AD6623ASZ Transmit Signal Processor: Pinout, Specification, Datasheet

Modern TxDACs have achieved sufficiently high sampling rates, analog bandwidth, and dynamic range to create the first Intermediate Frequency (IF) directly. The AD6623 synthesizes multicarrier and multistandard digital signals to drive these TxDACs. The RAM-based architecture allows easy reconfiguration for multimode applications. Modulation, pulse-shaping and anti-imaging filters, static equalization, and tuning functions are combined in a single, cost-effective device. Digital IF signal processing provides repeatable manufacturing, higher accuracy, and more flexibility than comparable high dynamic range analog designs. The AD6623 has four identical digital TSPs complete with synchronization circuitry and cascadable wideband channel summation. AD6623 is pin-compatible to AD6622 and can operate in AD6622-compatible control register mode. The AD6623 utilizes a 3.3 V I/O power supply and a 2.5 V core power supply. All I/O pins are 5 V tolerant. All control registers and coefficient values are programmed through a generic microprocessor interface. Intel and Motorola microprocessor bus modes are supported. All inputs and outputs are LVCMOS compatible.

•Pin compatible with the AD6622

•18-Bit Parallel Digital IF Output

Real or interleaved complex

•18-Bit bidirectional parallel digital IF input/output

Allows cascade of chips for additional channels

Clipped or wrapped over a range

Two’s complement or offset binary output

•Four independent digital transmitters in a single package

•RAM coefficient filter (RCF)

Programmable IF and modulation for each channel

Programmable interpolating RAM coefficient filter

Π/4-DQPSK Differential Phase Encoder

Programmable GMSK look-up table

Programmable QPSK look-up table

All-pass phase equalizer

Programmable fine scaler

Programmable power ramp unit

•High-speed CIC interpolating filter

•Digital resampling for noninteger interpolation rates

•NCO frequency translation

Carrier output from DC to 52MHz

Spurious performance better than –100dBc

•Separate 3-Wire serial data input for each channel

Bidirectional serial clocks and frames

•Microprocessor control

•2.5V CMOS core, 3.3V outputs, 5V Inputs

•JTAG boundary scan

•Cellular/PCS base stations

•Micro/Pico cell base stations

•Wireless local loop base stations

•Multicarrier, multimode digital transmit

GSM, EDGE, IS136, PHS, IS95, TDS CDMA, UMTS, CDMA2000

•Phased array beamforming antennas

•Software-defined radio

Tuning Resolution Better than 0.025 Hz

Real or complex outputs

Analog Devices Inc. AD6623ASZ technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. AD6623ASZ.

Analog Devices (NASDAQ: ADI) is a world leader in the design, manufacture, and marketing of a broad portfolio of high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits (ICs) used in virtually all types of electronic equipment. Since our inception in 1965, we have focused on solving the engineering challenges associated with signal processing in electronic equipment. Used by over 100,000 customers worldwide, our signal processing products play a fundamental role in converting, conditioning, and processing real-world phenomena such as temperature, pressure, sound, light, speed, and motion into electrical signals to be used in a wide array of electronic devices.