SL6679 Direct Conversion FSK Data Receiver Preliminary Information Supersedes September 1996 version, DS4410 - 1.5 DS4410 - 2.1 April 1998 GTH ADJ TC ADJ IAGC OP TP LIM I VBATT BRF1 BRF CNT AFC2 The SL6679 is an advanced Direct Conversion FSK Data Receiver for operation up to 450 MHz. The device integrates all functions to convert a binary FSK modulated RF signal into a demodulated data stream. Adjacent channel rejection is provided using tuneable gyrator filters. RF and audio AGC functions assist operation when large interfering signals are present and an automatic frequency control (AFC) function is provided to extend centre frequency acceptance. 32 31 30 29 28 27 26 25 IRF GND MIXIP A MIX DEC MIXIP B REG CNT VREG TPI FEATURES ■ Very Low Power Operation from Single Cell ■ Superior Sensitivity ■ Operation at 512, 1200 and 2400 Baud ■ On Chip 1 Volt Regulator ■ 1mm Height Miniature Package ■ Automatic Frequency Control Function ■ Programmable Post Detection Filter ■ AGC Detection Circuitry ■ Power Down Function ■ Battery Strength Indicator 9 10 13 7 I1 I2 VCC1 LOIP I GYR I LOIP Q Q1 Q2 TP32 ABSOLUTE MAXIMUM RATINGS Storage temperature 255°C to1150°C Operating temperature 210°C to155°C Maximum voltage on any pin w.r.t. any 14V other pin, subject to the following conditions: Current, pin 3 (MIXIP), pin 5 (MIXPB), <5ma pin 12 (LOIPI) and pin 14 (LOIPB) Most negative voltage on any pin 20·5V w.r.t. gnd 1mm TQFP device, baked and dry packed, supplied in trays 1mm TQFP device, baked and dry packed, supplied in tape and reel 12 SL6679 AFC1 BATT FLAG VCC2 DATA OP BEC AFC OP VREF TPQ Fig. 1 Pin identification diagram (top view). See Table 1 for pin descriptions ORDERING INFORMATION SL6679/KG/TP1Q 24 23 22 21 20 19 18 17 9 10 11 12 13 14 15 16 APPLICATIONS ■ Pagers, including Credit Card, PCMCIA and Watch Pagers ■ Low Data Rate Receivers, e.g. Security Systems SL6679/KG/TP1N 1 2 3 4 5 6 7 8 6 8 29 4 20 11 22 2 18 − MIX DEC + 1·0V BEC VCC1 VCC2 GND VREF 3 26 27 21 4f DETECTOR LIMITER MIXER LIMITER 5 31 1·08V − 30 + 14 15 16 28 AFC 23 17 1 32 Fig. 2 Block diagram of SL6679 24 25 19 SL6679 Pin number Pin name Pin description 1 IRF LNA current source 2 GND Ground 3 MIXIP A Mixer input A 4 MIX DEC Mixer biasing decouple 5 MIXIP B Mixer input B 6 REG CNT 1V regulator control external PNP drive 7 VREG 1V regulator output voltage 8 TPI I channel pre-gyrator filter test point. 9 I1 Mixer output, I channel 10 I2 Mixer output, I channel 11 VCC1 Positive supply 1 12 LOIP I LO input channel I 13 GYRI Gyrator current adjust pin 14 LOIP Q LO input channel Q 15 Q1 Mixer output, Q channel 16 Q2 Mixer output, Q channel 17 TPQ Q channel pre-gyrator filter test point 18 VREF Reference voltage 19 AFC OP AFC output 20 BEC Battery economy control 21 DATA OP Data output pin 22 VCC2 Positive supply 2 23 BATT FLAG Battery flag output 24 AFC1 AFC characteristic defining pin 25 AFC2 AFC characteristic defining pin 26 BRF CNT Bit rate filter control 27 BRF1 Bit rate filter 1, output from detector 28 VBATT Battery flag input voltage 29 TP LIM I I channel limiter (post gyrator filter) test point, output only 30 IAGC OP Audio AGC output current 31 TC ADJ Audio AGC time constant adjust 32 GTH ADJ Audio AGC gain and threshold adjust. RSSI signal indicator Table 1 SL6679 pin descriptions 2 SL6679 