View SL486NAMP_1310065.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Obsolescence Notice
This product is obsolete.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
3055-2.2
SL486
INFRA RED REMOTE CONTROL PREAMPLIFIER
(Supersedes version in April 1994 Consumer IC Handbook, HB3120 - 2.0)
The SL486 is a high gain preamplifier designed to form an interface between an infra-red receiving diode and the digital input of remote control receiving circuits. The device contains two other circuit elements, one to provide a stretched output pulse facility and a voltage regulator to allow operation from a wide range of supplies.
DIODE CATHODE GYRATOR C2 GYRATOR C1 INPUT VCC (VCCI)
1 2 3 4 5 6 7 8
16 15 14 13
DIODE ANODE 1ST STAGE DECOUPLE INPUT VEE (VEEI) OUTPUT VEE (VEEO) REGULATOR INPUT (VREGIN) STRETCH OUTPUT STRETCH INPUT OUTPUT
FEATURES s Fast Acting AGC Improves Operation In Noisy Environments
SL486
2ND STAGE DECOUPLE 4TH STAGE DECOUPLE OUTPUT VCC (VCCO) AGC DECOUPLE
12 11 10 9
s Differential Inputs Reduce Noise Pick-up and Improve
Stability
s Gyrator Circuit Allows Operation in Environments with
High Brightness Background Light Levels
DP16 MP16
s Output Pulse Stretcher for use with Microprocessor
Decoders
Fig. 1 Pin connections - top view
s On-chip Regulator allows Operation from Wide Range
of Power Supplies
ABSOLUTE MAXIMUM RATINGS
Supply voltage, VCCI Supply voltage, VCCO Regulator input voltage, VREGIN Output current Stretch output current Operating temperature range Storage temperature 110V wrt VEEI 110V wrt VEEO 220V wrt VCCO 5mA 5mA 0C to 170C 255C to1150C
s Low Noise Output
ORDERING INFORMATION
SL486 NA DP SL486 NA MP
GYRATOR C1 C2
3 2
VCCI
4
2ND STAGE DECOUPLE
5
4TH STAGE DECOUPLE
6
VCCO
7
11
GYRATOR
PULSE STRETCH
STRETCH OUTPUT STRETCH INPUT
10
DIODE 1 CATHODE DIFFERENTIAL DIODE 16 INPUT STAGE ANODE
15k BUFFER 5*4k AGC PEAK DETECTOR VREG* REGULATOR 2*4k
9
OUTPUT
14
15
8
13
12
VEEI
1ST STAGE DECOUPLE
AGC DECOUPLE
VEEO
*When regulator is used (see Application Notes).
REGULATOR INPUT (VREGIN)
Fig. 2 SL486 block diagram
SL486
ELECTRICAL CHARACTERISTICS
These characteristics are guaranteed over the following conditions (unless otherwise stated): TAMB = 125C, VCCI = VCCO = VCC = 14*5V to 17*0V, VEEI = VEEO = VEE = 0V Characteristic Supply current (see note 1) Pin Min. 4,7 4 4,7 4,7 4,7 13 4,7 1,16 Minimum sensitivity of differential input 1,16 Common mode rejection Maximum signal input AGC range Output and Stretch output internal pull-up resistance Stretch output pulse width, tP 9, 11 11 1,16 3*0 9*0 74*0 168*0 35 4*0 68*0 55*0 2*4 3*513ID 4*5 8*4 5*9 6*2 Value Typ. 6*5 4*213ID 8*5 Max. 9*0 513ID 10 9*5 18 6*5 1*5 1*1 2*3 18*5 42*0 mA mA mA V V V V V nA nA nA dB mA (pk) dB k ms Capacitance pin 9 to pin 10 (C8 on Figs. 4 and 8) = 10nF; 1*5 tP 2RX C8 loge ms VCC where RX = 200k 625% and RX = internal resistance) ISINK = 0*2mA max. ISOURCE = 5A ISINK = 1*6mA max. ISOURCE = 5A, output open circuit Ripple amplitude at 100Hz, VREGIN = 0V Ripple amplitude at 100Hz, VEEO and VEEI = 0V VEEI = VEEO = VREG (see Figs. 4 & 6) VCCO1VREGIN = 116V TAMB = 170C ID = 1*0A ID = 100A ID = 0*5mA VCC = 5*0V, ID = 1*0A VCC = 4*5V, ID<1*5mA VCC = 18V, ID = 1*0A, VREGIN = 0V Units Conditions
Low voltage supply wrt VEEI &VEEO High voltage supply wrt VREGIN Int. regulated voltage, VREG, wrt VCCO
|VCCI2VCCO|
0*7 Temperature coefficient of RX Output low voltage Output high voltage Stretch output low voltage Stretch output high voltage VCCI supply rejection 0*8
NOTE 1. ID = IR diode forward current
%/C VEEO10*35 V V VEEO10*5 V V
9 9 11 11 4 VCCO20*1 1*5 VCCO20*5
V (pk) V (pk)
2

SL486
APPLICATION NOTES - REFER TO FIG. 4
