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PLUTO
Dual Mode CDMA/AMPS Baseband Interface Advance Information
DS4722 - 1.8 July 1998
The PLUTO baseband interface circuit is designed for use in dual mode CDMA/AMPS digital cellular telephones. In the telephone, PLUTO provides the interface between the radio (RF & IF) components and the baseband digital signal processor. PLUTO is part of a complete chipset solution for CDMA phones entitled the Planet chipset. The receive (RX) section converts the analog in-phase and quadrature (I & Q) signals into equivalent digital signals whilst the transmit (TX) circuits perform the complementary function of translating digital baseband information into the analog equivalent signals required for the modulator in the radio circuits. VHF PLLS are also included for second RXLO and TXIF generation. PLUTO also contains a 4 channel general purpose ADC which is included for such purposes as environmental and signal strength monitoring.
PIN 1 IDENT PIN 80
FEATURES s Dual mode AMPS/CDMA compatible s Low Power/Low Voltage operation s Standard baseband I and Q interface s 4 Input Auxiliary ADC s Synthesisers APPLICATIONS s Dual Mode CDMA/AMPs digital cellular telephones
TXQ,TXQFM_MOD TXI,TXITXIF PD_RX PD_TX RXIF
PIN 1
GP80 MP28
Figure 1 Pin connections - top view
ABSOLUTE MAXIMUM RATINGS
Supply voltage Voltage applied to any other pin Operating junction temperature Storage temperature ESD (human body model) ORDERING INFORMATION PLUTO/KG/GP1R
ADC<3> ADC<1> FC_I I+,IBAL Q+,QFC_Q ADC<2> ADC<0>
-0.3 to 3.9V -0.3 to Vcc+0.3V 150C -55C to 150C 2kV
TX SYNTH TCXO/4 /4
RX SYNTH 8-BIT DAC 8-BIT DAC 8-BIT DAC
ANALOG MULTIPLEXER
S<0> S<1>
VDD GND 1025 CHIPx8 512 8-BIT DAC 8-BIT DAC 8-BIT 6-BIT ADC ADC 6-BIT 8-BIT ADC ADC 8-BIT ADC SUB FM/ SLEEP/ IDLE/ RESET/ 19.68MHz BUFFER tx calibration and control rx calibration and control
SDATA SCLOCK
TCXO TXCLK TXD<7:0> RXIFMDATA RXID<3:0> ADCENA ADCDATA ADCCLK RXQFMDATA RXQD<3:0>
SLATCH
Figure 2 Block diagram
PLUTO
PIN DESCRIPTION No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Pin Name VDD RSET GND TX_IF IDLEB PD TX FMB PD_RX SLEEPB RX_IF TX_LOCK RX_LOCK TCXO/4 TXD<0> TXD<1> TXD<2> TXD<3> TXD<4> TXD<5> TXD<6> TXD<7> TXCLK TXCLKB CHIPx8 VDD TCXO GND SUB RESET SDATA SCLK SLATCH S<0> n/c RXID<0> RXID<1> RXID<2> RXID<3> S<1> n/c RXQD<0> RXQD<1> RXQD<2> RXQD<3> GND VDD RXFMSTB FMCLK RXQFMDATA RXIFMDATA ADCLK ADCDATA ADCENA SUB Type Power Input Ground Input Digital Output Input Output Input Input Output Output Output Input Input Input Input Input Input Input Input Input Input Input Power Input Ground Ground Input Input Input Input Input Output Output Output Output Input Output Output Output Output Ground Power input Input Output Output Output Output Input Ground A/D Analog Analog Description Power Supply Bias current setting resistor - 40k to ground Ground TX VCO output Idle mode control signal - active low - pulled low if left unconnected TX synthesiser charge pump output FM mode control signal - active low - pulled low if left unconnected RX synthesiser charge pump output Sleep mode control signal - active low - pulled low if left unconnected RX VCO output TX synthesiser lock detect open drain output - pulled high by ext. resistor RX synthesiser lock detect open drain output - pulled high by ext. resistor TCXO divided by 4 output Transmit data bit 0 (lsb) Transmit data bit 1 Transmit data bit 2 Transmit data bit 3 Transmit data bit 4 Transmit data bit 5 Transmit data bit 6 Transmit data bit 7 (MSB) Complimentary Transmit Clock (+ve) Complementary Transmit Clock (-ve) 9.8304MHz synthesiser output Power