ELECTRICAL CHARACTERISTICS (1) Electrical Characteristics (1) are guaranteed over the following range of operating conditions unless otherwise stated TAMB = 125°C, VCC1 = 1·3V, VCC2 = 2·7V Value Characteristic Pin Min. Typ. Max. 1·3 2·7 1·60 390 1·0 2·7 3·5 2·2 490 1·05 3 700 1·31 20 1·0 Supply voltage, VCC1 Supply voltage, VCC2 Supply current, ICC1 Supply current, ICC2 1 volt regulator, VREG 1 volt regulator load current LNA current source, IRF Reference voltage, VREF VREF source current VREF sink current 11 22 11 22 7 7 1 18 18 18 0·95 1·9 1·20 260 0·95 0·25 375 1·15 Data Amplifier DATA OP sink current DATA OP leakage current Output mark:space ratio 21 21 21 25 Battery Economy Power down ICC1 Power down ICC2 BEC input logic high BEC input logic low BEC input current BEC input current 11 22 20 20 20 20 Battery Flag VBATT trigger point BATT FLAG sink current BATT FLAG sink current BATT FLAG sink current VBATT input voltage VBATT input current VBATT input current 28 23 23 23 28 28 28 500 1·25 1·0 9:7 7:9 VCC1<VCC220·8V Including IRF ILOAD = 3mA, external PNP(b>100, VCE = 0·1V) External PNP (hFE>100, VCE = 0·1V) PTAT, voltage on pin 1 = 0·3V and 1·3V Typical temperature coefficient = 10·1mV/°C µA µA Output logic low, pin 21 voltage = 0·3V Output logic high, pin 21 voltage = VCC2 Preamble at 1200 baud, Df = 4kHz, pin 26 = 0V, BRF capacitor = 560pF, DATA OP pullup resistor = 200kΩ 10 10 VCC2 0·3 1·0 1·0 µA µA V V µA µA Pin 20 = logic low Pin 20 = logic low Powered up Powered down Powered up Powered down 1·08 1·12 1·0 V µA µA µA V µA µA Current sunk by pin 23 = 1µA Pin 28 voltage = 1·04V Pin 28 voltage = 1·12V Pin 28 voltage = 1·14V 1·0 25 21·0 21·0 V V mA µA V mA µA V µA µA Conditions 0·5 2·0 VCC220·3V 0 21·0 21·0 1·04 Units 2·0 1·0 1·0 VBATT = 1·14V VBATT = 1·04V Continued… 3 SL6679 ELECTRICAL CHARACTERISTICS (1) (Cont.) Electrical Characteristics (1) are guaranteed over the following range of operating conditions unless otherwise stated TAMB = 125°C, VCC1 = 1·3V, VCC2 = 2·7V Value Characteristic Mixers LO DC bias voltage Gain to TPI Gain to TPQ Match of gain to TPI and TPQ 12,14 3,5,8,12 3,5,14, 17 3,5,8, 12,14,17 Audio AGC IAGC OP max. sink current IAGC OP leakage current 30 30 AFC AFC DC current, IAFC4k5 AFC DC current 19 19 AFC DC current Bit Rate Filter Control BRF CNT input logic high BRF CNT input logic low Tristate I/P current window BRF 1 output current BRF 1 output current BRF 1 output current BRF CNT input high current BRF CNT input low current 4 Pin 26 26 27 27 27 26 26 Conditions Typ. Max. 38 VCC1 42 46 V dB 38 42 46 dB LO inputs (12, 14) driven in quadrature: 45mVrms at 450MHz, CW. Mixer inputs (3, 5) driven differentially: 0·45mVrms at 450·004MHz, CW. As gain to TPI 21 0 11 dB As gain toTPI 1 µA µA TPI, TPQ signals limiting No signal applied µA µA fC = fLO14·5kHz, CW fC = fLO12·5kHz, CW IAFC4k5 20·2 µA fC = fLO16·5kHz, CW VCC2 V 2400 baud 0·1 10·4 V µA µA µA µA µA µA 1200 baud 512 baud Pin 26 logic high Pin 26 logic low Pin 26 logic tristate (open circuit) 45 IAFC4k5 10·2 19 26 Units Min. 0·0 IAFC4k5 10·7 IAFC4k5 20·9 VCC2 20·3 0 20·4 3·5 1·7 0·74 27·5 27·5 115 17·5 SL6679 ELECTRICAL CHARACTERISTICS (2) Electrical Characteristics (2) are guaranteed over the following range of operating conditions unless otherwise stated. Characteristics are tested