12-Bit, 41 MSPS

Monolithic ADC

AD9042

Rev. B

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FEATURES

41 MSPS minimum sample rate

80 dB spurious-free dynamic range

595 mW power dissipation

Single 5 V supply

On-chip track-and-hold (T/H) and reference

Twos complement output format

CMOS-compatible output levels

APPLICATIONS

Cellular/PCS base stations

GPS anti jamming receivers

Communications receivers

Spectrum analyzers

Electro-optics

Medical imaging

ATE

FUNCTIONAL BLOCK DIAGRAM

AIN

ENCODE

AD9042

ADC

6

DAC

TH2

A1

TH1

TH3

A2

ADC

DIGITAL ERROR CORRECTION LOGIC

7

ENCODE

GND

MSB

LSB

D10 D9D8D7D6D5D4D3D2D1D0

D11

2.4V

REFERENCE

INTERNAL

TIMING

Figure 1.

GENERAL DESCRIPTION

The AD9042 is a high speed, high performance, low power,

monolithic 12-bit analog-to-digital converter (ADC). All

necessary functions, including track-and-hold (T/H) and

reference, are included on chip to provide a complete conversion

solution. The AD9042 operates from a single 5 V supply and

provides CMOS-compatible digital outputs at 41 MSPS.

Designed specifically to address the needs of wideband, multi-

channel receivers, the AD9042 maintains 80 dB spurious-free

dynamic range (SFDR) over a bandwidth of 20 MHz. Noise

performance is also exceptional; typical signal-to-noise ratio

(SNR) is 68 dB.

The AD9042 is built on a high speed complementary bipolar

process (XFCB) used by Analog Devices, Inc., and uses an

innovative multipass architecture. Units are packaged in a

44-lead LQFP low profile quad flat package. The AD9042

industrial grade is specified from −40°C to +85°C. However,

the AD9042 was designed to perform over the full military

temperature range (−55°C to +125°C); consult the factory for

military grade product options.

PRODUCT HIGHLIGHTS

1.

Guaranteed sample rate is 41 MSPS.

2.

Dynamic performance specified over entire Nyquist band;

spurious signals 80 dBc typical for −1 dBFS input signals.

3.

Low power dissipation: 595 mW off a single 5 V supply.

4.

Reference and track-and-hold included on chip.

5.

Packaged in 44-lead LQFP.