Supply TCXO 19.68MHz a.c. coupled sinewave input Ground Substrate-Ground Chip master reset - pulled high if not connected Serial Interface Data Input Serial Interface Clock Input Serial Interfce Latch Input Aux ADC mux channel select LSB I-Channel RX CDMA output LSB - low when inactive I-Channel RX CDMA output bit 1 - low when inactive I-Channel RX CDMA output bit 2 - low when inactive I-Channel RX CDMA output bit 3 - low when inactive Aux ADC mux channel select MSB Q_Channel RX CDMA output LSB - low when inactive Q_Channel RX CDMA output bit 1 - low when inactive Q_Channel RX CDMA output bit 2 - low when inactive Q_Channel RX CDMA output bit 3 - low when inactive Ground Power Supply Receive data FM strobe - pulled low if not connected Receive data FM clock - pulled low if not connected Q-Channel RX FM data serial output - low when inactive I-Channel RX FM data serial output -low when inactive Auxiliary ADC serial data clock. Low when inactive Auxiliary ADC serial data output. Low when inactive Auxiliary ADC enable - pull down if not used Substrate - Ground
Digital Analog Digital Analog Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Analog
Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital
Digital Digital Digital Digital Digital Digital Digital
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PLUTO
PIN DESCRIPTION (continued) No 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Pin Name RXQP RXQM SUB RXIP RXIM VDD GND VREF<0> AD<0> AD<1> AD<2> AD<3> Vtest EnTest FC_Q FC_I BAL VDD GND TXIP TXIM SUB TXQP TXQM FMTX VREF<1> Type Input Input Ground Input Input Power Ground Input/Output Input Input Input Input Output Output Output Output Output Power Ground Output Output Ground Output Output Output Input/Output A/D Analog Analog Analog Analog Description Receive Q Channel Input (+ve) Receive Q Channel Input (-ve) Substrate - Ground Receive Q channel input (+ve) Receive Q channel Input (-ve) Power Supply Ground CDMA Receive Circuit Voltage Reference De-Coupling AUX ADC Input AUX ADC Input AUX ADC Input AUX ADC Input RX Filter tuning tone output - pulled low when inactive RX Filter tuning mode control output - pulled low when inactive RX Filter Q channel FC control RX Filter channel FC control RX Filter Gain Balance Control Power Supply Ground Transmit Circuit channel Complementary Output (+ve) Transmit Circuit I channel Complementary Output (-ve) Substrate - Ground Transmit Circuit Q channel Complementary Output (+ve) Transmit Circuit Q channel Complementary Output (-ve) Transmit Circuit FM output Transmit Circuit Voltage Reference De-coupling
Analog Analog Analog Analog Analog Digital Digital Analog Analog Analog
Analog Analog Analog Analog Analog Analog
FUNCTIONAL DESCRIPTION Baseband TX interface circuit The PLUTO baseband transmit circuit acts as an interface between the baseband signal processor and the RF/IF sections in a CDMA/AMPS compatible mobile telephone. The TX circuit has two modes of operation : CDMA mode, transmit data that has previously been encoded by the baseband digital signal processor is converted to equivalent analog signals by matched digital-to-analog converters, these signals are then filtered to remove the image of the sample clock that would otherwise be present at the output before being output to the I and Q modulator as differential signals. FM mode, transmit data is treated in much the same way as in CDMA mode except that only one DAC is used and (because of the much lower bandwidth of AMPS signals) a different reconstruction filter is used before the analog fm signal is output to the mixer as a single ended signal.
