Most integrated GSM RF transceiver so far

Hitachi has launched its most integrated GSM RF transceiver solution to date.

Hitachi has launched its most integrated GSM RF transceiver solution to date.

The HD155141F or 'B4' uses patented direct conversion technology and is compatible with all leading baseband devices.

It significantly reduces overall system size and cost.

The receiver incorporates a flexible, configurable analogue IQ interface and a fully integrated and fully automated DC offset cancellation circuit.

These enable baseband compatibility without the need for special hardware or complicated DSP algorithms.

The device also supports dual-band applications operating in the GSM900 and either DCS1800 or PCS1900 bands and is GPRS compliant up to class 12.

Already the market leader in RF components for GSM and dominant in power amplifiers, radio transceivers and SAW devices, Hitachi offers security of supply for all its components through an extensive, high quality and stable production capability.

Samples of the HD155141F and a full range of support tools, including evaluation boards and application notes, are available now.

The B4 device has been developed with TTPCom, Hitachi's GSM system partner, on the back of an existing successful relationship which has produced four generations of industry leading transceiver solutions.

These include the popular HD15512XF ('B2') and HD15513XF ('B3') devices, both of which are used in tens of millions of handsets today.

The new transceiver incorporates on-chip LNAs for both GSM and either DCS or PCS bands.

All filtering required after the LNA in the receive path is integrated inside the device.

On-chip synthesisers include proven technology to achieve lock times fast enough to support GPRS class 12 operation, while an offset PLL transmitter minimises TX filtering and insertion loss.

State machine control through a standard 3-wire bus simplifies programming of all the device's features.

The HD155141F was designed using Hitachi's 0.35um BiCMOS process.

It is housed in a 56-pin TQFP with a 9 x 9 mm footprint and 0.5mm pin pitch.

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