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U2730B-N Datasheet

  • U2730B-N

  • L-band Down-converter for DAB Receivers

  • 17頁

  • ATMEL   ATMEL

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Features
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Supply Voltage: 8.5 V
RF Frequency Range: 1400 MHz to 1550 MHz
IF Frequency Range: 150 MHz to 250 MHz
Enhanced IM3 Rejection
Overall Gain Control Range: 30 dB Typically
DSB Noise Figure: 10 dB
Gain-controlled Amplifier and L-band Mixer
Power-down Function for the Analog Part
On-chip Gain-control Circuitry
On-chip VCO, Typical Frequency 1261.568 MHz
Internal VCO Can Be Overdriven by an External LO
On-chip Frequency Synthesizer
鈥?Fixed LO Divider Factor: 2464
鈥?Nine Selectable Reference Divider Factors : 32, 33, 35, 36, 48, 49, 63, 64, 65
鈥?A Reference Oscillator (Can Be Overdriven by an External Reference Signal)
鈥?Tristate Phase Detector with Programmable Charge Pump
鈥?Programmable Deactivation of Tuning Output
鈥?Lock-status Indication
鈥?Test Interface
L-band
Down-converter
for DAB
Receivers
U2730B-N
Preliminary
Electrostatic sensitive device.
Observe precautions for handling.
Description
The U2730B-N is a monolithically integrated L-band down-converter circuit fabricated
with Atmel鈥檚 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. The
frequency syntheziser block consists of a reference oscillator/buffer, a reference
divider, an RF divider, a tri-state phase detector, a loop filter amplifier, a lock detector,
a programmable charge pump, a test interface and a control interface.
4719A鈥揇AB鈥?5/03
1

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