CDMA Transmit Signal Path CDMA TX DACs In CDMA mode two matched 8-bit DACs are used to generate the in-phase and quadrature signals, the input data for the DACs is obtained by multiplexing over an 8-bit parallel input port (TXD<7:0>). The transmit data rate is twice as fast as the differential transmit clock (TXCLK). Incoming data that is valid during the rising edge of the transmit clock is loaded into in In-Phase DAC & incoming data that is valid on the falling edge of the transmit clock is loaded into the Quadrature DAC - I and Q values must be modified in the digital baseband chip to account for the halfcycle delay between them. CDMA Analog Reconstruction Filters The frequency spectrum at the output of the transmit DACs contains unwanted frequency components. Reconstruction filters are used to smooth the DAC output signals, providing continuous time output signals at the I and Q output pins thereby removing these undesirable signals. The low pass filters used are 5th order Butterworth, continuous time filters with a nominal cut-off frequency of 1.2 MHz. These filters are designed to have a linear phase response in the pass band. On-chip reconstruction filters minimise the phase and amplitude mismatch between I and Q channels.
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PLUTO
CDMA TX Section Analog Interface The ITx and QTx outputs can be d.c. or a.c. coupled to the external circuits and will differentially drive a minimum resistive load of 5 k and a maximum capacitive load of 20 pF. When the CDMA transmit path is in power-down mode the positive outputs goes high and the negative output goes low. FM Transmit Signal Path FM TX DAC In FM mode, the Q-Channel DAC is used to generate an analog FM modulation signal from the data transmitted from the digital baseband processor. In this mode, all other CDMA TX circuits are powered down. FM Mode Analog Reconstruction Filters The frequency spectrum at the output of the transmit DAC contains unwanted frequency components. A reconstruction filter is used to smooth the DAC output signals. Low-pass filters are used with a cut-off frequency of approximately 13 kHz. These filters are 3rd order Butterworth filters. FM TX Section Analog Interface The FMTX output can be d.c. or a.c. coupled to the radio circuits and will drive a minimum resistive load of 5 k and a maximum capacitive load of 20 pF. When the FM mode is in power-down the output is in high impedance state. CDMA Receive Signal Path CDMA Receive ADC In CDMA mode two high speed 4-bit ADCs are used to digitise the incoming signals before subsequent transmission to the baseband digital signal processor as two parallel 4 bit words (RXI<3:0> and RXQ<3:0>). The sample rate of 9.8304MHz is generated via an on chip synthesiser that requires no setting up or external components. On each falling edge of the synthesised clock (CHIPx8) a new digital sample is output on the digital bus. CDMA Receive Calibration Circuit On entering into CDMA mode from power down or from FM mode the calibration circuits are activated. These circuits measure the differences between the receive path gain in the pass band and in the transition band of both I and Q filters. Via a successive approximation process they tune the receive filters cut-off frequency and amplitude matching using the 8 bit DACs provided for this purpose (I_FC, Q_FC and BAL). Once both filters (I and Q) have been calibrated in this way the DAC outputs will not change until the chip is powered down or the calibration circuit is re-activated in some other way. FM Receive Signal Path In FM mode two low speed 8-bit ADCs are used to digitise the incoming signals before subsequent transmission to the baseband digital signal processor as two serial 8-bit words (FMRXI & FMRXQ). The sample rate is entirely determined by the digital baseband processor (up-to the maximum allowed) via the FMCLK input. In FM mode the receive filters are assumed to track the filters used in CDMA mode i.e. there is no separate tuning mechanism. SYNTHESISERS The Synthesiser block comprises the input buffers, main dividers, phase comparator, charge pump and lock detect circuit for a TX and RX synthesiser. The loop filter components and the VCOs are external to the device. A common reference divider chain is also included together with bias and control circuitry. All blocks apart from reference divider, bias and control logic are duplicated exactly for RX and TX synthesisers. The receive intermediate frequency (RX_IF) is programmable and the transmit intermediate frequency (TX_IF) is fixed at 130.38MHz. AUX ADC The auxiliary converter section contains a single 8-bit successive approximation analog to digital converter, with serial output. In order to maximise the flexibility of PLUTO, a 4 way analog multiplexer is provided, which enables the converter to encode any one of four selectable channels. The converter is intended for such applications as power supply and temperature monitoring. When not in use, the converter is powered down, and its outputs are held low.