at room temperature only and are guaranteed by characterisation test or design. TAMB = 210°C to 155°C, VCC1 = 1·4V to 2·0V, VCC2 = 2·3V to 3·2V. VCC1,VCC220·8V Value Characteristic Supply voltage, VCC1 Supply voltage, VCC2 Supply current, ICC1 Supply current, ICC2 1 volt regulator, VREG 1 volt regulator load current LNA current source, IRF Reference voltage, VREF VREF source current VREF sink current Turn-on time Pin 11 22 11 22 7 7 1 18 18 18 Min. Typ. Max. 0·95 1·9 1·3 2·7 1·60 350 1·0 2·7 3·5 2·4 510 1·05 3 800 1·33 18 0·8 0·93 0·25 375 1·13 Turn-off time Data Amplifier DATA OP sink current DATA OP leakage current Output mark:space ratio 21 21 21 Battery Economy Power down ICC1 Power down ICC2 BEC input logic high BEC input logic low BEC input current BEC input current 11 22 20 20 20 20 Battery Flag VBATT trigger point BATT FLAG sink current BATT FLAG sink current BATT FLAG sink current VBATT input voltage VBATT input current VBATT input current 28 23 23 23 28 28 28 9 V V mA µA V mA µA V µA µA ms 2 ms 500 1·25 22 1·5 9:7 7:9 VCC1<VCC220·8V at >25°C only Including IRF ILOAD = 3mA, external PNP(b>100, VCE = 0·1V) External PNP(hFE>100, VCE = 0·1V) PTAT, voltage on pin 1 = 0·3V and 1·3V Typical temperature coefficient = 10·1mV/°C Stable data O/P when 3dB above sensitivity. CVREF = 2·2µF Fall to 10% of steady state ICC1. CVREF = 2·2µF µA µA Output logic low, pin 21 voltage = 0·3V Output logic high, pin 21 voltage = VCC2 Preamble at 1200 baud, Df = 4kHz, pin 26 = 0V, BRF capacitor = 560pF, DATA OP pullup resistor = 200kΩ 12 12 VCC2 0·3 1·5 1·5 µA µA V V µA µA Pin 20 = logic low Pin 20 = logic low Powered up Powered down Powered up Powered down 1·08 1·12 2 V µA µA µA V µA µA Current sunk by pin 23 = 1µA Pin 28 voltage = 1·04V Pin 28 voltage = 1·12V Pin 28 voltage = 1·14V 2 20 21·5 21·5 Conditions 0·5 2·0 VCC220·3V 0 21·5 21·5 1·04 Units 2·0 1·5 1·5 VBATT = 1·14V VBATT = 1·04V Continued… 5 SL6679 ELECTRICAL CHARACTERISTICS (2) (Cont.) Electrical Characteristics (2) are guaranteed over the following range of operating conditions unless otherwise stated. Characteristics are tested at room temperature only and are guaranteed by characterisation test or design. TAMB = 210°C to 155°C, VCC1 = 1·4V to 2·0V, VCC2 = 2·3V to 3·2V. VCC1,VCC220·8V Value Characteristic Mixers LO DC bias voltage Gain to TPI Gain to TPQ Match of gain to TPI and TPQ 12,14 3,5,8,12 3,5,14, 17 3,5,8, 12,14,17 Audio AGC IAGC OP max. sink current IAGC OP leakage current 30 30 AFC AFC DC current, IAFC4k5 AFC DC current 19 19 AFC DC current Bit Rate Filter Control BRF CNT input logic high BRF CNT input logic low Tristate I/P current window BRF 1 output current BRF 1 output current BRF 1 output current BRF CNT input high current BRF CNT input low current 6 Pin 26 26 27 27 27 26 26 Conditions Typ. Max. 35 VCC1 42 46 V dB 35 42 46 dB LO inputs (12, 14) driven in quadrature: 45mVrms at 450MHz, CW. Mixer inputs (3, 5) driven differentially: 0·45mVrms at 450·004MHz, CW. As gain to TPI 21·5 0 11·5 dB As gain toTPI 30 45 70 1 µA µA TPI, TPQ signals limiting No signal applied µA µA fC = fLO14·5kHz, CW fC = fLO12·5kHz, CW IAFC4k5 20·1 µA fC = fLO16·5kHz, CW VCC2 V 2400 baud 0·1 10·4 V µA µA µA µA µA µA 1200 baud 512 baud Pin 26 logic high Pin 26 logic low Pin 26 logic tristate (open circuit) IAFC4k5 10·1 