Diode Anode and Cathode (Pins 1 and 16) The infra-red receiving diode is connected between pins 1 and 16. The input circuit is configured so as to reject signals common to both pins. This improves the stability of the device, and greatly reduces the sensitivity to radiated electrical noise, The diode is reverse biased by a nominal 0*65V Gyrator C2 and C1 (Pins 2 and 3) The decoupling, provided by gyrator C2 and C1, rolls off the gain of the feedback loop which balances the DC component of the infra-red diode current. The values of C2 and C1 are chosen to produce a low frequency cut-off characteristic below a nominal 2kHz. Hence, the gyrator produces approximately 20dB rejection at 100Hz. The gyrator consists of two feedback loops operating in tandem. Only one feedback path is functional when the DC component of the diode current is less than 200A. This loop is decoupled by gyrator C2. For diode currents between 200A and 1*5mA the second control loop is operative, and this is decoupled by gyrator C1. The decoupling capacitors, gyrator C2 and C1, must be connected between pins 2 and 3, to pin 4. The series impedance of C2 and C1 should be kept to a minimum. First Stage Decouple (Pin 15) The capacitor on pin 15 decouples the signal from the non-inverting input of the first difference amplifier (see also Fig. 2). The capacitance of 15nF is chosen to produce a 2kHz low frequency roll-off. The capacitor must be connected between pins 15 and 14 (the input ground). Second Stage Decouple (Pin 5) The capacitor on pin 5 decouples the signal from the non-inverting input of the second difference amplifier. The capacifance of 33nF is chosen to produce a 2kHz low frequency roll-off. The capacitor must be connected between pins 5 and 4 (the input VCC). Fourth Stage Decouple (Pin 6) The capacitor on pin 6 decouples the signal from the non-inverting input of the fourth difference amplifier. The capacitance of 4.7nF is chosen to produce a 2kHz low frequency roll-off. The capacitor must be connected between pins 6 and 7 (the output VCC). AGC Decouple/Delay Adjust (Pin 8) The output of the fourth difference amplifier is followed by a peak detector, which is used to provide an AGC control level. This produces a current source which is limited to 10mA at pin 8. The AGC decoupling capacitor (C5 normally 150nF) filters the pulsed input, and the resultant level controls the gain of the first three difference amplifiers. The AGC control level exhibits a fast attack/slow decay characteristic. Immediately infra-red pulses are detected, the gain will be reduced, so that any weaker noise pulses that are also received will not be seen at the output. Thus, provided the infra-red pulses are the most intense, it is possible to receive data in noisy environments. The slow decay keeps the AGC level intact during data reception, and produces a delay before any received noise may become present at the output, when transmission ceases. Output (Pin 9) The output will be low, pulsing high with a source impedance of a nominal 55k , for a received infrared pulse. It is a linear amplification of the input and swings between output ground and output VCC. Stretch Input and Stretch Output (Pins 10 and 11) A typical infra-red PPM system transmits very narrow pulses. The duration of these pulses is typically 15s, so in order to use a microprocessor-based decoder system it is necessary to lengthen the received pulse. This stretched output can be obtained from pin 11 when a capacitor is connected between pins 9 and 10 (C8 in Fig. 4). The width of the pulse is determined by the value of this coupling capacitor and is defined in the Electrical Characteristics. The stretch output is normally high, pulsing low for a received infra-red pulse and swings between VCCO and VEEO. It must be noted that the stretch output logic sense is inverse to that of the output on pin 9 so must be re-inverted for microprocessor applications. Regulator Input, VREGIN (Pin 12) The device can be operated with supplies of between 4*5V and 9*0V connected between input/output ground (pins 14 and 13) and input and output VCC (pins 4 and 7) as shown in Fig. 3. The device can also be operated with supplies in excess of 9*0V by using the on-chip regulator. In this case connections are made between VCCO (pin 7) and the regulator input VREGIN(pin 12) as shown in Fig. 4. A supply voltage of between 9*0V and 18V will then cause VEEO (pin 13) to be regulated at a level nominally 6*4V below VCCO(pin 7). The regulator will, however, lose control with a potential difference of less than 9*0V. Below this level the voltage on pin 13 will track nominally 1*5V above the level of pin 12. When the regulator is not used (low voltage operation), pin 12 must be connected to VEEO (pin 13).
