3 Internal schematic
GENERAL DESCRIPTION
ceramic filter. Because of the high gain, pins 11 and 12 must be
adequately bypassed.
The SL6659 is a very low power, high performance integrated
circuit intended for IF amplification and demodulation in FM radio
receivers. It comprises:
Detector
Aconventionalquadraturedetector providingaudio outputisfed
internally from the IFamplifier;the quadrature inputis fedexternally
using an appropriate capacitor and phase shift network.
●
●
●
●
A mixer stage for use up to 200MHz
A limiting amplifier operating up to 1·5MHz
A quadrature detector with AF output
An RSSI (Received Signal Strength Indicator) output
RSSI Output
TheRSSIoutputisacurrentsourcewithvalueproportionaltothe
logarithmoftheIFsignalamplitude.Thereisasmallresidualcurrent
due to noise within the amplifier (and mixer) but beyond this point
there is a measured and guaranteed 70dB dynamic range. The
typical range extends to 92dB, independent of frequency, and with
exceptionally good temperature and supply voltage stability.
Mixer
The Mixer is single balanced with an active load. Gain is set
externally by the load resistor, although the value is normally
determined by that required for matching into the ceramic filter. It is
possibletouseatunedcircuitbutanincreaseinmixergainwillresult
in a corresponding reduction of the mixer input intercept point.
The RF input is a diode-biased transistor with a bias current of
typically 300µA. The LO input is differential but would normally be
drivensingle-ended.Specialcareshouldbetakentoavoidacciden-
tal overload of the local oscillator input.
Supply Voltage
The SL6659 will operate reliably trom 2·5V to 7·5V. The supply
line must be decoupled with 470nF using short leads.
Internal Bias Voltage
IF Amplifier
The internal band-gap reference must be externally decoupled.
It can be used as an external reference but must not be loaded
heavily; the output impedance is typically 14W..
Thelimitingamplifieriscapableofoperationtoatleast1MHzand
the input impedance is set by an external resistor to match the
3
Fig. 4 Audio output v. input and temperature at 2·5V
Fig. 5 Audio output v. input and temperature at 5·0V
Fig. 6
FreeHand 3 .1 1
2 0 / 5 / 9 4 1 8 :0 8
Fig. 6 Audio output v. input and temperature at 7·5V
Fig. 7 Audio output v. input and supply voltage at 125°C
Fig. 9
FreeHand 3 .1 1
2 0 / 5 / 9 4 1 8 :0 9
Fig. 8 SINAD v. input level
Fig. 9 AM rejection and input level
4
SL6659
Fig. 1 0
Fig. 1 1
FreeHand 3 .1 1
2 0 / 5 / 9 4 1 8 :1 1
FreeHand 3 .1 1
2 0 / 5 / 9 4 1 8 :1 3
Fig. 10 RSSI output v. input and supply voltage
(TAMB = 20°C)
Fig. 11 RSSI output v. input and temperature
(VCC = 2·5V)
Fig. 1 2
Fig. 1 3
FreeHand 3 .1 1
2 0 / 5 / 9 4 1 8 :1 4
FreeHand 3 .1 1
2 0 / 5 / 9 4 1 8 :1 5
Fig. 12 RSSI output v. input level and temperature
(VCC = 5V)
Fig. 13 RSSI output v. input level and temperature
(VCC = 7·5V)
5
Fig. 14 (Signal1noise) to noise ratio v. input level
Fig. 15 Supply current v. supply voltage
Fig. 16 Supply current v. temperature
Fig. 17 Circuit diagram of SL6659 demonstration board
6
SL6659
Fig. 18 Track side of demonstration board. Scale = 2:1.
Fig. 19 Ground plane side of demonstration board. Scale = 2:1.
7
Fig. 20 Demonstration board surface mount component overlay (track side). Scale = 2:1.
Fig. 21 Demonstration board connectors and through-board component overlay (ground plane side). Scale = 2:1.
8
SL6659
COMPONENT LIST
Resistors
Capacitors
Inductors
Filter
R1 51W
R2* 1kW
R3 1·5kW C3 10nF
R4 10kW C4 10pF
R5 1·5kW C5 330pF C12 220nF*
R6 33kW
C1 100nF C8 470nF L1* 330µH (adjustable),
C2 10nF C9 10nF CAMBION Type 553-7107-43
F1* MURATA
Type CFW 445 E
C10 100nF RFC*4·7µH
C11 220nF*
C6 1nF
C13 220nF
C7 270pF
Components marked thus: * are through-board mounted from the ground plane side; all other components are
surface mounted on the track side. See Figs. 20 and 21.
9
NOTES
10
SL6659
NOTES
11
PACKAGE DETAILS
Dimensions are shown thus: mm (in).
HEADQUARTERS OPERATIONS
GEC PLESSEY SEMICONDUCTORS
Cheney Manor, Swindon,
Wiltshire SN2 2QW, United Kingdom.
Tel: (0793) 518000
CUSTOMER SERVICE CENTRES
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FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Fax : (1) 64 46 06 07
GERMANY Munich Tel: (089) 3609 06-0 Fax : (089) 3609 06-55
ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993
JAPAN Tokyo Tel: (3) 5276-5501 Fax: (3) 5276-5510
Fax: (0793) 518411
NORTH AMERICA Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 7023.
SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872
SWEDEN Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36
TAIWAN, ROC Taipei Tel: 886 2 5461260 Fax: 886 2 7190260
UK, EIRE, DENMARK, FINLAND & NORWAY
GEC PLESSEY SEMICONDUCTORS
P.O. Box 660017
1500 Green Hills Road,
Scotts Valley, CA95067-0017
United States of America.
Tel (408) 438 2900
Swindon Tel: (0793) 518510 Fax : (0793) 518582
These are supported by Agents and Distributors in major countries world-wide.
© GEC Plessey Semiconductors 1994 Publication No. DS2471 Issue No. 3.1 June 1994
TECHNICAL DOCUMENTATION – NOT FOR RESALE. PRINTED IN UNITED KINGDOM
Fax: (408) 438 5576
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