u2730b-n ATMEL Corporation, u2730b-n Datasheet
u2730b-n
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u2730b-n 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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... AGC NRF 5 TANK 4 VCO VREF Power save (analog part) Power down 1 15 PSM OSCB U2730B VCC1 VCC3 VCC4 Internal 5 V supply voltage for frequency synthesizer Analog Band- part gap Lock detector RF counter : 2464 Tristate phase ...
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... VCC4 PSM SI2 SI1 26 3 VCC1 RF 4 VREF 25 NRF 5 24 TANK GND 6 23 GND GND 22 7 GND GND GND 8 21 GND 9 20 VCC2 VCC3 AGC OSCE 14 15 OSCB PLCK U2730B-N 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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... Overall Properties of the The overall gain of this circuit amounts to 24 dB, the gain-control range is about 30 dB. Signal Path 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. Power Save Mode 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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... Amplifier Mixer Pin 26 Maximum conversion gain p RF Minimum conversion gain p RF AGC range Third order 2 tone p RF1 intermodulation ratio p RF1 *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter U2730B-N 8 Pins Symbol and and AGC 17 V ...
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... I CP -60 dBm I CP -10 dBm 18 V AGCmin = -60 dBm 18 V AGC 1kHz p LO,MIN p LO,MAX refmax Z U2730B-N Min. Typ. Max 1400 1550 - 200 || 1 150 250 50 2.0 IF 100 TH 75 100 125 -125 -100 -75 0.1 0.6 max 5.5 5.75 1000 1261.568 1500 LO -75 ...
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... 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 Symbol 13 ...
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... Figure 4. Gain Control Voltage (Pin 11) 4719A–DAB–05/ ° 8 1490 MHz amb RF -10 -15 -20 - 100 kW th -30 -35 -40 -60 -50 -40 -30 -20 pRF (dBm 100 -60 -50 -40 -30 -20 pRF (dBm) U2730B-N = 1261.568 MHz LO - ...
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... Figure 5. Phase-noise Performance operating Conditions -29.29 dBm ATTEN 10 dB 10.00 dB/DIV Center 1.261 568 GHz RB 100 Hz VB 100 Hz U2730B-N 12 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. = 17.92 MHz, -10 dB, I REF = 200 µ ...
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... Figure 7. VCO Circuit 4719A–DAB–05/03 Gain- controlled mixer 550 MHz IF output 60 MHz V Ref2 BBY51 V 47k Tune 1 TANK Resonator 1 p VREF 100 p Resonator: Ceramic coaxial resonator Murata mm, 1.6 GHz DRR030 KE1R600TC U2730B-N Gain- controlled amplifier V Ref1 AGC ...
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... U2730B-N 14 VAGC 8 100 pF 100 100 NRF GND GND GND GND VCC3 IF AGC U2730B-N VREF TANK GND GND GND VCC2 100 pF 8 47K *3 3 ...
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... Figure 10. Reference Oscillator Operation Figure 11. Rerference Oscillator Overdriven 4719A–DAB–05/03 ext. LO signal (50 W signal gen -10 dBm Quartz crystal 18 pF OSCB Reference signal C1 L1 U2730B-N TANK 100 p 470 nH 50 VREF 1 n Reference devider OSCB OSCE Reference devider OSCE 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–DAB–05/03 ...
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... Fax: (81) 3-3523-7581 Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein ...