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VENUS-L
CDMA/AMPS Dual Band and RF Receiver Datasheet
DS5082 ISSUE 2.2 November 2001
Features
* * Selectable dual RF input ports for 900MHz AMPS and 1900MHz CDMA bands. Power Management Control
Ordering Information
VENUSL/KG/QP1S (16 lead QSOP Package, in tubes)
Description
VENUS-L is a dual integrated mixer circuit designed to meet the IS95 and J-STD-008 receive system specifications, operating in the 900MHz and 1900MHz bands. Venus-L built on a Zarlink advanced bipolar process with an FT of 25GHz.
GND
VCC
CDMA IF RF 1900 CDMA IFB
AMPS IF RF 900 AMPS IFB
CHIP ENABLE CONTROL BAND 1900
LO 2GHZ
Figure 1 - Block diagram
LO 1GHZ
VENUS-L
Datasheet
CDMA IF CDMA IFB VCC
1
16
BAND 1900 GND RF 1900
PIN 1 REF. SPOT
LO 2GHZ GND RF 900 GND CHIP ENABLE
GND LO 1GHZ VCC AMPS IFB
8
9
AMPS IF
QSOP16 Figure 2 - Pin Connections
Circuit Description
The RF section of VENUS-L contains all of the circuitry necessary to downconvert the RF signal from 900 MHz or 1900 MHz to an IF of 50-250 MHz, and to correctly interface with a suitable IF SAW filter. Two RF inputs are provided, one for the 1900MHz band and one for the 900 MHz band. The required input is activated by means of the `BAND 1900' pin. The input is a gm stage which will provide a characteristic impedance to correctly terminate the RF image-reject SAW filter. Two LO ports are provided, one for 1900MHz band and one for 900 MHz band, both with low noise buffer amplifiers. External matching components are required on the RF, LO and IF ports.
Pin Description
Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name CDMA IF CDMA IFB VCC LO 2GHZ GND RF 900 GND CHIP ENABLE AMPS IF AMPS IFB VCC LO 1GHZ GND RF 1900 GND BAND 1900 Description CDMA (1900MHz mixer) IF SAW output CDMA (1900MHz mixer) IF SAW output bar Positive supply 2 GHz LO input for 1900MHz mixer Ground 900MHz RF input Ground Logic input for chip enable AMPS (900MHz mixer) IF SAW output AMPS (900MHz mixer) IF SAW output bar Positive supply 1GHz LO input for 900MHz mixer Ground 1900MHz RF input Ground Logic input to select 1900MHz or 900MHz signal path operation
2
Datasheet
Absolute Limits
Description Supply voltage, Vcc Operating temperature, Top Storage temperature, Tstg Junction temperature Logic input high, VIH Logic input low, VIL Min. -30 -40 -30 -0.6 Typ. Max. 4.0 70 125 125 Vcc+0.6 Units V deg C deg C deg C V V
VENUS-L
Comments Pin temperature Ambient temperature
Electrostatic Protection. High frequency RF device. This device has limited ESD protection on some pins (500V Human body Model). Electrostatic handling precautions must be applied.
Operating Modes
Description Standby Mode 900MHz (AMPS) 1900MHz (CDMA) CHIP ENABLE 0 1 1 BAND 1900 X 0 1 Comments All circuits powered down 900MHz (AMPS) signal path enabled 1900MHz (CDMA) signal path enabled
Electrical Characteristics (DC specification)
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 General Supply voltage Operating. Temperature Current Consumption Standby Mode, RF section 1900MHz Mode operation 900MHz Mode operation Control Logic Input logic high, VIH Input logic low, VIL Input high current, IIH Input low current, IIL 2.7 -30 Value Typ 3.0 25 Max 3.6 70 V deg C All Vcc pins. Ambient Units Conditions
10 15 13
100
A mA mA
Vcc-0.5 -0.1 -10 -10
Vcc+0.1 0.5 10 10
V V A A
All logic inputs All logic inputs All logic inputs All logic inputs
3
VENUS-L
Datasheet
Electrical Characteristics (AC specification)
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. Unless otherwise stated the frequencies used for measurements are to be. 1900MHz Signal Path: RF = 1960MHz, LO = 1749.62MHz, IF = 210.38MHz. Characteristic Min 1900MHz Signal Path Overall Power Gain, RF input to IF output Noise Figure Input third order intercept point RF Input impedance 8 9 9 4 50 10 11 dB dB dBm Ohm With simple external matching network. Matching network must include an inductor connected between the RF 1900 pin and GND. With simple external matching network. Matching network mus include an inductor connected between the RF 1900 pin and GND Value Typ Max Input = RF 1900 Output =CDMA IF and CDMA IFB LO= -10dBm from a 50 Ohm source Total to IF outputs (SSB). Units Conditions
RF port Return Loss
15
dB
RF Frequency IF Frequency Input 1dB compression Load impedance
1800 50 -10
2000 250
MHz MHz dBm
1000
Differential. Will require an external resistor and a simple external matching network.
4
Datasheet
Electrical Characteristics (AC specification) Continued
VENUS-L
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. Unless otherwise stated the frequencies used for measurements are to be. 900MHz Signal Path: RF = 881.5MHz, LO = 966.88MHz, IF = 85.38MHz. Characteristic Min 900MHz Signal Path Value Typ Max Input=RF 900 Output=AMPS IF and AMPS IFB 7 8 9 dB LO= -10dBm from a 50ohm source Total to IF outputs (SSB). Units Conditions
Overall Power Gain, RF input to IF output Noise Figure
9
11
dB
Input third order intercept point RF Input impedance
5 50
dBm Ohm With simple external matching network. Matching network must include an inductor connected between the RF 900 pin and GND. With simple external matching network. Matching network must include an inductor connected between the RF 900 pin and GND
Return Loss
15
dB
RF Frequency IF Frequency Input 1dB compression Load impedance
800 50 -8 850
1000 250
MHz MHz dBm Differential. Will require an externa lresistor and a simple external matching network.
RF LO BUFFERS LO feedthrough to IF outputs LO feedthrough to RF inputs LO input level LO input impedance LO port Return Loss
-10 50 15
-30 -40 -5
dBm dBm dBm dB
With simple external matching network With simple external matching network
5
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