SA58640 Low-voltage mixer FM IF system Rev. 01 — 1 November 2004 Objective data sheet 1. Introduction The SA58640 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. 2. General description The SA58640 is a low-voltage monolithic FM IF system incorporating a mixer/oscillator, two limiting intermediate frequency amplifiers, quadrature detector, logarithmic RSSI, voltage regulator and audio and RSSI opamps. The SA58640 is available in a 20-pin SSOP. 3. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Low power consumption: 5.0 mA typical at 5 V Mixer input to >100 MHz Mixer conversion power gain of 17 dB at 45 MHz XTAL oscillator effective to 100 MHz (LC oscillator or external oscillator can be used at higher frequencies) 102 dB of IF amp/limiter gain 2 MHz IF amp/limiter small signal bandwidth Temperature compensated logarithmic RSSI with a 70 dB dynamic range Low external component count; suitable for crystal/ceramic/LC filters Audio output internal opamp RSSI output internal opamp Internal opamps with rail-to-rail outputs ESD protection: Human body model 2 kV; robot model 200 V 4. Applications ■ Cordless phones SA58640 Philips Semiconductors Low-voltage mixer FM IF system 5. Ordering information Table 1: Ordering information Type number Package SA58640DK Name Description Version SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1 6. Block diagram 20 19 18 17 IF amp mixer 16 15 14 13 12 11 limiter RSSI quad OSCILLATOR 1 2 E B 3 4 VREG 5 6 audio 7 8 9 10 002aab125 Fig 1. Block diagram 7. Pinning information 7.1 Pinning RF IN+ 1 20 MIXER OUT RF IN− DECOUPLING 2 19 IF AMP DECOUPLING OSCOUT 3 18 IF AMP IN OSCIN 4 17 IF AMP DECOUPLING RSSI OUT 5 VCC 6 AUDIO FEEDBACK 7 14 LIMITER IN AUDIO OUT 8 13 LIMITER DECOUPLING RSSI FEEDBACK 9 12 LIMITER DECOUPLING SA58640DK QUADRATURE IN 10 16 IF AMP OUT 15 GND 11 LIMITER OUT 002aab134 Fig 2. Pin configuration 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 2 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 7.2 Pin description Table 2: Pin description Symbol Pin Description RF IN+ 1 positive RF mixer input RF IN DECOUPLING 2 negative RF mixer input, decoupling OSCOUT 3 oscillator output (emitter) OSCIN 4 oscillator input (base) RSSI OUT 5 RSSI amplifier output VCC 6 positive supply AUDIO FEEDBACK 7 audio amplifier negative input, feedback AUDIO OUT 8 audio amplifier output RSSI FEEDBACK 9 RSSI amplifier negative input, feedback QUADRATURE IN 10 quadrature detector input LIMITER OUT 11 limiter amplifier output LIMITER DECOUPLING 12 limiter decoupling LIMITER DECOUPLING 13 limiter decoupling LIMITER IN 14 limiter amplifier input GND 15 ground IF AMP OUT 16 IF amplifier output IF AMP DECOUPLING 17 IF amplifier decoupling IF AMP IN 18 IF amplifier input IF AMP DECOUPLING 19 IF amplifier decoupling MIXER OUT 20 mixer output 8. Functional description The SA58640 is an IF signal processing system suitable for second IF systems with input frequency as high as 100 MHz. The bandwidth of the IF amplifier and limiter is at least 2 MHz with 90 dB of gain. The gain/bandwidth distribution is optimized for 455 kHz, 1.5 k: source applications. The overall system is well-suited to battery operation as well as and high quality products of all types. The input stage is a Gilbert cell mixer with oscillator. Typical mixer characteristics include a noise figure of 7.0 dB, conversion gain of 17 dB, and input third-order intercept of 10 dBm. The oscillator will operate in excess of 100 MHz in LC tank configurations. Hartley or Colpitts circuits can be used up to 100 MHz for XTAL configurations. The output impedance of the mixer is a 1.5 k: resistor permitting direct connection to a 455 kHz ceramic filter. The input resistance of the limiting IF amplifiers is also 1.5 k:. With most 455 kHz ceramic filters and many crystal filters, no impedance matching network is necessary. The IF amplifier has 44 dB of gain and 5.5 MHz bandwidth. The IF limiter has 58 dB of gain and 4.5 MHz bandwidth. To achieve optimum linearity of the log signal strength indicator, there must be a 12 dB(V)1 insertion loss between the first and second IF stages. If the IF filter or interstage network does not cause 12 dB(V) insertion loss, a 1. dB(V) = 20log Vo/Vi. 