19 26 Units Min. 0·0 IAFC4k5 10·7 IAFC4k5 20·9 VCC2 20·3 0 20·4 3·5 1·7 0·74 210 210 110 110 SL6679 RECEIVER CHARACTERISTICS (450MHz) Receiver Characteristics (450MHz) are guaranteed over the following range of operating conditions unless otherwise stated. Characteristics are not tested but are guaranteed by characterisation test or design. All measurements made using the characterisation circuit Fig. 5. See Application Note AN137 for details of test method. TAMB = 210°C to 155°C, VCC1 = 1·04V to 2·0V, VCC2 = 2·3V to 3·2V, VCC1,VCC220·8V, carrier frequency = 450MHz, BER = 1 in 30, AFC open loop. LNA gain set such that an RF signal of273dBm at the LNA input, offset from the LO by 4kHz, gives a typical IF signal level of 300mV p-p at TPI and TPQ. LNA noise figure,2dB Value Characteristic Min. Sensitivity Intermodulation, IP3 2128 2126 2123 2122 2119 Units dBm dBm dBm Conditions 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm 57 55 53 dB dB dB 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm. Channel spacing 25kHz 62·5 60 70 69 66 dB dB dB 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm. Channel spacing 25kHz 11·8 22·7 11·7 23 11·9 22·5 13·0 22·3 12·5 22·3 14·6 21·7 14·6 21·7 kHz kHz kHz kHz kHz kHz 512bps, Df = 4·5kHz, no AFC 512bps, Df = 4·5kHz, no AFC 1200bps, Df = 4·0kHz, no AFC 1200bps, Df = 4·0kHz, no AFC 2400bps, Df = 4·5kHz, no AFC 2400bps, Df = 4·5kHz, no AFC 62·0 62·0 62·8 62·5 62·5 62·9 63·2 kHz kHz kHz 512bps, Df = 4·5kHz, no AFC 1200bps, Df = 4·0kHz, no AFC 2400bps, Df = 4·5kHz, no AFC kHz kHz kHz 512bps, Df = 4·5kHz. All at sensitivity 13dB or above 1200bps, Df = 4·0kHz. All at sensitivity 13dB or above 2400bps, Df = 4·5kHz. All at sensitivity 13dB or above Centre Frequency Acceptance AFC Capture Range (AFC Closed Loop) Max. 50 48 Adjacent Channel Deviation Acceptance Up Down Up Down Up Down Typ. 64 63·5 64 7 SL6679 RECEIVER CHARACTERISTICS (280MHz) Receiver Characteristics (280MHz) are guaranteed over the following range of operating conditions unless otherwise stated. Characteristics are not tested but are guaranteed by characterisation test or design. All measurements made using the characterisation circuit Fig. 5. See Application Note AN137 for details of test method. TAMB = 210°C to 155°C, VCC1 = 1·04V to 2·0V, VCC2 = 2·3V to 3·2V, VCC1,VCC220·8V, carrier frequency = 280MHz, BER = 1 in 30, AFC open loop. LNA gain set such that an RF signal of273dBm at the LNA input, offset from the LO by 4kHz, gives a typical IF signal level of 300mV p-p at TPI and TPQ. LNA noise figure,2dB Value Characteristic Max. 2128 2127 2129 2127 2124 2124 2121 dBm dBm dBm 52 49 57 56 53·5 60 57 dB dB dB 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm. Channel spacing 25kHz 62·5 60 72 69 60 80 77 dB dB dB 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm. Channel spacing 25kHz 11·8 23·8 11·7 23·0 11·9 22·5 13·0 22·9 12·5 22·3 14·6 21·7 14·6 21·7 kHz kHz kHz kHz kHz kHz 512bps, Df = 4·5kHz, no AFC 512bps, Df = 4·5kHz, no AFC 1200bps, Df = 4·0kHz, no AFC 1200bps, Df = 4·0kHz, no AFC 2400bps, Df = 4·5kHz, no AFC 2400bps, Df = 4·5kHz, no AFC 62·0 62·0 63·1 62·9 62·5 63·1 63·2 kHz kHz kHz 512bps, Df = 4·5kHz, no AFC 1200bps, Df = 4·0kHz, no AFC 2400bps, Df = 4·5kHz, no AFC kHz kHz kHz 512bps, Df = 4·5kHz. All at sensitivity 13dB or above 