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PLUTO
TIMING INFORMATION
Parameter Min t1 t2 t3 t4 t5 t6 t7 t8 TXCLOCK PERIOD (CDMA TX) TXCLOCK HIGH TIME (CDMA TX) TXCLOCK LOW TIME (CDMA TX) TXCLOCK PHASE Delay (CDMA TX) TXCLOCK RISE TIME (CDMA TX) TXCLOCK FALL TIME (CDMA TX) TXD-TXCLOCK SETUP TIME TXCLOCK-TXD HOLD TIME 20 3 2.78 1.39 1.39 101.6 50.8 50.8 3 3 10 20 2.78 1.39 1.39 12 12 1 50 50 50 40 100 100 2.44 0.81 1.62 12 12 1 5 20 20 50 20 50 100 152.4 12 12 Value Typ 203.2 101.6 101.6 1.2 12 12 Max ns ns ns ns ns ns ns ns s s s ns ns ns ns ns ns ns s s s ns ns s ns ns ns s ns ns s s s ns ns s ns ns ns ns ns ns ns CDMA TX Figure 3 CDMA TX Figure 3 CDMA TX Figure 3 CDMA TX Figure 3, FM TX Figure 4 CDMA TX Figure 3, FM TX Figure 4 CDMA TX Figure 3, FM TX Figure 4 CDMA TX Figure 3, FM TX Figure 4 CDMA TX Figure 3, FM TX Figure 4 FM TX Figure 4 FM TX Figure 4 FM TX Figure 4 Figure 5 Figure 5 Figure 5 Figure 5 Figure 5 Figure 5 Figure 5 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 FM RX Figure 6 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 General purpose ADC Figure 7 Serial Interface Figure 8 Serial Interface Figure 8 Serial Interface Figure 8 Serial Interfsce Figure 8 Serial Interface Figure 8 Serial Interface Figure 8 Units Conditions
t11 TXCLOCK PERIOD (FM TX) t12 TXCLOCK HIGH TIME (FM TX) t13 TXCLOCK LOW TIME (FM TX) t14 CHIPx8 PERIOD t15 CHIPx8 HIGH TIME t16 CHIPx8LOW TIME t17 CHIPx8 RISE TIME t18 CHIPx8 FALL TIME t19 RXD Hold Time After CHIPx8 t20 RXD DELAY After CHIPx8 t21 FMCLK PERIOD t22 FMCLK HIGH TIME t23 FMCLK LOW TIME t24 FMCLK RISE TIME t25 FMCLK FALL TIME t26 RXFMSTB HIGH TIME t27 RXFMSTB -FMCLK SETUP TIME t28 FMCLK - RXFMSTB HOLD TIME t29 FMCLK - OUTPUT DATA DELAY t30 ADCENA HIGH _ CONVERSION t31 ADCENA HIGH TIME t32 ADCENA LOW TIME t33 ADCCLK PERIOD t34 ADCCLK HIGH TIME t35 ADCCLK LOW TIME t36 ADCCLK RISE TIME t37 ADCCLK FALL TIME t38 ADCDATA VALID BEFORE ADCCLK t39 ADC DATA HOLD TIME t40 SCLK-SDATA setup time t41 SCLK-SDATA hold time t42 SCLK pulse width t43 SLATCH-SCLK setup time t44 SLATCH pulse width t45 SCLK period
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PLUTO
t1 t2 t3 t4 t4 t5 t6
TXCLK
// //
TXCLKbar
//
TXD<7:0>
//
t7 t8 t9 t10
Figure 3 CDMA TX Mode
t11 t12 t13 t4 t4 t5 t6
TXCLK
TXCLKbar
TXD<7:0> t9 t10
Figure 4. FM TX MODE
t14 t15 t16 t17 t18
CHIPx8 RXQD<3:0> RXID<3:0> t19 t20
Figure 5. CDMA RX MODE
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PLUTO
t21 t22 t23
t24
t25
FMCLK
RXFMSTB RXIFMDATA
t26
t27
t28
LSB-1 RXQFMDATA t29
MSB
LSB
Figure 6. FM RX MODE
t30 t32 t31 ADCENA t33 t37 t36
ADCCLK
t34
t35
MSB ADCDATA t38 t39
LSB
Figure 7. General purpose ADC
t40 SLATCH
t45
t42
t43
t44
SCLK
MSB SDATA t41
LSB
Figure 8. Serial interface
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PLUTO
PROGRAMMING and CONTROL
The control modes for PLUTO can be set via external pins or via a 3 wire serial interface. On initialising PLUTO control is from external pins but can then be set for programming from the serial interface by setting the appropriate bit in a serial input word. The Rx second LO synthesiser is programmed via the serial interface: the Tx IF synthesiser is fixed and requires no programming. Mode Control - External The control modes are set by the pins SLEEPB, FMB and IDLEB as shown in the table below: SLEEPB (Pin 9) 0 1 1 1 1 FMB (Pin 7) X 0 0 1 1 IDLEB (Pin 5) X 0 1 0 1 Sleep Mode FM Receive only FM Receive and Transmit CDMA Receive only CDMA Receive and Transmit Mode
Aux ADC Selection - External The auxiliary analog to digital converters can be selected via pins S0 and S1 as shown in the table below:
S1 (Pin 39) 0 0 1 1
S0 (Pin 33) 0 0 0 1
ADC selected ADC<0> ADC<1> ADC<2> ADC<3>
ADC selection can also be programmed to be via serial interface if required Serial Interface The 3 wire serial interface (SDATA, SCLK and SLATCH) is programmed using 24 bit words as shown below. Timing details are shown in Figure 8.