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 3 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system fixed or variable resistor or an L pad for simultaneous loss and impedance matching can be added between the first IF output (pin 16) and the interstage network. The overall gain will then be 90 dB with 2 MHz bandwidth. The signal from the second limiting amplifier goes to a Gilbert cell quadrature detector. One port of the Gilbert cell is internally driven by the IF. The other output of the IF is AC-coupled to a tuned quadrature network. This signal, which now has a 90q phase relationship to the internal signal, drives the other port of the multiplier cell. The demodulated output of the quadrature drives an internal opamp. This opamp can be configured as a unity gain buffer, or for simultaneous gain, filtering, and 2nd-order temperature compensation if needed. It can drive an AC load as low as 10 k: with a rail-to-rail output. A log signal strength indicator completes the circuitry. The output range is greater than 70 dB and is temperature compensated. This signal drives an internal opamp. The opamp is capable of rail-to-rail output. It can be used for gain, filtering, or 2nd-order temperature compensation of the RSSI, if needed. 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 4 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 9. Limiting values Table 3: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter VCC Tstg Conditions Min Max Unit single supply voltage - 7 V storage temperature range 65 150 qC Tamb operating ambient temperature range 40 85 qC Zth thermal impedance - 117 qC/W 10. Static characteristics Table 4: Static characteristics Tamb = 25 qC; VCC = +5 V, unless otherwise stated. [1] Symbol Parameter VCC ICC [1] Conditions Min Typ Max Unit power supply voltage range 4.5 - 6.0 V DC current drain - 5.0 6.0 mA : 9397 750 14161 Objective data sheet : RF frequency = 45 MHz; +14.5 dBV RF input step-up; IF frequency = 455 kHz; R17 = 2.4 k and R18 = 3.3 k ; RF level = 45 dBm; FM modulation = 1 kHz with ± 5 kHz peak deviation. Audio output with de-emphasis filter and C-message weighted filter. See Figure 3 “45 MHz application circuit” on page 7. The parameters listed above 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. © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 5 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 11. Dynamic characteristics Table 5: Symbol Dynamic characteristics Parameter Conditions Min Typ Max Unit mixer/oscillator section (external LO = 220 mVRMS) fin input frequency - 100 - MHz fosc crystal oscillator frequency - 100 - MHz noise figure at 45 MHz - 7.0 - dB third-order input intercept point (50 : source) f1 = 45.0; f2 = 45.06 MHz Input RF level = 52 dBm - 10 - dBm conversion power gain matched 14.5 dBV step-up 10 17 - dB 50: source - 2.5 - dB Ri(RF) RF input resistance single-ended input - 8 - k: Ci(RF) RF input capacitance - 3.0 4.0 pF Ro(mix) mixer output resistance (pin 20) 1.25 1.5 - k: Ga(IF) IF amp gain 50:source - 44 - dB LG limiter gain 50 :source - 58 - dB AM rejection 30 % AM 1 kHz - 50 - dB audio level gain of two 60 120 - mV SINAD sensitivity IF level = 110 dBm - 17 - dB - 55 - dB PG(conv) IF section THD total harmonic distortion S/N signal-to-noise ratio no modulation for noise - 60 - dB IF RSSI output, R9 = 2 k: [1] IF level = 110 dBm - 0.5 1.0 V IF level = 50 dBm - 1.7 2.4 V - 60 - dB RSSI range Zi(IF) IF input impedance pin 18 1.3 1.5 - k: Zo(IF) IF output impedance pin 16 - 0.3 - k: Zi(lim) limiter input impedance pin 14 1.3 1.5 - k: Zo(lim) limiter output impedance pin 11 - 0.3 - k: VO(lim) limiter output voltage pin 11 - 130 - mVRMS RF level = 110 dBm - 12 - dB RF/IF section (internal LO) system SINAD sensitivity [1] : : The generator source impedance is 50 , but the SA58640 input impedance at pin 18 is 1500 . As a result, IF level refers to the actual signal that enters the SA58640 input (pin 18) which is about 21 dB less than the ‘available power’ at the generator. 