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Multichannel I/O data converter targets basestations

Posted: 13 Mar 2006 ?? ?Print Version ?Bookmark and Share

Keywords:AD7294? I/O data converter? Analog Devices Inc.? Bettyann Liotta?

Designed for wireless infrastructure applications, this 12bit multichannel I/O data converter from Analog Devices Inc. (ADI) is said to pack all the functions necessary to monitor and control current, voltage and temperature.

The AD7294 provides the complete A/D and D/A interfaces required for modern basestation control and it's suited for bias current control of the power transistors used in power amps employed in CDMA, GSM, EDGE and UMTS cellular basestations, the company said.

The AD7294 integrates a 4-channel, 12bit DAC; a 9-channel, 12bit ADC; two high-side current-sense amplifiers and three temperature sensor channels. This level of integration was achieved, in part, through a proprietary CMOS process developed at ADI, which combines high-voltage capability with high-speed, low-power converter cores.

The integrated high-side current sensor is compliant with high-voltage requirements, operating up to a maximum of 48V, offering 0.5 percent accuracy and 1LSB linearity at 12 bits, while the temperature sensors offer 0.25C resolution with 2C accuracy. Existing solutions require an external amplifier for the high-voltage compliance, the company said.

The AD7294 I/O converter is available now in two package options: a 56-lead lead-frame chip-scale package (LFCSP) and a 64-lead thin quad flat pack (TQFP). Both packages are specified over the extended industrial temperature range (-40C to 105C).

- Bettyann Liotta

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Related Datasheets
Part Number Description Category
? AD7294 12-Bit Monitor and Control System with Multichannel ADC, DACs, Temperature Sensor, and Current Sense Cards and Modules



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