1200bps, Df = 4·0kHz. All at sensitivity 13dB or above 2400bps, Df = 4·5kHz. All at sensitivity 13dB or above dB dB dB 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm dB 2400bps, R14 = 120kΩ (Fig. 5), room temperature only. See Note. Intermodulation, IP3 Adjacent Channel Centre Frequency Acceptance AFC Capture Range (AFC Closed Loop) 64 63·5 64 1MHz Blocking Mark:space amplitude modulation acceptance Conditions Typ. Sensitivity Deviation Acceptance Up Down Up Down Up Down Units Min. 67 65 75 75 73 20 23 78 76 512bps, Df = 4·5kHz 1200bps, Df = 4·0kHz 2400bps, Df = 4·5kHz. LO = 215dBm NOTE The mark:space amplitude acceptance is the maximum amplitude ratio which can occur (for example due to Simulcast conditions) with 2400bps, using a POCSAG decoder with R14 = 120kΩ to achieve an 80% call rate and the lower amplitude set at a sensitivity of 120dB. the maxima and minima of the amplitude modulation correspond to the positive and negative (or vice versa) frequency shifts of the FSK modulation. 8 SL6679 OPERATION OF SL6679 Low Noise Amplifier To achieve optimum performance it is necessary to incorporate a Low Noise RF Amplifier at the front end of the receiver. This is easily biased using the on-chip voltages and current source provided. All voltages and current sources used for bias of the RF amplifier, receiver and mixers should be RF decoupled using 1nF capacitors. The receiver also requires a stable Local Oscillator at the required channel frequency. Local Oscillator The Local Oscillator signal is applied to the device in phase quadrature. This can be achieved with the use of two RC networks operating at their 23dB/45° transfer characteristic. The RC characteristics for I and Q channels are combined to give a full 90° phase differential between the LO ports of the device. Each LO port also requires an equal level of drive from the oscillator. This is achieved by forming the two RC networks into a power divider. Gyrator Filters The on-chip filters include an adjustable gyrator filter. This may be adjusted by changing the value of the resistor connected between pin 13 and GND. This allows adjustment of the filters’ cutoff frequency and allows for compensation for possible process variations. Audio AGC (Fig. 3) The Audio AGC consists of a current sink which is controlled by the audio (baseband) signal. It has three parameters that may be controlled by the user. These are the attack (turn on ) time, decay (duration) time and threshold level. The attack time is simply determined by the value of the external capacitor connected to TCADJ. The external capacitor is in series with an internal 100kΩ resistor and the time constant of this circuit dictates the attack time of the AGC. i.e. tATTACK = 100kΩ3C18 The decay time is determined by the external resistor connected in parallel with the capacitor CTC. The decay time is simply tDECAY = R173C18 When a large audio (baseband) signal is incident on the input to the AGC circuit, the variable current source is turned on. This causes a voltage drop across R13. The voltage potential between VREF and the voltage on pin 31 causes a current to flow in pin 30. This charges up C18 through the 100kΩ internal resistor. As the voltage across the capacitor increases, a current source is turned on and this sinks current from pin 