Cdma 3 V Transmitter If Subsystem With Integrated Voltage Regulator

The AD6122 is a low power IF transmitter subsystem, specifi- cally designed for CDMA applications. It consists of an I and Q Modulator a divide-by-two quadrature generator, high dynamic range IF Amplifiers with voltage-controlled gain and a power- down control input. An integral low dropout Regulator allows operation from battery voltages from 2.9 V to 4.2 V. The gain control input accepts an external gain control voltage input from a DAC It provides 97 dB of gain control with a nominal 75 dB/V scale factor. Either an internal or an external reference may be used to set the gain-control scale factor. The I and Q Modulator accepts differential quadrature base- band inputs from a CDMA baseband converter. The local oscil- lator is injected at twice the IF frequency. A divide-by-two quadrature generator followed by dual polyphase Filters ensures 1 quadrature accuracy. The Modulator provides a common-mode reference output to bias the transmit DACs in the baseband converter to the same common-mode voltage as the Modulator inputs, allowing dc coupling between the two ICs and thus eliminating the need to charge and discharge coupling capacitors. This allows the fastest power-up and power-down times for the AD6122 and CDMA baseband ICs. The AD6122 is fabricated using a 25 GHz ft silicon BiCMOS process and is packaged in a 28-lead SSOP and a 32-leadless LPCC chip scale package (5 mm 5 mm). By Analog Devices, Inc.
AD6122 's PackagesAD6122 's pdf datasheet

AD6122 Pinout, Pinouts
AD6122 pinout,Pin out
This is one package pinout of AD6122,If you need more pinouts please download AD6122's pdf datasheet.

AD6122 Application circuits
AD6122 circuits
This is one application circuit of AD6122,If you need more circuits,please download AD6122's pdf datasheet.

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