|
CELL PHONE UPCONVERTER/DRIVER IC SAVES CURRENT, SPACE, AND COST
SUNNYVALE, CA-February 19, 2001-Maxim Integrated Products announces the MAX2307 miniature upconverter/driver IC with variable gain. It is designed for Japanese N-CDMA and PDC 900MHz applications in the 900MHz frequency band. The device features ultra-low current consumption and very small size. Implementation cost is optimized by replacing a SAW filter with a low-cost inductor. Low-cost CSP packaging helps further reduce cost.
The MAX2307 contains a unique double-balanced, variable-gain upconverter mixer, variable-gain power amplifier driver, an LO buffer, and bias circuitry to control the two shutdown modes of the device. In full shutdown, the device draws less than 1µA. In partial shutdown mode, the LO buffer is left on to minimize VCO pulling when the transmitter is turned on. Current consumption in this standby mode is only 2.6mA. When the device is putting out its maximum linear power of +6.5dBm, it draws only 34mA from a 2.8V to 4.2V supply. When backed off from peak power by 10dB (the typical output power used for CDMA talk time calculations), current draw automatically reduces to 18mA without user interaction. The device does not require a SAW filter to obtain -35dBc LO leakage, 30dB image suppression, and receive band noise power of only -145dBm/Hz at typical output power (-134dBm/Hz at maximum linear output power).
The MAX2307 comes in a new 1.5mm x 2mm CSP package. It is compatible with low-cost PC boards using standard design rules and via size. Cost, implementation size, and performance are dramatically improved over discrete designs. Prices start at $1.33 (1000-up, FOB USA).
|