32. The current sink on pin 32 can be used to drive the external AGC circuit by causing a PIN diode to conduct, reducing the signal to the RF amplifier. RF AGC The RF AGC is an automatic gain control loop that protects the mixer’s RF inputs, Pins 3 and 5, from large out of band RF signals. The loop consists of an RF received signal strength indicator which detect the signal at the inputs of the mixers. This RSSI signal is then used to control the LNA current source (pin 1). Regulator The on-chip regulator should be used in conjunction with a suitable PNP transistor to achieve regulation. As the transistor forms part of the regulator feedback loop the transistor should exhibit the following characteristics: HFE.100 for VCE. = 0·1V If no external transistor is used, the maximum current sourcing capability of the regulator is limited to 30µA. Automatic Frequency Control (Fig. 4) The Automatic Frequency Control consists of a detection circuit which gives a current output at AFC OP whose magnitude and sign is a function of the difference between the local oscillator (fLO) and carrier frequencies (fC). This output current is then filtered by an off-chip integrating capacitor. The integrator’s output voltage is used to control a voltage control crystal oscillator. This closes the AFC feedback loop giving the automatic frequency control function. For an FSK modulated incoming RF carrier, the AFC OP current’s polarity is positive, i.e.current is sourced for fLO,fC,fLO14kHz and negative, i.e. current is sunk, for fLO.fC.fLO24kHz. The magnitude of the AFC OP current is a function of frequency offset and the transmitted data’s bit stream. If the carrier frequency, (fC), equals the local oscillator frequency, (fLO) then the magnitude of the current is zero. BIT RATE FILTER CONTROL The logic level on pin 26 controls the cutoff frequency of the 1st order bit rate for a given bit rate filter capacitor at pin 27. This allows the cutoff frequency to be changed between fC, 2fC and 0·43fC through the logic level on pin 26. This function is achieved by changing the value of the current in the 4f detector’s output stage. A logic zero (0V to 0·1V) on pin 26 gives a cutoff frequency of fC a logic one (VCC220·3V to VCC2) gives a cut off frequency of 2fC and an open circuit at pin 26 gives a cutoff frequency of 0·43fC. 9 SL6679 RF INPUT SL6679 VCC VCC1 VREF15mV CURRENT SOURCE 1 100k 32 TO RF AMP + + R13 30 − − 31 R17 RDECAY C34 VREF C18 CTC VREF Fig.3 AGC schematic SL6679 18 VOLTAGE REFERENCE CVREF VCC2 AFC DETECTION CIRCUIT C15 CINT 1 C30 CINT 2 0µA/5µA 19 R15 5µA/0µA 320k VCC1 24 R11 C21 25 C22 Fig. 4 AFC schematic Component (Fig. 4) Peak deviation (kHz) Baud rate (bps) C22 C21 R11 3·5 4 4·5 5 5·5 512, 1200, 2400 512, 1200, 2400 512, 1200, 2400 512, 1200, 2400 512, 1200, 2400 750pF 560pF 510pF 470pF 430pF 2·0nF 1·5nF 1·3nF 1·2nF 1·1nF 15kΩ 15kΩ 15kΩ 15kΩ 15kΩ Table 2 AFC defining components 10 TO VCXO VARACTOR DIODE RF IN R12 C1 VREG L1 C2 C28 C4 C7 R2 R3 C5 TR2 C8 TR1 VREG R1 C3 VREF C33 FROM IRF (PIN 1) VC1 C6 VCC1 TR3 T1 C26 VREG C25 TO TR2 TPI VREG REG CNT MIXIP B MIX DEC MIXIP A GND C34 16 15 14 11 10 C32 C9 12 R6 R4 C12 C13 C11 13 SL6679 9 VCC1 C29 8 7 6 5 4 3 2 1 25 26 27 28 29 30 31 VCC1 C27 BRF CNT 32 LOIP I IRF VCC1 TP LIM I GYR I VCC1 R13 GTH ADJ I1 TC ADJ I2 IAGC OP