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发表于 2007-12-12 20:08:09
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description
The TRF4150 device is a highly integrated transmitter for WCDMA/UMTS applications. The TRF4150
transmitter is part of the TI WCDMA chipset solution that also includes a receiver device (TRF5150), a baseband
analog device (TWL3015), and a digital baseband device (TBB410X). In conjunction with the TWL3015 and
TBB410X devices, the TRF4150 transmitter enables a WCDMA transmitter design that exceeds 3GPP
minimum performance requirements with a wide variety of external filter and power amplifier components.
The TRF4150 transmitter combines the functions of I/Q modulator, VHF VGA, up-convert mixer, UHF VGA,
driver amplifier, and the main and auxiliary synthesizers. The fully integrated main and auxiliary synthesizers
eliminate the need for external VCOs or tank circuits. The settling time for both synthesizers is less than 200 µs.
The UHF and VHF VGA provide a combined greater than 90-dB dynamic range with a single analog control
voltage. In addition, the UHF VGA provides another 20 dB of digital controlled gain range that can be used for
factory calibration purposes. The TRF4150 transmitter provides 6 dBm of WCDMA linear output power at the
driver amplifier output. The TRF4150 low power consumption is competitive. The typical operating current for
the entire IC is 78 mA at 6-dBm output power. The current can be reduced to 67 mA if the circuit is optimized
for 3-dBm operation. The TRF4150 transmitter also provides isolation and buffering function for VCTCXO
signal. It has two buffered VCTCXO outputs; one is intended for the digital baseband device and the other is
for the receiver device.
The TRF4150 transmitter is fabricated in a 0.3-µm SiGe process. The transmitter is encased in an 89-pin tape
very-thin fine-pitch land grid array (T-VFLGA) chip scale package (CSP). Figure 2 shows the block diagram of
the transmitter and its relevant pins. The package area is 7 mm x 7 mm with a 13x13 land (pin) array. There
are 48 lands (pins) on the first (outer) row and 40 lands on the second (inner) row. Figure 1 is the complete pin
out diagram. Table 1 provides the pin descriptions............ |
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IP卡
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