OPERATING NOTES - REFER TO FIGS. 3 AND 4
Gyrator C1 (Pin 3) If the environment in which the device is operating limits the background light such that the DC component of the diode current has a maximum of 200A, it may be desirable to omit (as in Fig. 3) the more bulky and costly 68F capacitor (gyrator C1 shown in Fig. 4). In this case pin 3 can be left open circuit. The resultant application will then have a characteristic of greatly reduced gain when the ambient light causes the DC current to rise above this threshold. Alternatively,the 68F capacitor can be replaced by a resistor. The outcome of this is to further reduce the gain in ambient light levels above the 200A threshold. Below this threshold the overall gain is slightly enhanced as the light level approaches the threshold value. If chosen, this resistance should lie between 10k and 200k . Noise Immunity The stretch output can also be used as a means of improving performance relating to a receiver system, over and above its main purpose of providing a microprocessor interface. Including C8 (Fig. 4) causes the output pulses (from pin 9) to be subjected to the stretch input threshold. Thus any noise pulses from pin 9 that are below this threshold will not be seen at the stretch output (pin 11). A further improvement can be made, using this stretch input threshold, by including some additional filtering of the output (C10 in Fig. 4). This can be adjusted in value (typically 100pF) to reduce some of the noise pulses that otherwise cross the threshold, to a level below the threshold. Screening Use of screening for the device, and associated components, improves the performance and immunity to externally radiated noise. The screening method used must protect the sensitive front-end of the device; provided that the diode, pin 1-pin 16, C2 (pin 2) and the first stage decoupling (pin 15) are screened, it may be found that for the application considered, the remalning circuitry need not be so protected. In applications where externally radiated noise is minimal, it may be possible to reduce any screening to pins 1 and 16 and the diode connections only. Screening may not be necessary in some instances, but this largely depends on the level of radiated noise, the decoupling/filtering employed and the receiver's decoding technique. Decoupling Typical decoupling arrangements for use with or without the regulator are given in Figs. 4 and 3, respectively. When using the regulator, further improvements in high frequency supply rejection are possible by the inclusion of R2. The value can be chosen so as to keep the pin 12 end of R2 within the 29*0 to 218V (wrt pin 7) specified voltage range. For example, if the SL486 is used in a system with a supply of 16V, a typical value tor R2 would be 200. Note that the regulator is a low impedance point between pins 12 and 13. C7 thus maintains a low impedance path between pins 4 and 12 at high frequencies.
