U2730B-NFS Atmel, U2730B-NFS Datasheet
U2730B-NFS
Specifications of U2730B-NFS
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U2730B-NFS Summary of contents
Page 1
... Electrostatic sensitive device. Observe precautions for handling. Description The U2730B monolithically integrated L-band down-converter circuit fabricated with Atmel’s advanced UHF5S technology. This IC covers all functions of an L-band down-converter in a DAB receiver. The device includes a gain-controlled amplifier, a gain-controlled mixer, an output buffer, a gain control block, a power save function for the analog part, an L-band oscillator and a complete frequency syntheziser unit ...
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... Figure 1. Block Diagram AGC NRF 5 TANK 4 VCO VREF Power save (analog part) Power down 1 PSM OSCB U2730B VCC1 VCC3 Internal 5 V supply voltage for frequency synthesizer Analog Band- part gap Lock detector RF counter : 2464 Tristate phase detector Reference counter : Nref Test ...
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... Pin Configuration Figure 2. Pinning SSO28 4719A–DAB–05/03 PSM SI2 VCC1 4 25 VREF 5 24 TANK 6 GND GND 8 GND VCC2 PLCK U2730B-N VCC4 SI1 RF NRF GND GND GND GND VCC3 IF AGC TH OSCE OSCB 3 ...
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... Input of internal oscillator/buffer 16 OSCE Output of internal oscillator/buffer 17 TH Threshold voltage of comparator 18 AGC Charge-pump output of comparator, AGC input for amplifier and mixer 19 IF Intermediate frequency output 20 VCC3 Supply voltage 25 NRF RF input (inverted input 27 SI1 Control input 28 VCC4 Supply voltage U2730B-N 4 4719A–DAB–05/03 ...
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... The voltage at pin AGC is in the range of 5.75 V for maximum gain and 0.3 V for minimum gain. This voltage can be use to control a dual-gate GaAs-FET in front of the U2730B-N to achieve an extended AGC range. By applying an external voltage to the AGC pin, the internal AGC loop can be overdriven. ...
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... The overall gain of this circuit amounts to 24 dB, the gain-control range is about 30 dB. With a new AGC concept in the amplifier and mixer, the U2730B-N reaches better inter- modulation distances (DIM3) at higher IF output power levels. For VPSM > (pin 1) the power consumption in the analog part (gain-controlled amplifier and mixer and gain-controlled circuitry) is reduced by 80% ...
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... These scaling factors result in an output frequency of the reference divider of 512 kHz. If harmonics of the Bd. 3 VCO are falling in the L-band reception band, this spurious can influence the AGC of U2730B-N. That could be a problem for small incoming signals. In this case it is possible to switch the reference divider from nref to nref+1 ...
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... Supply current (min. gain) V Supply current p (power save mode) V Amplifier Mixer Pin 26 Maximum conversion gain p Minimum conversion gain p AGC range Third order 2 tone p intermodulation ratio p *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter U2730B-N 8 Pins Symbol and and AGC ...
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... AGCmin V max 5.5 5.75 AGC f 1000 1261.568 1500 LO L -75 1kHz p -11 LO,MIN p -5 LO,MAX SF 2464 ref ref V 30 refs V 300 refmax Z 2.7k || 2.5 ref U2730B-N Unit Type MHz C dBm MHz µA A µ MHz dBc/Hz C dBm C dBm MHz rms mV C rms ...
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... Voltage swing 15 pF, Pin CI open or VCC/2 Power-save Mode PSM PSM not active PSM active *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter Example: reference divider factor = 35, f U2730B ° C, see application circuit (Figure 8), unless otherwise specified amb Pin ...
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... Charateristics 4719A–DAB–05/03 Operating conditions 8 Figure 3. IF Output Power (Pin 19) -10 -15 -20 -25 -30 -35 -40 -60 -50 Figure 4. Gain Control Voltage (Pin 11 -60 - ° 1490 MHz, F amb 100 kW th -40 -30 -20 -10 pRF (dBm 100 kW th -40 -30 -20 -10 pRF (dBm) U2730B-N = 1261.568 MHz ...
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... RL -29.29 dBm ATTEN 10 dB 10.00 dB/DIV Center 1.261 568 GHz RB 100 Hz VB 100 Hz U2730B-N 12 Measurement conditions: Values acquired at Pin 19 with HP 70000 spectrum analyzer. RF input (Pin 26) is blocked with 100 pF to GND. A low phase-noise signal generator (Marconi 2042) was taken as PLL reference. ...
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... Figure 6. AGC Control Circuit 550 MHz IF output 60 MHz V Ref2 Figure 7. VCO Circuit V 47k Tune 15 p Resonator Resonator: Ceramic coaxial resonator Murata mm, 1.6 GHz DRR030 KE1R600TC Gain- Gain- controlled controlled mixer amplifier V Ref1 V BBY51 1.8 p TANK 1 p VREF 100 p U2730B-N AGC CC 13 ...
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... V 100 pF 100 VCC4 SI1 PSM SI2 1 2 Power save 100 100 U2730B-N 14 VAGC 8 100 pF 100 100 NRF GND GND GND GND VCC3 IF U2730B-N VCC1 VREF TANK GND GND GND VCC2 100 pF 8.5 V 1 47K *3 3 100K AGC TH OSCE OSCB ...
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... Figure 9. Application Circuit for External LO Signal ext. LO signal (50 W signal gen -10 dBm LO Figure 10. Reference Oscillator Operation 68 pF Quartz crystal Figure 11. Rerference Oscillator Overdriven Reference signal L1 TANK 100 p 470 nH 50 VREF 1 n Reference devider OSCB 33 pF OSCE 18 pF Reference devider OSCB C1 OSCE U2730B-N 15 ...
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... Ordering Information Extended Type Number U2730B-NFS U2730B-NFSG1 Package Information Package SSO28 Dimensions in mm 0.25 0. U2730B-N 16 Package Remarks SSO28 Tube SSO28 Taped and reeled according to IEC 286-3 9.10 9.01 1.30 0.15 0.05 8. 5.7 5.3 4.5 4.3 0.15 6.6 6.3 technical drawings according to DIN specifications 4719A– ...
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