R14 R18 C18 TP LIM I VCC1 VBATT EXT LO LOIP Q BRF1 Q1 BRF CNT R5 C10 Q2 AFC2 R17 VREF C14 R7 R11 C21 TPQ VREF AFC OP BEC DATA OP VCC2 C15 BATT FLAG AFC1 VCC1 17 18 19 20 21 22 23 24 R10 C22 C16 R16 C17 R15 R9 C30 R8 C19 C23 C20 VCC2 C24 VCC1 VREF AFC OP BEC DATA OP VCC2 VCC1 SL6679 Fig. 5 SL6679 characterisation circuit (see Tables 3 and 4 for component values) 11 SL6679 Resistors R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 4·7kΩ 4·7kΩ 1·5kΩ 100Ω 100Ω 100Ω 100Ω 430kΩ 220kΩ S/C 15kΩ 2kΩ 39kΩ 180kΩ 430kΩ 220kΩ 220kΩ 3·3MΩ Capacitors C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 12pF O/C 220nF 1nF 1nF 1nF 1nF 3·3pF 4·7nF 4·7nF 4·7pF 5·6pF 1nF 1nF 1nF 1nF 2·2µF Capacitors (cont.) C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C32 C33 C34 VC1 100nF 1nF 2·2µF 1·5nF 560pF 1nF 2·2µF 100nF 100nF 560pF 1nF 1nF 1nF 100nF 100nF 100nF 3-10pF Inductors L1 T1 56nH 30nH 1:1, Coilcraft M1686-A Transistors TR1 TR2 TR3 Toshiba 2SC5065 Toshiba 2SC5065 FMMT589 (Zetex ZTX550) Table 3 Component list for 280MHz characterisation board Resistors R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 4·7kΩ 4·7kΩ 1·5kΩ 100Ω 100Ω 100Ω 100Ω 430kΩ 220kΩ S/C 15kΩ 2kΩ 39kΩ 180kΩ 430kΩ 220kΩ 220kΩ 3.3MΩ Capacitors C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 O/C O/C 1nF 1nF 1nF 1nF 1nF 3·3pF 4·7nF 4·7nF 3·9pF 3·3pF 1nF 1nF 1nF 1nF 2·2µF Capacitors (cont.) C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C32 C33 C34 VC1 100nF 1nF 2·2µF 1·5nF 560pF 1nF 2·2µF 100nF 100nF 560pF 1nF 1nF 1nF 100nF 100nF 100nF 3-10pF Inductors L1 T1 47nH 16nH 1:1, Coilcraft Q4123-A Transistors TR1 TR2 TR3 Philips BFT25A Philips BFT25A FMMT589 (Zetex ZTX550) Table 4 Component list for 450MHz characterisation board 12 SL6679 TYPICAL DC PARAMETERS (FIGS. 6 TO 8) 2·2 Fig. 6a Typical ICC1 2 1·8 1·6 ICC1 (mA) 1·4 1·2 1 VCC = 3·0, 4·0 0·8 VCC = 1·3, 2·7 0·6 VCC = 1·0, 1·9 0·4 0·2 240 0 220 20 40 60 80 TEMPERATURE °C 0·55 Fig. 6b Typical ICC2 0·5 0·45 0·4 ICC2 (mA) 0·35 0·3 0·25 VCC = 3·0, 4·0 0·2 VCC = 1·3, 2·7 0·15 VCC = 1·0, 1·9 0·1 0·05 240 220 0 20 40 60 80 TEMPERATURE °C Conditions Standard Mitel characterisation board (Fig. 5) ICC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current The Audio AGC and RF AGC are both inactive ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz VBATT connected to VCC1 Fig. 6 Typical ICC1 and ICC2 v. supply and temperature 13 SL6679 1·30 Fig. 7a Typical VREF VREF (V) 1·28 1·26 1·24 VCC = 3·0, 4·0 VCC = 1·3, 2·7 1·22 VCC = 1·0, 1·9 240 0 220 20 40 60 80 TEMPERATURE °C Fig. 7b Typical VREG (load = 2·2kΩ to GND) 1·05 VCC = 3·0, 4·0 VCC = 1·3, 2·7 VCC = 1·0, 1·9 VREG (V) 1·03 1·01 0·99 0·97 240 220 0 20 40 60 TEMPERATURE °C Conditions Standard Mitel characterisation board (Fig. 5) ICC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current The Audio AGC and RF AGC are both inactive ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz VBATT connected to VCC1 Fig. 7 Typical VREF and VREG v. supply and temperature 14 80 SL6679 700 Fig. 8a Typical IRF (VIRF = 0·3V) 600 IRF (µA) 500 400 300 VCC = 3·0, 4·0 200 VCC = 1·3, 2·7 VCC = 1·0, 1·9 100 240 0 220 20 40 60 80 TEMPERATURE °C 700 Fig. 8b Typical IRF (VIRF = 1·3V) 600 IRF (µA) 500 400 300 VCC = 3·0, 4·0 200 VCC = 1·3, 2·7 VCC = 1·0, 1·9 100 240 220 0 20 40 60 80 TEMPERATURE °C Conditions