3
SL486
I-R RECEIVER DIODE 6*8
1 2 3 4 16 15 14 13
I-R RECEIVER DIODE C2 6*8
1 2 3 16 15 14 13
C9 15n
C9 15n
C1* 68 C3 33n C4 4*7n
4 5 6 7 8
33n 4*7n
5 6 7 8
SL486
12 11 10 9
SL486
12 11 10 9
C8
C7* 0*33 150n 22 R1* 50
C5 150n C6* 22
C10*
CAN BE OMITTED IF ALREADY IN APPLICATION CIRCUIT VCC 0V OUTPUT VCC
SEE APPLICATION NOTES
R2*
* SEE OPERATING NOTES
OUTPUT 0V
Fig. 3 Circuit diagram of minimum component application (low voltage operation)
Fig. 4 SL486 application diagram showing all optional components (Note: supply decoupling and connections for use of voltage regulator, also pulse stretch output)
COPPER SIDE
COMPONENT SIDE
I-R RECEIVER DIODE
1
C2 C3
SL486
C9 C8 (OPTIONAL) SELECTABLE OUTPUT VIA WIRE LINK WIRE LINK, REMOVED FOR USE WITH REGULATOR R2 OR WIRE LINK OUTPUT
C1
C4 C5 C7
R1
C6
SL486
684LS
VCC 0V
Fig. 5 PCB track (actual size)and component layout for the circuit of Fig. 4, using SL486 in DP16 package
4
SL486
116V
6*8
1 2
16 15 14 13
15n
68 22n 4*7n
3 4 5 6 7 8
SL486
12 11 10 9
16V SYSTEM
PPM
0*33
150n
50
22
200 0V
Fig. 6 SL486 application showing the use of the on-chip regulator
15V
6*8
1 2
16 15 14 13
15n
68 22n 4*7n
3 4 5 6 7 8
SL486
12 11 10 9
STRETCHED PPM C8*
MICROPROCESSOR
0*33
150n 0V
50
*SEE TEXT AND
22 ELECTRICAL CHARACTERISTICS
Fig. 7 Microprocessor interface, using the SL486 pulse stretching facility
5
SL486
PACKAGE DETAILS
Dimensions are shown thus: mm (in)
1 7*11 (0*28) MAX 16 0*23/0*41 (0*009/0*016) PIN 1 REF NOTCH 7*62 (0*3) NOM CTRS
1*14/1*65 (0*045/0*065) 20*32 (0*800) MAX
SEATING PLANE
5*08/(0*20) MAX
0*51 (0*02) 3*05 (0*120) MIN MIN
0*38/0*61 (0*015/0*24)
16 LEADS AT 2*54 (0*10) NOM. SPACING
NOTES 1. Controlling dimensions are inches. 2. This package outline diagram is for guidance only. Please contact your GPS Customer Service Centre for further information.
16-LEAD PLASTIC DIL - DP16
9*80/10*01 (0*386/0*394)
0*19/0*25 (0*007/0*010) 0*37 (0*015) 345
16 SPOT REF. CHAMFER REF. PIN 1 5*80/6*20 3*80/4*00 (0*150/0*157) (0*228/0*244)
0-8 0*35/0*49 (0*014/0*019) 0*41/1*27 (0*016/0*050)
0*69 (0*027) MAX 16 LEADS AT 1*27 (0*050) NOM SPACING
0*10/0*25 1*35/1*91 (0*004/0*010) (0*053/0*075)
NOTES 1. Controlling dimensions are millimetres. 2. This package outline diagram is for guidance only. Please contact your GPS Customer Service Centre for further information.
16-LEAD MINIATURE PLASTIC DIL - MP16
HEADQUARTERS OPERATIONS GEC PLESSEY SEMICONDUCTORS Cheney Manor, Swindon, Wiltshire SN2 2QW, United Kingdom. Tel: (0793) 518000 Fax: (0793) 518411 GEC PLESSEY SEMICONDUCTORS P.O. Box 660017 1500 Green Hills Road, Scotts Valley, CA95067-0017 United States of America. Tel (408) 438 2900 Fax: (408) 438 5576
CUSTOMER SERVICE CENTRES q FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Fax : (1) 64 46 06 07 q GERMANY Munich Tel: (089) 3609 06-0 Fax : (089) 3609 06-55 q ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993 q JAPAN Tokyo Tel: (3) 5276-5501 Fax: (3) 5276-5510 q NORTH AMERICA Scotts Valley, USA Tel: (408) 438 2900 Fax: (408) 438 7023. q SOUTH EAST ASIA Singapore Tel: (65) 3827708 Fax: (65) 3828872 q SWEDEN Stockholm Tel: 46 8 702 97 70 Fax: 46 8 640 47 36 q UK, EIRE, DENMARK, FINLAND & NORWAY Swindon Tel: (0793) 518510 Fax : (0793) 518582 These are supported by Agents and Distributors in major countries world-wide. (c) GEC Plessey Semiconductors 1994 Publication No. DS3055 Issue No. 2.2 April 195
This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company reserves the right to alter without prior knowledge the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.
6
For more information about all Zarlink products visit our Web Site at
www.zarlink.com
Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in and I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE

▲Up To Search▲

Price & Availability of SL486NAMP

	To Download SL486NAMP Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .