U2730B-N Datasheet, PDF (1/17 Pages) ATMEL Corporation – L-band Down-converter for DAB Receivers

Features
• 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
– Fixed LO Divider Factor: 2464
– Nine Selectable Reference Divider Factors : 32, 33, 35, 36, 48, 49, 63, 64, 65
– A Reference Oscillator (Can Be Overdriven by an External Reference Signal)
– Tristate Phase Detector with Programmable Charge Pump
– Programmable Deactivation of Tuning Output
– Lock-status Indication
– Test Interface
Electrostatic sensitive device.
Observe precautions for handling.
L-band
Down-converter
for DAB
Receivers
U2730B-N
Preliminary
Description
The U2730B-N is a 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. 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–DAB–05/03
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