REV. 0

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a

AD10226

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

Dual-Channel, 12-Bit 125 MSPS

IF Sampling A/D Converter

FUNCTIONAL BLOCK DIAGRAM

D0B

(LSB)

D1B

D2B

D3B

D4B

D5B

D6B

D7B

D8B

D9B

D10B

D11B

(MSB)

D0A

(LSB)

D1A

D2A

D3A

D4A

D5A

D6A

D7A

D8A

D9A

D10A

D11A

(MSB)

ADC

50

T1A

ADC

50

T1B

AD10226

12

TIMING

ENCODEA

ENCODEA

REF

REF_A_OUT

TIMING

ENCODEB

ENCODEB

REF

REF_B_OUT

OUTPUT

RESISTORS

T/H

T/H

12

OUTPUT

RESISTORS

12

12

DFS_A

SFDR_A

DFS_B

SFDR_B

FEATURES

Two Independent 12-Bit, 125 MSPS ADCs

Channel-to-Channel Isolation, > 80 dB

AC-Coupled Signal Conditioning Included

Gain Flatness up to Nyquist, < 0.1 dB

Input VSWR 1.1:1 to Nyquist

80 dB Spurious-Free Dynamic Range

Two’s Complement Output Format

3.3 V or 5 V CMOS-Compatible Output Levels

1.5 W Per Channel

Single-Ended or Differential Input

350 MHz Input Bandwidth

APPLICATIONS

Wireless and Wired Broadband Communications

Base Stations and “Zero-IF” or Direct IF Sampling

Subsystems

Wireless Local Loop (WLL)

Local Multipoint Distribution Service (LMDS)

Radar and Satellite Subsystems

PRODUCT DESCRIPTION

The AD10226 offers two complete ADC channels with on-module

signal conditioning for improved dynamic performance. Each wide

dynamic range ADC has a transformer coupled front end

optimized for direct-IF sampling. The AD10226 has on-chip

track-and-hold circuitry and utilizes an innovative architecture to

achieve 12-bit, 125 MSPS performance. The AD10226 uses

innovative high density circuit design to achieve exceptional

performance, while still maintaining excellent isolation and pro-

viding for board area savings.

The AD10226 operates with 5.0 V analog supply and 3.3 V digital

supply. Each channel is completely independent, allowing opera-

tion with independent ENCODE and analog inputs. The AD10226

is available in a 35 mm square 385-lead BGA package.

PRODUCT HIGHLIGHTS

1. Guaranteed sample rate of 125 MSPS

2. Input signal conditioning included with full-power bandwidth

to 350 MHz

3. Industry-leading IF sampling performance