AD6633BC/PCBZ Analog Devices Inc, AD6633BC/PCBZ Datasheet

AD6633BC/PCBZ

Manufacturer Part Number

AD6633BC/PCBZ

Description

BOARD EVAL FOR AD6633

Manufacturer

Analog Devices Inc

Datasheet

1.AD6633BCPCB.pdf (2 pages)

Specifications of AD6633BC/PCBZ

Module/board Type

Evaluation Board

For Use With/related Products

AD6633

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

4 or 6 wideband digital upconverter channels

VersaCREST crest reduction engine reduces demands on

One 20-bit complex input port (I, Q interleaved), shared

Two 18-bit output ports for parallel I and Q or a single 18-bit

All-pass phase equalizer filters (meets IS-95 requirements)

Programmable RAM coefficient FIR filters (RCF) with

FIR interpolating filters, 2 per channel

Fifth-order interpolating CIC filter, 1 per channel

Full complex NCO, 32-bit tuning resolution (fine), worst spur

Complex FIR filter for frequency equalization or additional

Output automatic gain control

Full complex composite NCO, 6-bit tuning resolution

16-bit/8-bit MicroPort (Intel® or Motorola® mode)

Serial control port (SPI®- or SPORT-compatible)

3.3 V I/O and 1.8 V core supplies

JTAG boundary scan

User-configurable, built-in, self-test (BIST) capability

APPLICATIONS

Cellular/PCS basestations

Micro/pico cell basestations

Multicarrier cdma2000®, WCDMA, TD-SCDMA basestations

Broadband wireless access head ends (LMDS, MMDS)

Software defined radios

High speed signal processing applications

Rev. Sp0

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

external power amplifiers

among 4 or 6 processing channels

output port for interleaved I and Q

resampling

better than −105 dBc, 1 per channel

filtering

I AND Q DATA[19:0]

MULTIPLEXED

INPUT REQ

INPUT ACK

CLOCK

CH[2:0]

INPUT

I/Q

MUX

FIFO

AND

WIDEBAND CHANNEL

Figure 1. Functional Block Diagram

VersaCREST

VersaCREST™ Crest Reduction Engine

Multichannel Digital Upconverter with

GENERAL DESCRIPTION

The AD6633 is a multichannel, wide bandwidth digital

upconverter (DUC) with crest factor reduction (CFR) technology,

which is available in 4-channel or 6-channel versions. It processes

20-bit baseband input data and generates 18-bit, wideband, real,

or complex output data at up to 125 MSPS. This rate is suitable

for driving digital-to-analog converters (DACs) at the first

intermediate frequency (IF) directly.

The AD6633 synthesizes multicarrier and multistandard digital

signals to drive the DAC(s) with up to six wideband modulated

carriers from a single output port. Each channel includes an

internal peak-to-average power reduction block that reduces

power amplifier (PA) power dissipation. The user-configurable

interpolating filter (RCF) provides multirate processing

(including resampling) and malleable FIR filter characteristics.

An all-pass phase equalizer designed to comply with the

cdma2000 standard follows the RCF. Each channel has its own

32-bit numerically-controlled oscillator (NCO) to up-convert

the filtered/interpolated data to the first IF. Interpolation, anti-

image filtering, all-pass equalization, and NCO 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 AD6633 uses a 3.3 V I/O

power supply and a 1.8 V core power supply. Typical power

consumption is 75 mW per channel or 1.4 W for the complete

device. All I/O pins are 5 V tolerant. All control registers and

coefficient values are programmed through a generic 16-bit

microprocessor interface or a SPI/SPORT-compatible serial

port. Intel and Motorola microprocessor bus modes are

supported. All inputs and outputs are LVCMOS-compatible.

For more information about the AD6633, contact Analog Devices

via email at versaCOMM@analog.com.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

GAIN[2:0]

I[17:0]

Q[17:0]

www.analog.com

AD6633

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AD6633BC/PCBZ Summary of contents

Page 1

FEATURES wideband digital upconverter channels VersaCREST crest reduction engine reduces demands on external power amplifiers One 20-bit complex input port (I, Q interleaved), shared among processing channels Two 18-bit output ports for parallel I ...

Page 2

AD6633 PRODUCT OVERVIEW The AD6633 is a multichannel, wide bandwidth DUC with a VersaCREST crest reduction engine. It processes digital baseband input data and generates wideband, real, or complex IF output data. It drives DACs up to any IF sampled ...

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