MSB 23 WORD1 WORD2 0 22 0 21 0 20 0 19 0 0 18 X 0 17 X 0 16 RXC 0 0 0 AD1 AD0 TST 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 MXS CTB 0 0 0 LSB 0 0 1
RXDIV<13:0> 0 0 0
SOP FMB IDB SLB
X RXC RXDIV<13:0> SOP SLB, IDB, FMB TST AD1, AD0 MXS CTB
unused RX Synth comparison frequency :0 = 30kHz, 1 = 5kHZ RX Synth divider ratio External/ Serial mode selection: 0 = Ext, 1 = Serial Sleep, Idle and FM mode control bits (serial mode) Test Mode Control - This is for test purposes only and should be set to 0 Aux ADC select bits (serial mode) External / Serial Aux ADC select: 0 = Ext Enable Rx Calibration: 0 = calibration mode
If SOP is high mode control is via serial bits FMB, IDB and SLB, instead of external pins FMB, IDLEB and SLEEPB. If MXS is high then ADC selection is via AD1, AD0 instead of S<1>, S<0>
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PLUTO
INITIALISATION
Transmit On power-up or reset (RESETB) the Tx reconstruction filters are tuned to give the specified cut-off frequency. This calibration is internal and requires no external input. The calibration time is 1ms. Receive On power-up or reset (RESETB) an autocalibration algorithm is started which can be used to tune the programmable filters in Jupiter. (Jupiter is a programmable active filter designed for use in dual mode CDMA/AMPS system -further details of which can be found in the Jupiter Datasheet). The autocalibration is also initiated when PLUTO is switched into CDMA mode via FMB control. When PLUTO enters calibration mode the En Test (pin 68) goes high. A test signal at 364kHz is then generated at the Vtest output (pin 67). This signal is input to Jupiter which provides a response which is digitised by the I and Q Rx ADCs. An output DAC - BAL - (Pin 71) then tunes the Q channel to match the I and Q channel amplitude via a successive approximation routine. The test signal is then switched to 728kHz which is above the required cut off of the filter. DAC outputs, FC_I and FC_Q are then adjusted to tune the I and Q filters to the correct amplitude with reference to the in band test signal. The filter cut off is tuned to 690kHz. Oversampling in the Rx ADC's ensures sufficient accuracy for the calibration. This calibration routine takes 26ms and after completion En Test goes low and the test signal Vtest is disabled. Only the CDMA filter is tuned, the matching within Jupiter ensures that the FM (AMPS) filter performance meets specification.
0 -0.8 -4
CDMA TX FILTER RESPONSE
0 -0.6
FM TX FILTER RESPONSE
Relative Amplitude (dB)
Relative Amplitude (dB)
-5.8
-3.0
1k
630k Frequency (Hz)
1.25M
10M
10k
29k
100k
Frequency (Hz)
Figure 9 Baseband RX interface circuit
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PLUTO
RECOMMENDED OPERATING CONDITIONS
Characteristic Min Operating voltage range Operating temperature range Input high voltage, VIH Input low voltage, VIL Master clock amplitude Input current, IIH Input capacitance, CIN Output high voltage, VOH Output low voltage, VOL Tri-state leakage current VDD-0.4 0.4 10 2.7 -40 VDD-0.8 800 0.1 5 Value Typ Max 3.6 +85 0.8 V C V V mV pk-pk A pF V V A IOUT = 100A IOUT = 100A AC coupled 19.68MHz sinusoidal signal Units Conditions
ELECTRICAL CHARACTERISTICS
TAMB = -30C to +70C, VCC = +2.7 to +3.6V. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated.