Standard Mitel characterisation board (Fig. 5) ICC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current The Audio AGC and RF AGC are both inactive ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz VBATT connected to VCC1 Fig. 8 Typical IRF v. supply and temperature 15 SL6679 VBATT TRIGGER VOLTAGE (V) 1·1 1·08 1·06 VCC = 3·5 VCC = 2·7 VCC = 2·3 1·04 VCC = 1·9 240 0 220 20 40 60 80 TEMPERATURE °C Conditions Standard Mitel characterisation board (Fig. 5) ICC1 includes IRF LNA current (typ. 500µA) but does not include the regulator load current The Audio AGC and RF AGC are both inactive ICC2 is measured with BATTFLAG and DATAS OP high, fC = 282MHz VBATT connected to VCC1 Fig. 9 Typical battery flag trigger voltage (VBATTFLAG = VCC/2) v. supply and temperature TYPICAL AC PARAMETERS (FIGS. 10 TO 13) TEMPERATURE °C SENSITIVITY (1 IN 30 BER) (dBm) 240 0 220 20 40 60 80 VCC = 3·0, 4·0 2124·00 VCC = 1·3, 2·7 VCC = 1·0, 1·9 2126·00 2128·00 2130·00 Conditions 282 Mitel characterisation board (Fig. 5), fC = 282MHz 1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30 The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal level of 300mVp-p at TPI and TPQ Fig. 10 Typical sensitivity v. supply and temperature 16 SL6679 60 Fig. 11a Typical IP3 IP3(dB) 58 56 54 VCC = 3·0, 4·0 VCC = 1·3, 2·7 52 VCC = 1·0, 1·9 240 0 220 20 40 60 80 TEMPERATURE °C CENTRE FREQUENCY ACCEPTANCE (kHz) 69 Fig. 11b Typical adjacent channel 68·5 68 67·5 VCC = 3·0, 4·0 VCC = 1·3, 2·7 67 VCC = 1·0, 1·9 66·5 240 220 0 20 40 60 80 TEMPERATURE °C Conditions 282 Mitel characterisation board (Fig. 5), fC = 282MHz 1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30 The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal level of 300mVp-p at TPI and TPQ Fig. 11 Typical IP3 and adjacent channel v. supply and temperature 17 SL6679 DEVIATION ACCEPTANCE UP (kHz) 4·0 Fig. 12a Typial deviation acceptance UP 3·5 3·0 VCC = 3·0, 4·0 2·5 VCC = 1·3, 2·7 VCC = 1·0, 1·9 240 0 220 20 40 60 80 TEMPERATURE °C 3·07 Fig 12b Typical deviation acceptance DOWN DEVIATION ACCEPTANCE DOWN (kHz) 3·02 2·97 2·92 VCC = 3·0, 4·0 2·87 VCC = 1·3, 2·7 VCC = 1·0, 1·9 240 220 0 20 40 60 Conditions TEMPERATURE °C 282 Mitel characterisation board (Fig. 5), fC = 282MHz 1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30 The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal level of 300mVp-p at TPI and TPQ Fig. 12 Typical deviation acceptance v. supply and temperature 18 80 SL6679 Fig. 13a Typical centre frequency acceptance CENTRE FREQUENCY ACCEPTANCE (kHz) 3·15 3·1 3·05 3 2·95 VCC = 3·0, 4·0 2·9 VCC = 1·3, 2·7 VCC = 1·0, 1·9 2·85 240 0 220 20 40 60 80 TEMPERATURE °C Fig. 13b Typical1MHz blocking 1MHz BLOCKING ( dB) 80 79 78 77 76 75 74 73 VCC = 3·0, 4·0 VCC = 1·3, 2·7 72 VCC = 1·0, 1·9 71 240 220 0 20 40 60 80 TEMPERATURE °C Conditions 282 Mitel characterisation board (Fig. 5), fC = 282MHz 1200bps baud rate, 4kHz peak deviation frequency, BER 1 in 30 The LNA gain is set such that an RF signal of 273dBm at the LNA input, offset from the LO by 4kHz, gives a typical signal level of 300mVp-p at TPI and TPQ Fig. 13 Typical centre frequency acceptance and 1MHz blocking v. supply and temperature 19 http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. 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