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 6 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 12. Application information C26 R18 3.3 k R17 2.4 k FLT1 FLT2 C23 20 C15 C18 C21 19 18 17 IF amp mixer 16 15 14 C17 13 12 11 9 10 limiter RSSI quad OSCILLATOR 1 E B 3 4 2 C1 VREG 5 audio 6 7 8 R11 10 k C8 C9 C2 L1 C7 R10 10 k L2 C5 C6 C10 X1 C12 C27 2.2 µF 45 MHz input R19 11 k IFT1 C19 390 pF C14 RSSI output VCC audio 002aab126 Fig 3. 45 MHz application circuit Table 6: Demoboard application component list Component Value Type C1 51 pF NPO ceramic C2 220 pF NPO ceramic C5 100 nF r10 % monolithic ceramic C6 5 pF to 30 pF trim cap C7 1 nF ceramic C8 10.0 pF NPO ceramic C9 100 nF r 10 % monolithic ceramic C10 10 PF tantalum (minimum) [1] C12 2.2 PF r 10 % tantalum C14 100 nF r 10 % monolithic ceramic 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 7 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system Table 6: Demoboard application component list …continued Component Value Type C15 10 pF NPO ceramic C17 100 nF r 10 % monolithic ceramic C18 100 nF r 10 % monolithic ceramic C19 390 pF r10 % monolithic ceramic C21 100 nF r10 % monolithic ceramic C23 100 nF r 10 % monolithic ceramic C26 100 nF r10 % monolithic ceramic C27 2.2 PF tantalum FLT1 - ceramic filter Murata CFUCF455KB4X-R0 or equivalent FLT2 - ceramic filter Murata CFUCF455KB4X-R0 or equivalent IFT1 330 PH TOKO 836AN-0129Z L1 330 nH TOKO A638AN-0158Z L2 1.2 PH nominal FSLM2520-12K X1 44.545 MHz crystal ICM4712701 R5 not used in application board (see list item 8 on page 9) - R10 8.2 k r 5 % 1e W 4 carbon composition 10 k r5 % 1e W 4 carbon composition 2.4 k r 5 % 1e W 4 carbon composition R18 3.3 k r 5 % 1e W 4 carbon composition R19 11 k r 5 % 1e W 4 carbon composition R11 R17 [1] This value can be reduced when a battery is the power source. 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 8 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 13. Test information RF GENERATOR 45 MHz SA58640 DEMOBOARD RSSI AUDIO VCC (+3) DE-EMPHASIS FILTER DC VOLTMETER C–MESSAGE SCOPE HP339A DISTORTION ANALYZER 002aab127 Fig 4. Application circuit test setup The following list items 1 through 8 apply to Figure 4: 1. 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 noise of the scope and HP339A analyzer. The de-emphasis filter has a fixed 6 dB/Octave slope between 300 Hz and 3 kHz. 2. The ceramic filters can be 30 kHz SFG455A3s made by Murata which have 30 kHz IF bandwidth (they come in blue), or 16 kHz CFU455Ds, also made by Murata (they come in black). All specifications and testing are done with the wideband filter. 3. Set your RF generator at 45.000 MHz, use a 1 kHz modulation frequency and a 6 kHz deviation if you use 16 kHz filters, or 8 kHz if you use 30 kHz filters. 4. The measured typical sensitivity for 12 dB SINAD should be 0.45 PV or 114 dBm at the RF input. 5. The layout is very critical in the performance of the receiver. We highly recommend our demo board layout. 6. The smallest RSSI voltage (i.e., when no RF input is present and the input is terminated) is a measure of the quality of the layout and design. If the lowest RSSI voltage is 500 mV or higher, it means the receiver is in regenerative mode. In that case, the receiver sensitivity will be worse than expected. 7. All of the inductors, the quad tank, and their shield must be grounded. A 10 PF to 15 PF or higher value tantalum capacitor on the supply line is essential. A low frequency ESR screening test on this capacitor will ensure consistent good sensitivity in production. A 0.1 PF bypass capacitor on the supply pin, and grounded near the 44.545 MHz oscillator improves sensitivity by 2 dB to 3 dB. 8. R5 can be used to bias the oscillator transistor at a higher current for operation above 45 MHz. Recommended value is 22 k:, but should not be below 10 k:. 