Characteristic Min CDMA TX Interface Resolution Integral non-linearity Differential non-linearity Full scale output Voltage Output common mode Voltage +Ve output Voltage in Power-down mode -Ve output Voltage in Power-down mode I,Q gain mismatch I,Q phase imbalance Differential offset PSRR Load resistance Load capacitance Filter type Filter order Filter cut off Filter Pass Band ripple Filter stop band attenuation Sample rate 6 5th See Figure 9 See Figure 9 See Figure 9 Msample/s 5 20 50 1.6 1.1 0.04 2.05 1.2 0.1 8 0.5 0.5 2.4 1.3 0.16 0.15 1 TBD Bits LSB LSB V V V V dB degrees mV dB k pF Butterwoth low pass VDD to differential I & Q outputs, 100mV pk-pk at 100kHz Vpp differential Value Typ Max Units Conditions
Vdd-0.16 Vdd-0.1 Vdd-0.04
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PLUTO
ELECTRICAL CHARACTERISTICS (continued)
TAMB = -30C to +70C, VCC = +2.7 to +3.6V. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated. Characteristic Min FM TX Interface Resolution Integral non linearity Differential non linearity Output Voltage range Output Voltage mid scale PSRR Load resistance Load capacitance Filter type Filter order Filter Pass Band ripple Filter stop band attenuation Filter cut-off CDMA RX Interface Resolution Full scale input voltage Input common mode range Input sample rate Input resistance (dc) Input capacitance Integral non linearity Differential non linearity IRX and QRX gain matching 20 10 20 0.15 0.175 0.25 4 1 Vdd -1.4 9.8304 Bits V pk-pk V Ms/s k pF LSB LSB dB Measured differentially 3rd See Figure 9 See Figure 9 See Figure 9 5 20 8 0.5 0.5 550 0 50 Bits LSB LSB mVpp V dB k pF Butterworth low pass Differential Vdd to output, 100mV pk-pk at 100kHz Value Typ Max Units Conditions
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PLUTO
ELECTRICAL CHARACTERISTICS (CDMA BASEBAND RX INTERFACE CIRCUIT) continued
TAMB = -30C to +70C, VCC = +2.7 to +3.6V. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated. Characteristic Min FM RX Interface Resolution Full scale input voltage Input dc level Input sample rate Input resistance (dc) Input capacitance Integral non linearity Differential non linearity AUXILIARY CONVERTER SECTION Resolution ADC full scale range ADC zero scale range Integral non linearity Differential non linearity Conversion time ADCCLK 20 410 8 2.5 0.5 1.25 0.75 100 10 20 1.5 0.75 8 1 Vdd-1.4 30 50 Bits V pk-pk V ks/s k pF LSB LSB Bits V V LSB LSB ks/s kHz Measured differentially Value Typ Max Units Conditions
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PLUTO
ELECTRICAL CHARACTERISTICS (Continued)
TAMB = -30C to +70C, VCC = +2.7 to +3.6V. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated. Characteristic Min TRANSMIT SYNTHESISER Input Frequency Lock mode output current current Acquisition mode output current PD output compliance RECEIVER SYNTHESISER Input frequency Lock mode output current Acquisition mode output current PD output compliance POWER SUPPLY CURRENTS Sleep CDMA_IDLE FM_ILDE CDMA_RTTX FM_RXTX 11 5 18 11 0.5 42.69 16 176 0.5 Vdd-0.5 1 15 7 32 15 Value Typ Max Units Conditions
65.19 16 176 Vdd-0.5 52.595
MHz A A V MHz A V V mA mA mA mA mA Rset = 40k Rset = 40k
Rset = 40k Rset = 40k
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