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 9 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 002aab128 6 VCC = 7 V ICC (mA) 002aab130 20 IF output power (dBm) 0 RF = 45 MHz IF = 455 kHz 5 −20 −40 (1) 4 (2) 5V −60 3 −55 −35 −15 5 25 45 65 85 105 125 t (°C) −80 −66 46 26 6 14 34 RF(3) input level (dBm) (1) Fund product (2) 3rd order product (3) 50 Fig 5. ICC vs. temperature and supply voltage 001aab131 5 : input Fig 6. Mixer third order intercept and compression 002aab132 1.9 (1) (dB) (V) −5 85 °C 27 °C −40 °C 1.5 −15 −25 1.1 −35 (2) −45 0.7 (3) −55 (4) −65 −125 −105 −85 −65 −45 −25 RFlevel (dBm) VCC = 5 V; RF = 45 MHz; deviation = level = 117.6 mVRMS 0.3 −125 −105 −85 −65 −45 RFlevel (dBm) r5 kHz; audio (1) Audio (2) AM rejection (3) THD + noise (4) Noise Fig 7. Sensitivity vs. RF level (+25 qC) Fig 8. RSSI vs. RF level and temperature (VCC = 5 V) 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 10 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 002aab133 300 mVRMS VCC = 7 V 250 200 5V 150 100 −55 −35 −15 5 25 45 65 85 105 125 t (°C) Fig 9. Audio output vs. temperature and supply voltage 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 11 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 14. Package outline SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm D SOT266-1 E A X c y HE v M A Z 11 20 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 10 detail X w M bp e 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) θ mm 1.5 0.15 0 1.4 1.2 0.25 0.32 0.20 0.20 0.13 6.6 6.4 4.5 4.3 0.65 6.6 6.2 1 0.75 0.45 0.65 0.45 0.2 0.13 0.1 0.48 0.18 10 o 0 o Note 1. Plastic or metal protrusions of 0.20 mm maximum per side are not included. OUTLINE VERSION SOT266-1 REFERENCES IEC JEDEC JEITA MO-152 EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 Fig 10. Package outline SOT266-1 (SSOP20) 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 12 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 15. Abbreviations Table 7: Abbreviations Acronym Description AC Alternating Current AM Amplitude Modulation ESD Electrostatic Discharge FM Frequency Modulator IF Intermediate Frequency LC Inductor-Capacitor Circuit LO Local Oscillator RF Radio Frequency RSSI Received Signal Strength Indicator SINAD Signal, Noise And Distortion THD Total Harmonic Distortion XTAL Crystal 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 13 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 16. Revision history Table 8: Revision history Document ID Release date Data sheet status Change notice Doc. number Supersedes SA58640_1 200410xx Objective - 9397 750 14161 - 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 14 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 17. Data sheet status Level Data sheet status [1] Product status [2] [3] Definition I Objective data Development This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. II Preliminary data Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. III Product data Production This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. 18. Definitions 19. Disclaimers Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Right to make changes — Philips Semiconductors reserves the right to make changes in the products - including circuits, standard cells, and/or software - described or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. 20. Contact information For additional information, please visit: http://www.semiconductors.philips.com For sales office addresses, send an email to: [email protected] 9397 750 14161 Objective data sheet © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Rev. 01 — 1 November 2004 15 of 16 SA58640 Philips Semiconductors Low-voltage mixer FM IF system 21. Contents 1 2 3 4 5 6 7 7.1 7.2 8 9 10 11 12 13 14 15 16 17 18 19 20 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 2 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 Functional description . . . . . . . . . . . . . . . . . . . 3 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5 Static characteristics. . . . . . . . . . . . . . . . . . . . . 5 Dynamic characteristics . . . . . . . . . . . . . . . . . . 6 Application information. . . . . . . . . . . . . . . . . . . 7 Test information . . . . . . . . . . . . . . . . . . . . . . . . . 9 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 12 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 14 Data sheet status . . . . . . . . . . . . . . . . . . . . . . . 15 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Contact information . . . . . . . . . . . . . . . . . . . . 15 © Koninklijke Philips Electronics N.V. 2004 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: 1 November 2004 Document number: 9397 750 14161 Published in The U.S.A.